gzdoom/src/p_3dmidtex.cpp

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/*
** p_3dmidtex.cpp
**
** Eternity-style 3D-midtex handling
** (No original Eternity code here!)
**
**---------------------------------------------------------------------------
** Copyright 2008 Christoph Oelckers
** All rights reserved.
**
** Redistribution and use in source and binary forms, with or without
** modification, are permitted provided that the following conditions
** are met:
**
** 1. Redistributions of source code must retain the above copyright
** notice, this list of conditions and the following disclaimer.
** 2. Redistributions in binary form must reproduce the above copyright
** notice, this list of conditions and the following disclaimer in the
** documentation and/or other materials provided with the distribution.
** 3. The name of the author may not be used to endorse or promote products
** derived from this software without specific prior written permission.
**
** THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
** IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
** OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
** IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
** INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
** NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
** DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
** THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
** (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
** THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
**---------------------------------------------------------------------------
**
*/
#include "templates.h"
#include "p_3dmidtex.h"
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#include "p_local.h"
#include "p_terrain.h"
#include "p_maputl.h"
#include "p_spec.h"
#include "g_levellocals.h"
#include "actor.h"
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//============================================================================
//
// P_Scroll3dMidtex
//
// Scrolls all sidedefs belonging to 3dMidtex lines attached to this sector
//
//============================================================================
bool P_Scroll3dMidtex(sector_t *sector, int crush, double move, bool ceiling, bool instant)
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{
extsector_t::midtex::plane &scrollplane = ceiling? sector->e->Midtex.Ceiling : sector->e->Midtex.Floor;
// First step: Change all lines' texture offsets
for(unsigned i = 0; i < scrollplane.AttachedLines.Size(); i++)
{
line_t *l = scrollplane.AttachedLines[i];
l->sidedef[0]->AddTextureYOffset(side_t::mid, move);
l->sidedef[1]->AddTextureYOffset(side_t::mid, move);
}
// Second step: Check all sectors whether the move is ok.
bool res = false;
for(unsigned i = 0; i < scrollplane.AttachedSectors.Size(); i++)
{
res |= P_ChangeSector(scrollplane.AttachedSectors[i], crush, move, 2, true, instant);
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}
return !res;
}
//============================================================================
//
// P_Start3DMidtexInterpolations
//
// Starts interpolators for every sidedef that is being changed by moving
// this sector
//
//============================================================================
void P_Start3dMidtexInterpolations(TArray<DInterpolation *> &list, sector_t *sector, bool ceiling)
{
extsector_t::midtex::plane &scrollplane = ceiling? sector->e->Midtex.Ceiling : sector->e->Midtex.Floor;
for(unsigned i = 0; i < scrollplane.AttachedLines.Size(); i++)
{
line_t *l = scrollplane.AttachedLines[i];
list.Push(l->sidedef[0]->SetInterpolation(side_t::mid));
list.Push(l->sidedef[1]->SetInterpolation(side_t::mid));
}
}
//============================================================================
//
// P_Attach3dMidtexLinesToSector
//
// Attaches 3dMidtex lines to a sector.
// If lineid is != 0, all lines with the matching line id will be added
// If tag is != 0, all lines touching a sector with the matching tag will be added
// If both are != 0, all lines with the matching line id that touch a sector with
// the matching tag will be added.
//
//============================================================================
void P_Attach3dMidtexLinesToSector(sector_t *sector, int lineid, int tag, bool ceiling)
{
int v;
if (lineid == 0 && tag == 0)
{
// invalid set of parameters
return;
}
extsector_t::midtex::plane &scrollplane = ceiling? sector->e->Midtex.Ceiling : sector->e->Midtex.Floor;
// Bit arrays that mark whether a line or sector is to be attached.
uint8_t *found_lines = new uint8_t[(level.lines.Size()+7)/8];
uint8_t *found_sectors = new uint8_t[(level.sectors.Size()+7)/8];
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memset(found_lines, 0, sizeof (uint8_t) * ((level.lines.Size()+7)/8));
memset(found_sectors, 0, sizeof (uint8_t) * ((level.sectors.Size()+7)/8));
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// mark all lines and sectors that are already attached to this one
// and clear the arrays. The old data will be re-added automatically
// from the marker arrays.
