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gzdoom/src/p_map.cpp
Edward Richardson 389ff4fc98 Shift self-clip to first check for performance
2015-08-30 22:02:36 +12:00

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// Emacs style mode select -*- C++ -*-
//-----------------------------------------------------------------------------
//
// $Id:$
//
// Copyright (C) 1993-1996 by id Software, Inc.
//
// This source is available for distribution and/or modification
// only under the terms of the DOOM Source Code License as
// published by id Software. All rights reserved.
//
// The source is distributed in the hope that it will be useful,
// but WITHOUT ANY WARRANTY; without even the implied warranty of
// FITNESS FOR A PARTICULAR PURPOSE. See the DOOM Source Code License
// for more details.
//
// $Log:$
//
// DESCRIPTION:
// Movement, collision handling.
// Shooting and aiming.
//
//-----------------------------------------------------------------------------
#include <stdlib.h>
#include <math.h>
#include "templates.h"
#include "m_bbox.h"
#include "m_random.h"
#include "i_system.h"
#include "c_dispatch.h"
#include "doomdef.h"
#include "p_local.h"
#include "p_lnspec.h"
#include "p_effect.h"
#include "p_terrain.h"
#include "p_trace.h"
#include "s_sound.h"
#include "decallib.h"
// State.
#include "doomstat.h"
#include "r_state.h"
#include "gi.h"
#include "a_sharedglobal.h"
#include "p_conversation.h"
#include "r_data/r_translate.h"
#include "g_level.h"
CVAR(Bool, cl_bloodsplats, true, CVAR_ARCHIVE)
CVAR(Int, sv_smartaim, 0, CVAR_ARCHIVE | CVAR_SERVERINFO)
CVAR(Bool, cl_doautoaim, false, CVAR_ARCHIVE)
static void CheckForPushSpecial(line_t *line, int side, AActor *mobj, bool windowcheck);
static void SpawnShootDecal(AActor *t1, const FTraceResults &trace);
static void SpawnDeepSplash(AActor *t1, const FTraceResults &trace, AActor *puff,
fixed_t vx, fixed_t vy, fixed_t vz, fixed_t shootz, bool ffloor = false);
static FRandom pr_tracebleed("TraceBleed");
static FRandom pr_checkthing("CheckThing");
static FRandom pr_lineattack("LineAttack");
static FRandom pr_crunch("DoCrunch");
// keep track of special lines as they are hit,
// but don't process them until the move is proven valid
TArray<line_t *> spechit;
// Temporary holder for thing_sectorlist threads
msecnode_t* sector_list = NULL; // phares 3/16/98
//==========================================================================
//
// GetCoefficientClosestPointInLine24
//
// Formula: (dotProduct(ldv1 - tm, ld) << 24) / dotProduct(ld, ld)
// with: ldv1 = (ld->v1->x, ld->v1->y), tm = (tm.x, tm.y)
// and ld = (ld->dx, ld->dy)
// Returns truncated to range [0, 1 << 24].
//
//==========================================================================
static fixed_t GetCoefficientClosestPointInLine24(line_t *ld, FCheckPosition &tm)
{
// [EP] Use 64 bit integers in order to keep the exact result of the
// multiplication, because in the case the vertexes have both the
// distance coordinates equal to the map limit (32767 units, which is
// 2147418112 in fixed_t notation), the product result would occupy
// 62 bits and the sum of two products would occupy 63 bits
// in the worst case. If instead the vertexes are very close (1 in
// fixed_t notation, which is 1.52587890625e-05 in float notation), the
// product and the sum can be 1 in the worst case, which is very tiny.
SQWORD r_num = ((SQWORD(tm.x - ld->v1->x)*ld->dx) +
(SQWORD(tm.y - ld->v1->y)*ld->dy));
// The denominator is always positive. Use this to avoid useless
// calculations.
SQWORD r_den = (SQWORD(ld->dx)*ld->dx + SQWORD(ld->dy)*ld->dy);
if (r_num <= 0) {
// [EP] The numerator is less or equal to zero, hence the closest
// point on the line is the first vertex. Truncate the result to 0.
return 0;
}
if (r_num >= r_den) {
// [EP] The division is greater or equal to 1, hence the closest
// point on the line is the second vertex. Truncate the result to
// 1 << 24.
return (1 << 24);
}
// [EP] Deal with the limited bits. The original formula is:
// r = (r_num << 24) / r_den,
// but r_num might be big enough to make the shift overflow.
// Since the numerator can't be saved in a 128bit integer,
// the denominator must be right shifted. If the denominator is
// less than (1 << 24), there would be a division by zero.
// Thanks to the fact that in this code path the denominator is greater
// than the numerator, it's possible to avoid this bad situation by
// just checking the last 24 bits of the numerator.
if ((r_num >> (63-24)) != 0) {
// [EP] In fact, if the numerator is greater than
// (1 << (63-24)), the denominator must be greater than
// (1 << (63-24)), hence the denominator won't be zero after
// the right shift by 24 places.
return (fixed_t)(r_num/(r_den >> 24));
}
// [EP] Having the last 24 bits all zero allows left shifting
// the numerator by 24 bits without overflow.
return (fixed_t)((r_num << 24)/r_den);
}
//==========================================================================
//
// PIT_FindFloorCeiling
//
// only3d set means to only check against 3D floors and midtexes.
//
//==========================================================================
static bool PIT_FindFloorCeiling(line_t *ld, const FBoundingBox &box, FCheckPosition &tmf, int flags)
{
if (box.Right() <= ld->bbox[BOXLEFT]
|| box.Left() >= ld->bbox[BOXRIGHT]
|| box.Top() <= ld->bbox[BOXBOTTOM]
|| box.Bottom() >= ld->bbox[BOXTOP])
return true;
if (box.BoxOnLineSide(ld) != -1)
return true;
// A line has been hit
if (!ld->backsector)
{ // One sided line
return true;
}
fixed_t sx, sy;
FLineOpening open;
// set openrange, opentop, openbottom
if ((((ld->frontsector->floorplane.a | ld->frontsector->floorplane.b) |
(ld->backsector->floorplane.a | ld->backsector->floorplane.b) |
(ld->frontsector->ceilingplane.a | ld->frontsector->ceilingplane.b) |
(ld->backsector->ceilingplane.a | ld->backsector->ceilingplane.b)) == 0)
&& ld->backsector->e->XFloor.ffloors.Size() == 0 && ld->frontsector->e->XFloor.ffloors.Size() == 0)
{
P_LineOpening(open, tmf.thing, ld, sx = tmf.x, sy = tmf.y, tmf.x, tmf.y, flags);
}
else
{ // Find the point on the line closest to the actor's center, and use
// that to calculate openings
double dx = ld->dx;
double dy = ld->dy;
fixed_t r = xs_CRoundToInt(((double)(tmf.x - ld->v1->x) * dx +
(double)(tmf.y - ld->v1->y) * dy) /
(dx*dx + dy*dy) * 16777216.f);
if (r <= 0)
{
P_LineOpening(open, tmf.thing, ld, sx = ld->v1->x, sy = ld->v1->y, tmf.x, tmf.y, flags);
}
else if (r >= (1 << 24))
{
P_LineOpening(open, tmf.thing, ld, sx = ld->v2->x, sy = ld->v2->y, tmf.thing->x, tmf.thing->y, flags);
}
else
{
P_LineOpening(open, tmf.thing, ld, sx = ld->v1->x + MulScale24(r, ld->dx),
sy = ld->v1->y + MulScale24(r, ld->dy), tmf.x, tmf.y, flags);
}
}
// adjust floor / ceiling heights
if (open.top < tmf.ceilingz)
{
tmf.ceilingz = open.top;
}
if (open.bottom > tmf.floorz)
{
tmf.floorz = open.bottom;
if (open.bottomsec != NULL) tmf.floorsector = open.bottomsec;
tmf.touchmidtex = open.touchmidtex;
tmf.abovemidtex = open.abovemidtex;
}
else if (open.bottom == tmf.floorz)
{
tmf.touchmidtex |= open.touchmidtex;
tmf.abovemidtex |= open.abovemidtex;
}
if (open.lowfloor < tmf.dropoffz)
tmf.dropoffz = open.lowfloor;
return true;
}
//==========================================================================
//
//
//
//==========================================================================
void P_GetFloorCeilingZ(FCheckPosition &tmf, int flags)
{
sector_t *sec;
if (!(flags & FFCF_ONLYSPAWNPOS))
{
sec = !(flags & FFCF_SAMESECTOR) ? P_PointInSector(tmf.x, tmf.y) : tmf.thing->Sector;
tmf.floorsector = sec;
tmf.ceilingsector = sec;
tmf.floorz = tmf.dropoffz = sec->floorplane.ZatPoint(tmf.x, tmf.y);
tmf.ceilingz = sec->ceilingplane.ZatPoint(tmf.x, tmf.y);
tmf.floorpic = sec->GetTexture(sector_t::floor);
tmf.ceilingpic = sec->GetTexture(sector_t::ceiling);
}
else
{
sec = tmf.thing->Sector;
}
for (unsigned int i = 0; i<sec->e->XFloor.ffloors.Size(); i++)
{
F3DFloor* rover = sec->e->XFloor.ffloors[i];
if (!(rover->flags & FF_SOLID) || !(rover->flags & FF_EXISTS)) continue;
fixed_t ff_bottom = rover->bottom.plane->ZatPoint(tmf.x, tmf.y);
fixed_t ff_top = rover->top.plane->ZatPoint(tmf.x, tmf.y);
if (ff_top > tmf.floorz)
{
if (ff_top <= tmf.z || (!(flags & FFCF_3DRESTRICT) && (tmf.thing != NULL && ff_bottom < tmf.z && ff_top < tmf.z + tmf.thing->MaxStepHeight)))
{
tmf.dropoffz = tmf.floorz = ff_top;
tmf.floorpic = *rover->top.texture;
}
}
if (ff_bottom <= tmf.ceilingz && ff_bottom > tmf.z + tmf.thing->height)
{
tmf.ceilingz = ff_bottom;
tmf.ceilingpic = *rover->bottom.texture;
}
}
}
//==========================================================================
//
// P_FindFloorCeiling
//
//==========================================================================
void P_FindFloorCeiling(AActor *actor, int flags)
{
FCheckPosition tmf;
tmf.thing = actor;
tmf.x = actor->x;
tmf.y = actor->y;
tmf.z = actor->z;
if (flags & FFCF_ONLYSPAWNPOS)
{
flags |= FFCF_3DRESTRICT;
}
if (!(flags & FFCF_ONLYSPAWNPOS))
{
P_GetFloorCeilingZ(tmf, flags);
}
else
{
tmf.ceilingsector = tmf.floorsector = actor->Sector;
tmf.floorz = tmf.dropoffz = actor->floorz;
tmf.ceilingz = actor->ceilingz;
tmf.floorpic = actor->floorpic;
tmf.ceilingpic = actor->ceilingpic;
P_GetFloorCeilingZ(tmf, flags);
}
actor->floorz = tmf.floorz;
actor->dropoffz = tmf.dropoffz;
actor->ceilingz = tmf.ceilingz;
actor->floorpic = tmf.floorpic;
actor->floorsector = tmf.floorsector;
actor->ceilingpic = tmf.ceilingpic;
actor->ceilingsector = tmf.ceilingsector;
FBoundingBox box(tmf.x, tmf.y, actor->radius);
tmf.touchmidtex = false;
tmf.abovemidtex = false;
validcount++;
FBlockLinesIterator it(box);
line_t *ld;
while ((ld = it.Next()))
{
PIT_FindFloorCeiling(ld, box, tmf, flags);
}
if (tmf.touchmidtex) tmf.dropoffz = tmf.floorz;
if (!(flags & FFCF_ONLYSPAWNPOS) || (tmf.abovemidtex && (tmf.floorz <= actor->z)))
{
actor->floorz = tmf.floorz;
actor->dropoffz = tmf.dropoffz;
actor->ceilingz = tmf.ceilingz;
actor->floorpic = tmf.floorpic;
actor->floorsector = tmf.floorsector;
actor->ceilingpic = tmf.ceilingpic;
actor->ceilingsector = tmf.ceilingsector;
}
else
{
actor->floorsector = actor->ceilingsector = actor->Sector;
// [BB] Don't forget to update floorpic and ceilingpic.
if (actor->Sector != NULL)
{
actor->floorpic = actor->Sector->GetTexture(sector_t::floor);
actor->ceilingpic = actor->Sector->GetTexture(sector_t::ceiling);
}
}
}
//==========================================================================
//
// TELEPORT MOVE
//
//
// P_TeleportMove
//
// [RH] Added telefrag parameter: When true, anything in the spawn spot
// will always be telefragged, and the move will be successful.
// Added z parameter. Originally, the thing's z was set *after* the
// move was made, so the height checking I added for 1.13 could
// potentially erroneously indicate the move was okay if the thing
// was being teleported between two non-overlapping height ranges.
//
//==========================================================================
bool P_TeleportMove(AActor *thing, fixed_t x, fixed_t y, fixed_t z, bool telefrag)
{
FCheckPosition tmf;
sector_t *oldsec = thing->Sector;
// kill anything occupying the position
// The base floor/ceiling is from the subsector that contains the point.
// Any contacted lines the step closer together will adjust them.
tmf.thing = thing;
tmf.x = x;
tmf.y = y;
tmf.z = z;
tmf.touchmidtex = false;
tmf.abovemidtex = false;
P_GetFloorCeilingZ(tmf, 0);
spechit.Clear();
bool StompAlwaysFrags = ((thing->flags2 & MF2_TELESTOMP) || (level.flags & LEVEL_MONSTERSTELEFRAG) || telefrag) && !(thing->flags7 & MF7_NOTELESTOMP);
FBoundingBox box(x, y, thing->radius);
FBlockLinesIterator it(box);
line_t *ld;
// P_LineOpening requires the thing's z to be the destination z in order to work.
fixed_t savedz = thing->z;
thing->z = z;
while ((ld = it.Next()))
{
PIT_FindFloorCeiling(ld, box, tmf, 0);
}
thing->z = savedz;
if (tmf.touchmidtex) tmf.dropoffz = tmf.floorz;
FBlockThingsIterator it2(FBoundingBox(x, y, thing->radius));
AActor *th;
while ((th = it2.Next()))
{
if (!(th->flags & MF_SHOOTABLE))
continue;
// don't clip against self
if (th == thing)
continue;
fixed_t blockdist = th->radius + tmf.thing->radius;
if (abs(th->x - tmf.x) >= blockdist || abs(th->y - tmf.y) >= blockdist)
continue;
// [RH] Z-Check
// But not if not MF2_PASSMOBJ or MF3_DONTOVERLAP are set!
// Otherwise those things would get stuck inside each other.
if ((thing->flags2 & MF2_PASSMOBJ || th->flags4 & MF4_ACTLIKEBRIDGE) && !(i_compatflags & COMPATF_NO_PASSMOBJ))
{
if (!(th->flags3 & thing->flags3 & MF3_DONTOVERLAP))
{
if (z > th->z + th->height || // overhead
z + thing->height < th->z) // underneath
continue;
}
}
// monsters don't stomp things except on boss level
// [RH] Some Heretic/Hexen monsters can telestomp
// ... and some items can never be telefragged while others will be telefragged by everything that teleports upon them.
if ((StompAlwaysFrags && !(th->flags6 & MF6_NOTELEFRAG)) || (th->flags7 & MF7_ALWAYSTELEFRAG))
{
// Don't actually damage if predicting a teleport
if (thing->player == NULL || !(thing->player->cheats & CF_PREDICTING))
P_DamageMobj(th, thing, thing, TELEFRAG_DAMAGE, NAME_Telefrag, DMG_THRUSTLESS);
continue;
}
return false;
}
// the move is ok, so link the thing into its new position
thing->SetOrigin(x, y, z);
thing->floorz = tmf.floorz;
thing->ceilingz = tmf.ceilingz;
thing->floorsector = tmf.floorsector;
thing->floorpic = tmf.floorpic;
thing->ceilingsector = tmf.ceilingsector;
thing->ceilingpic = tmf.ceilingpic;
thing->dropoffz = tmf.dropoffz; // killough 11/98
thing->BlockingLine = NULL;
if (thing->flags2 & MF2_FLOORCLIP)
{
thing->AdjustFloorClip();
}
if (thing == players[consoleplayer].camera)
{
R_ResetViewInterpolation();
}
thing->PrevX = x;
thing->PrevY = y;
thing->PrevZ = z;
// If this teleport was caused by a move, P_TryMove() will handle the
// sector transition messages better than we can here.
if (!(thing->flags6 & MF6_INTRYMOVE))
{
thing->CheckSectorTransition(oldsec);
}
return true;
}
//==========================================================================
//
// [RH] P_PlayerStartStomp
//
// Like P_TeleportMove, but it doesn't move anything, and only monsters and other
// players get telefragged.
//
//==========================================================================
void P_PlayerStartStomp(AActor *actor)
{
AActor *th;
FBlockThingsIterator it(FBoundingBox(actor->x, actor->y, actor->radius));
while ((th = it.Next()))
{
if (!(th->flags & MF_SHOOTABLE))
continue;
// don't clip against self, and don't kill your own voodoo dolls
if (th == actor || (th->player == actor->player && th->player != NULL))
continue;
if (!th->intersects(actor))
continue;
// only kill monsters and other players
if (th->player == NULL && !(th->flags3 & MF3_ISMONSTER))
continue;
if (actor->z > th->z + th->height)
continue; // overhead
if (actor->z + actor->height < th->z)
continue; // underneath
P_DamageMobj(th, actor, actor, TELEFRAG_DAMAGE, NAME_Telefrag);
}
}
//==========================================================================
//
//
//
//==========================================================================
inline fixed_t secfriction(const sector_t *sec)
{
fixed_t friction = Terrains[TerrainTypes[sec->GetTexture(sector_t::floor)]].Friction;
return friction != 0 ? friction : sec->friction;
}
inline fixed_t secmovefac(const sector_t *sec)
{
fixed_t movefactor = Terrains[TerrainTypes[sec->GetTexture(sector_t::floor)]].MoveFactor;
return movefactor != 0 ? movefactor : sec->movefactor;
}
//==========================================================================
//
// killough 8/28/98:
//
// P_GetFriction()
//
// Returns the friction associated with a particular mobj.
//
//==========================================================================
int P_GetFriction(const AActor *mo, int *frictionfactor)
{
int friction = ORIG_FRICTION;
int movefactor = ORIG_FRICTION_FACTOR;
fixed_t newfriction;
const msecnode_t *m;
const sector_t *sec;
if (mo->IsNoClip2())
{
// The default values are fine for noclip2 mode
}
else if (mo->flags2 & MF2_FLY && mo->flags & MF_NOGRAVITY)
{
friction = FRICTION_FLY;
}
else if ((!(mo->flags & MF_NOGRAVITY) && mo->waterlevel > 1) ||
(mo->waterlevel == 1 && mo->z > mo->floorz + 6 * FRACUNIT))
{
friction = secfriction(mo->Sector);
movefactor = secmovefac(mo->Sector) >> 1;
// Check 3D floors -- might be the source of the waterlevel
for (unsigned i = 0; i < mo->Sector->e->XFloor.ffloors.Size(); i++)
{
F3DFloor *rover = mo->Sector->e->XFloor.ffloors[i];
if (!(rover->flags & FF_EXISTS)) continue;
if (!(rover->flags & FF_SWIMMABLE)) continue;
if (mo->z > rover->top.plane->ZatPoint(mo->x, mo->y) ||
mo->z < rover->bottom.plane->ZatPoint(mo->x, mo->y))
continue;
newfriction = secfriction(rover->model);
if (newfriction < friction || friction == ORIG_FRICTION)
{
friction = newfriction;
movefactor = secmovefac(rover->model) >> 1;
}
}
}
else if (var_friction && !(mo->flags & (MF_NOCLIP | MF_NOGRAVITY)))
{ // When the object is straddling sectors with the same
// floor height that have different frictions, use the lowest
// friction value (muddy has precedence over icy).
for (m = mo->touching_sectorlist; m; m = m->m_tnext)
{
sec = m->m_sector;
// 3D floors must be checked, too
for (unsigned i = 0; i < sec->e->XFloor.ffloors.Size(); i++)
{
F3DFloor *rover = sec->e->XFloor.ffloors[i];
if (!(rover->flags & FF_EXISTS)) continue;
if (rover->flags & FF_SOLID)
{
// Must be standing on a solid floor
if (mo->z != rover->top.plane->ZatPoint(mo->x, mo->y)) continue;
}
else if (rover->flags & FF_SWIMMABLE)
{
// Or on or inside a swimmable floor (e.g. in shallow water)
if (mo->z > rover->top.plane->ZatPoint(mo->x, mo->y) ||
(mo->z + mo->height) < rover->bottom.plane->ZatPoint(mo->x, mo->y))
continue;
}
else
continue;
newfriction = secfriction(rover->model);
if (newfriction < friction || friction == ORIG_FRICTION)
{
friction = newfriction;
movefactor = secmovefac(rover->model);
}
}
if (!(sec->special & FRICTION_MASK) &&
Terrains[TerrainTypes[sec->GetTexture(sector_t::floor)]].Friction == 0)
{
continue;
}
newfriction = secfriction(sec);
if ((newfriction < friction || friction == ORIG_FRICTION) &&
(mo->z <= sec->floorplane.ZatPoint(mo->x, mo->y) ||
(sec->GetHeightSec() != NULL &&
mo->z <= sec->heightsec->floorplane.ZatPoint(mo->x, mo->y))))
{
friction = newfriction;
movefactor = secmovefac(sec);
}
}
}
if (mo->Friction != FRACUNIT)
{
friction = clamp(FixedMul(friction, mo->Friction), 0, FRACUNIT);
movefactor = FrictionToMoveFactor(friction);
}
if (frictionfactor)
*frictionfactor = movefactor;
return friction;
}
//==========================================================================
//
// phares 3/19/98
// P_GetMoveFactor() returns the value by which the x,y
// movements are multiplied to add to player movement.
//
// killough 8/28/98: rewritten
//
//==========================================================================
int P_GetMoveFactor(const AActor *mo, int *frictionp)
{
int movefactor, friction;
// If the floor is icy or muddy, it's harder to get moving. This is where
// the different friction factors are applied to 'trying to move'. In
// p_mobj.c, the friction factors are applied as you coast and slow down.
if ((friction = P_GetFriction(mo, &movefactor)) < ORIG_FRICTION)
{
// phares 3/11/98: you start off slowly, then increase as
// you get better footing
int velocity = P_AproxDistance(mo->velx, mo->vely);
if (velocity > MORE_FRICTION_VELOCITY << 2)
movefactor <<= 3;
else if (velocity > MORE_FRICTION_VELOCITY << 1)
movefactor <<= 2;
else if (velocity > MORE_FRICTION_VELOCITY)
movefactor <<= 1;
}
if (frictionp)
*frictionp = friction;
return movefactor;
}
//
// MOVEMENT ITERATOR FUNCTIONS
//
//==========================================================================
//
//
// PIT_CheckLine
// Adjusts tmfloorz and tmceilingz as lines are contacted
//
//
//==========================================================================
static // killough 3/26/98: make static
bool PIT_CheckLine(line_t *ld, const FBoundingBox &box, FCheckPosition &tm)
{
bool rail = false;
if (box.Right() <= ld->bbox[BOXLEFT]
|| box.Left() >= ld->bbox[BOXRIGHT]
|| box.Top() <= ld->bbox[BOXBOTTOM]
|| box.Bottom() >= ld->bbox[BOXTOP])
return true;
if (box.BoxOnLineSide(ld) != -1)
return true;
// A line has been hit
/*
=
= The moving thing's destination position will cross the given line.
