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qzdoom-gpl/src/r_things.cpp
Christoph Oelckers a85a8c1465 - changed mirror handling so that it works without attaching a portal to the mirror line and removed line_t::portal_mirror member. 
- did some cleanup on the portal interface on linedefs: All checks should go through isLinePortal (gameplay related) and isVisualPortal (renderer related) which then can decide on the actual data what to return.
- removed portal_passive because it won't survive the upcoming refactoring.
- removed all direct access to portal members of line_t.
- always use the precise (and fast) version of P_PointOnLineSide inside the renderer.
2016-02-05 16:14:45 +01:00

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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:
// Refresh of things, i.e. objects represented by sprites.
//
// This file contains some code from the Build Engine.
//
// "Build Engine & Tools" Copyright (c) 1993-1997 Ken Silverman
// Ken Silverman's official web site: "http://www.advsys.net/ken"
// See the included license file "BUILDLIC.TXT" for license info.
//
//-----------------------------------------------------------------------------
#include <stdio.h>
#include <stdlib.h>
#include <algorithm>
#include "p_lnspec.h"
#include "templates.h"
#include "doomdef.h"
#include "m_swap.h"
#include "i_system.h"
#include "w_wad.h"
#include "r_local.h"
#include "c_console.h"
#include "c_cvars.h"
#include "c_dispatch.h"
#include "doomstat.h"
#include "v_video.h"
#include "sc_man.h"
#include "s_sound.h"
#include "sbar.h"
#include "gi.h"
#include "r_sky.h"
#include "cmdlib.h"
#include "g_level.h"
#include "d_net.h"
#include "colormatcher.h"
#include "d_netinf.h"
#include "p_effect.h"
#include "r_bsp.h"
#include "r_plane.h"
#include "r_segs.h"
#include "r_3dfloors.h"
#include "v_palette.h"
#include "r_data/r_translate.h"
#include "r_data/colormaps.h"
#include "r_data/voxels.h"
#include "p_local.h"
// [RH] A c-buffer. Used for keeping track of offscreen voxel spans.
struct FCoverageBuffer
{
struct Span
{
Span *NextSpan;
short Start, Stop;
};
FCoverageBuffer(int size);
~FCoverageBuffer();
void Clear();
void InsertSpan(int listnum, int start, int stop);
Span *AllocSpan();
FMemArena SpanArena;
Span **Spans; // [0..NumLists-1] span lists
Span *FreeSpans;
unsigned int NumLists;
};
extern fixed_t globaluclip, globaldclip;
#define MINZ (2048*4)
#define BASEYCENTER (100)
EXTERN_CVAR (Bool, st_scale)
EXTERN_CVAR(Bool, r_shadercolormaps)
EXTERN_CVAR(Int, r_drawfuzz)
EXTERN_CVAR(Bool, r_deathcamera);
//
// Sprite rotation 0 is facing the viewer,
// rotation 1 is one angle turn CLOCKWISE around the axis.
// This is not the same as the angle,
// which increases counter clockwise (protractor).
//
fixed_t pspritexscale;
fixed_t pspriteyscale;
fixed_t pspritexiscale;
fixed_t sky1scale; // [RH] Sky 1 scale factor
fixed_t sky2scale; // [RH] Sky 2 scale factor
vissprite_t *VisPSprites[NUMPSPRITES];
int VisPSpritesX1[NUMPSPRITES];
FDynamicColormap *VisPSpritesBaseColormap[NUMPSPRITES];
static int spriteshade;
FTexture *WallSpriteTile;
// constant arrays
// used for psprite clipping and initializing clipping
short zeroarray[MAXWIDTH];
short screenheightarray[MAXWIDTH];
EXTERN_CVAR (Bool, r_drawplayersprites)
EXTERN_CVAR (Bool, r_drawvoxels)
//
// INITIALIZATION FUNCTIONS
//
int OffscreenBufferWidth, OffscreenBufferHeight;
BYTE *OffscreenColorBuffer;
FCoverageBuffer *OffscreenCoverageBuffer;
//
// GAME FUNCTIONS
//
int MaxVisSprites;
vissprite_t **vissprites;
vissprite_t **firstvissprite;
vissprite_t **vissprite_p;
vissprite_t **lastvissprite;
int newvissprite;
bool DrewAVoxel;
static vissprite_t **spritesorter;
static int spritesortersize = 0;
static int vsprcount;
static void R_ProjectWallSprite(AActor *thing, fixed_t fx, fixed_t fy, fixed_t fz, FTextureID picnum, fixed_t xscale, fixed_t yscale, INTBOOL flip);
void R_DeinitSprites()
{
// Free vissprites
for (int i = 0; i < MaxVisSprites; ++i)
{
delete vissprites[i];
}
free (vissprites);
vissprites = NULL;
vissprite_p = lastvissprite = NULL;
MaxVisSprites = 0;
// Free vissprites sorter
if (spritesorter != NULL)
{
delete[] spritesorter;
spritesortersize = 0;
spritesorter = NULL;
}
// Free offscreen buffer
if (OffscreenColorBuffer != NULL)
{
delete[] OffscreenColorBuffer;
OffscreenColorBuffer = NULL;
}
if (OffscreenCoverageBuffer != NULL)
{
delete OffscreenCoverageBuffer;
OffscreenCoverageBuffer = NULL;
}
OffscreenBufferHeight = OffscreenBufferWidth = 0;
}
//
// R_ClearSprites
// Called at frame start.