for (unsigned i=0; i < scrollplane.AttachedLines.Size(); i++)
{
int line = scrollplane.AttachedLines[i]->Index();
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found_lines[line>>3] |= 1 << (line&7);
}
for (unsigned i=0; i < scrollplane.AttachedSectors.Size(); i++)
{
int sec = scrollplane.AttachedSectors[i]->Index();
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found_sectors[sec>>3] |= 1 << (sec&7);
}
scrollplane.AttachedLines.Clear();
scrollplane.AttachedSectors.Clear();
if (tag == 0)
{
FLineIdIterator itr(lineid);
int line;
while ((line = itr.Next()) >= 0)
{
line_t *ln = &level.lines[line];
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if (ln->frontsector == NULL || ln->backsector == NULL || !(ln->flags & ML_3DMIDTEX))
{
// Only consider two-sided lines with the 3DMIDTEX flag
continue;
}
found_lines[line>>3] |= 1 << (line&7);
}
}
else
{
FSectorTagIterator it(tag);
int sec;
while ((sec = it.Next()) >= 0)
{
for (auto ln : level.sectors[sec].Lines)
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{
if (lineid != 0 && !tagManager.LineHasID(ln, lineid)) continue;
if (ln->frontsector == NULL || ln->backsector == NULL || !(ln->flags & ML_3DMIDTEX))
{
// Only consider two-sided lines with the 3DMIDTEX flag
continue;
}
int lineno = ln->Index();
found_lines[lineno >> 3] |= 1 << (lineno & 7);
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}
}
}
for(unsigned i=0; i < level.lines.Size(); i++)
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{
if (found_lines[i>>3] & (1 << (i&7)))
{
auto &line = level.lines[i];
scrollplane.AttachedLines.Push(&line);
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v = line.frontsector->Index();
assert(v < (int)level.sectors.Size());
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found_sectors[v>>3] |= 1 << (v&7);
v = line.backsector->Index();
assert(v < (int)level.sectors.Size());
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found_sectors[v>>3] |= 1 << (v&7);
}
}
for (unsigned i=0; i < level.sectors.Size(); i++)
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{
if (found_sectors[i>>3] & (1 << (i&7)))
{
scrollplane.AttachedSectors.Push(&level.sectors[i]);
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}
}
delete[] found_lines;
delete[] found_sectors;
}
//============================================================================
//
// P_GetMidTexturePosition
//
// Retrieves top and bottom of the current line's mid texture.
//
//============================================================================
bool P_GetMidTexturePosition(const line_t *line, int sideno, double *ptextop, double *ptexbot)
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{
if (line->sidedef[0]==NULL || line->sidedef[1]==NULL) return false;
side_t *side = line->sidedef[sideno];
FTextureID texnum = side->GetTexture(side_t::mid);
if (!texnum.isValid()) return false;
FTexture * tex= TexMan(texnum);
if (!tex) return false;
double totalscale = fabs(side->GetTextureYScale(side_t::mid)) * tex->GetScaleY();
double y_offset = side->GetTextureYOffset(side_t::mid);
double textureheight = tex->GetHeight() / totalscale;
if (totalscale != 1. && !tex->bWorldPanning)
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{
y_offset /= totalscale;
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}
if(line->flags & ML_DONTPEGBOTTOM)
{
*ptexbot = y_offset +
MAX(line->frontsector->GetPlaneTexZ(sector_t::floor), line->backsector->GetPlaneTexZ(sector_t::floor));
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*ptextop = *ptexbot + textureheight;
}
else
{
*ptextop = y_offset +
MIN(line->frontsector->GetPlaneTexZ(sector_t::ceiling), line->backsector->GetPlaneTexZ(sector_t::ceiling));
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*ptexbot = *ptextop - textureheight;
}
return true;
}
//============================================================================
//
// P_LineOpening_3dMidtex
//
// 3dMidtex part of P_LineOpening
//
//============================================================================
bool P_LineOpening_3dMidtex(AActor *thing, const line_t *linedef, FLineOpening &open, bool restrict)
{
// [TP] Impassible-like 3dmidtextures do not block missiles
if ((linedef->flags & ML_3DMIDTEX_IMPASS)
&& (thing->flags & MF_MISSILE || thing->BounceFlags & BOUNCE_MBF))
{
return false;
}
double tt, tb;
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open.abovemidtex = false;
if (P_GetMidTexturePosition(linedef, 0, &tt, &tb))
{
if (thing->Center() < (tt + tb)/2)
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{
if (tb < open.top)
{
open.top = tb;
open.ceilingpic = linedef->sidedef[0]->GetTexture(side_t::mid);
}
}
else
{
if (tt > open.bottom && (!restrict || thing->Z() >= tt))
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{
open.bottom = tt;
open.abovemidtex = true;
open.floorpic = linedef->sidedef[0]->GetTexture(side_t::mid);
open.floorterrain = TerrainTypes[open.floorpic];
open.frontfloorplane.SetAtHeight(tt, sector_t::floor);
open.backfloorplane.SetAtHeight(tt, sector_t::floor);
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}
// returns true if it touches the midtexture
return (fabs(thing->Z() - tt) <= thing->MaxStepHeight);
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}
}
return false;
/* still have to figure out what this code from Eternity means...
if((linedef->flags & ML_BLOCKMONSTERS) &&
!(mo->flags & (MF_FLOAT | MF_DROPOFF)) &&
fabs(mo->Z() - tt) <= 24)
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{
opentop = openbottom;
openrange = 0;
return;
}
*/
}