= If this should not be allowed, return false.
= If the line is special, keep track of it to process later if the move
= is proven ok. NOTE: specials are NOT sorted by order, so two special lines
= that are only 8 pixels apart could be crossed in either order.
*/
if (!ld->backsector)
{ // One sided line
if (tm.thing->flags2 & MF2_BLASTED)
{
P_DamageMobj(tm.thing, NULL, NULL, tm.thing->Mass >> 5, NAME_Melee);
}
tm.thing->BlockingLine = ld;
CheckForPushSpecial(ld, 0, tm.thing, false);
return false;
}
// MBF bouncers are treated as missiles here.
bool Projectile = (tm.thing->flags & MF_MISSILE || tm.thing->BounceFlags & BOUNCE_MBF);
// MBF considers that friendly monsters are not blocked by monster-blocking lines.
// This is added here as a compatibility option. Note that monsters that are dehacked
// into being friendly with the MBF flag automatically gain MF3_NOBLOCKMONST, so this
// just optionally generalizes the behavior to other friendly monsters.
bool NotBlocked = ((tm.thing->flags3 & MF3_NOBLOCKMONST)
|| ((i_compatflags & COMPATF_NOBLOCKFRIENDS) && (tm.thing->flags & MF_FRIENDLY)));
if (!(Projectile) || (ld->flags & (ML_BLOCKEVERYTHING | ML_BLOCKPROJECTILE)))
{
if (ld->flags & ML_RAILING)
{
rail = true;
}
else if ((ld->flags & (ML_BLOCKING | ML_BLOCKEVERYTHING)) || // explicitly blocking everything
(!(NotBlocked) && (ld->flags & ML_BLOCKMONSTERS)) || // block monsters only
(tm.thing->player != NULL && (ld->flags & ML_BLOCK_PLAYERS)) || // block players
((Projectile) && (ld->flags & ML_BLOCKPROJECTILE)) || // block projectiles
((tm.thing->flags & MF_FLOAT) && (ld->flags & ML_BLOCK_FLOATERS))) // block floaters
{
if (tm.thing->flags2 & MF2_BLASTED)
{
P_DamageMobj(tm.thing, NULL, NULL, tm.thing->Mass >> 5, NAME_Melee);
}
tm.thing->BlockingLine = ld;
// Calculate line side based on the actor's original position, not the new one.
CheckForPushSpecial(ld, P_PointOnLineSide(tm.thing->x, tm.thing->y, ld), tm.thing, false);
return false;
}
}
// [RH] Steep sectors count as dropoffs (unless already in one)
if (!(tm.thing->flags & MF_DROPOFF) &&
!(tm.thing->flags & (MF_NOGRAVITY | MF_NOCLIP)))
{
secplane_t frontplane, backplane;
// Check 3D floors as well
frontplane = P_FindFloorPlane(ld->frontsector, tm.thing->x, tm.thing->y, tm.thing->floorz);
backplane = P_FindFloorPlane(ld->backsector, tm.thing->x, tm.thing->y, tm.thing->floorz);
if (frontplane.c < STEEPSLOPE || backplane.c < STEEPSLOPE)
{
const msecnode_t *node = tm.thing->touching_sectorlist;
bool allow = false;
int count = 0;
while (node != NULL)
{
count++;
if (node->m_sector->floorplane.c < STEEPSLOPE)
{
allow = true;
break;
}
node = node->m_tnext;
}
if (!allow)
{
return false;
}
}
}
fixed_t sx = 0, sy = 0;
FLineOpening open;
// set openrange, opentop, openbottom
if ((((ld->frontsector->floorplane.a | ld->frontsector->floorplane.b) |
(ld->backsector->floorplane.a | ld->backsector->floorplane.b) |
(ld->frontsector->ceilingplane.a | ld->frontsector->ceilingplane.b) |
(ld->backsector->ceilingplane.a | ld->backsector->ceilingplane.b)) == 0)
&& ld->backsector->e->XFloor.ffloors.Size() == 0 && ld->frontsector->e->XFloor.ffloors.Size() == 0)
{
P_LineOpening(open, tm.thing, ld, sx = tm.x, sy = tm.y, tm.x, tm.y);
}
else
{ // Find the point on the line closest to the actor's center, and use
// that to calculate openings
fixed_t r = GetCoefficientClosestPointInLine24(ld, tm);
/* Printf ("%d:%d: %d (%d %d %d %d) (%d %d %d %d)\n", level.time, ld-lines, r,
ld->frontsector->floorplane.a,
ld->frontsector->floorplane.b,
ld->frontsector->floorplane.c,
ld->frontsector->floorplane.ic,
ld->backsector->floorplane.a,
ld->backsector->floorplane.b,
ld->backsector->floorplane.c,
ld->backsector->floorplane.ic);*/
if (r <= 0)
{
P_LineOpening(open, tm.thing, ld, sx = ld->v1->x, sy = ld->v1->y, tm.x, tm.y);
}
else if (r >= (1 << 24))
{
P_LineOpening(open, tm.thing, ld, sx = ld->v2->x, sy = ld->v2->y, tm.thing->x, tm.thing->y);
}
else
{
P_LineOpening(open, tm.thing, ld, sx = ld->v1->x + MulScale24(r, ld->dx),
sy = ld->v1->y + MulScale24(r, ld->dy), tm.x, tm.y);
}
// the floorplane on both sides is identical with the current one
// so don't mess around with the z-position
if (ld->frontsector->floorplane == ld->backsector->floorplane &&
ld->frontsector->floorplane == tm.thing->Sector->floorplane &&
!ld->frontsector->e->XFloor.ffloors.Size() && !ld->backsector->e->XFloor.ffloors.Size() &&
!open.abovemidtex)
{
open.bottom = INT_MIN;
}
/* Printf (" %d %d %d\n", sx, sy, openbottom);*/
}
if (rail &&
// Eww! Gross! This check means the rail only exists if you stand on the
// high side of the rail. So if you're walking on the low side of the rail,
// it's possible to get stuck in the rail until you jump out. Unfortunately,
// there is an area on Strife MAP04 that requires this behavior. Still, it's
// better than Strife's handling of rails, which lets you jump into rails
// from either side. How long until somebody reports this as a bug and I'm
// forced to say, "It's not a bug. It's a feature?" Ugh.
(!(level.flags2 & LEVEL2_RAILINGHACK) ||
open.bottom == tm.thing->Sector->floorplane.ZatPoint(sx, sy)))
{
open.bottom += 32 * FRACUNIT;
}
// adjust floor / ceiling heights
if (open.top < tm.ceilingz)
{
tm.ceilingz = open.top;
tm.ceilingsector = open.topsec;
tm.ceilingpic = open.ceilingpic;
tm.ceilingline = ld;
tm.thing->BlockingLine = ld;
}
if (open.bottom > tm.floorz)
{
tm.floorz = open.bottom;
tm.floorsector = open.bottomsec;
tm.floorpic = open.floorpic;
tm.touchmidtex = open.touchmidtex;
tm.abovemidtex = open.abovemidtex;
tm.thing->BlockingLine = ld;
}
else if (open.bottom == tm.floorz)
{
tm.touchmidtex |= open.touchmidtex;
tm.abovemidtex |= open.abovemidtex;
}
if (open.lowfloor < tm.dropoffz)
tm.dropoffz = open.lowfloor;
// if contacted a special line, add it to the list
if (ld->special)
{
spechit.Push(ld);
}
return true;
}
//==========================================================================
//
// Isolated to keep the code readable and fix the logic
//
//==========================================================================
static bool CheckRipLevel(AActor *victim, AActor *projectile)
{
if (victim->RipLevelMin > 0 && projectile->RipperLevel < victim->RipLevelMin) return false;
if (victim->RipLevelMax > 0 && projectile->RipperLevel > victim->RipLevelMax) return false;
return true;
}
//==========================================================================
//
// Isolated to keep the code readable and allow reuse in other attacks
//
//==========================================================================
static bool CanAttackHurt(AActor *victim, AActor *shooter)
{
// players are never subject to infighting settings and are always allowed
// to harm / be harmed by anything.
if (!victim->player && !shooter->player)
{
int infight;
if (level.flags2 & LEVEL2_TOTALINFIGHTING) infight = 1;
else if (level.flags2 & LEVEL2_NOINFIGHTING) infight = -1;
else infight = infighting;
if (infight < 0)
{
// -1: Monsters cannot hurt each other, but make exceptions for
// friendliness and hate status.
if (shooter->flags & MF_SHOOTABLE)
{
// Question: Should monsters be allowed to shoot barrels in this mode?
// The old code does not.
if (victim->flags3 & MF3_ISMONSTER)
{
// Monsters that are clearly hostile can always hurt each other
if (!victim->IsHostile(shooter))
{
// The same if the shooter hates the target
if (victim->tid == 0 || shooter->TIDtoHate != victim->tid)
{
return false;
}
}
}
}
}
else if (infight == 0)
{
// 0: Monsters cannot hurt same species except
// cases where they are clearly supposed to do that
if (victim->IsFriend(shooter))
{
// Friends never harm each other, unless the shooter has the HARMFRIENDS set.
if (!(shooter->flags7 & MF7_HARMFRIENDS)) return false;
}
else
{
if (victim->TIDtoHate != 0 && victim->TIDtoHate == shooter->TIDtoHate)
{
// [RH] Don't hurt monsters that hate the same victim as you do
return false;
}
if (victim->GetSpecies() == shooter->GetSpecies() && !(victim->flags6 & MF6_DOHARMSPECIES))
{
// Don't hurt same species or any relative -
// but only if the target isn't one's hostile.
if (!victim->IsHostile(shooter))
{
// Allow hurting monsters the shooter hates.
if (victim->tid == 0 || shooter->TIDtoHate != victim->tid)
{
return false;
}
}
}
}
}
// else if (infight==1) every shot hurts anything - no further tests needed
}
return true;
}
//==========================================================================
//
// PIT_CheckThing
//
//==========================================================================
bool PIT_CheckThing(AActor *thing, FCheckPosition &tm)
{
fixed_t topz;
bool solid;
int damage;
// don't clip against self
if (thing == tm.thing)
return true;
if (!((thing->flags & (MF_SOLID | MF_SPECIAL | MF_SHOOTABLE)) || thing->flags6 & MF6_TOUCHY))
return true; // can't hit thing
fixed_t blockdist = thing->radius + tm.thing->radius;
if (abs(thing->x - tm.x) >= blockdist || abs(thing->y - tm.y) >= blockdist)
return true;
if ((thing->flags2 | tm.thing->flags2) & MF2_THRUACTORS)
return true;
if ((tm.thing->flags6 & MF6_THRUSPECIES) && (tm.thing->GetSpecies() == thing->GetSpecies()))
return true;
tm.thing->BlockingMobj = thing;
topz = thing->z + thing->height;
if (!(i_compatflags & COMPATF_NO_PASSMOBJ) && !(tm.thing->flags & (MF_FLOAT | MF_MISSILE | MF_SKULLFLY | MF_NOGRAVITY)) &&
(thing->flags & MF_SOLID) && (thing->flags4 & MF4_ACTLIKEBRIDGE))
{
// [RH] Let monsters walk on actors as well as floors
if ((tm.thing->flags3 & MF3_ISMONSTER) &&
topz >= tm.floorz && topz <= tm.thing->z + tm.thing->MaxStepHeight)
{
// The commented-out if is an attempt to prevent monsters from walking off a
// thing further than they would walk off a ledge. I can't think of an easy
// way to do this, so I restrict them to only walking on bridges instead.
// Uncommenting the if here makes it almost impossible for them to walk on
// anything, bridge or otherwise.
// if (abs(thing->x - tmx) <= thing->radius &&
// abs(thing->y - tmy) <= thing->radius)
{
tm.stepthing = thing;
tm.floorz = topz;
}
}
}
// Both things overlap in x or y direction
bool unblocking = false;
if ((tm.FromPMove || tm.thing->player != NULL) && thing->flags&MF_SOLID)
{
// Both actors already overlap. To prevent them from remaining stuck allow the move if it
// takes them further apart or the move does not change the position (when called from P_ChangeSector.)
if (tm.x == tm.thing->x && tm.y == tm.thing->y)
{
unblocking = true;
}
else if (abs(thing->x - tm.thing->x) < (thing->radius+tm.thing->radius) &&
abs(thing->y - tm.thing->y) < (thing->radius+tm.thing->radius))
{
fixed_t newdist = P_AproxDistance(thing->x - tm.x, thing->y - tm.y);
fixed_t olddist = P_AproxDistance(thing->x - tm.thing->x, thing->y - tm.thing->y);
if (newdist > olddist)
{
// ... but not if they did not overlap in z-direction before but would after the move.
unblocking = !((tm.thing->z >= thing->z + thing->height && tm.z < thing->z + thing->height) ||
(tm.thing->z + tm.thing->height <= thing->z && tm.z + tm.thing->height > thing->z));
}
}
}
// [RH] If the other thing is a bridge, then treat the moving thing as if it had MF2_PASSMOBJ, so
// you can use a scrolling floor to move scenery items underneath a bridge.
if ((tm.thing->flags2 & MF2_PASSMOBJ || thing->flags4 & MF4_ACTLIKEBRIDGE) && !(i_compatflags & COMPATF_NO_PASSMOBJ))
{ // check if a mobj passed over/under another object
if (!(tm.thing->flags & MF_MISSILE) ||
!(tm.thing->flags2 & MF2_RIP) ||
(thing->flags5 & MF5_DONTRIP) ||
((tm.thing->flags6 & MF6_NOBOSSRIP) && (thing->flags2 & MF2_BOSS)))
{
if (tm.thing->flags3 & thing->flags3 & MF3_DONTOVERLAP)
{ // Some things prefer not to overlap each other, if possible
return unblocking;
}
if ((tm.thing->z >= topz) || (tm.thing->z + tm.thing->height <= thing->z))
return true;
}
}
if (tm.thing->player == NULL || !(tm.thing->player->cheats & CF_PREDICTING))
{
// touchy object is alive, toucher is solid
if (thing->flags6 & MF6_TOUCHY && tm.thing->flags & MF_SOLID && thing->health > 0 &&
// Thing is an armed mine or a sentient thing
(thing->flags6 & MF6_ARMED || thing->IsSentient()) &&
// either different classes or players
(thing->player || thing->GetClass() != tm.thing->GetClass()) &&
// or different species if DONTHARMSPECIES
(!(thing->flags6 & MF6_DONTHARMSPECIES) || thing->GetSpecies() != tm.thing->GetSpecies()) &&
// touches vertically
thing->z + thing->height >= tm.thing->z && tm.thing->z + tm.thing->height >= thing->z &&
// prevents lost souls from exploding when fired by pain elementals
(thing->master != tm.thing && tm.thing->master != thing))
// Difference with MBF: MBF hardcodes the LS/PE check and lets actors of the same species
// but different classes trigger the touchiness, but that seems less straightforwards.
{
thing->flags6 &= ~MF6_ARMED; // Disarm
P_DamageMobj(thing, NULL, NULL, thing->health, NAME_None, DMG_FORCED); // kill object
return true;
}
// Check for MF6_BUMPSPECIAL
// By default, only players can activate things by bumping into them
if ((thing->flags6 & MF6_BUMPSPECIAL) && ((tm.thing->player != NULL)
|| ((thing->activationtype & THINGSPEC_MonsterTrigger) && (tm.thing->flags3 & MF3_ISMONSTER))
|| ((thing->activationtype & THINGSPEC_MissileTrigger) && (tm.thing->flags & MF_MISSILE))
) && (level.maptime > thing->lastbump)) // Leave the bumper enough time to go away
{
if (P_ActivateThingSpecial(thing, tm.thing))
thing->lastbump = level.maptime + TICRATE;
}
}
// Check for skulls slamming into things
if (tm.thing->flags & MF_SKULLFLY)
{
bool res = tm.thing->Slam(tm.thing->BlockingMobj);
tm.thing->BlockingMobj = NULL;
return res;
}
// [ED850] Player Prediction ends here. There is nothing else they could/should do.
if (tm.thing->player != NULL && (tm.thing->player->cheats & CF_PREDICTING))
{
solid = (thing->flags & MF_SOLID) &&
!(thing->flags & MF_NOCLIP) &&
((tm.thing->flags & MF_SOLID) || (tm.thing->flags6 & MF6_BLOCKEDBYSOLIDACTORS));
return !solid || unblocking;
}
// Check for blasted thing running into another
if ((tm.thing->flags2 & MF2_BLASTED) && (thing->flags & MF_SHOOTABLE))
{
if (!(thing->flags2 & MF2_BOSS) && (thing->flags3 & MF3_ISMONSTER) && !(thing->flags3 & MF3_DONTBLAST))
{
// ideally this should take the mass factor into account
thing->velx += tm.thing->velx;
thing->vely += tm.thing->vely;
if ((thing->velx + thing->vely) > 3 * FRACUNIT)
{
int newdam;
damage = (tm.thing->Mass / 100) + 1;
newdam = P_DamageMobj(thing, tm.thing, tm.thing, damage, tm.thing->DamageType);
P_TraceBleed(newdam > 0 ? newdam : damage, thing, tm.thing);
damage = (thing->Mass / 100) + 1;
newdam = P_DamageMobj(tm.thing, thing, thing, damage >> 2, tm.thing->DamageType);
P_TraceBleed(newdam > 0 ? newdam : damage, tm.thing, thing);
}
return false;
}
}
// Check for missile or non-solid MBF bouncer
if (tm.thing->flags & MF_MISSILE || ((tm.thing->BounceFlags & BOUNCE_MBF) && !(tm.thing->flags & MF_SOLID)))
{
// Check for a non-shootable mobj
if (thing->flags2 & MF2_NONSHOOTABLE)
{
return true;
}
// Check for passing through a ghost
if ((thing->flags3 & MF3_GHOST) && (tm.thing->flags2 & MF2_THRUGHOST))
{
return true;
}
if ((tm.thing->flags6 & MF6_MTHRUSPECIES)
&& tm.thing->target // NULL pointer check
&& (tm.thing->target->GetSpecies() == thing->GetSpecies()))
return true;
// Check for rippers passing through corpses
if ((thing->flags & MF_CORPSE) && (tm.thing->flags2 & MF2_RIP) && !(thing->flags & MF_SHOOTABLE))
{
return true;
}
int clipheight;
if (thing->projectilepassheight > 0)
{
clipheight = thing->projectilepassheight;
}
else if (thing->projectilepassheight < 0 && (i_compatflags & COMPATF_MISSILECLIP))
{
clipheight = -thing->projectilepassheight;
}
else
{
clipheight = thing->height;
}
// Check if it went over / under
if (tm.thing->z > thing->z + clipheight)
{ // Over thing
return true;
}
if (tm.thing->z + tm.thing->height < thing->z)
{ // Under thing
return true;
}
// [RH] What is the point of this check, again? In Hexen, it is unconditional,
// but here we only do it if the missile's damage is 0.
// MBF bouncer might have a non-0 damage value, but they must not deal damage on impact either.
if ((tm.thing->BounceFlags & BOUNCE_Actors) && (tm.thing->Damage == 0 || !(tm.thing->flags & MF_MISSILE)))
{
return (tm.thing->target == thing || !(thing->flags & MF_SOLID));
}
switch (tm.thing->SpecialMissileHit(thing))
{
case 0: return false;
case 1: return true;
default: break;
}
// [RH] Extend DeHacked infighting to allow for monsters
// to never fight each other
if (tm.thing->target != NULL)
{
if (thing == tm.thing->target)
{ // Don't missile self
return true;
}
if (!CanAttackHurt(thing, tm.thing->target))
{
return false;
}
}
if (!(thing->flags & MF_SHOOTABLE))
{ // Didn't do any damage
return !(thing->flags & MF_SOLID);
}
if ((thing->flags4 & MF4_SPECTRAL) && !(tm.thing->flags4 & MF4_SPECTRAL))
{
return true;
}
if ((tm.DoRipping && !(thing->flags5 & MF5_DONTRIP)) && CheckRipLevel(thing, tm.thing))
{
if (!(tm.thing->flags6 & MF6_NOBOSSRIP) || !(thing->flags2 & MF2_BOSS))
{
if (tm.LastRipped != thing)
{
tm.LastRipped = thing;
if (!(thing->flags & MF_NOBLOOD) &&
!(thing->flags2 & MF2_REFLECTIVE) &&
!(tm.thing->flags3 & MF3_BLOODLESSIMPACT) &&
!(thing->flags2 & (MF2_INVULNERABLE | MF2_DORMANT)))
{ // Ok to spawn blood
P_RipperBlood(tm.thing, thing);
}
S_Sound(tm.thing, CHAN_BODY, "misc/ripslop", 1, ATTN_IDLE);
// Do poisoning (if using new style poison)
if (tm.thing->PoisonDamage > 0 && tm.thing->PoisonDuration != INT_MIN)
{
P_PoisonMobj(thing, tm.thing, tm.thing->target, tm.thing->PoisonDamage, tm.thing->PoisonDuration, tm.thing->PoisonPeriod, tm.thing->PoisonDamageType);
}
damage = tm.thing->GetMissileDamage(3, 2);
int newdam = P_DamageMobj(thing, tm.thing, tm.thing->target, damage, tm.thing->DamageType);
if (!(tm.thing->flags3 & MF3_BLOODLESSIMPACT))
{
P_TraceBleed(newdam > 0 ? newdam : damage, thing, tm.thing);
}
if (thing->flags2 & MF2_PUSHABLE
&& !(tm.thing->flags2 & MF2_CANNOTPUSH))
{ // Push thing
if (thing->lastpush != tm.PushTime)
{
thing->velx += FixedMul(tm.thing->velx, thing->pushfactor);
thing->vely += FixedMul(tm.thing->vely, thing->pushfactor);
thing->lastpush = tm.PushTime;
}
}
}
spechit.Clear();
return true;
}
}
// Do poisoning (if using new style poison)
if (tm.thing->PoisonDamage > 0 && tm.thing->PoisonDuration != INT_MIN)
{
P_PoisonMobj(thing, tm.thing, tm.thing->target, tm.thing->PoisonDamage, tm.thing->PoisonDuration, tm.thing->PoisonPeriod, tm.thing->PoisonDamageType);
}
// Do damage
damage = tm.thing->GetMissileDamage((tm.thing->flags4 & MF4_STRIFEDAMAGE) ? 3 : 7, 1);
if ((damage > 0) || (tm.thing->flags6 & MF6_FORCEPAIN) || (tm.thing->flags7 & MF7_CAUSEPAIN))
{
int newdam = P_DamageMobj(thing, tm.thing, tm.thing->target, damage, tm.thing->DamageType);
if (damage > 0)
{
if ((tm.thing->flags5 & MF5_BLOODSPLATTER) &&
!(thing->flags & MF_NOBLOOD) &&
!(thing->flags2 & MF2_REFLECTIVE) &&
!(thing->flags2 & (MF2_INVULNERABLE | MF2_DORMANT)) &&
!(tm.thing->flags3 & MF3_BLOODLESSIMPACT) &&
(pr_checkthing() < 192))
{
P_BloodSplatter(tm.thing->x, tm.thing->y, tm.thing->z, thing);
}
if (!(tm.thing->flags3 & MF3_BLOODLESSIMPACT))
{
P_TraceBleed(newdam > 0 ? newdam : damage, thing, tm.thing);
}
}
}
else
{
P_GiveBody(thing, -damage);
}
if ((thing->flags7 & MF7_THRUREFLECT) && (thing->flags2 & MF2_REFLECTIVE) && (tm.thing->flags & MF_MISSILE))
{
if (tm.thing->flags2 & MF2_SEEKERMISSILE)
{
tm.thing->tracer = tm.thing->target;
}
tm.thing->target = thing;
return true;
}
return false; // don't traverse any more
}
if (thing->flags2 & MF2_PUSHABLE && !(tm.thing->flags2 & MF2_CANNOTPUSH))
{ // Push thing
if (thing->lastpush != tm.PushTime)
{
thing->velx += FixedMul(tm.thing->velx, thing->pushfactor);
thing->vely += FixedMul(tm.thing->vely, thing->pushfactor);
thing->lastpush = tm.PushTime;
}
}
solid = (thing->flags & MF_SOLID) &&
!(thing->flags & MF_NOCLIP) &&
((tm.thing->flags & MF_SOLID) || (tm.thing->flags6 & MF6_BLOCKEDBYSOLIDACTORS));
// Check for special pickup
if ((thing->flags & MF_SPECIAL) && (tm.thing->flags & MF_PICKUP)
// [RH] The next condition is to compensate for the extra height
// that gets added by P_CheckPosition() so that you cannot pick
// up things that are above your true height.
&& thing->z < tm.thing->z + tm.thing->height - tm.thing->MaxStepHeight)
{ // Can be picked up by tmthing
P_TouchSpecialThing(thing, tm.thing); // can remove thing
}
// killough 3/16/98: Allow non-solid moving objects to move through solid
// ones, by allowing the moving thing (tmthing) to move if it's non-solid,
// despite another solid thing being in the way.
// killough 4/11/98: Treat no-clipping things as not blocking
return !solid || unblocking;
// return !(thing->flags & MF_SOLID); // old code -- killough
}
/*
===============================================================================
MOVEMENT CLIPPING
===============================================================================
*/
//==========================================================================
//
// P_CheckPosition
// This is purely informative, nothing is modified
// (except things picked up and missile damage applied).
//
// in:
// a AActor (can be valid or invalid)
// a position to be checked
// (doesn't need to be related to the AActor->x,y)
//
// during:
// special things are touched if MF_PICKUP
// early out on solid lines?
//
// out:
// newsubsec
// floorz
// ceilingz
// tmdropoffz = the lowest point contacted (monsters won't move to a dropoff)
// speciallines[]
// numspeciallines
// AActor *BlockingMobj = pointer to thing that blocked position (NULL if not
// blocked, or blocked by a line).
//
//==========================================================================
bool P_CheckPosition(AActor *thing, fixed_t x, fixed_t y, FCheckPosition &tm, bool actorsonly)
{
sector_t *newsec;
AActor *thingblocker;
fixed_t realheight = thing->height;
tm.thing = thing;
tm.x = x;
tm.y = y;
newsec = P_PointInSector(x, y);
tm.ceilingline = thing->BlockingLine = NULL;
// The base floor / ceiling is from the subsector that contains the point.
// Any contacted lines the step closer together will adjust them.
tm.floorz = tm.dropoffz = newsec->floorplane.ZatPoint(x, y);
tm.ceilingz = newsec->ceilingplane.ZatPoint(x, y);
tm.floorpic = newsec->GetTexture(sector_t::floor);
tm.floorsector = newsec;
tm.ceilingpic = newsec->GetTexture(sector_t::ceiling);
tm.ceilingsector = newsec;
tm.touchmidtex = false;
tm.abovemidtex = false;
//Added by MC: Fill the tmsector.
tm.sector = newsec;
//Check 3D floors
if (!thing->IsNoClip2() && newsec->e->XFloor.ffloors.Size())
{
F3DFloor* rover;
fixed_t delta1;
fixed_t delta2;
int thingtop = thing->z + (thing->height == 0 ? 1 : thing->height);
for (unsigned i = 0; i<newsec->e->XFloor.ffloors.Size(); i++)
{
rover = newsec->e->XFloor.ffloors[i];
if (!(rover->flags & FF_SOLID) || !(rover->flags & FF_EXISTS)) continue;
fixed_t ff_bottom = rover->bottom.plane->ZatPoint(x, y);
fixed_t ff_top = rover->top.plane->ZatPoint(x, y);
delta1 = thing->z - (ff_bottom + ((ff_top - ff_bottom) / 2));
delta2 = thingtop - (ff_bottom + ((ff_top - ff_bottom) / 2));
if (ff_top > tm.floorz && abs(delta1) < abs(delta2))
{
tm.floorz = tm.dropoffz = ff_top;
tm.floorpic = *rover->top.texture;
}
if (ff_bottom < tm.ceilingz && abs(delta1) >= abs(delta2))
{
tm.ceilingz = ff_bottom;
tm.ceilingpic = *rover->bottom.texture;
}
}
}
validcount++;
spechit.Clear();
if ((thing->flags & MF_NOCLIP) && !(thing->flags & MF_SKULLFLY))
return true;
// Check things first, possibly picking things up.
thing->BlockingMobj = NULL;
thingblocker = NULL;
if (thing->player)
{ // [RH] Fake taller height to catch stepping up into things.
thing->height = realheight + thing->MaxStepHeight;
}
tm.stepthing = NULL;
FBoundingBox box(x, y, thing->radius);
{
FBlockThingsIterator it2(box);
AActor *th;
while ((th = it2.Next()))
{
if (!PIT_CheckThing(th, tm))
{ // [RH] If a thing can be stepped up on, we need to continue checking
// other things in the blocks and see if we hit something that is
// definitely blocking. Otherwise, we need to check the lines, or we
// could end up stuck inside a wall.
AActor *BlockingMobj = thing->BlockingMobj;
if (BlockingMobj == NULL || (i_compatflags & COMPATF_NO_PASSMOBJ))
{ // Thing slammed into something; don't let it move now.
thing->height = realheight;
return false;
}
else if (!BlockingMobj->player && !(thing->flags & (MF_FLOAT | MF_MISSILE | MF_SKULLFLY)) &&
BlockingMobj->z + BlockingMobj->height - thing->z <= thing->MaxStepHeight)
{
if (thingblocker == NULL ||
BlockingMobj->z > thingblocker->z)
{
thingblocker = BlockingMobj;
}
thing->BlockingMobj = NULL;
}
else if (thing->player &&
thing->z + thing->height - BlockingMobj->z <= thing->MaxStepHeight)
{
if (thingblocker)
{ // There is something to step up on. Return this thing as
// the blocker so that we don't step up.
thing->height = realheight;
return false;
}
// Nothing is blocking us, but this actor potentially could
// if there is something else to step on.
thing->BlockingMobj = NULL;
}
else
{ // Definitely blocking
thing->height = realheight;
return false;
}
}
}
}
// check lines
// [RH] We need to increment validcount again, because a function above may
// have already set some lines to equal the current validcount.
//
// Specifically, when DehackedPickup spawns a new item in its TryPickup()
// function, that new actor will set the lines around it to match validcount
// when it links itself into the world. If we just leave validcount alone,
// that will give the player the freedom to walk through walls at will near
// a pickup they cannot get, because their validcount will prevent them from
// being considered for collision with the player.
validcount++;
thing->BlockingMobj = NULL;
thing->height = realheight;
if (actorsonly || (thing->flags & MF_NOCLIP))
return (thing->BlockingMobj = thingblocker) == NULL;
FBlockLinesIterator it(box);
line_t *ld;
fixed_t thingdropoffz = tm.floorz;
//bool onthing = (thingdropoffz != tmdropoffz);
tm.floorz = tm.dropoffz;
bool good = true;
while ((ld = it.Next()))
{
good &= PIT_CheckLine(ld, box, tm);
}
if (!good)
{
return false;
}
if (tm.ceilingz - tm.floorz < thing->height)
{
return false;
}
if (tm.touchmidtex)
{
tm.dropoffz = tm.floorz;
}
else if (tm.stepthing != NULL)
{
tm.dropoffz = thingdropoffz;
}
return (thing->BlockingMobj = thingblocker) == NULL;
}
bool P_CheckPosition(AActor *thing, fixed_t x, fixed_t y, bool actorsonly)
{
FCheckPosition tm;
return P_CheckPosition(thing, x, y, tm, actorsonly);
}
//----------------------------------------------------------------------------
//
// FUNC P_TestMobjLocation
//
// Returns true if the mobj is not blocked by anything at its current
// location, otherwise returns false.
//
//----------------------------------------------------------------------------
bool P_TestMobjLocation(AActor *mobj)
{
ActorFlags flags;
flags = mobj->flags;
mobj->flags &= ~MF_PICKUP;
if (P_CheckPosition(mobj, mobj->x, mobj->y))
{ // XY is ok, now check Z
mobj->flags = flags;
if ((mobj->z < mobj->floorz) || (mobj->z + mobj->height > mobj->ceilingz))
{ // Bad Z
return false;
}
return true;
}
mobj->flags = flags;
return false;
}
//=============================================================================
//
// P_CheckOnmobj(AActor *thing)
//
// Checks if the new Z position is legal
//=============================================================================
AActor *P_CheckOnmobj(AActor *thing)
{
fixed_t oldz;
bool good;
AActor *onmobj;
oldz = thing->z;
P_FakeZMovement(thing);
good = P_TestMobjZ(thing, false, &onmobj);
thing->z = oldz;
return good ? NULL : onmobj;
}
//=============================================================================
//
// P_TestMobjZ
//
//=============================================================================
bool P_TestMobjZ(AActor *actor, bool quick, AActor **pOnmobj)
{
AActor *onmobj = NULL;
if (actor->flags & MF_NOCLIP)
{
if (pOnmobj) *pOnmobj = NULL;
return true;
}
FBlockThingsIterator it(FBoundingBox(actor->x, actor->y, actor->radius));
AActor *thing;
while ((thing = it.Next()))
{
if (!thing->intersects(actor))
{
continue;
}
if ((actor->flags2 | thing->flags2) & MF2_THRUACTORS)
{
continue;
}
if ((actor->flags6 & MF6_THRUSPECIES) && (thing->GetSpecies() == actor->GetSpecies()))
{
continue;
}
if (!(thing->flags & MF_SOLID))
{ // Can't hit thing
continue;
}
if (thing->flags & (MF_SPECIAL | MF_NOCLIP))
{ // [RH] Specials and noclippers don't block moves
continue;
}
if (thing->flags & (MF_CORPSE))
{ // Corpses need a few more checks
if (!(actor->flags & MF_ICECORPSE))
continue;
}
if (!(thing->flags4 & MF4_ACTLIKEBRIDGE) && (actor->flags & MF_SPECIAL))
{ // [RH] Only bridges block pickup items
continue;
}
if (thing == actor)
{ // Don't clip against self
continue;
}
if ((actor->flags & MF_MISSILE) && (thing == actor->target))
{ // Don't clip against whoever shot the missile.
continue;
}
if (actor->z > thing->z + thing->height)
{ // over thing
continue;
}
else if (actor->z + actor->height <= thing->z)
{ // under thing
continue;
}
else if (!quick && onmobj != NULL && thing->z + thing->height < onmobj->z + onmobj->height)
{ // something higher is in the way
continue;
}
onmobj = thing;
if (quick) break;
}
if (pOnmobj) *pOnmobj = onmobj;
return onmobj == NULL;
}
//=============================================================================
//
// P_FakeZMovement
//
// Fake the zmovement so that we can check if a move is legal
//=============================================================================
void P_FakeZMovement(AActor *mo)
{
//
// adjust height
//
mo->z += mo->velz;
if ((mo->flags&MF_FLOAT) && mo->target)
{ // float down towards target if too close
if (!(mo->flags & MF_SKULLFLY) && !(mo->flags & MF_INFLOAT))
{
fixed_t dist = P_AproxDistance(mo->x - mo->target->x, mo->y - mo->target->y);
fixed_t delta = (mo->target->z + (mo->height >> 1)) - mo->z;
if (delta < 0 && dist < -(delta * 3))
mo->z -= mo->FloatSpeed;
else if (delta > 0 && dist < (delta * 3))
mo->z += mo->FloatSpeed;
}
}
if (mo->player && mo->flags&MF_NOGRAVITY && (mo->z > mo->floorz) && !mo->IsNoClip2())
{
mo->z += finesine[(FINEANGLES / 80 * level.maptime)&FINEMASK] / 8;
}
//
// clip movement
//
if (mo->z <= mo->floorz)
{ // hit the floor
mo->z = mo->floorz;
}
if (mo->z + mo->height > mo->ceilingz)
{ // hit the ceiling
mo->z = mo->ceilingz - mo->height;
}
}
//===========================================================================
//
// CheckForPushSpecial
//
//===========================================================================
static void CheckForPushSpecial(line_t *line, int side, AActor *mobj, bool windowcheck)
{
if (line->special && !(mobj->flags6 & MF6_NOTRIGGER))
{
if (windowcheck && !(ib_compatflags & BCOMPATF_NOWINDOWCHECK) && line->backsector != NULL)
{ // Make sure this line actually blocks us and is not a window
// or similar construct we are standing inside of.
fixed_t fzt = line->frontsector->ceilingplane.ZatPoint(mobj->x, mobj->y);
fixed_t fzb = line->frontsector->floorplane.ZatPoint(mobj->x, mobj->y);
fixed_t bzt = line->backsector->ceilingplane.ZatPoint(mobj->x, mobj->y);
fixed_t bzb = line->backsector->floorplane.ZatPoint(mobj->x, mobj->y);
if (fzt >= mobj->z + mobj->height && bzt >= mobj->z + mobj->height &&
fzb <= mobj->z && bzb <= mobj->z)
{
// we must also check if some 3D floor in the backsector may be blocking
for (unsigned int i = 0; i<line->backsector->e->XFloor.ffloors.Size(); i++)
{
F3DFloor* rover = line->backsector->e->XFloor.ffloors[i];
if (!(rover->flags & FF_SOLID) || !(rover->flags & FF_EXISTS)) continue;
fixed_t ff_bottom = rover->bottom.plane->ZatPoint(mobj->x, mobj->y);
fixed_t ff_top = rover->top.plane->ZatPoint(mobj->x, mobj->y);
if (ff_bottom < mobj->z + mobj->height && ff_top > mobj->z)
{
goto isblocking;
}
}
return;
}
}
isblocking:
if (mobj->flags2 & MF2_PUSHWALL)
{
P_ActivateLine(line, mobj, side, SPAC_Push);
}
else if (mobj->flags2 & MF2_IMPACT)
{
if ((level.flags2 & LEVEL2_MISSILESACTIVATEIMPACT) ||
!(mobj->flags & MF_MISSILE) ||
(mobj->target == NULL))
{
P_ActivateLine(line, mobj, side, SPAC_Impact);
}
else
{
P_ActivateLine(line, mobj->target, side, SPAC_Impact);
}
}
}
}
//==========================================================================
//
// P_TryMove
// Attempt to move to a new position,
// crossing special lines unless MF_TELEPORT is set.
//
//==========================================================================
bool P_TryMove(AActor *thing, fixed_t x, fixed_t y,
int dropoff, // killough 3/15/98: allow dropoff as option
const secplane_t *onfloor, // [RH] Let P_TryMove keep the thing on the floor
FCheckPosition &tm,
bool missileCheck) // [GZ] Fired missiles ignore the drop-off test
{
fixed_t oldx;
fixed_t oldy;
fixed_t oldz;
int side;
int oldside;
line_t* ld;
sector_t* oldsec = thing->Sector; // [RH] for sector actions
sector_t* newsec;
tm.floatok = false;
oldz = thing->z;
if (onfloor)
{
thing->z = onfloor->ZatPoint(x, y);
}
thing->flags6 |= MF6_INTRYMOVE;
if (!P_CheckPosition(thing, x, y, tm))
{
AActor *BlockingMobj = thing->BlockingMobj;
// Solid wall or thing
if (!BlockingMobj || BlockingMobj->player || !thing->player)
{
goto pushline;
}
else
{
if (BlockingMobj->player || !thing->player)
{
goto pushline;
}
else if (BlockingMobj->z + BlockingMobj->height - thing->z
> thing->MaxStepHeight
|| (BlockingMobj->Sector->ceilingplane.ZatPoint(x, y)
- (BlockingMobj->z + BlockingMobj->height) < thing->height)
|| (tm.ceilingz - (BlockingMobj->z + BlockingMobj->height)
< thing->height))
{
goto pushline;
}
}
if (!(tm.thing->flags2 & MF2_PASSMOBJ) || (i_compatflags & COMPATF_NO_PASSMOBJ))
{
thing->z = oldz;
thing->flags6 &= ~MF6_INTRYMOVE;
return false;
}
}
if (thing->flags3 & MF3_FLOORHUGGER)
{
thing->z = tm.floorz;
}
else if (thing->flags3 & MF3_CEILINGHUGGER)
{
thing->z = tm.ceilingz - thing->height;
}
if (onfloor && tm.floorsector == thing->floorsector)
{
thing->z = tm.floorz;
}
if (!(thing->flags & MF_NOCLIP))
{
if (tm.ceilingz - tm.floorz < thing->height)
{
goto pushline; // doesn't fit
}
tm.floatok = true;
if (!(thing->flags & MF_TELEPORT)
&& tm.ceilingz - thing->z < thing->height
&& !(thing->flags3 & MF3_CEILINGHUGGER)
&& (!(thing->flags2 & MF2_FLY) || !(thing->flags & MF_NOGRAVITY)))
{
goto pushline; // mobj must lower itself to fit
}
if (thing->flags2 & MF2_FLY && thing->flags & MF_NOGRAVITY)
{
#if 1
if (thing->z + thing->height > tm.ceilingz)
goto pushline;
#else
// When flying, slide up or down blocking lines until the actor
// is not blocked.
if (thing->z + thing->height > tm.ceilingz)
{
thing->velz = -8 * FRACUNIT;
goto pushline;
}
else if (thing->z < tm.floorz && tm.floorz - tm.dropoffz > thing->MaxDropOffHeight)
{
thing->velz = 8 * FRACUNIT;
goto pushline;
}
#endif
}
if (!(thing->flags & MF_TELEPORT) && !(thing->flags3 & MF3_FLOORHUGGER))
{
if ((thing->flags & MF_MISSILE) && !(thing->flags6 & MF6_STEPMISSILE) && tm.floorz > thing->z)
{ // [RH] Don't let normal missiles climb steps
goto pushline;
}
if (tm.floorz - thing->z > thing->MaxStepHeight)
{ // too big a step up
goto pushline;
}
else if (thing->z < tm.floorz)
{ // [RH] Check to make sure there's nothing in the way for the step up
fixed_t savedz = thing->z;
bool good;
thing->z = tm.floorz;
good = P_TestMobjZ(thing);
thing->z = savedz;
if (!good)
{
goto pushline;
}
if (thing->flags6 & MF6_STEPMISSILE)
{
thing->z = tm.floorz;
// If moving down, cancel vertical component of the velocity
if (thing->velz < 0)
{
// If it's a bouncer, let it bounce off its new floor, too.
if (thing->BounceFlags & BOUNCE_Floors)
{
thing->FloorBounceMissile(tm.floorsector->floorplane);
}
else
{
thing->velz = 0;
}
}
}
}
}
// compatibility check: Doom originally did not allow monsters to cross dropoffs at all.
// If the compatibility flag is on, only allow this when the velocity comes from a scroller
if ((i_compatflags & COMPATF_CROSSDROPOFF) && !(thing->flags4 & MF4_SCROLLMOVE))
{
dropoff = false;
}
if (dropoff == 2 && // large jump down (e.g. dogs)
(tm.floorz - tm.dropoffz > 128 * FRACUNIT || thing->target == NULL || thing->target->z >tm.dropoffz))
{
dropoff = false;
}
// killough 3/15/98: Allow certain objects to drop off
if ((!dropoff && !(thing->flags & (MF_DROPOFF | MF_FLOAT | MF_MISSILE))) || (thing->flags5&MF5_NODROPOFF))
{
if (!(thing->flags5&MF5_AVOIDINGDROPOFF))
{
fixed_t floorz = tm.floorz;
// [RH] If the thing is standing on something, use its current z as the floorz.
// This is so that it does not walk off of things onto a drop off.
if (thing->flags2 & MF2_ONMOBJ)
{
floorz = MAX(thing->z, tm.floorz);
}
if (floorz - tm.dropoffz > thing->MaxDropOffHeight &&
!(thing->flags2 & MF2_BLASTED) && !missileCheck)
{ // Can't move over a dropoff unless it's been blasted
// [GZ] Or missile-spawned
thing->z = oldz;
thing->flags6 &= ~MF6_INTRYMOVE;
return false;
}
}
else
{
// special logic to move a monster off a dropoff
// this intentionally does not check for standing on things.
if (thing->floorz - tm.floorz > thing->MaxDropOffHeight ||
thing->dropoffz - tm.dropoffz > thing->MaxDropOffHeight)
{
thing->flags6 &= ~MF6_INTRYMOVE;
return false;
}
}
}
if (thing->flags2 & MF2_CANTLEAVEFLOORPIC
&& (tm.floorpic != thing->floorpic
|| tm.floorz - thing->z != 0))
{ // must stay within a sector of a certain floor type
thing->z = oldz;
thing->flags6 &= ~MF6_INTRYMOVE;
return false;
}
//Added by MC: To prevent bot from getting into dangerous sectors.
if (thing->player && thing->player->Bot != NULL && thing->flags & MF_SHOOTABLE)
{
if (tm.sector != thing->Sector
&& bglobal.IsDangerous(tm.sector))
{
thing->player->Bot->prev = thing->player->Bot->dest;
thing->player->Bot->dest = NULL;
thing->velx = 0;
thing->vely = 0;
thing->z = oldz;
thing->flags6 &= ~MF6_INTRYMOVE;
return false;
}
}
}
// [RH] Check status of eyes against fake floor/ceiling in case
// it slopes or the player's eyes are bobbing in and out.
bool oldAboveFakeFloor, oldAboveFakeCeiling;
fixed_t viewheight;
viewheight = thing->player ? thing->player->viewheight : thing->height / 2;
oldAboveFakeFloor = oldAboveFakeCeiling = false; // pacify GCC
if (oldsec->heightsec)
{
fixed_t eyez = oldz + viewheight;
oldAboveFakeFloor = eyez > oldsec->heightsec->floorplane.ZatPoint(thing->x, thing->y);
oldAboveFakeCeiling = eyez > oldsec->heightsec->ceilingplane.ZatPoint(thing->x, thing->y);
}
// Borrowed from MBF:
if (thing->BounceFlags & BOUNCE_MBF && // killough 8/13/98
!(thing->flags & (MF_MISSILE | MF_NOGRAVITY)) &&
!thing->IsSentient() && tm.floorz - thing->z > 16 * FRACUNIT)
{ // too big a step up for MBF bouncers under gravity
thing->flags6 &= ~MF6_INTRYMOVE;
return false;
}
// the move is ok, so link the thing into its new position
thing->UnlinkFromWorld();
oldx = thing->x;
oldy = thing->y;
thing->floorz = tm.floorz;
thing->ceilingz = tm.ceilingz;
thing->dropoffz = tm.dropoffz; // killough 11/98: keep track of dropoffs
thing->floorpic = tm.floorpic;
thing->floorsector = tm.floorsector;
thing->ceilingpic = tm.ceilingpic;
thing->ceilingsector = tm.ceilingsector;
thing->x = x;
thing->y = y;
thing->LinkToWorld();
if (thing->flags2 & MF2_FLOORCLIP)
{
thing->AdjustFloorClip();
}
// if any special lines were hit, do the effect
if (!(thing->flags & (MF_TELEPORT | MF_NOCLIP)))
{
while (spechit.Pop(ld))
{
// see if the line was crossed
side = P_PointOnLineSide(thing->x, thing->y, ld);
oldside = P_PointOnLineSide(oldx, oldy, ld);
if (side != oldside && ld->special && !(thing->flags6 & MF6_NOTRIGGER))
{
if (thing->player && (thing->player->cheats & CF_PREDICTING))
{
P_PredictLine(ld, thing, oldside, SPAC_Cross);
}
else if (thing->player)
{
P_ActivateLine(ld, thing, oldside, SPAC_Cross);
}
else if (thing->flags2 & MF2_MCROSS)
{
P_ActivateLine(ld, thing, oldside, SPAC_MCross);
}
else if (thing->flags2 & MF2_PCROSS)
{
P_ActivateLine(ld, thing, oldside, SPAC_PCross);
}
else if ((ld->special == Teleport ||
ld->special == Teleport_NoFog ||
ld->special == Teleport_Line))
{ // [RH] Just a little hack for BOOM compatibility
P_ActivateLine(ld, thing, oldside, SPAC_MCross);
}
else
{
P_ActivateLine(ld, thing, oldside, SPAC_AnyCross);
}
}
}
}
// [RH] Don't activate anything if just predicting
if (thing->player && (thing->player->cheats & CF_PREDICTING))
{
thing->flags6 &= ~MF6_INTRYMOVE;
return true;
}
// [RH] Check for crossing fake floor/ceiling
newsec = thing->Sector;
if (newsec->heightsec && oldsec->heightsec && newsec->SecActTarget)
{
const sector_t *hs = newsec->heightsec;
fixed_t eyez = thing->z + viewheight;
fixed_t fakez = hs->floorplane.ZatPoint(x, y);
if (!oldAboveFakeFloor && eyez > fakez)
{ // View went above fake floor
newsec->SecActTarget->TriggerAction(thing, SECSPAC_EyesSurface);
}
else if (oldAboveFakeFloor && eyez <= fakez)
{ // View went below fake floor
newsec->SecActTarget->TriggerAction(thing, SECSPAC_EyesDive);
}
if (!(hs->MoreFlags & SECF_FAKEFLOORONLY))
{
fakez = hs->ceilingplane.ZatPoint(x, y);
if (!oldAboveFakeCeiling && eyez > fakez)
{ // View went above fake ceiling
newsec->SecActTarget->TriggerAction(thing, SECSPAC_EyesAboveC);
}
else if (oldAboveFakeCeiling && eyez <= fakez)
{ // View went below fake ceiling
newsec->SecActTarget->TriggerAction(thing, SECSPAC_EyesBelowC);
}
}
}
// [RH] If changing sectors, trigger transitions
thing->CheckSectorTransition(oldsec);
thing->flags6 &= ~MF6_INTRYMOVE;
return true;
pushline:
thing->flags6 &= ~MF6_INTRYMOVE;
// [RH] Don't activate anything if just predicting
if (thing->player && (thing->player->cheats & CF_PREDICTING))
{
return false;
}
thing->z = oldz;
if (!(thing->flags&(MF_TELEPORT | MF_NOCLIP)))
{
int numSpecHitTemp;
if (tm.thing->flags2 & MF2_BLASTED)
{
P_DamageMobj(tm.thing, NULL, NULL, tm.thing->Mass >> 5, NAME_Melee);
}
numSpecHitTemp = (int)spechit.Size();
while (numSpecHitTemp > 0)
{
// see which lines were pushed
ld = spechit[--numSpecHitTemp];
side = P_PointOnLineSide(thing->x, thing->y, ld);
CheckForPushSpecial(ld, side, thing, true);
}
}
return false;
}
bool P_TryMove(AActor *thing, fixed_t x, fixed_t y,
int dropoff, // killough 3/15/98: allow dropoff as option
const secplane_t *onfloor) // [RH] Let P_TryMove keep the thing on the floor
{
FCheckPosition tm;
return P_TryMove(thing, x, y, dropoff, onfloor, tm);
}
//==========================================================================
//
// P_CheckMove
// Similar to P_TryMove but doesn't actually move the actor. Used for polyobject crushing
//
//==========================================================================
bool P_CheckMove(AActor *thing, fixed_t x, fixed_t y)
{
FCheckPosition tm;
fixed_t newz = thing->z;
if (!P_CheckPosition(thing, x, y, tm))
{
return false;
}
if (thing->flags3 & MF3_FLOORHUGGER)
{
newz = tm.floorz;
}
else if (thing->flags3 & MF3_CEILINGHUGGER)
{
newz = tm.ceilingz - thing->height;
}
if (!(thing->flags & MF_NOCLIP))
{
if (tm.ceilingz - tm.floorz < thing->height)
{
return false;
}
if (!(thing->flags & MF_TELEPORT)
&& tm.ceilingz - newz < thing->height
&& !(thing->flags3 & MF3_CEILINGHUGGER)
&& (!(thing->flags2 & MF2_FLY) || !(thing->flags & MF_NOGRAVITY)))
{
return false;
}
if (thing->flags2 & MF2_FLY && thing->flags & MF_NOGRAVITY)
{
if (thing->z + thing->height > tm.ceilingz)
return false;
}
if (!(thing->flags & MF_TELEPORT) && !(thing->flags3 & MF3_FLOORHUGGER))
{
if (tm.floorz - newz > thing->MaxStepHeight)
{ // too big a step up
return false;
}
else if ((thing->flags & MF_MISSILE) && !(thing->flags6 & MF6_STEPMISSILE) && tm.floorz > newz)
{ // [RH] Don't let normal missiles climb steps
return false;
}
else if (newz < tm.floorz)
{ // [RH] Check to make sure there's nothing in the way for the step up
fixed_t savedz = thing->z;
thing->z = newz = tm.floorz;
bool good = P_TestMobjZ(thing);
thing->z = savedz;
if (!good)
{
return false;
}
}
}
if (thing->flags2 & MF2_CANTLEAVEFLOORPIC
&& (tm.floorpic != thing->floorpic
|| tm.floorz - newz != 0))
{ // must stay within a sector of a certain floor type
return false;
}
}
return true;
}
//==========================================================================
//
// SLIDE MOVE
// Allows the player to slide along any angled walls.
//
//==========================================================================
struct FSlide
{
fixed_t bestslidefrac;
fixed_t secondslidefrac;
line_t* bestslideline;
line_t* secondslideline;
AActor* slidemo;
fixed_t tmxmove;
fixed_t tmymove;
void HitSlideLine(line_t *ld);
void SlideTraverse(fixed_t startx, fixed_t starty, fixed_t endx, fixed_t endy);
void SlideMove(AActor *mo, fixed_t tryx, fixed_t tryy, int numsteps);
// The bouncing code uses the same data structure
bool BounceTraverse(fixed_t startx, fixed_t starty, fixed_t endx, fixed_t endy);
bool BounceWall(AActor *mo);
};
//==========================================================================
//
// P_HitSlideLine
// Adjusts the xmove / ymove
// so that the next move will slide along the wall.
// If the floor is icy, then you can bounce off a wall. // phares
//
//==========================================================================
void FSlide::HitSlideLine(line_t* ld)
{
int side;
angle_t lineangle;
angle_t moveangle;
angle_t deltaangle;
fixed_t movelen;
bool icyfloor; // is floor icy? // phares
// |
// Under icy conditions, if the angle of approach to the wall // V
// is more than 45 degrees, then you'll bounce and lose half
// your velocity. If less than 45 degrees, you'll slide along
// the wall. 45 is arbitrary and is believable.
// Check for the special cases of horz or vert walls.
// killough 10/98: only bounce if hit hard (prevents wobbling)
icyfloor =
(P_AproxDistance(tmxmove, tmymove) > 4 * FRACUNIT) &&
var_friction && // killough 8/28/98: calc friction on demand
slidemo->z <= slidemo->floorz &&
P_GetFriction(slidemo, NULL) > ORIG_FRICTION;
if (ld->dx == 0)
{ // ST_VERTICAL
if (icyfloor && (abs(tmxmove) > abs(tmymove)))
{
tmxmove = -tmxmove / 2; // absorb half the velocity
tmymove /= 2;
if (slidemo->player && slidemo->health > 0 && !(slidemo->player->cheats & CF_PREDICTING))
{
S_Sound(slidemo, CHAN_VOICE, "*grunt", 1, ATTN_IDLE); // oooff!// ^
}
} // |
else // phares
tmxmove = 0; // no more movement in the X direction
return;
}
if (ld->dy == 0)
{ // ST_HORIZONTAL
if (icyfloor && (abs(tmymove) > abs(tmxmove)))
{
tmxmove /= 2; // absorb half the velocity
tmymove = -tmymove / 2;
if (slidemo->player && slidemo->health > 0 && !(slidemo->player->cheats & CF_PREDICTING))
{
S_Sound(slidemo, CHAN_VOICE, "*grunt", 1, ATTN_IDLE); // oooff!
}
}
else
tmymove = 0; // no more movement in the Y direction
return;
}
// The wall is angled. Bounce if the angle of approach is // phares
// less than 45 degrees. // phares
side = P_PointOnLineSide(slidemo->x, slidemo->y, ld);
lineangle = R_PointToAngle2(0, 0, ld->dx, ld->dy);
if (side == 1)
lineangle += ANG180;
moveangle = R_PointToAngle2(0, 0, tmxmove, tmymove);
moveangle += 10; // prevents sudden path reversal due to // phares
// rounding error // |
deltaangle = moveangle - lineangle; // V
movelen = P_AproxDistance(tmxmove, tmymove);
if (icyfloor && (deltaangle > ANG45) && (deltaangle < ANG90 + ANG45))
{
moveangle = lineangle - deltaangle;
movelen /= 2; // absorb
if (slidemo->player && slidemo->health > 0 && !(slidemo->player->cheats & CF_PREDICTING))
{
S_Sound(slidemo, CHAN_VOICE, "*grunt", 1, ATTN_IDLE); // oooff!
}
moveangle >>= ANGLETOFINESHIFT;
tmxmove = FixedMul(movelen, finecosine[moveangle]);
tmymove = FixedMul(movelen, finesine[moveangle]);
} // ^
else // |
{ // phares
// Doom's original algorithm here does not work well due to imprecisions of the sine table.
// However, keep it active if the wallrunning compatibility flag is on
if (i_compatflags & COMPATF_WALLRUN)
{
fixed_t newlen;
if (deltaangle > ANG180)
deltaangle += ANG180;
// I_Error ("SlideLine: ang>ANG180");
lineangle >>= ANGLETOFINESHIFT;
deltaangle >>= ANGLETOFINESHIFT;
newlen = FixedMul(movelen, finecosine[deltaangle]);
tmxmove = FixedMul(newlen, finecosine[lineangle]);
tmymove = FixedMul(newlen, finesine[lineangle]);
}
else
{
divline_t dll, dlv;
fixed_t inter1, inter2, inter3;
P_MakeDivline(ld, &dll);
dlv.x = slidemo->x;
dlv.y = slidemo->y;
dlv.dx = dll.dy;
dlv.dy = -dll.dx;
inter1 = P_InterceptVector(&dll, &dlv);
dlv.dx = tmxmove;
dlv.dy = tmymove;
inter2 = P_InterceptVector(&dll, &dlv);
inter3 = P_InterceptVector(&dlv, &dll);
if (inter3 != 0)
{
tmxmove = Scale(inter2 - inter1, dll.dx, inter3);
tmymove = Scale(inter2 - inter1, dll.dy, inter3);
}
else
{
tmxmove = tmymove = 0;
}
}
} // phares
}
//==========================================================================
//
// PTR_SlideTraverse
//
//==========================================================================
void FSlide::SlideTraverse(fixed_t startx, fixed_t starty, fixed_t endx, fixed_t endy)
{
FLineOpening open;
FPathTraverse it(startx, starty, endx, endy, PT_ADDLINES);
intercept_t *in;
while ((in = it.Next()))
{
line_t* li;
if (!in->isaline)
{
// should never happen
Printf("PTR_SlideTraverse: not a line?");
continue;
}
li = in->d.line;
if (!(li->flags & ML_TWOSIDED) || !li->backsector)
{
if (P_PointOnLineSide(slidemo->x, slidemo->y, li))
{
// don't hit the back side
continue;
}
goto isblocking;
}
if (li->flags & (ML_BLOCKING | ML_BLOCKEVERYTHING))
{
goto isblocking;
}
if (li->flags & ML_BLOCK_PLAYERS && slidemo->player != NULL)
{
goto isblocking;
}
if (li->flags & ML_BLOCKMONSTERS && !((slidemo->flags3 & MF3_NOBLOCKMONST)
|| ((i_compatflags & COMPATF_NOBLOCKFRIENDS) && (slidemo->flags & MF_FRIENDLY))))
{
goto isblocking;
}
// set openrange, opentop, openbottom
P_LineOpening(open, slidemo, li, it.Trace().x + FixedMul(it.Trace().dx, in->frac),
it.Trace().y + FixedMul(it.Trace().dy, in->frac));
if (open.range < slidemo->height)
goto isblocking; // doesn't fit
if (open.top - slidemo->z < slidemo->height)
goto isblocking; // mobj is too high
if (open.bottom - slidemo->z > slidemo->MaxStepHeight)
{
goto isblocking; // too big a step up
}
else if (slidemo->z < open.bottom)
{ // [RH] Check to make sure there's nothing in the way for the step up
fixed_t savedz = slidemo->z;
slidemo->z = open.bottom;
bool good = P_TestMobjZ(slidemo);
slidemo->z = savedz;
if (!good)
{
goto isblocking;
}
}
// this line doesn't block movement
continue;
// the line does block movement,
// see if it is closer than best so far
isblocking:
if (in->frac < bestslidefrac)
{
secondslidefrac = bestslidefrac;
secondslideline = bestslideline;
bestslidefrac = in->frac;
bestslideline = li;
}
return; // stop
}
}
//==========================================================================
//
// P_SlideMove
//
// The velx / vely move is bad, so try to slide along a wall.
//
// Find the first line hit, move flush to it, and slide along it
//
// This is a kludgy mess.
//
//==========================================================================
void FSlide::SlideMove(AActor *mo, fixed_t tryx, fixed_t tryy, int numsteps)
{
fixed_t leadx, leady;
fixed_t trailx, traily;
fixed_t newx, newy;
fixed_t xmove, ymove;
const secplane_t * walkplane;
int hitcount;
hitcount = 3;
slidemo = mo;
if (mo->player && mo->player->mo == mo && mo->reactiontime > 0)
return; // player coming right out of a teleporter.
retry:
if (!--hitcount)
goto stairstep; // don't loop forever
// trace along the three leading corners
if (tryx > 0)
{
leadx = mo->x + mo->radius;
trailx = mo->x - mo->radius;
}
else
{
leadx = mo->x - mo->radius;
trailx = mo->x + mo->radius;
}
if (tryy > 0)
{
leady = mo->y + mo->radius;
traily = mo->y - mo->radius;
}
else
{
leady = mo->y - mo->radius;
traily = mo->y + mo->radius;
}
bestslidefrac = FRACUNIT + 1;
SlideTraverse(leadx, leady, leadx + tryx, leady + tryy);
SlideTraverse(trailx, leady, trailx + tryx, leady + tryy);
SlideTraverse(leadx, traily, leadx + tryx, traily + tryy);
// move up to the wall
if (bestslidefrac == FRACUNIT + 1)
{
// the move must have hit the middle, so stairstep
stairstep:
// killough 3/15/98: Allow objects to drop off ledges
xmove = 0, ymove = tryy;
walkplane = P_CheckSlopeWalk(mo, xmove, ymove);
if (!P_TryMove(mo, mo->x + xmove, mo->y + ymove, true, walkplane))
{
xmove = tryx, ymove = 0;
walkplane = P_CheckSlopeWalk(mo, xmove, ymove);
P_TryMove(mo, mo->x + xmove, mo->y + ymove, true, walkplane);
}
return;
}
// fudge a bit to make sure it doesn't hit
bestslidefrac -= FRACUNIT / 32;
if (bestslidefrac > 0)
{
newx = FixedMul(tryx, bestslidefrac);
newy = FixedMul(tryy, bestslidefrac);
// [BL] We need to abandon this function if we end up going through a teleporter
const fixed_t startvelx = mo->velx;
const fixed_t startvely = mo->vely;
// killough 3/15/98: Allow objects to drop off ledges
if (!P_TryMove(mo, mo->x + newx, mo->y + newy, true))
goto stairstep;
if (mo->velx != startvelx || mo->vely != startvely)
return;
}
// Now continue along the wall.
bestslidefrac = FRACUNIT - (bestslidefrac + FRACUNIT / 32); // remainder
if (bestslidefrac > FRACUNIT)
bestslidefrac = FRACUNIT;
else if (bestslidefrac <= 0)
return;
tryx = tmxmove = FixedMul(tryx, bestslidefrac);
tryy = tmymove = FixedMul(tryy, bestslidefrac);
HitSlideLine(bestslideline); // clip the moves
mo->velx = tmxmove * numsteps;
mo->vely = tmymove * numsteps;
// killough 10/98: affect the bobbing the same way (but not voodoo dolls)
if (mo->player && mo->player->mo == mo)
{
if (abs(mo->player->velx) > abs(mo->velx))
mo->player->velx = mo->velx;
if (abs(mo->player->vely) > abs(mo->vely))
mo->player->vely = mo->vely;
}
walkplane = P_CheckSlopeWalk(mo, tmxmove, tmymove);
// killough 3/15/98: Allow objects to drop off ledges
if (!P_TryMove(mo, mo->x + tmxmove, mo->y + tmymove, true, walkplane))
{
goto retry;
}
}
void P_SlideMove(AActor *mo, fixed_t tryx, fixed_t tryy, int numsteps)
{
FSlide slide;
slide.SlideMove(mo, tryx, tryy, numsteps);
}
//============================================================================
//
// P_CheckSlopeWalk
//
//============================================================================
const secplane_t * P_CheckSlopeWalk(AActor *actor, fixed_t &xmove, fixed_t &ymove)
{
static secplane_t copyplane;
if (actor->flags & MF_NOGRAVITY)
{
return NULL;
}
const secplane_t *plane = &actor->floorsector->floorplane;
fixed_t planezhere = plane->ZatPoint(actor->x, actor->y);
for (unsigned int i = 0; i<actor->floorsector->e->XFloor.ffloors.Size(); i++)
{
F3DFloor * rover = actor->floorsector->e->XFloor.ffloors[i];
if (!(rover->flags & FF_SOLID) || !(rover->flags & FF_EXISTS)) continue;
fixed_t thisplanez = rover->top.plane->ZatPoint(actor->x, actor->y);
if (thisplanez>planezhere && thisplanez <= actor->z + actor->MaxStepHeight)
{
copyplane = *rover->top.plane;
if (copyplane.c<0) copyplane.FlipVert();
plane = &copyplane;
planezhere = thisplanez;
}
}
if (actor->floorsector != actor->Sector)
{
for (unsigned int i = 0; i<actor->Sector->e->XFloor.ffloors.Size(); i++)
{
F3DFloor * rover = actor->Sector->e->XFloor.ffloors[i];
if (!(rover->flags & FF_SOLID) || !(rover->flags & FF_EXISTS)) continue;
fixed_t thisplanez = rover->top.plane->ZatPoint(actor->x, actor->y);
if (thisplanez>planezhere && thisplanez <= actor->z + actor->MaxStepHeight)
{
copyplane = *rover->top.plane;
if (copyplane.c<0) copyplane.FlipVert();
plane = &copyplane;
planezhere = thisplanez;
}
}
}
if (actor->floorsector != actor->Sector)
{
// this additional check prevents sliding on sloped dropoffs
if (planezhere>actor->floorz + 4 * FRACUNIT)
return NULL;
}
if (actor->z - planezhere > FRACUNIT)
{ // not on floor
return NULL;
}
if ((plane->a | plane->b) != 0)
{
fixed_t destx, desty;
fixed_t t;
destx = actor->x + xmove;
desty = actor->y + ymove;
t = TMulScale16(plane->a, destx, plane->b, desty, plane->c, actor->z) + plane->d;
if (t < 0)
{ // Desired location is behind (below) the plane
// (i.e. Walking up the plane)
if (plane->c < STEEPSLOPE)
{ // Can't climb up slopes of ~45 degrees or more
if (actor->flags & MF_NOCLIP)
{
return (actor->floorsector == actor->Sector) ? plane : NULL;
}
else
{
const msecnode_t *node;
bool dopush = true;
if (plane->c > STEEPSLOPE * 2 / 3)
{
for (node = actor->touching_sectorlist; node; node = node->m_tnext)
{
const sector_t *sec = node->m_sector;
if (sec->floorplane.c >= STEEPSLOPE)
{
if (sec->floorplane.ZatPoint(destx, desty) >= actor->z - actor->MaxStepHeight)
{
dopush = false;
break;
}
}
}
}
if (dopush)
{
xmove = actor->velx = plane->a * 2;
ymove = actor->vely = plane->b * 2;
}
return (actor->floorsector == actor->Sector) ? plane : NULL;
}
}
// Slide the desired location along the plane's normal
// so that it lies on the plane's surface
destx -= FixedMul(plane->a, t);
desty -= FixedMul(plane->b, t);
xmove = destx - actor->x;
ymove = desty - actor->y;
return (actor->floorsector == actor->Sector) ? plane : NULL;
}
else if (t > 0)
{ // Desired location is in front of (above) the plane
if (planezhere == actor->z)
{ // Actor's current spot is on/in the plane, so walk down it
// Same principle as walking up, except reversed
destx += FixedMul(plane->a, t);
desty += FixedMul(plane->b, t);
xmove = destx - actor->x;
ymove = desty - actor->y;
return (actor->floorsector == actor->Sector) ? plane : NULL;
}
}
}
return NULL;
}
//============================================================================
//
// PTR_BounceTraverse
//
//============================================================================
bool FSlide::BounceTraverse(fixed_t startx, fixed_t starty, fixed_t endx, fixed_t endy)
{
FLineOpening open;
FPathTraverse it(startx, starty, endx, endy, PT_ADDLINES);
intercept_t *in;
while ((in = it.Next()))
{
line_t *li;
if (!in->isaline)
{
Printf("PTR_BounceTraverse: not a line?");
continue;
}
li = in->d.line;
assert(((size_t)li - (size_t)lines) % sizeof(line_t) == 0);
if (li->flags & ML_BLOCKEVERYTHING)
{
goto bounceblocking;
}
if (!(li->flags&ML_TWOSIDED) || !li->backsector)
{
if (P_PointOnLineSide(slidemo->x, slidemo->y, li))
continue; // don't hit the back side
goto bounceblocking;
}
P_LineOpening(open, slidemo, li, it.Trace().x + FixedMul(it.Trace().dx, in->frac),
it.Trace().y + FixedMul(it.Trace().dy, in->frac)); // set openrange, opentop, openbottom
if (open.range < slidemo->height)
goto bounceblocking; // doesn't fit
if (open.top - slidemo->z < slidemo->height)
goto bounceblocking; // mobj is too high
if (open.bottom > slidemo->z)
goto bounceblocking; // mobj is too low
continue; // this line doesn't block movement
// the line does block movement, see if it is closer than best so far
bounceblocking:
if (in->frac < bestslidefrac)
{
secondslidefrac = bestslidefrac;
secondslideline = bestslideline;
bestslidefrac = in->frac;
bestslideline = li;
}
return false; // stop
}
return true;
}
//============================================================================
//
// P_BounceWall
//
//============================================================================
bool FSlide::BounceWall(AActor *mo)
{
fixed_t leadx, leady;
int side;
angle_t lineangle, moveangle, deltaangle;
fixed_t movelen;
line_t *line;
if (!(mo->BounceFlags & BOUNCE_Walls))
{
return false;
}
slidemo = mo;
//
// trace along the three leading corners
//
if (mo->velx > 0)
{
leadx = mo->x + mo->radius;
}
else
{
leadx = mo->x - mo->radius;
}
if (mo->vely > 0)
{
leady = mo->y + mo->radius;
}
else
{
leady = mo->y - mo->radius;
}
bestslidefrac = FRACUNIT + 1;
bestslideline = mo->BlockingLine;
if (BounceTraverse(leadx, leady, leadx + mo->velx, leady + mo->vely) && mo->BlockingLine == NULL)
{ // Could not find a wall, so bounce off the floor/ceiling instead.
fixed_t floordist = mo->z - mo->floorz;
fixed_t ceildist = mo->ceilingz - mo->z;
if (floordist <= ceildist)
{
mo->FloorBounceMissile(mo->Sector->floorplane);
return true;
}
else
{
mo->FloorBounceMissile(mo->Sector->ceilingplane);
return true;
}
}
line = bestslideline;
if (line->special == Line_Horizon)
{
mo->SeeSound = 0; // it might make a sound otherwise
mo->Destroy();
return true;
}
// The amount of bounces is limited
if (mo->bouncecount>0 && --mo->bouncecount == 0)
{
if (mo->flags & MF_MISSILE)
P_ExplodeMissile(mo, line, NULL);
else
mo->Die(NULL, NULL);
return true;
}
side = P_PointOnLineSide(mo->x, mo->y, line);
lineangle = R_PointToAngle2(0, 0, line->dx, line->dy);
if (side == 1)
{
lineangle += ANG180;
}
moveangle = R_PointToAngle2(0, 0, mo->velx, mo->vely);
deltaangle = (2 * lineangle) - moveangle;
mo->angle = deltaangle;
deltaangle >>= ANGLETOFINESHIFT;
movelen = fixed_t(sqrt(double(mo->velx)*mo->velx + double(mo->vely)*mo->vely));
movelen = FixedMul(movelen, mo->wallbouncefactor);
FBoundingBox box(mo->x, mo->y, mo->radius);
if (box.BoxOnLineSide(line) == -1)
{
mo->SetOrigin(mo->x + FixedMul(mo->radius,
finecosine[deltaangle]), mo->y + FixedMul(mo->radius, finesine[deltaangle]), mo->z);
}
if (movelen < FRACUNIT)
{
movelen = 2 * FRACUNIT;
}
mo->velx = FixedMul(movelen, finecosine[deltaangle]);
mo->vely = FixedMul(movelen, finesine[deltaangle]);
if (mo->BounceFlags & BOUNCE_UseBounceState)
{
FState *bouncestate = mo->FindState(NAME_Bounce, NAME_Wall);
if (bouncestate != NULL)
{
mo->SetState(bouncestate);
}
}
return true;
}
bool P_BounceWall(AActor *mo)
{
FSlide slide;
return slide.BounceWall(mo);
}
//==========================================================================
//
//
//
//==========================================================================
extern FRandom pr_bounce;
bool P_BounceActor(AActor *mo, AActor *BlockingMobj, bool ontop)
{
//Don't go through all of this if the actor is reflective and wants things to pass through them.
if (BlockingMobj && ((BlockingMobj->flags2 & MF2_REFLECTIVE) && (BlockingMobj->flags7 & MF7_THRUREFLECT))) return true;
if (mo && BlockingMobj && ((mo->BounceFlags & BOUNCE_AllActors)
|| ((mo->flags & MF_MISSILE) && (!(mo->flags2 & MF2_RIP)
|| (BlockingMobj->flags5 & MF5_DONTRIP)
|| ((mo->flags6 & MF6_NOBOSSRIP) && (BlockingMobj->flags2 & MF2_BOSS))) && (BlockingMobj->flags2 & MF2_REFLECTIVE))
|| ((BlockingMobj->player == NULL) && (!(BlockingMobj->flags3 & MF3_ISMONSTER)))))
{
if (mo->bouncecount > 0 && --mo->bouncecount == 0) return false;
if (mo->flags7 & MF7_HITTARGET) mo->target = BlockingMobj;
if (mo->flags7 & MF7_HITMASTER) mo->master = BlockingMobj;
if (mo->flags7 & MF7_HITTRACER) mo->tracer = BlockingMobj;
if (!ontop)
{
fixed_t speed;
angle_t angle = R_PointToAngle2(BlockingMobj->x,BlockingMobj->y, mo->x, mo->y) + ANGLE_1*((pr_bounce() % 16) - 8);
speed = P_AproxDistance(mo->velx, mo->vely);
speed = FixedMul(speed, mo->wallbouncefactor); // [GZ] was 0.75, using wallbouncefactor seems more consistent
mo->angle = angle;
angle >>= ANGLETOFINESHIFT;
mo->velx = FixedMul(speed, finecosine[angle]);
mo->vely = FixedMul(speed, finesine[angle]);
mo->PlayBounceSound(true);
if (mo->BounceFlags & BOUNCE_UseBounceState)
{
FName names[] = { NAME_Bounce, NAME_Actor, NAME_Creature };
FState *bouncestate;
int count = 2;
if ((BlockingMobj->flags & MF_SHOOTABLE) && !(BlockingMobj->flags & MF_NOBLOOD))
{
count = 3;
}
bouncestate = mo->FindState(count, names);
if (bouncestate != NULL)
{
mo->SetState(bouncestate);
}
}
}
else
{
fixed_t dot = mo->velz;
if (mo->BounceFlags & (BOUNCE_HereticType | BOUNCE_MBF))
{
mo->velz -= MulScale15(FRACUNIT, dot);
if (!(mo->BounceFlags & BOUNCE_MBF)) // Heretic projectiles die, MBF projectiles don't.
{
mo->flags |= MF_INBOUNCE;
mo->SetState(mo->FindState(NAME_Death));
mo->flags &= ~MF_INBOUNCE;
return false;
}
else
{
mo->velz = FixedMul(mo->velz, mo->bouncefactor);
}
}
else // Don't run through this for MBF-style bounces
{
// The reflected velocity keeps only about 70% of its original speed
mo->velz = FixedMul(mo->velz - MulScale15(FRACUNIT, dot), mo->bouncefactor);
}
mo->PlayBounceSound(true);
if (mo->BounceFlags & BOUNCE_MBF) // Bring it to rest below a certain speed
{
if (abs(mo->velz) < (fixed_t)(mo->Mass * mo->GetGravity() / 64))
mo->velz = 0;
}
else if (mo->BounceFlags & (BOUNCE_AutoOff | BOUNCE_AutoOffFloorOnly))
{
if (!(mo->flags & MF_NOGRAVITY) && (mo->velz < 3 * FRACUNIT))
mo->BounceFlags &= ~BOUNCE_TypeMask;
}
}
return true;
}
return false;
}
//============================================================================
//
// Aiming
//
//============================================================================
struct aim_t
{
fixed_t aimpitch;
fixed_t attackrange;
fixed_t shootz; // Height if not aiming up or down
AActor* shootthing;
AActor* friender; // actor to check friendliness again
fixed_t toppitch, bottompitch;
AActor * linetarget;
AActor * thing_friend, *thing_other;
angle_t pitch_friend, pitch_other;
int flags;
sector_t * lastsector;
secplane_t * lastfloorplane;
secplane_t * lastceilingplane;
bool crossedffloors;
bool AimTraverse3DFloors(const divline_t &trace, intercept_t * in);
void AimTraverse(fixed_t startx, fixed_t starty, fixed_t endx, fixed_t endy, AActor *target = NULL);
};
//============================================================================
//
// AimTraverse3DFloors
//
//============================================================================
bool aim_t::AimTraverse3DFloors(const divline_t &trace, intercept_t * in)
{
sector_t * nextsector;
secplane_t * nexttopplane, *nextbottomplane;
line_t * li = in->d.line;
nextsector = NULL;
nexttopplane = nextbottomplane = NULL;
if (li->backsector == NULL) return true; // shouldn't really happen but crashed once for me...
if (li->frontsector->e->XFloor.ffloors.Size() || li->backsector->e->XFloor.ffloors.Size())
{
int frontflag;
F3DFloor* rover;
int highpitch, lowpitch;
fixed_t trX = trace.x + FixedMul(trace.dx, in->frac);
fixed_t trY = trace.y + FixedMul(trace.dy, in->frac);
fixed_t dist = FixedMul(attackrange, in->frac);
frontflag = P_PointOnLineSide(shootthing->x, shootthing->y, li);
// 3D floor check. This is not 100% accurate but normally sufficient when
// combined with a final sight check
for (int i = 1; i <= 2; i++)
{
sector_t * s = i == 1 ? li->frontsector : li->backsector;
for (unsigned k = 0; k<s->e->XFloor.ffloors.Size(); k++)
{
crossedffloors = true;
rover = s->e->XFloor.ffloors[k];
if ((rover->flags & FF_SHOOTTHROUGH) || !(rover->flags & FF_EXISTS)) continue;
fixed_t ff_bottom = rover->bottom.plane->ZatPoint(trX, trY);
fixed_t ff_top = rover->top.plane->ZatPoint(trX, trY);
highpitch = -(int)R_PointToAngle2(0, shootz, dist, ff_top);
lowpitch = -(int)R_PointToAngle2(0, shootz, dist, ff_bottom);
if (highpitch <= toppitch)
{
// blocks completely
if (lowpitch >= bottompitch) return false;
// blocks upper edge of view
if (lowpitch>toppitch)
{
toppitch = lowpitch;
if (frontflag != i - 1)
{
nexttopplane = rover->bottom.plane;
}
}
}
else if (lowpitch >= bottompitch)
{
// blocks lower edge of view
if (highpitch<bottompitch)
{
bottompitch = highpitch;
if (frontflag != i - 1)
{
nextbottomplane = rover->top.plane;
}
}
}
// trace is leaving a sector with a 3d-floor
if (frontflag == i - 1)
{
if (s == lastsector)
{
// upper slope intersects with this 3d-floor
if (rover->bottom.plane == lastceilingplane && lowpitch > toppitch)
{
toppitch = lowpitch;
}
// lower slope intersects with this 3d-floor
if (rover->top.plane == lastfloorplane && highpitch < bottompitch)
{
bottompitch = highpitch;
}
}
}
if (toppitch >= bottompitch) return false; // stop
}
}
}
lastsector = nextsector;
lastceilingplane = nexttopplane;
lastfloorplane = nextbottomplane;
return true;
}
//============================================================================
//
// PTR_AimTraverse
// Sets linetaget and aimpitch when a target is aimed at.
//
//============================================================================
void aim_t::AimTraverse(fixed_t startx, fixed_t starty, fixed_t endx, fixed_t endy, AActor *target)
{
FPathTraverse it(startx, starty, endx, endy, PT_ADDLINES | PT_ADDTHINGS | PT_COMPATIBLE);
intercept_t *in;
while ((in = it.Next()))
{
line_t* li;
AActor* th;
fixed_t pitch;
fixed_t thingtoppitch;
fixed_t thingbottompitch;
fixed_t dist;
int thingpitch;
if (in->isaline)
{
li = in->d.line;
if (!(li->flags & ML_TWOSIDED) || (li->flags & ML_BLOCKEVERYTHING))
return; // stop
// Crosses a two sided line.
// A two sided line will restrict the possible target ranges.
FLineOpening open;
P_LineOpening(open, NULL, li, it.Trace().x + FixedMul(it.Trace().dx, in->frac),
it.Trace().y + FixedMul(it.Trace().dy, in->frac));
if (open.bottom >= open.top)
return; // stop
dist = FixedMul(attackrange, in->frac);
pitch = -(int)R_PointToAngle2(0, shootz, dist, open.bottom);
if (pitch < bottompitch)
bottompitch = pitch;
pitch = -(int)R_PointToAngle2(0, shootz, dist, open.top);
if (pitch > toppitch)
toppitch = pitch;
if (toppitch >= bottompitch)
return; // stop
if (!AimTraverse3DFloors(it.Trace(), in)) return;
continue; // shot continues
}
// shoot a thing
th = in->d.thing;
if (th == shootthing)
continue; // can't shoot self
if (target != NULL && th != target)
continue; // only care about target, and you're not it
// If we want to start a conversation anything that has one should be
// found, regardless of other settings.
if (!(flags & ALF_CHECKCONVERSATION) || th->Conversation == NULL)
{
if (!(flags & ALF_CHECKNONSHOOTABLE)) // For info CCMD, ignore stuff about GHOST and SHOOTABLE flags
{
if (!(th->flags&MF_SHOOTABLE))
continue; // corpse or something
// check for physical attacks on a ghost
if ((th->flags3 & MF3_GHOST) &&
shootthing->player && // [RH] Be sure shootthing is a player
shootthing->player->ReadyWeapon &&
(shootthing->player->ReadyWeapon->flags2 & MF2_THRUGHOST))
{
continue;
}
}
}
dist = FixedMul(attackrange, in->frac);
// Don't autoaim certain special actors
if (!cl_doautoaim && th->flags6 & MF6_NOTAUTOAIMED)
{
continue;
}
// we must do one last check whether the trace has crossed a 3D floor
if (lastsector == th->Sector && th->Sector->e->XFloor.ffloors.Size())
{
if (lastceilingplane)
{
fixed_t ff_top = lastceilingplane->ZatPoint(th->x, th->y);
fixed_t pitch = -(int)R_PointToAngle2(0, shootz, dist, ff_top);
// upper slope intersects with this 3d-floor
if (pitch > toppitch)
{
toppitch = pitch;
}
}
if (lastfloorplane)
{
fixed_t ff_bottom = lastfloorplane->ZatPoint(th->x, th->y);
fixed_t pitch = -(int)R_PointToAngle2(0, shootz, dist, ff_bottom);
// lower slope intersects with this 3d-floor
if (pitch < bottompitch)
{
bottompitch = pitch;
}
}
}
// check angles to see if the thing can be aimed at
thingtoppitch = -(int)R_PointToAngle2(0, shootz, dist, th->z + th->height);
if (thingtoppitch > bottompitch)
continue; // shot over the thing
thingbottompitch = -(int)R_PointToAngle2(0, shootz, dist, th->z);
if (thingbottompitch < toppitch)
continue; // shot under the thing
if (crossedffloors)
{
// if 3D floors were in the way do an extra visibility check for safety
if (!P_CheckSight(shootthing, th, SF_IGNOREVISIBILITY | SF_IGNOREWATERBOUNDARY))
{
// the thing can't be seen so we can safely exclude its range from our aiming field
if (thingtoppitch<toppitch)
{
if (thingbottompitch>toppitch) toppitch = thingbottompitch;
}
else if (thingbottompitch>bottompitch)
{
if (thingtoppitch<bottompitch) bottompitch = thingtoppitch;
}
if (toppitch < bottompitch) continue;
else return;
}
}
// this thing can be hit!
if (thingtoppitch < toppitch)
thingtoppitch = toppitch;
if (thingbottompitch > bottompitch)
thingbottompitch = bottompitch;
thingpitch = thingtoppitch / 2 + thingbottompitch / 2;
if (flags & ALF_CHECK3D)
{
// We need to do a 3D distance check here because this is nearly always used in
// combination with P_LineAttack. P_LineAttack uses 3D distance but FPathTraverse
// only 2D. This causes some problems with Hexen's weapons that use different
// attack modes based on distance to target
fixed_t cosine = finecosine[thingpitch >> ANGLETOFINESHIFT];
if (cosine != 0)
{
fixed_t d3 = FixedDiv(FixedMul(P_AproxDistance(it.Trace().dx, it.Trace().dy), in->frac), cosine);
if (d3 > attackrange)
{
return;
}
}
}
if ((flags & ALF_NOFRIENDS) && th->IsFriend(friender))
{
continue;
}
else if (sv_smartaim != 0 && !(flags & ALF_FORCENOSMART))
{
// try to be a little smarter about what to aim at!
// In particular avoid autoaiming at friends and barrels.
if (th->IsFriend(friender))
{
if (sv_smartaim < 2)
{
// friends don't aim at friends (except players), at least not first
thing_friend = th;
pitch_friend = thingpitch;
}
}
else if (!(th->flags3 & MF3_ISMONSTER) && th->player == NULL)
{
if (sv_smartaim < 3)
{
// don't autoaim at barrels and other shootable stuff unless no monsters have been found
thing_other = th;
pitch_other = thingpitch;
}
}
else
{
linetarget = th;
aimpitch = thingpitch;
return;
}
}
else
{
linetarget = th;
aimpitch = thingpitch;
return;
}
}
}
//============================================================================
//
// P_AimLineAttack
//
//============================================================================
fixed_t P_AimLineAttack(AActor *t1, angle_t angle, fixed_t distance, AActor **pLineTarget, fixed_t vrange,
int flags, AActor *target, AActor *friender)
{
fixed_t x2;
fixed_t y2;
aim_t aim;
angle >>= ANGLETOFINESHIFT;
aim.flags = flags;
aim.shootthing = t1;
aim.friender = (friender == NULL) ? t1 : friender;
x2 = t1->x + (distance >> FRACBITS)*finecosine[angle];
y2 = t1->y + (distance >> FRACBITS)*finesine[angle];
aim.shootz = t1->z + (t1->height >> 1) - t1->floorclip;
if (t1->player != NULL)
{
aim.shootz += FixedMul(t1->player->mo->AttackZOffset, t1->player->crouchfactor);
}
else
{
aim.shootz += 8 * FRACUNIT;
}
// can't shoot outside view angles
if (vrange == 0)
{
if (t1->player == NULL || !level.IsFreelookAllowed())
{
vrange = ANGLE_1 * 35;
}
else
{
// [BB] Disable autoaim on weapons with WIF_NOAUTOAIM.
AWeapon *weapon = t1->player->ReadyWeapon;
if (weapon && (weapon->WeaponFlags & WIF_NOAUTOAIM))
{
vrange = ANGLE_1 / 2;
}
else
{
// 35 degrees is approximately what Doom used. You cannot have a
// vrange of 0 degrees, because then toppitch and bottompitch will
// be equal, and PTR_AimTraverse will never find anything to shoot at
// if it crosses a line.
vrange = clamp(t1->player->userinfo.GetAimDist(), ANGLE_1 / 2, ANGLE_1 * 35);
}
}
}
aim.toppitch = t1->pitch - vrange;
aim.bottompitch = t1->pitch + vrange;
aim.attackrange = distance;
aim.linetarget = NULL;
// for smart aiming
aim.thing_friend = aim.thing_other = NULL;
// Information for tracking crossed 3D floors
aim.aimpitch = t1->pitch;
aim.crossedffloors = t1->Sector->e->XFloor.ffloors.Size() != 0;
aim.lastsector = t1->Sector;
aim.lastfloorplane = aim.lastceilingplane = NULL;
// set initial 3d-floor info
for (unsigned i = 0; i<t1->Sector->e->XFloor.ffloors.Size(); i++)
{
F3DFloor * rover = t1->Sector->e->XFloor.ffloors[i];
fixed_t bottomz = rover->bottom.plane->ZatPoint(t1->x, t1->y);
if (bottomz >= t1->z + t1->height) aim.lastceilingplane = rover->bottom.plane;
bottomz = rover->top.plane->ZatPoint(t1->x, t1->y);
if (bottomz <= t1->z) aim.lastfloorplane = rover->top.plane;
}
aim.AimTraverse(t1->x, t1->y, x2, y2, target);
if (!aim.linetarget)
{
if (aim.thing_other)
{
aim.linetarget = aim.thing_other;
aim.aimpitch = aim.pitch_other;
}
else if (aim.thing_friend)
{
aim.linetarget = aim.thing_friend;
aim.aimpitch = aim.pitch_friend;
}
}
if (pLineTarget)
{
*pLineTarget = aim.linetarget;
}
return aim.linetarget ? aim.aimpitch : t1->pitch;
}
//==========================================================================
//
//
//
//==========================================================================
struct Origin
{
AActor *Caller;
bool hitGhosts;
bool hitSameSpecies;
};
static ETraceStatus CheckForActor(FTraceResults &res, void *userdata)
{
if (res.HitType != TRACE_HitActor)
{
return TRACE_Stop;
}
Origin *data = (Origin *)userdata;
// check for physical attacks on spectrals
if (res.Actor->flags4 & MF4_SPECTRAL)
{
return TRACE_Skip;
}
if (data->hitSameSpecies && res.Actor->GetSpecies() == data->Caller->GetSpecies())
{
return TRACE_Skip;
}
if (data->hitGhosts && res.Actor->flags3 & MF3_GHOST)
{
return TRACE_Skip;
}
return TRACE_Stop;
}
//==========================================================================
//
// P_LineAttack
//
// if damage == 0, it is just a test trace that will leave linetarget set
//
//==========================================================================
AActor *P_LineAttack(AActor *t1, angle_t angle, fixed_t distance,
int pitch, int damage, FName damageType, const PClass *pufftype, int flags, AActor **victim, int *actualdamage)
{
fixed_t vx, vy, vz, shootz;
FTraceResults trace;
Origin TData;
TData.Caller = t1;
angle_t srcangle = angle;
int srcpitch = pitch;
bool killPuff = false;
AActor *puff = NULL;
int pflag = 0;
int puffFlags = (flags & LAF_ISMELEEATTACK) ? PF_MELEERANGE : 0;
if (flags & LAF_NORANDOMPUFFZ)
puffFlags |= PF_NORANDOMZ;
if (victim != NULL)
{
*victim = NULL;
}
if (actualdamage != NULL)
{
*actualdamage = 0;
}
angle >>= ANGLETOFINESHIFT;
pitch = (angle_t)(pitch) >> ANGLETOFINESHIFT;
vx = FixedMul(finecosine[pitch], finecosine[angle]);
vy = FixedMul(finecosine[pitch], finesine[angle]);
vz = -finesine[pitch];
shootz = t1->z - t1->floorclip + (t1->height >> 1);
if (t1->player != NULL)
{
shootz += FixedMul(t1->player->mo->AttackZOffset, t1->player->crouchfactor);
if (damageType == NAME_Melee || damageType == NAME_Hitscan)
{
// this is coming from a weapon attack function which needs to transfer information to the obituary code,
// We need to preserve this info from the damage type because the actual damage type can get overridden by the puff
pflag = DMG_PLAYERATTACK;
}
}
else
{
shootz += 8 * FRACUNIT;
}
// We need to check the defaults of the replacement here
AActor *puffDefaults = GetDefaultByType(pufftype->GetReplacement());
TData.hitGhosts = (t1->player != NULL &&
t1->player->ReadyWeapon != NULL &&
(t1->player->ReadyWeapon->flags2 & MF2_THRUGHOST)) ||
(puffDefaults && (puffDefaults->flags2 & MF2_THRUGHOST));
TData.hitSameSpecies = (puffDefaults && (puffDefaults->flags6 & MF6_MTHRUSPECIES));
// if the puff uses a non-standard damage type, this will override default, hitscan and melee damage type.
// All other explicitly passed damage types (currenty only MDK) will be preserved.
if ((damageType == NAME_None || damageType == NAME_Melee || damageType == NAME_Hitscan) &&
puffDefaults != NULL && puffDefaults->DamageType != NAME_None)
{
damageType = puffDefaults->DamageType;
}
int tflags;
if (puffDefaults != NULL && puffDefaults->flags6 & MF6_NOTRIGGER) tflags = TRACE_NoSky;
else tflags = TRACE_NoSky | TRACE_Impact;
if (!Trace(t1->x, t1->y, shootz, t1->Sector, vx, vy, vz, distance,
MF_SHOOTABLE, ML_BLOCKEVERYTHING | ML_BLOCKHITSCAN, t1, trace,
tflags, CheckForActor, &TData))
{ // hit nothing
if (puffDefaults == NULL)
{
}
else if (puffDefaults->ActiveSound)
{ // Play miss sound
S_Sound(t1, CHAN_WEAPON, puffDefaults->ActiveSound, 1, ATTN_NORM);
}
if (puffDefaults != NULL && puffDefaults->flags3 & MF3_ALWAYSPUFF)
{ // Spawn the puff anyway
puff = P_SpawnPuff(t1, pufftype, trace.X, trace.Y, trace.Z, angle - ANG180, 2, puffFlags);
}
else
{
return NULL;
}
}
else
{
fixed_t hitx = 0, hity = 0, hitz = 0;
if (trace.HitType != TRACE_HitActor)
{
// position a bit closer for puffs
if (trace.HitType != TRACE_HitWall || trace.Line->special != Line_Horizon)
{
fixed_t closer = trace.Distance - 4 * FRACUNIT;
puff = P_SpawnPuff(t1, pufftype, t1->x + FixedMul(vx, closer),
t1->y + FixedMul(vy, closer),
shootz + FixedMul(vz, closer), angle - ANG90, 0, puffFlags);
}
// [RH] Spawn a decal
if (trace.HitType == TRACE_HitWall && trace.Line->special != Line_Horizon && !(flags & LAF_NOIMPACTDECAL) && !(puffDefaults->flags7 & MF7_NODECAL))
{
// [TN] If the actor or weapon has a decal defined, use that one.
if (t1->DecalGenerator != NULL ||
(t1->player != NULL && t1->player->ReadyWeapon != NULL && t1->player->ReadyWeapon->DecalGenerator != NULL))
{
// [ZK] If puff has FORCEDECAL set, do not use the weapon's decal
if (puffDefaults->flags7 & MF7_FORCEDECAL && puff != NULL && puff->DecalGenerator)
SpawnShootDecal(puff, trace);
else
SpawnShootDecal(t1, trace);
}
// Else, look if the bulletpuff has a decal defined.
else if (puff != NULL && puff->DecalGenerator)
{
SpawnShootDecal(puff, trace);
}
else
{
SpawnShootDecal(t1, trace);
}
}
else if (puff != NULL &&
trace.CrossedWater == NULL &&
trace.Sector->heightsec == NULL &&
trace.HitType == TRACE_HitFloor)
{
// Using the puff's position is not accurate enough.
// Instead make it splash at the actual hit position
hitx = t1->x + FixedMul(vx, trace.Distance);
hity = t1->y + FixedMul(vy, trace.Distance);
hitz = shootz + FixedMul(vz, trace.Distance);
P_HitWater(puff, P_PointInSector(hitx, hity), hitx, hity, hitz);
}
}
else
{
bool bloodsplatter = (t1->flags5 & MF5_BLOODSPLATTER) ||
(t1->player != NULL && t1->player->ReadyWeapon != NULL &&
(t1->player->ReadyWeapon->WeaponFlags & WIF_AXEBLOOD));
bool axeBlood = (t1->player != NULL &&
t1->player->ReadyWeapon != NULL &&
(t1->player->ReadyWeapon->WeaponFlags & WIF_AXEBLOOD));
// Hit a thing, so it could be either a puff or blood
fixed_t dist = trace.Distance;
// position a bit closer for puffs/blood if using compatibility mode.
if (i_compatflags & COMPATF_HITSCAN) dist -= 10 * FRACUNIT;
hitx = t1->x + FixedMul(vx, dist);
hity = t1->y + FixedMul(vy, dist);
hitz = shootz + FixedMul(vz, dist);
// Spawn bullet puffs or blood spots, depending on target type.
if ((puffDefaults != NULL && puffDefaults->flags3 & MF3_PUFFONACTORS) ||
(trace.Actor->flags & MF_NOBLOOD) ||
(trace.Actor->flags2 & (MF2_INVULNERABLE | MF2_DORMANT)))
{
if (!(trace.Actor->flags & MF_NOBLOOD))
puffFlags |= PF_HITTHINGBLEED;
// We must pass the unreplaced puff type here
puff = P_SpawnPuff(t1, pufftype, hitx, hity, hitz, angle - ANG180, 2, puffFlags | PF_HITTHING, trace.Actor);
}
// Allow puffs to inflict poison damage, so that hitscans can poison, too.
if (puffDefaults != NULL && puffDefaults->PoisonDamage > 0 && puffDefaults->PoisonDuration != INT_MIN)
{
P_PoisonMobj(trace.Actor, puff ? puff : t1, t1, puffDefaults->PoisonDamage, puffDefaults->PoisonDuration, puffDefaults->PoisonPeriod, puffDefaults->PoisonDamageType);
}
// [GZ] If MF6_FORCEPAIN is set, we need to call P_DamageMobj even if damage is 0!
// Note: The puff may not yet be spawned here so we must check the class defaults, not the actor.
int newdam = damage;
if (damage || (puffDefaults != NULL && ((puffDefaults->flags6 & MF6_FORCEPAIN) || (puffDefaults->flags7 & MF7_CAUSEPAIN))))
{
int dmgflags = DMG_INFLICTOR_IS_PUFF | pflag;
// Allow MF5_PIERCEARMOR on a weapon as well.
if (t1->player != NULL && (dmgflags & DMG_PLAYERATTACK) && t1->player->ReadyWeapon != NULL &&
t1->player->ReadyWeapon->flags5 & MF5_PIERCEARMOR)
{
dmgflags |= DMG_NO_ARMOR;
}
if (puff == NULL)
{
// Since the puff is the damage inflictor we need it here
// regardless of whether it is displayed or not.
puff = P_SpawnPuff(t1, pufftype, hitx, hity, hitz, angle - ANG180, 2, puffFlags | PF_HITTHING | PF_TEMPORARY);
killPuff = true;
}
newdam = P_DamageMobj(trace.Actor, puff ? puff : t1, t1, damage, damageType, dmgflags);
if (actualdamage != NULL)
{
*actualdamage = newdam;
}
}
if (!(puffDefaults != NULL && puffDefaults->flags3&MF3_BLOODLESSIMPACT))
{
if (!bloodsplatter && !axeBlood &&
!(trace.Actor->flags & MF_NOBLOOD) &&
!(trace.Actor->flags2 & (MF2_INVULNERABLE | MF2_DORMANT)))
{
P_SpawnBlood(hitx, hity, hitz, angle - ANG180, newdam > 0 ? newdam : damage, trace.Actor);
}
if (damage)
{
if (bloodsplatter || axeBlood)
{
if (!(trace.Actor->flags&MF_NOBLOOD) &&
!(trace.Actor->flags2&(MF2_INVULNERABLE | MF2_DORMANT)))
{
if (axeBlood)
{
P_BloodSplatter2(hitx, hity, hitz, trace.Actor);
}
if (pr_lineattack() < 192)
{
P_BloodSplatter(hitx, hity, hitz, trace.Actor);
}
}
}
// [RH] Stick blood to walls
P_TraceBleed(newdam > 0 ? newdam : damage, trace.X, trace.Y, trace.Z,
trace.Actor, srcangle, srcpitch);
}
}
if (victim != NULL)
{
*victim = trace.Actor;
}
}
if (trace.Crossed3DWater || trace.CrossedWater)
{
if (puff == NULL)
{ // Spawn puff just to get a mass for the splash
puff = P_SpawnPuff(t1, pufftype, hitx, hity, hitz, angle - ANG180, 2, puffFlags | PF_HITTHING | PF_TEMPORARY);
killPuff = true;
}
SpawnDeepSplash(t1, trace, puff, vx, vy, vz, shootz, trace.Crossed3DWater != NULL);
}
}
if (killPuff && puff != NULL)
{
puff->Destroy();
puff = NULL;
}
return puff;
}
AActor *P_LineAttack(AActor *t1, angle_t angle, fixed_t distance,
int pitch, int damage, FName damageType, FName pufftype, int flags, AActor **victim, int *actualdamage)
{
const PClass * type = PClass::FindClass(pufftype);
if (victim != NULL)
{
*victim = NULL;
}
if (type == NULL)
{
Printf("Attempt to spawn unknown actor type '%s'\n", pufftype.GetChars());
}
else
{
return P_LineAttack(t1, angle, distance, pitch, damage, damageType, type, flags, victim, actualdamage);
}
return NULL;
}
//==========================================================================
//
// P_LinePickActor
//
//==========================================================================
AActor *P_LinePickActor(AActor *t1, angle_t angle, fixed_t distance, int pitch,
DWORD actorMask, DWORD wallMask)
{
fixed_t vx, vy, vz, shootz;
angle >>= ANGLETOFINESHIFT;
pitch = (angle_t)(pitch) >> ANGLETOFINESHIFT;
vx = FixedMul(finecosine[pitch], finecosine[angle]);
vy = FixedMul(finecosine[pitch], finesine[angle]);
vz = -finesine[pitch];
shootz = t1->z - t1->floorclip + (t1->height >> 1);
if (t1->player != NULL)
{
shootz += FixedMul(t1->player->mo->AttackZOffset, t1->player->crouchfactor);
}
else
{
shootz += 8 * FRACUNIT;
}
FTraceResults trace;
Origin TData;
TData.Caller = t1;
TData.hitGhosts = true;
if (Trace(t1->x, t1->y, shootz, t1->Sector, vx, vy, vz, distance,
actorMask, wallMask, t1, trace, TRACE_NoSky, CheckForActor, &TData))
{
if (trace.HitType == TRACE_HitActor)
{
return trace.Actor;
}
}
return NULL;
}
//==========================================================================
//
//
//
//==========================================================================
void P_TraceBleed(int damage, fixed_t x, fixed_t y, fixed_t z, AActor *actor, angle_t angle, int pitch)
{
if (!cl_bloodsplats)
return;
const char *bloodType = "BloodSplat";
int count;
int noise;
if ((actor->flags & MF_NOBLOOD) ||
(actor->flags5 & MF5_NOBLOODDECALS) ||
(actor->flags2 & (MF2_INVULNERABLE | MF2_DORMANT)) ||
(actor->player && actor->player->cheats & CF_GODMODE))
{
return;
}
if (damage < 15)
{ // For low damages, there is a chance to not spray blood at all
if (damage <= 10)
{
if (pr_tracebleed() < 160)
{
return;
}
}
count = 1;
noise = 18;
}
else if (damage < 25)
{
count = 2;
noise = 19;
}
else
{ // For high damages, there is a chance to spray just one big glob of blood
if (pr_tracebleed() < 24)
{
bloodType = "BloodSmear";
count = 1;
noise = 20;
}
else
{
count = 3;
noise = 20;
}
}
for (; count; --count)
{
FTraceResults bleedtrace;
angle_t bleedang = (angle + ((pr_tracebleed() - 128) << noise)) >> ANGLETOFINESHIFT;
angle_t bleedpitch = (angle_t)(pitch + ((pr_tracebleed() - 128) << noise)) >> ANGLETOFINESHIFT;
fixed_t vx = FixedMul(finecosine[bleedpitch], finecosine[bleedang]);
fixed_t vy = FixedMul(finecosine[bleedpitch], finesine[bleedang]);
fixed_t vz = -finesine[bleedpitch];
if (Trace(x, y, z, actor->Sector,
vx, vy, vz, 172 * FRACUNIT, 0, ML_BLOCKEVERYTHING, actor,
bleedtrace, TRACE_NoSky))
{
if (bleedtrace.HitType == TRACE_HitWall)
{
PalEntry bloodcolor = actor->GetBloodColor();
if (bloodcolor != 0)
{
bloodcolor.r >>= 1; // the full color is too bright for blood decals
bloodcolor.g >>= 1;
bloodcolor.b >>= 1;
bloodcolor.a = 1;
}
DImpactDecal::StaticCreate(bloodType,
bleedtrace.X, bleedtrace.Y, bleedtrace.Z,
bleedtrace.Line->sidedef[bleedtrace.Side],
bleedtrace.ffloor,
bloodcolor);
}
}
}
}
void P_TraceBleed(int damage, AActor *target, angle_t angle, int pitch)
{
P_TraceBleed(damage, target->x, target->y, target->z + target->height / 2,
target, angle, pitch);
}
//==========================================================================
//
//
//
//==========================================================================
void P_TraceBleed(int damage, AActor *target, AActor *missile)
{
int pitch;
if (target == NULL || missile->flags3 & MF3_BLOODLESSIMPACT)
{
return;
}
if (missile->velz != 0)
{
double aim;
aim = atan((double)missile->velz / (double)P_AproxDistance(missile->x - target->x, missile->y - target->y));
pitch = -(int)(aim * ANGLE_180 / PI);
}
else
{
pitch = 0;
}
P_TraceBleed(damage, target->x, target->y, target->z + target->height / 2,
target, R_PointToAngle2(missile->x, missile->y, target->x, target->y),
pitch);
}
//==========================================================================
//
//
//
//==========================================================================
void P_TraceBleed(int damage, AActor *target)
{
if (target != NULL)
{
fixed_t one = pr_tracebleed() << 24;
fixed_t two = (pr_tracebleed() - 128) << 16;
P_TraceBleed(damage, target->x, target->y, target->z + target->height / 2,
target, one, two);
}
}
//==========================================================================
//
// [RH] Rail gun stuffage
//
//==========================================================================
struct SRailHit
{
AActor *HitActor;
fixed_t Distance;
};
struct RailData
{
AActor *Caller;
TArray<SRailHit> RailHits;
bool StopAtOne;
bool StopAtInvul;
bool ThruSpecies;
};
static ETraceStatus ProcessRailHit(FTraceResults &res, void *userdata)
{
RailData *data = (RailData *)userdata;
if (res.HitType != TRACE_HitActor)
{
return TRACE_Stop;
}
// Invulnerable things completely block the shot
if (data->StopAtInvul && res.Actor->flags2 & MF2_INVULNERABLE)
{
return TRACE_Stop;
}
// Skip actors with the same species if the puff has MTHRUSPECIES.
if (data->ThruSpecies && res.Actor->GetSpecies() == data->Caller->GetSpecies())
{
return TRACE_Skip;
}
// Save this thing for damaging later, and continue the trace
SRailHit newhit;
newhit.HitActor = res.Actor;
newhit.Distance = res.Distance - 10 * FRACUNIT; // put blood in front
data->RailHits.Push(newhit);
return data->StopAtOne ? TRACE_Stop : TRACE_Continue;
}
//==========================================================================
//
//
//
//==========================================================================
void P_RailAttack(AActor *source, int damage, int offset_xy, fixed_t offset_z, int color1, int color2, double maxdiff, int railflags, const PClass *puffclass, angle_t angleoffset, angle_t pitchoffset, fixed_t distance, int duration, double sparsity, double drift, const PClass *spawnclass, int SpiralOffset)
{
fixed_t vx, vy, vz;
angle_t angle, pitch;
fixed_t x1, y1;
TVector3<double> start, end;
FTraceResults trace;
fixed_t shootz;
if (puffclass == NULL) puffclass = PClass::FindClass(NAME_BulletPuff);
pitch = ((angle_t)(-source->pitch) + pitchoffset) >> ANGLETOFINESHIFT;
angle = (source->angle + angleoffset) >> ANGLETOFINESHIFT;
vx = FixedMul(finecosine[pitch], finecosine[angle]);
vy = FixedMul(finecosine[pitch], finesine[angle]);
vz = finesine[pitch];
x1 = source->x;
y1 = source->y;
shootz = source->z - source->floorclip + (source->height >> 1) + offset_z;
if (!(railflags & RAF_CENTERZ))
{
if (source->player != NULL)
{
shootz += FixedMul(source->player->mo->AttackZOffset, source->player->crouchfactor);
}
else
{
shootz += 8 * FRACUNIT;
}
}
angle = ((source->angle + angleoffset) - ANG90) >> ANGLETOFINESHIFT;
x1 += offset_xy * finecosine[angle];
y1 += offset_xy * finesine[angle];
RailData rail_data;
rail_data.Caller = source;
rail_data.StopAtOne = !!(railflags & RAF_NOPIERCE);
start.X = FIXED2FLOAT(x1);
start.Y = FIXED2FLOAT(y1);
start.Z = FIXED2FLOAT(shootz);
int flags;
assert(puffclass != NULL); // Because we set it to a default above
AActor *puffDefaults = GetDefaultByType(puffclass->GetReplacement()); //Contains all the flags such as FOILINVUL, etc.
flags = (puffDefaults->flags6 & MF6_NOTRIGGER) ? 0 : TRACE_PCross | TRACE_Impact;
rail_data.StopAtInvul = (puffDefaults->flags3 & MF3_FOILINVUL) ? false : true;
rail_data.ThruSpecies = (puffDefaults->flags6 & MF6_MTHRUSPECIES) ? true : false;
Trace(x1, y1, shootz, source->Sector, vx, vy, vz,
distance, MF_SHOOTABLE, ML_BLOCKEVERYTHING, source, trace,
flags, ProcessRailHit, &rail_data);
// Hurt anything the trace hit
unsigned int i;
FName damagetype = (puffDefaults == NULL || puffDefaults->DamageType == NAME_None) ? FName(NAME_Railgun) : puffDefaults->DamageType;
// used as damage inflictor
AActor *thepuff = NULL;
if (puffclass != NULL) thepuff = Spawn(puffclass, source->x, source->y, source->z, ALLOW_REPLACE);
for (i = 0; i < rail_data.RailHits.Size(); i++)
{
fixed_t x, y, z;
bool spawnpuff;
bool bleed = false;
int puffflags = PF_HITTHING;
AActor *hitactor = rail_data.RailHits[i].HitActor;
fixed_t hitdist = rail_data.RailHits[i].Distance;
x = x1 + FixedMul(hitdist, vx);
y = y1 + FixedMul(hitdist, vy);
z = shootz + FixedMul(hitdist, vz);
if ((hitactor->flags & MF_NOBLOOD) ||
(hitactor->flags2 & MF2_DORMANT || ((hitactor->flags2 & MF2_INVULNERABLE) && !(puffDefaults->flags3 & MF3_FOILINVUL))))
{
spawnpuff = (puffclass != NULL);
}
else
{
spawnpuff = (puffclass != NULL && puffDefaults->flags3 & MF3_ALWAYSPUFF);
puffflags |= PF_HITTHINGBLEED; // [XA] Allow for puffs to jump to XDeath state.
if (!(puffDefaults->flags3 & MF3_BLOODLESSIMPACT))
{
bleed = true;
}
}
if (spawnpuff)
{
P_SpawnPuff(source, puffclass, x, y, z, (source->angle + angleoffset) - ANG90, 1, puffflags, hitactor);
}
int dmgFlagPass = DMG_INFLICTOR_IS_PUFF;
if (puffDefaults != NULL) // is this even possible?
{
if (puffDefaults->PoisonDamage > 0 && puffDefaults->PoisonDuration != INT_MIN)
{
P_PoisonMobj(hitactor, thepuff ? thepuff : source, source, puffDefaults->PoisonDamage, puffDefaults->PoisonDuration, puffDefaults->PoisonPeriod, puffDefaults->PoisonDamageType);
}
if (puffDefaults->flags3 & MF3_FOILINVUL) dmgFlagPass |= DMG_FOILINVUL;
if (puffDefaults->flags7 & MF7_FOILBUDDHA) dmgFlagPass |= DMG_FOILBUDDHA;
}
int newdam = P_DamageMobj(hitactor, thepuff ? thepuff : source, source, damage, damagetype, dmgFlagPass);
if (bleed)
{
P_SpawnBlood(x, y, z, (source->angle + angleoffset) - ANG180, newdam > 0 ? newdam : damage, hitactor);
P_TraceBleed(newdam > 0 ? newdam : damage, x, y, z, hitactor, source->angle, pitch);
}
}
// Spawn a decal or puff at the point where the trace ended.
if (trace.HitType == TRACE_HitWall)
{
AActor* puff = NULL;
if (puffclass != NULL && puffDefaults->flags3 & MF3_ALWAYSPUFF)
{
puff = P_SpawnPuff(source, puffclass, trace.X, trace.Y, trace.Z, (source->angle + angleoffset) - ANG90, 1, 0);
}
if (puff != NULL && puffDefaults->flags7 & MF7_FORCEDECAL && puff->DecalGenerator)
SpawnShootDecal(puff, trace);
else
SpawnShootDecal(source, trace);
}
if (thepuff != NULL)
{
if (trace.HitType == TRACE_HitFloor &&
trace.CrossedWater == NULL &&
trace.Sector->heightsec == NULL)
{
thepuff->SetOrigin(trace.X, trace.Y, trace.Z);
P_HitWater(thepuff, trace.Sector);
}
if (trace.Crossed3DWater || trace.CrossedWater)
{
SpawnDeepSplash(source, trace, thepuff, vx, vy, vz, shootz, trace.Crossed3DWater != NULL);
}
thepuff->Destroy();
}
// Draw the slug's trail.
end.X = FIXED2DBL(trace.X);
end.Y = FIXED2DBL(trace.Y);
end.Z = FIXED2DBL(trace.Z);
P_DrawRailTrail(source, start, end, color1, color2, maxdiff, railflags, spawnclass, source->angle + angleoffset, duration, sparsity, drift, SpiralOffset);
}
//==========================================================================
//
// [RH] P_AimCamera
//
//==========================================================================
CVAR(Float, chase_height, -8.f, CVAR_ARCHIVE | CVAR_GLOBALCONFIG)
CVAR(Float, chase_dist, 90.f, CVAR_ARCHIVE | CVAR_GLOBALCONFIG)
void P_AimCamera(AActor *t1, fixed_t &CameraX, fixed_t &CameraY, fixed_t &CameraZ, sector_t *&CameraSector)
{
fixed_t distance = (fixed_t)(clamp<double>(chase_dist, 0, 30000) * FRACUNIT);
angle_t angle = (t1->angle - ANG180) >> ANGLETOFINESHIFT;
angle_t pitch = (angle_t)(t1->pitch) >> ANGLETOFINESHIFT;
FTraceResults trace;
fixed_t vx, vy, vz, sz;
vx = FixedMul(finecosine[pitch], finecosine[angle]);
vy = FixedMul(finecosine[pitch], finesine[angle]);
vz = finesine[pitch];
sz = t1->z - t1->floorclip + t1->height + (fixed_t)(clamp<double>(chase_height, -1000, 1000) * FRACUNIT);
if (Trace(t1->x, t1->y, sz, t1->Sector,
vx, vy, vz, distance, 0, 0, NULL, trace) &&
trace.Distance > 10 * FRACUNIT)
{
// Position camera slightly in front of hit thing
fixed_t dist = trace.Distance - 5 * FRACUNIT;
CameraX = t1->x + FixedMul(vx, dist);
CameraY = t1->y + FixedMul(vy, dist);
CameraZ = sz + FixedMul(vz, dist);
}
else
{
CameraX = trace.X;
CameraY = trace.Y;
CameraZ = trace.Z;
}
CameraSector = trace.Sector;
}
//==========================================================================
//
// P_TalkFacing
//
// Looks for something within 5.625 degrees left or right of the player
// to talk to.
//
//==========================================================================
bool P_TalkFacing(AActor *player)
{
AActor *linetarget;
P_AimLineAttack(player, player->angle, TALKRANGE, &linetarget, ANGLE_1 * 35, ALF_FORCENOSMART | ALF_CHECKCONVERSATION);
if (linetarget == NULL)
{
P_AimLineAttack(player, player->angle + (ANGLE_90 >> 4), TALKRANGE, &linetarget, ANGLE_1 * 35, ALF_FORCENOSMART | ALF_CHECKCONVERSATION);
if (linetarget == NULL)
{
P_AimLineAttack(player, player->angle - (ANGLE_90 >> 4), TALKRANGE, &linetarget, ANGLE_1 * 35, ALF_FORCENOSMART | ALF_CHECKCONVERSATION);
if (linetarget == NULL)
{
return false;
}
}
}
// Dead things can't talk.
if (linetarget->health <= 0)
{
return false;
}
// Fighting things don't talk either.
if (linetarget->flags4 & MF4_INCOMBAT)
{
return false;
}
if (linetarget->Conversation != NULL)
{
// Give the NPC a chance to play a brief animation
linetarget->ConversationAnimation(0);
P_StartConversation(linetarget, player, true, true);
return true;
}
return false;
}
//==========================================================================
//
// USE LINES
//
//==========================================================================
bool P_UseTraverse(AActor *usething, fixed_t endx, fixed_t endy, bool &foundline)
{
FPathTraverse it(usething->x, usething->y, endx, endy, PT_ADDLINES | PT_ADDTHINGS);
intercept_t *in;
while ((in = it.Next()))
{
// [RH] Check for things to talk with or use a puzzle item on
if (!in->isaline)
{
if (usething == in->d.thing)
continue;
// Check thing
// Check for puzzle item use or USESPECIAL flag
// Extended to use the same activationtype mechanism as BUMPSPECIAL does
if (in->d.thing->flags5 & MF5_USESPECIAL || in->d.thing->special == UsePuzzleItem)
{
if (P_ActivateThingSpecial(in->d.thing, usething))
return true;
}
continue;
}
FLineOpening open;
if (in->d.line->special == 0 || !(in->d.line->activation & (SPAC_Use | SPAC_UseThrough | SPAC_UseBack)))
{
blocked:
if (in->d.line->flags & (ML_BLOCKEVERYTHING | ML_BLOCKUSE))
{
open.range = 0;
}
else
{
P_LineOpening(open, NULL, in->d.line, it.Trace().x + FixedMul(it.Trace().dx, in->frac),
it.Trace().y + FixedMul(it.Trace().dy, in->frac));
}
if (open.range <= 0 ||
(in->d.line->special != 0 && (i_compatflags & COMPATF_USEBLOCKING)))
{
// [RH] Give sector a chance to intercept the use
sector_t * sec;
sec = usething->Sector;
if (sec->SecActTarget && sec->SecActTarget->TriggerAction(usething, SECSPAC_Use))
{
return true;
}
sec = P_PointOnLineSide(usething->x, usething->y, in->d.line) == 0 ?
in->d.line->frontsector : in->d.line->backsector;
if (sec != NULL && sec->SecActTarget &&
sec->SecActTarget->TriggerAction(usething, SECSPAC_UseWall))
{
return true;
}
if (usething->player)
{
S_Sound(usething, CHAN_VOICE, "*usefail", 1, ATTN_IDLE);
}
return true; // can't use through a wall
}
foundline = true;
continue; // not a special line, but keep checking
}
if (P_PointOnLineSide(usething->x, usething->y, in->d.line) == 1)
{
if (!(in->d.line->activation & SPAC_UseBack))
{
// [RH] continue traversal for two-sided lines
//return in->d.line->backsector != NULL; // don't use back side
goto blocked; // do a proper check for back sides of triggers
}
else
{
P_ActivateLine(in->d.line, usething, 1, SPAC_UseBack);
return true;
}
}
else
{
if ((in->d.line->activation & (SPAC_Use | SPAC_UseThrough | SPAC_UseBack)) == SPAC_UseBack)
{
goto blocked; // Line cannot be used from front side so treat it as a non-trigger line
}
P_ActivateLine(in->d.line, usething, 0, SPAC_Use);
//WAS can't use more than one special line in a row
//jff 3/21/98 NOW multiple use allowed with enabling line flag
//[RH] And now I've changed it again. If the line is of type
// SPAC_USE, then it eats the use. Everything else passes
// it through, including SPAC_USETHROUGH.
if (i_compatflags & COMPATF_USEBLOCKING)
{
if (in->d.line->activation & SPAC_UseThrough) continue;
else return true;
}
else
{
if (!(in->d.line->activation & SPAC_Use)) continue;
else return true;
}
}
}
return false;
}
//==========================================================================
//
// Returns false if a "oof" sound should be made because of a blocking
// linedef. Makes 2s middles which are impassable, as well as 2s uppers
// and lowers which block the player, cause the sound effect when the
// player tries to activate them. Specials are excluded, although it is
// assumed that all special linedefs within reach have been considered
// and rejected already (see P_UseLines).
//
// by Lee Killough
//
//==========================================================================
bool P_NoWayTraverse(AActor *usething, fixed_t endx, fixed_t endy)
{
FPathTraverse it(usething->x, usething->y, endx, endy, PT_ADDLINES);
intercept_t *in;
while ((in = it.Next()))
{
line_t *ld = in->d.line;
FLineOpening open;
// [GrafZahl] de-obfuscated. Was I the only one who was unable to make sense out of
// this convoluted mess?
if (ld->special) continue;
if (ld->flags&(ML_BLOCKING | ML_BLOCKEVERYTHING | ML_BLOCK_PLAYERS)) return true;
P_LineOpening(open, NULL, ld, it.Trace().x + FixedMul(it.Trace().dx, in->frac),
it.Trace().y + FixedMul(it.Trace().dy, in->frac));
if (open.range <= 0 ||
open.bottom > usething->z + usething->MaxStepHeight ||
open.top < usething->z + usething->height) return true;
}
return false;
}
//==========================================================================
//
// P_UseLines
//
// Looks for special lines in front of the player to activate
//
//==========================================================================
void P_UseLines(player_t *player)
{
angle_t angle;
fixed_t x1, y1, usedist;
bool foundline;
foundline = false;
angle = player->mo->angle >> ANGLETOFINESHIFT;
usedist = player->mo->UseRange;
// [NS] Now queries the Player's UseRange.
x1 = player->mo->x + FixedMul(usedist, finecosine[angle]);
y1 = player->mo->y + FixedMul(usedist, finesine[angle]);
// old code:
//
// P_PathTraverse ( x1, y1, x2, y2, PT_ADDLINES, PTR_UseTraverse );
//
// This added test makes the "oof" sound work on 2s lines -- killough:
if (!P_UseTraverse(player->mo, x1, y1, foundline))
{ // [RH] Give sector a chance to eat the use
sector_t *sec = player->mo->Sector;
int spac = SECSPAC_Use;
if (foundline) spac |= SECSPAC_UseWall;
if ((!sec->SecActTarget || !sec->SecActTarget->TriggerAction(player->mo, spac)) &&
P_NoWayTraverse(player->mo, x1, y1))
{
S_Sound(player->mo, CHAN_VOICE, "*usefail", 1, ATTN_IDLE);
}
}
}
//==========================================================================
//
// P_UsePuzzleItem
//
// Returns true if the puzzle item was used on a line or a thing.
//
//==========================================================================
bool P_UsePuzzleItem(AActor *PuzzleItemUser, int PuzzleItemType)
{
int angle;
fixed_t x1, y1, x2, y2, usedist;
angle = PuzzleItemUser->angle >> ANGLETOFINESHIFT;
x1 = PuzzleItemUser->x;
y1 = PuzzleItemUser->y;
// [NS] If it's a Player, get their UseRange.
if (PuzzleItemUser->player)
usedist = PuzzleItemUser->player->mo->UseRange;
else
usedist = USERANGE;
x2 = x1 + FixedMul(usedist, finecosine[angle]);
y2 = y1 + FixedMul(usedist, finesine[angle]);
FPathTraverse it(x1, y1, x2, y2, PT_ADDLINES | PT_ADDTHINGS);
intercept_t *in;
while ((in = it.Next()))
{
AActor *mobj;
FLineOpening open;
if (in->isaline)
{ // Check line
if (in->d.line->special != UsePuzzleItem)
{
P_LineOpening(open, NULL, in->d.line, it.Trace().x + FixedMul(it.Trace().dx, in->frac),
it.Trace().y + FixedMul(it.Trace().dy, in->frac));
if (open.range <= 0)
{
return false; // can't use through a wall
}
continue;
}
if (P_PointOnLineSide(PuzzleItemUser->x, PuzzleItemUser->y, in->d.line) == 1)
{ // Don't use back sides
return false;
}
if (PuzzleItemType != in->d.line->args[0])
{ // Item type doesn't match
return false;
}
int args[3] = { in->d.line->args[2], in->d.line->args[3], in->d.line->args[4] };
P_StartScript(PuzzleItemUser, in->d.line, in->d.line->args[1], NULL, args, 3, ACS_ALWAYS);
in->d.line->special = 0;
return true;
}
// Check thing
mobj = in->d.thing;
if (mobj->special != UsePuzzleItem)
{ // Wrong special
continue;
}
if (PuzzleItemType != mobj->args[0])
{ // Item type doesn't match
continue;
}
int args[3] = { mobj->args[2], mobj->args[3], mobj->args[4] };
P_StartScript(PuzzleItemUser, NULL, mobj->args[1], NULL, args, 3, ACS_ALWAYS);
mobj->special = 0;
return true;
}
return false;
}
//==========================================================================
//
// RADIUS ATTACK
//
//
//==========================================================================
// [RH] Damage scale to apply to thing that shot the missile.
static float selfthrustscale;
CUSTOM_CVAR(Float, splashfactor, 1.f, CVAR_SERVERINFO)
{
if (self <= 0.f)
self = 1.f;
else
selfthrustscale = 1.f / self;
}
//==========================================================================
//
// P_RadiusAttack
// Source is the creature that caused the explosion at spot.
//
//==========================================================================
void P_RadiusAttack(AActor *bombspot, AActor *bombsource, int bombdamage, int bombdistance, FName bombmod,
int flags, int fulldamagedistance)
{
if (bombdistance <= 0)
return;
fulldamagedistance = clamp<int>(fulldamagedistance, 0, bombdistance - 1);
double bombdistancefloat = 1.f / (double)(bombdistance - fulldamagedistance);
double bombdamagefloat = (double)bombdamage;
FBlockThingsIterator it(FBoundingBox(bombspot->x, bombspot->y, bombdistance << FRACBITS));
AActor *thing;
if (flags & RADF_SOURCEISSPOT)
{ // The source is actually the same as the spot, even if that wasn't what we received.
bombsource = bombspot;
}
while ((thing = it.Next()))
{
// Vulnerable actors can be damaged by radius attacks even if not shootable
// Used to emulate MBF's vulnerability of non-missile bouncers to explosions.
if (!((thing->flags & MF_SHOOTABLE) || (thing->flags6 & MF6_VULNERABLE)))
continue;
// Boss spider and cyborg and Heretic's ep >= 2 bosses
// take no damage from concussion.
if (thing->flags3 & MF3_NORADIUSDMG && !(bombspot->flags4 & MF4_FORCERADIUSDMG))
continue;
if (!(flags & RADF_HURTSOURCE) && (thing == bombsource || thing == bombspot))
{ // don't damage the source of the explosion
continue;
}
// a much needed option: monsters that fire explosive projectiles cannot
// be hurt by projectiles fired by a monster of the same type.
// Controlled by the DONTHARMCLASS and DONTHARMSPECIES flags.
if ((bombsource && !thing->player) // code common to both checks
&& ( // Class check first
((bombsource->flags4 & MF4_DONTHARMCLASS) && (thing->GetClass() == bombsource->GetClass()))
|| // Nigh-identical species check second
((bombsource->flags6 & MF6_DONTHARMSPECIES) && (thing->GetSpecies() == bombsource->GetSpecies()))
)
) continue;
// Barrels always use the original code, since this makes
// them far too "active." BossBrains also use the old code
// because some user levels require they have a height of 16,
// which can make them near impossible to hit with the new code.
if ((flags & RADF_NODAMAGE) || !((bombspot->flags5 | thing->flags5) & MF5_OLDRADIUSDMG))
{
// [RH] New code. The bounding box only covers the
// height of the thing and not the height of the map.
double points;
double len;
fixed_t dx, dy;
double boxradius;
dx = abs(thing->x - bombspot->x);
dy = abs(thing->y - bombspot->y);
boxradius = double(thing->radius);
// The damage pattern is square, not circular.
len = double(dx > dy ? dx : dy);
if (bombspot->z < thing->z || bombspot->z >= thing->z + thing->height)
{
double dz;
if (bombspot->z > thing->z)
{
dz = double(bombspot->z - thing->z - thing->height);
}
else
{
dz = double(thing->z - bombspot->z);
}
if (len <= boxradius)
{
len = dz;
}
else
{
len -= boxradius;
len = sqrt(len*len + dz*dz);
}
}
else
{
len -= boxradius;
if (len < 0.f)
len = 0.f;
}
len /= FRACUNIT;
len = clamp<double>(len - (double)fulldamagedistance, 0, len);
points = bombdamagefloat * (1.f - len * bombdistancefloat);
if (thing == bombsource)
{
points = points * splashfactor;
}
points *= thing->GetClass()->Meta.GetMetaFixed(AMETA_RDFactor, FRACUNIT) / (double)FRACUNIT;
// points and bombdamage should be the same sign
if (((points * bombdamage) > 0) && P_CheckSight(thing, bombspot, SF_IGNOREVISIBILITY | SF_IGNOREWATERBOUNDARY))
{ // OK to damage; target is in direct path
double velz;
double thrust;
int damage = abs((int)points);
int newdam = damage;
if (!(flags & RADF_NODAMAGE))
newdam = P_DamageMobj(thing, bombspot, bombsource, damage, bombmod);
else if (thing->player == NULL && (!(flags & RADF_NOIMPACTDAMAGE) && !(thing->flags7 & MF7_DONTTHRUST)))
thing->flags2 |= MF2_BLASTED;
if (!(thing->flags & MF_ICECORPSE))
{
if (!(flags & RADF_NODAMAGE) && !(bombspot->flags3 & MF3_BLOODLESSIMPACT))
P_TraceBleed(newdam > 0 ? newdam : damage, thing, bombspot);
if ((flags & RADF_NODAMAGE) || !(bombspot->flags2 & MF2_NODMGTHRUST))
{
if (bombsource == NULL || !(bombsource->flags2 & MF2_NODMGTHRUST))
{
if (!(thing->flags7 & MF7_DONTTHRUST))
{
thrust = points * 0.5f / (double)thing->Mass;
if (bombsource == thing)
{
thrust *= selfthrustscale;
}
velz = (double)(thing->z + (thing->height >> 1) - bombspot->z) * thrust;
if (bombsource != thing)
{
velz *= 0.5f;
}
else
{
velz *= 0.8f;
}
angle_t ang = R_PointToAngle2(bombspot->x, bombspot->y, thing->x, thing->y) >> ANGLETOFINESHIFT;
thing->velx += fixed_t(finecosine[ang] * thrust);
thing->vely += fixed_t(finesine[ang] * thrust);
if (!(flags & RADF_NODAMAGE))
thing->velz += (fixed_t)velz; // this really doesn't work well
}
}
}
}
}
}
else
{
// [RH] Old code just for barrels
fixed_t dx, dy, dist;
dx = abs(thing->x - bombspot->x);
dy = abs(thing->y - bombspot->y);
dist = dx>dy ? dx : dy;
dist = (dist - thing->radius) >> FRACBITS;
if (dist < 0)
dist = 0;
if (dist >= bombdistance)
continue; // out of range
if (P_CheckSight(thing, bombspot, SF_IGNOREVISIBILITY | SF_IGNOREWATERBOUNDARY))
{ // OK to damage; target is in direct path
dist = clamp<int>(dist - fulldamagedistance, 0, dist);
int damage = Scale(bombdamage, bombdistance - dist, bombdistance);
damage = (int)((double)damage * splashfactor);
damage = Scale(damage, thing->GetClass()->Meta.GetMetaFixed(AMETA_RDFactor, FRACUNIT), FRACUNIT);
if (damage > 0)
{
int newdam = P_DamageMobj(thing, bombspot, bombsource, damage, bombmod);
P_TraceBleed(newdam > 0 ? newdam : damage, thing, bombspot);
}
}
}
}
}
//==========================================================================
//
// SECTOR HEIGHT CHANGING
// After modifying a sector's floor or ceiling height,
// call this routine to adjust the positions
// of all things that touch the sector.
//
// If anything doesn't fit anymore, true will be returned.
//
// [RH] If crushchange is non-negative, they will take the
// specified amount of damage as they are being crushed.
// If crushchange is negative, you should set the sector
// height back the way it was and call P_ChangeSector()
// again to undo the changes.
// Note that this is very different from the original
// true/false usage of crushchange! If you want regular
// DOOM crushing behavior set crushchange to 10 or -1
// if no crushing is desired.
//
//==========================================================================
struct FChangePosition
{
sector_t *sector;
int moveamt;
int crushchange;
bool nofit;
bool movemidtex;
};
TArray<AActor *> intersectors;
EXTERN_CVAR(Int, cl_bloodtype)
//=============================================================================
//
// P_AdjustFloorCeil
//
//=============================================================================
bool P_AdjustFloorCeil(AActor *thing, FChangePosition *cpos)
{
ActorFlags2 flags2 = thing->flags2 & MF2_PASSMOBJ;
FCheckPosition tm;
if ((thing->flags2 & MF2_PASSMOBJ) && (thing->flags3 & MF3_ISMONSTER))
{
tm.FromPMove = true;
}
if (cpos->movemidtex)
{
// From Eternity:
// ALL things must be treated as PASSMOBJ when moving
// 3DMidTex lines, otherwise you get stuck in them.
thing->flags2 |= MF2_PASSMOBJ;
}
bool isgood = P_CheckPosition(thing, thing->x, thing->y, tm);
thing->floorz = tm.floorz;
thing->ceilingz = tm.ceilingz;
thing->dropoffz = tm.dropoffz; // killough 11/98: remember dropoffs
thing->floorpic = tm.floorpic;
thing->floorsector = tm.floorsector;
thing->ceilingpic = tm.ceilingpic;
thing->ceilingsector = tm.ceilingsector;
// restore the PASSMOBJ flag but leave the other flags alone.
thing->flags2 = (thing->flags2 & ~MF2_PASSMOBJ) | flags2;
return isgood;
}
//=============================================================================
//
// P_FindAboveIntersectors
//
//=============================================================================
void P_FindAboveIntersectors(AActor *actor)
{
if (actor->flags & MF_NOCLIP)
return;
if (!(actor->flags & MF_SOLID))
return;
AActor *thing;
FBlockThingsIterator it(FBoundingBox(actor->x, actor->y, actor->radius));
while ((thing = it.Next()))
{
if (!thing->intersects(actor))
{
continue;
}
if (!(thing->flags & MF_SOLID))
{ // Can't hit thing
continue;
}
if (thing->flags & (MF_SPECIAL))
{ // [RH] Corpses and specials don't block moves
continue;
}
if (thing->flags & (MF_CORPSE))
{ // Corpses need a few more checks
if (!(actor->flags & MF_ICECORPSE))
continue;
}
if (thing == actor)
{ // Don't clip against self
continue;
}
if (!((thing->flags2 | actor->flags2) & MF2_PASSMOBJ) && !((thing->flags3 | actor->flags3) & MF3_ISMONSTER))
{
// Don't bother if both things don't have MF2_PASSMOBJ set and aren't monsters.
// These things would always block each other which in nearly every situation is
// not what is wanted here.
continue;
}
if (thing->z >= actor->z &&
thing->z <= actor->z + actor->height)
{ // Thing intersects above the base
intersectors.Push(thing);
}
}
}
//=============================================================================
//
// P_FindBelowIntersectors
//
//=============================================================================
void P_FindBelowIntersectors(AActor *actor)
{
if (actor->flags & MF_NOCLIP)
return;
if (!(actor->flags & MF_SOLID))
return;
AActor *thing;
FBlockThingsIterator it(FBoundingBox(actor->x, actor->y, actor->radius));
while ((thing = it.Next()))
{
if (!thing->intersects(actor))
{
continue;
}
if (!(thing->flags & MF_SOLID))
{ // Can't hit thing
continue;
}
if (thing->flags & (MF_SPECIAL))
{ // [RH] Corpses and specials don't block moves
continue;
}
if (thing->flags & (MF_CORPSE))
{ // Corpses need a few more checks
if (!(actor->flags & MF_ICECORPSE))
continue;
}
if (thing == actor)
{ // Don't clip against self
continue;
}
if (!((thing->flags2 | actor->flags2) & MF2_PASSMOBJ) && !((thing->flags3 | actor->flags3) & MF3_ISMONSTER))
{
// Don't bother if both things don't have MF2_PASSMOBJ set and aren't monsters.
// These things would always block each other which in nearly every situation is
// not what is wanted here.
continue;
}
if (thing->z + thing->height <= actor->z + actor->height &&
thing->z + thing->height > actor->z)
{ // Thing intersects below the base
intersectors.Push(thing);
}
}
}
//=============================================================================
//
// P_DoCrunch
//
//=============================================================================
void P_DoCrunch(AActor *thing, FChangePosition *cpos)
{
if (!(thing && thing->Grind(true) && cpos)) return;
cpos->nofit = true;
if ((cpos->crushchange > 0) && !(level.maptime & 3))
{
int newdam = P_DamageMobj(thing, NULL, NULL, cpos->crushchange, NAME_Crush);
// spray blood in a random direction
if (!(thing->flags2&(MF2_INVULNERABLE | MF2_DORMANT)))
{
if (!(thing->flags&MF_NOBLOOD))
{
PalEntry bloodcolor = thing->GetBloodColor();
const PClass *bloodcls = thing->GetBloodType();
P_TraceBleed(newdam > 0 ? newdam : cpos->crushchange, thing);
if (bloodcls != NULL)
{
AActor *mo;
mo = Spawn(bloodcls, thing->x, thing->y,
thing->z + thing->height / 2, ALLOW_REPLACE);
mo->velx = pr_crunch.Random2() << 12;
mo->vely = pr_crunch.Random2() << 12;
if (bloodcolor != 0 && !(mo->flags2 & MF2_DONTTRANSLATE))
{
mo->Translation = TRANSLATION(TRANSLATION_Blood, bloodcolor.a);
}
if (!(cl_bloodtype <= 1)) mo->renderflags |= RF_INVISIBLE;
}
angle_t an;
an = (M_Random() - 128) << 24;
if (cl_bloodtype >= 1)
{
P_DrawSplash2(32, thing->x, thing->y, thing->z + thing->height / 2, an, 2, bloodcolor);
}
}
if (thing->CrushPainSound != 0 && !S_GetSoundPlayingInfo(thing, thing->CrushPainSound))
{
S_Sound(thing, CHAN_VOICE, thing->CrushPainSound, 1.f, ATTN_NORM);
}
}
}
// keep checking (crush other things)
return;
}
//=============================================================================
//
// P_PushUp
//
// Returns 0 if thing fits, 1 if ceiling got in the way, or 2 if something
// above it didn't fit.
//=============================================================================
int P_PushUp(AActor *thing, FChangePosition *cpos)
{
unsigned int firstintersect = intersectors.Size();
unsigned int lastintersect;
int mymass = thing->Mass;
if (thing->z + thing->height > thing->ceilingz)
{
return 1;
}
// [GZ] Skip thing intersect test for THRUACTORS things.
if (thing->flags2 & MF2_THRUACTORS)
return 0;
P_FindAboveIntersectors(thing);
lastintersect = intersectors.Size();
for (; firstintersect < lastintersect; firstintersect++)
{
AActor *intersect = intersectors[firstintersect];
// [GZ] Skip this iteration for THRUSPECIES things
// Should there be MF2_THRUGHOST / MF3_GHOST checks there too for consistency?
// Or would that risk breaking established behavior? THRUGHOST, like MTHRUSPECIES,
// is normally for projectiles which would have exploded by now anyway...
if (thing->flags6 & MF6_THRUSPECIES && thing->GetSpecies() == intersect->GetSpecies())
continue;
if ((thing->flags & MF_MISSILE) && (intersect->flags2 & MF2_REFLECTIVE) && (intersect->flags7 & MF7_THRUREFLECT))
continue;
if (!(intersect->flags2 & MF2_PASSMOBJ) ||
(!(intersect->flags3 & MF3_ISMONSTER) && intersect->Mass > mymass) ||
(intersect->flags4 & MF4_ACTLIKEBRIDGE)
)
{
// Can't push bridges or things more massive than ourself
return 2;
}
fixed_t oldz;
oldz = intersect->z;
P_AdjustFloorCeil(intersect, cpos);
intersect->z = thing->z + thing->height + 1;
if (P_PushUp(intersect, cpos))
{ // Move blocked
P_DoCrunch(intersect, cpos);
intersect->z = oldz;
return 2;
}
}
return 0;
}
//=============================================================================
//
// P_PushDown
//
// Returns 0 if thing fits, 1 if floor got in the way, or 2 if something
// below it didn't fit.
//=============================================================================
int P_PushDown(AActor *thing, FChangePosition *cpos)
{
unsigned int firstintersect = intersectors.Size();
unsigned int lastintersect;
int mymass = thing->Mass;
if (thing->z <= thing->floorz)
{
return 1;
}
P_FindBelowIntersectors(thing);
lastintersect = intersectors.Size();
for (; firstintersect < lastintersect; firstintersect++)
{
AActor *intersect = intersectors[firstintersect];
if (!(intersect->flags2 & MF2_PASSMOBJ) ||
(!(intersect->flags3 & MF3_ISMONSTER) && intersect->Mass > mymass) ||
(intersect->flags4 & MF4_ACTLIKEBRIDGE)
)
{
// Can't push bridges or things more massive than ourself
return 2;
}
fixed_t oldz = intersect->z;
P_AdjustFloorCeil(intersect, cpos);
if (oldz > thing->z - intersect->height)
{ // Only push things down, not up.
intersect->z = thing->z - intersect->height;
if (P_PushDown(intersect, cpos))
{ // Move blocked
P_DoCrunch(intersect, cpos);
intersect->z = oldz;
return 2;
}
}
}
return 0;
}
//=============================================================================
//
// PIT_FloorDrop
//
//=============================================================================
void PIT_FloorDrop(AActor *thing, FChangePosition *cpos)
{
fixed_t oldfloorz = thing->floorz;
P_AdjustFloorCeil(thing, cpos);
if (oldfloorz == thing->floorz) return;
if (thing->flags4 & MF4_ACTLIKEBRIDGE) return; // do not move bridge things
if (thing->velz == 0 &&
(!(thing->flags & MF_NOGRAVITY) ||
(thing->z == oldfloorz && !(thing->flags & MF_NOLIFTDROP))))
{
fixed_t oldz = thing->z;
if ((thing->flags & MF_NOGRAVITY) || (thing->flags5 & MF5_MOVEWITHSECTOR) ||
(((cpos->sector->Flags & SECF_FLOORDROP) || cpos->moveamt < 9 * FRACUNIT)
&& thing->z - thing->floorz <= cpos->moveamt))
{
thing->z = thing->floorz;
P_CheckFakeFloorTriggers(thing, oldz);
}
}
else if ((thing->z != oldfloorz && !(thing->flags & MF_NOLIFTDROP)))
{
fixed_t oldz = thing->z;
if ((thing->flags & MF_NOGRAVITY) && (thing->flags6 & MF6_RELATIVETOFLOOR))
{
thing->z = thing->z - oldfloorz + thing->floorz;
P_CheckFakeFloorTriggers(thing, oldz);
}
}
}
//=============================================================================
//
// PIT_FloorRaise
//
//=============================================================================
void PIT_FloorRaise(AActor *thing, FChangePosition *cpos)
{
fixed_t oldfloorz = thing->floorz;
fixed_t oldz = thing->z;
P_AdjustFloorCeil(thing, cpos);
if (oldfloorz == thing->floorz) return;
// Move things intersecting the floor up
if (thing->z <= thing->floorz)
{
if (thing->flags4 & MF4_ACTLIKEBRIDGE)
{
cpos->nofit = true;
return; // do not move bridge things
}
intersectors.Clear();
thing->z = thing->floorz;
}
else
{
if ((thing->flags & MF_NOGRAVITY) && (thing->flags6 & MF6_RELATIVETOFLOOR))
{
intersectors.Clear();
thing->z = thing->z - oldfloorz + thing->floorz;
}
else return;
}
switch (P_PushUp(thing, cpos))
{
default:
P_CheckFakeFloorTriggers(thing, oldz);
break;
case 1:
P_DoCrunch(thing, cpos);
P_CheckFakeFloorTriggers(thing, oldz);
break;
case 2:
P_DoCrunch(thing, cpos);
thing->z = oldz;
break;
}
}
//=============================================================================
//
// PIT_CeilingLower
//
//=============================================================================
void PIT_CeilingLower(AActor *thing, FChangePosition *cpos)
{
bool onfloor;
onfloor = thing->z <= thing->floorz;
P_AdjustFloorCeil(thing, cpos);
if (thing->z + thing->height > thing->ceilingz)
{
if (thing->flags4 & MF4_ACTLIKEBRIDGE)
{
cpos->nofit = true;
return; // do not move bridge things
}
intersectors.Clear();
fixed_t oldz = thing->z;
if (thing->ceilingz - thing->height >= thing->floorz)
{
thing->z = thing->ceilingz - thing->height;
}
else
{
thing->z = thing->floorz;
}
switch (P_PushDown(thing, cpos))
{
case 2:
// intentional fall-through
case 1:
if (onfloor)
thing->z = thing->floorz;
P_DoCrunch(thing, cpos);
P_CheckFakeFloorTriggers(thing, oldz);
break;
default:
P_CheckFakeFloorTriggers(thing, oldz);
break;
}
}
}
//=============================================================================
//
// PIT_CeilingRaise
//
//=============================================================================
void PIT_CeilingRaise(AActor *thing, FChangePosition *cpos)
{
bool isgood = P_AdjustFloorCeil(thing, cpos);
if (thing->flags4 & MF4_ACTLIKEBRIDGE) return; // do not move bridge things
// For DOOM compatibility, only move things that are inside the floor.
// (or something else?) Things marked as hanging from the ceiling will
// stay where they are.
if (thing->z < thing->floorz &&
thing->z + thing->height >= thing->ceilingz - cpos->moveamt &&
!(thing->flags & MF_NOLIFTDROP))
{
fixed_t oldz = thing->z;
thing->z = thing->floorz;
if (thing->z + thing->height > thing->ceilingz)
{
thing->z = thing->ceilingz - thing->height;
}
P_CheckFakeFloorTriggers(thing, oldz);
}
else if ((thing->flags2 & MF2_PASSMOBJ) && !isgood && thing->z + thing->height < thing->ceilingz)
{
AActor *onmobj;
if (!P_TestMobjZ(thing, true, &onmobj) && onmobj->z <= thing->z)
{
thing->z = MIN(thing->ceilingz - thing->height,
onmobj->z + onmobj->height);
}
}
}
//=============================================================================
//
// P_ChangeSector [RH] Was P_CheckSector in BOOM
//
// jff 3/19/98 added to just check monsters on the periphery
// of a moving sector instead of all in bounding box of the
// sector. Both more accurate and faster.
//
//=============================================================================
bool P_ChangeSector(sector_t *sector, int crunch, int amt, int floorOrCeil, bool isreset)
{
FChangePosition cpos;
void(*iterator)(AActor *, FChangePosition *);
void(*iterator2)(AActor *, FChangePosition *) = NULL;
msecnode_t *n;
cpos.nofit = false;
cpos.crushchange = crunch;
cpos.moveamt = abs(amt);
cpos.movemidtex = false;
cpos.sector = sector;
// Also process all sectors that have 3D floors transferred from the
// changed sector.
if (sector->e->XFloor.attached.Size())
{
unsigned i;
sector_t* sec;
// Use different functions for the four different types of sector movement.
// for 3D-floors the meaning of floor and ceiling is inverted!!!
if (floorOrCeil == 1)
{
iterator = (amt >= 0) ? PIT_FloorRaise : PIT_FloorDrop;
}
else
{
iterator = (amt >= 0) ? PIT_CeilingRaise : PIT_CeilingLower;
}
for (i = 0; i < sector->e->XFloor.attached.Size(); i++)
{
sec = sector->e->XFloor.attached[i];
P_Recalculate3DFloors(sec); // Must recalculate the 3d floor and light lists
// no thing checks for attached sectors because of heightsec
if (sec->heightsec == sector) continue;
for (n = sec->touching_thinglist; n; n = n->m_snext) n->visited = false;
do
{
for (n = sec->touching_thinglist; n; n = n->m_snext)
{
if (!n->visited)
{
n->visited = true;
if (!(n->m_thing->flags & MF_NOBLOCKMAP) || //jff 4/7/98 don't do these
(n->m_thing->flags5 & MF5_MOVEWITHSECTOR))
{
iterator(n->m_thing, &cpos);
}
break;
}
}
} while (n);
}
}
P_Recalculate3DFloors(sector); // Must recalculate the 3d floor and light lists
// [RH] Use different functions for the four different types of sector
// movement.
switch (floorOrCeil)
{
case 0:
// floor
iterator = (amt < 0) ? PIT_FloorDrop : PIT_FloorRaise;
break;
case 1:
// ceiling
iterator = (amt < 0) ? PIT_CeilingLower : PIT_CeilingRaise;
break;
case 2:
// 3dmidtex
// This must check both floor and ceiling
iterator = (amt < 0) ? PIT_FloorDrop : PIT_FloorRaise;
iterator2 = (amt < 0) ? PIT_CeilingLower : PIT_CeilingRaise;
cpos.movemidtex = true;
break;
default:
// invalid
assert(floorOrCeil > 0 && floorOrCeil < 2);
return false;
}
// killough 4/4/98: scan list front-to-back until empty or exhausted,
// restarting from beginning after each thing is processed. Avoids
// crashes, and is sure to examine all things in the sector, and only
// the things which are in the sector, until a steady-state is reached.
// Things can arbitrarily be inserted and removed and it won't mess up.
//
// killough 4/7/98: simplified to avoid using complicated counter
// Mark all things invalid
for (n = sector->touching_thinglist; n; n = n->m_snext)
n->visited = false;
do
{
for (n = sector->touching_thinglist; n; n = n->m_snext) // go through list
{
if (!n->visited) // unprocessed thing found
{
n->visited = true; // mark thing as processed
if (!(n->m_thing->flags & MF_NOBLOCKMAP) || //jff 4/7/98 don't do these
(n->m_thing->flags5 & MF5_MOVEWITHSECTOR))
{
iterator(n->m_thing, &cpos); // process it
if (iterator2 != NULL) iterator2(n->m_thing, &cpos);
}
break; // exit and start over
}
}
} while (n); // repeat from scratch until all things left are marked valid
if (!cpos.nofit && !isreset /* && sector->MoreFlags & (SECF_UNDERWATERMASK)*/)
{
// If this is a control sector for a deep water transfer, all actors in affected
// sectors need to have their waterlevel information updated and if applicable,
// execute appropriate sector actions.
// Only check if the sector move was successful.
TArray<sector_t *> & secs = sector->e->FakeFloor.Sectors;
for (unsigned i = 0; i < secs.Size(); i++)
{
sector_t * s = secs[i];
for (n = s->touching_thinglist; n; n = n->m_snext)
n->visited = false;
do
{
for (n = s->touching_thinglist; n; n = n->m_snext) // go through list
{
if (!n->visited && n->m_thing->Sector == s) // unprocessed thing found
{
n->visited = true; // mark thing as processed
n->m_thing->UpdateWaterLevel(n->m_thing->z, false);
P_CheckFakeFloorTriggers(n->m_thing, n->m_thing->z - amt);
}
}
} while (n); // repeat from scratch until all things left are marked valid
}
}
return cpos.nofit;
}
//=============================================================================
// phares 3/21/98
//
// Maintain a freelist of msecnode_t's to reduce memory allocs and frees.
//=============================================================================
msecnode_t *headsecnode = NULL;
//=============================================================================
//
// P_GetSecnode
//
// Retrieve a node from the freelist. The calling routine
// should make sure it sets all fields properly.
//
//=============================================================================
msecnode_t *P_GetSecnode()
{
msecnode_t *node;
if (headsecnode)
{
node = headsecnode;
headsecnode = headsecnode->m_snext;
}
else
{
node = (msecnode_t *)M_Malloc(sizeof(*node));
}
return node;
}
//=============================================================================
//
// P_PutSecnode
//
// Returns a node to the freelist.
//
//=============================================================================
void P_PutSecnode(msecnode_t *node)
{
node->m_snext = headsecnode;
headsecnode = node;
}
//=============================================================================
// phares 3/16/98
//
// P_AddSecnode
//
// Searches the current list to see if this sector is
// already there. If not, it adds a sector node at the head of the list of
// sectors this object appears in. This is called when creating a list of
// nodes that will get linked in later. Returns a pointer to the new node.
//
//=============================================================================
msecnode_t *P_AddSecnode(sector_t *s, AActor *thing, msecnode_t *nextnode)
{
msecnode_t *node;
if (s == 0)
{
I_FatalError("AddSecnode of 0 for %s\n", thing->_StaticType.TypeName.GetChars());
}
node = nextnode;
while (node)
{
if (node->m_sector == s) // Already have a node for this sector?
{
node->m_thing = thing; // Yes. Setting m_thing says 'keep it'.
return nextnode;
}
node = node->m_tnext;
}
// Couldn't find an existing node for this sector. Add one at the head
// of the list.
node = P_GetSecnode();
// killough 4/4/98, 4/7/98: mark new nodes unvisited.
node->visited = 0;
node->m_sector = s; // sector
node->m_thing = thing; // mobj
node->m_tprev = NULL; // prev node on Thing thread
node->m_tnext = nextnode; // next node on Thing thread
if (nextnode)
nextnode->m_tprev = node; // set back link on Thing
// Add new node at head of sector thread starting at s->touching_thinglist
node->m_sprev = NULL; // prev node on sector thread
node->m_snext = s->touching_thinglist; // next node on sector thread
if (s->touching_thinglist)
node->m_snext->m_sprev = node;
s->touching_thinglist = node;
return node;
}
//=============================================================================
//
// P_DelSecnode
//
// Deletes a sector node from the list of
// sectors this object appears in. Returns a pointer to the next node
// on the linked list, or NULL.
//
//=============================================================================
msecnode_t *P_DelSecnode(msecnode_t *node)
{
msecnode_t* tp; // prev node on thing thread
msecnode_t* tn; // next node on thing thread
msecnode_t* sp; // prev node on sector thread
msecnode_t* sn; // next node on sector thread
if (node)
{
// Unlink from the Thing thread. The Thing thread begins at
// sector_list and not from AActor->touching_sectorlist.
tp = node->m_tprev;
tn = node->m_tnext;
if (tp)
tp->m_tnext = tn;
if (tn)
tn->m_tprev = tp;
// Unlink from the sector thread. This thread begins at
// sector_t->touching_thinglist.
sp = node->m_sprev;
sn = node->m_snext;
if (sp)
sp->m_snext = sn;
else
node->m_sector->touching_thinglist = sn;
if (sn)
sn->m_sprev = sp;
// Return this node to the freelist
P_PutSecnode(node);
return tn;
}
return NULL;
} // phares 3/13/98
//=============================================================================
//
// P_DelSector_List
//
// Deletes the sector_list and NULLs it.
//
//=============================================================================
void P_DelSector_List()
{
if (sector_list != NULL)
{
P_DelSeclist(sector_list);
sector_list = NULL;
}
}
//=============================================================================
//
// P_DelSeclist
//
// Delete an entire sector list
//
//=============================================================================
void P_DelSeclist(msecnode_t *node)
{
while (node)
node = P_DelSecnode(node);
}
//=============================================================================
// phares 3/14/98
//
// P_CreateSecNodeList
//
// Alters/creates the sector_list that shows what sectors the object resides in
//
//=============================================================================
void P_CreateSecNodeList(AActor *thing, fixed_t x, fixed_t y)
{
msecnode_t *node;
// First, clear out the existing m_thing fields. As each node is
// added or verified as needed, m_thing will be set properly. When
// finished, delete all nodes where m_thing is still NULL. These
// represent the sectors the Thing has vacated.
node = sector_list;
while (node)
{
node->m_thing = NULL;
node = node->m_tnext;
}
FBoundingBox box(thing->x, thing->y, thing->radius);
FBlockLinesIterator it(box);
line_t *ld;
while ((ld = it.Next()))
{
if (box.Right() <= ld->bbox[BOXLEFT] ||
box.Left() >= ld->bbox[BOXRIGHT] ||
box.Top() <= ld->bbox[BOXBOTTOM] ||
box.Bottom() >= ld->bbox[BOXTOP])
continue;
if (box.BoxOnLineSide(ld) != -1)
continue;
// This line crosses through the object.
// Collect the sector(s) from the line and add to the
// sector_list you're examining. If the Thing ends up being
// allowed to move to this position, then the sector_list
// will be attached to the Thing's AActor at touching_sectorlist.
sector_list = P_AddSecnode(ld->frontsector, thing, sector_list);
// Don't assume all lines are 2-sided, since some Things
// like MT_TFOG are allowed regardless of whether their radius takes
// them beyond an impassable linedef.
// killough 3/27/98, 4/4/98:
// Use sidedefs instead of 2s flag to determine two-sidedness.
if (ld->backsector)
sector_list = P_AddSecnode(ld->backsector, thing, sector_list);
}
// Add the sector of the (x,y) point to sector_list.
sector_list = P_AddSecnode(thing->Sector, thing, sector_list);
// Now delete any nodes that won't be used. These are the ones where
// m_thing is still NULL.
node = sector_list;
while (node)
{
if (node->m_thing == NULL)
{
if (node == sector_list)
sector_list = node->m_tnext;
node = P_DelSecnode(node);
}
else
{
node = node->m_tnext;
}
}
}
//==========================================================================
//
//
//
//==========================================================================
void SpawnShootDecal(AActor *t1, const FTraceResults &trace)
{
FDecalBase *decalbase = NULL;
if (t1->player != NULL && t1->player->ReadyWeapon != NULL)
{
decalbase = t1->player->ReadyWeapon->GetDefault()->DecalGenerator;
}
else
{
decalbase = t1->DecalGenerator;
}
if (decalbase != NULL)
{
DImpactDecal::StaticCreate(decalbase->GetDecal(),
trace.X, trace.Y, trace.Z, trace.Line->sidedef[trace.Side], trace.ffloor);
}
}
//==========================================================================
//
//
//
//==========================================================================
static void SpawnDeepSplash(AActor *t1, const FTraceResults &trace, AActor *puff,
fixed_t vx, fixed_t vy, fixed_t vz, fixed_t shootz, bool ffloor)
{
const secplane_t *plane;
if (ffloor && trace.Crossed3DWater)
plane = trace.Crossed3DWater->top.plane;
else if (trace.CrossedWater && trace.CrossedWater->heightsec)
plane = &trace.CrossedWater->heightsec->floorplane;
else return;
fixed_t num, den, hitdist;
den = TMulScale16(plane->a, vx, plane->b, vy, plane->c, vz);
if (den != 0)
{
num = TMulScale16(plane->a, t1->x, plane->b, t1->y, plane->c, shootz) + plane->d;
hitdist = FixedDiv(-num, den);
if (hitdist >= 0 && hitdist <= trace.Distance)
{
fixed_t hitx = t1->x + FixedMul(vx, hitdist);
fixed_t hity = t1->y + FixedMul(vy, hitdist);
fixed_t hitz = shootz + FixedMul(vz, hitdist);
P_HitWater(puff != NULL ? puff : t1, P_PointInSector(hitx, hity), hitx, hity, hitz);
}
}
}
//=============================================================================
//
// P_ActivateThingSpecial
//
// Handles the code for things activated by death, USESPECIAL or BUMPSPECIAL
//
//=============================================================================
bool P_ActivateThingSpecial(AActor * thing, AActor * trigger, bool death)
{
bool res = false;
// Target switching mechanism
if (thing->activationtype & THINGSPEC_ThingTargets) thing->target = trigger;
if (thing->activationtype & THINGSPEC_TriggerTargets) trigger->target = thing;
// State change mechanism. The thing needs to be not dead and to have at least one of the relevant flags
if (!death && (thing->activationtype & (THINGSPEC_Activate | THINGSPEC_Deactivate | THINGSPEC_Switch)))
{
// If a switchable thing does not know whether it should be activated
// or deactivated, the default is to activate it.
if ((thing->activationtype & THINGSPEC_Switch)
&& !(thing->activationtype & (THINGSPEC_Activate | THINGSPEC_Deactivate)))
{
thing->activationtype |= THINGSPEC_Activate;
}
// Can it be activated?
if (thing->activationtype & THINGSPEC_Activate)
{
thing->activationtype &= ~THINGSPEC_Activate; // Clear flag
if (thing->activationtype & THINGSPEC_Switch) // Set other flag if switching
thing->activationtype |= THINGSPEC_Deactivate;
thing->Activate(trigger);
res = true;
}
// If not, can it be deactivated?
else if (thing->activationtype & THINGSPEC_Deactivate)
{
thing->activationtype &= ~THINGSPEC_Deactivate; // Clear flag
if (thing->activationtype & THINGSPEC_Switch) // Set other flag if switching
thing->activationtype |= THINGSPEC_Activate;
thing->Deactivate(trigger);
res = true;
}
}
// Run the special, if any
if (thing->special)
{
res = !!P_ExecuteSpecial(thing->special, NULL,
// TriggerActs overrides the level flag, which only concerns thing activated by death
(((death && level.flags & LEVEL_ACTOWNSPECIAL && !(thing->activationtype & THINGSPEC_TriggerActs))
|| (thing->activationtype & THINGSPEC_ThingActs)) // Who triggers?
? thing : trigger),
false, thing->args[0], thing->args[1], thing->args[2], thing->args[3], thing->args[4]);
// Clears the special if it was run on thing's death or if flag is set.
if (death || (thing->activationtype & THINGSPEC_ClearSpecial && res)) thing->special = 0;
}
// Returns the result
return res;
}
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