//
void R_ClearSprites (void)
{
vissprite_p = firstvissprite;
DrewAVoxel = false;
}
//
// R_NewVisSprite
//
vissprite_t *R_NewVisSprite (void)
{
if (vissprite_p == lastvissprite)
{
ptrdiff_t firstvisspritenum = firstvissprite - vissprites;
ptrdiff_t prevvisspritenum = vissprite_p - vissprites;
MaxVisSprites = MaxVisSprites ? MaxVisSprites * 2 : 128;
vissprites = (vissprite_t **)M_Realloc (vissprites, MaxVisSprites * sizeof(vissprite_t));
lastvissprite = &vissprites[MaxVisSprites];
firstvissprite = &vissprites[firstvisspritenum];
vissprite_p = &vissprites[prevvisspritenum];
DPrintf ("MaxVisSprites increased to %d\n", MaxVisSprites);
// Allocate sprites from the new pile
for (vissprite_t **p = vissprite_p; p < lastvissprite; ++p)
{
*p = new vissprite_t;
}
}
vissprite_p++;
return *(vissprite_p-1);
}
//
// R_DrawMaskedColumn
// Used for sprites and masked mid textures.
// Masked means: partly transparent, i.e. stored
// in posts/runs of opaque pixels.
//
short* mfloorclip;
short* mceilingclip;
fixed_t spryscale;
fixed_t sprtopscreen;
bool sprflipvert;
void R_DrawMaskedColumn (const BYTE *column, const FTexture::Span *span)
{
while (span->Length != 0)
{
const int length = span->Length;
const int top = span->TopOffset;
// calculate unclipped screen coordinates for post
dc_yl = (sprtopscreen + spryscale * top) >> FRACBITS;
dc_yh = (sprtopscreen + spryscale * (top + length) - FRACUNIT) >> FRACBITS;
if (sprflipvert)
{
swapvalues (dc_yl, dc_yh);
}
if (dc_yh >= mfloorclip[dc_x])
{
dc_yh = mfloorclip[dc_x] - 1;
}
if (dc_yl < mceilingclip[dc_x])
{
dc_yl = mceilingclip[dc_x];
}
if (dc_yl <= dc_yh)
{
if (sprflipvert)
{
dc_texturefrac = (dc_yl*dc_iscale) - (top << FRACBITS)
- FixedMul (centeryfrac, dc_iscale) - dc_texturemid;
const fixed_t maxfrac = length << FRACBITS;
while (dc_texturefrac >= maxfrac)
{
if (++dc_yl > dc_yh)
goto nextpost;
dc_texturefrac += dc_iscale;
}
fixed_t endfrac = dc_texturefrac + (dc_yh-dc_yl)*dc_iscale;
while (endfrac < 0)
{
if (--dc_yh < dc_yl)
goto nextpost;
endfrac -= dc_iscale;
}
}
else
{
dc_texturefrac = dc_texturemid - (top << FRACBITS)
+ (dc_yl*dc_iscale) - FixedMul (centeryfrac-FRACUNIT, dc_iscale);
while (dc_texturefrac < 0)
{
if (++dc_yl > dc_yh)
goto nextpost;
dc_texturefrac += dc_iscale;
}
fixed_t endfrac = dc_texturefrac + (dc_yh-dc_yl)*dc_iscale;
const fixed_t maxfrac = length << FRACBITS;
if (dc_yh < mfloorclip[dc_x]-1 && endfrac < maxfrac - dc_iscale)
{
dc_yh++;
}
else while (endfrac >= maxfrac)
{
if (--dc_yh < dc_yl)
goto nextpost;
endfrac -= dc_iscale;
}
}
dc_source = column + top;
dc_dest = ylookup[dc_yl] + dc_x + dc_destorg;
dc_count = dc_yh - dc_yl + 1;
colfunc ();
}
nextpost:
span++;
}
}
// [ZZ]
// R_ClipSpriteColumnWithPortals
//
static inline bool R_ClipSpriteColumnWithPortals (fixed_t x, fixed_t y, vissprite_t* spr)
{
// [ZZ] 10.01.2016: don't clip sprites from the root of a skybox.
if (CurrentPortalInSkybox)
return false;
for (drawseg_t* seg = ds_p; seg-- > firstdrawseg; ) // copied code from killough below
{
// ignore segs from other portals
if (seg->CurrentPortalUniq != CurrentPortalUniq)
continue;
// I don't know what makes this happen (some old top-down portal code or possibly skybox code? something adds null lines...)
// crashes at the first frame of the first map of Action2.wad
if (!seg->curline) continue;
line_t* line = seg->curline->linedef;
// ignore minisegs from GL nodes.
if (!line) continue;
// check if this line will clip sprites to itself
if (!line->isVisualPortal() && line->special != Line_Mirror)
continue;
// don't clip sprites with portal's back side (it's transparent)
if (seg->curline->sidedef != line->sidedef[0])
continue;
// don't clip if the sprite is in front of the portal
if (!P_PointOnLineSide(x, y, line))
continue;
// now if current column is covered by this drawseg, we clip it away
if ((dc_x >= seg->x1) && (dc_x < seg->x2))
return true;
}
return false;
}
//
// R_DrawVisSprite
// mfloorclip and mceilingclip should also be set.
//
void R_DrawVisSprite (vissprite_t *vis)
{
const BYTE *pixels;
const FTexture::Span *spans;
fixed_t frac;
FTexture *tex;
int x2, stop4;
fixed_t xiscale;
ESPSResult mode;
bool ispsprite = (!vis->sector && !vis->gx && !vis->gy && !vis->gz);
if (vis->xscale == 0 || vis->yscale == 0)
{ // scaled to 0; can't see
return;
}
dc_colormap = vis->Style.colormap;
mode = R_SetPatchStyle (vis->Style.RenderStyle, vis->Style.alpha, vis->Translation, vis->FillColor);
if (vis->Style.RenderStyle == LegacyRenderStyles[STYLE_Shaded])
{ // For shaded sprites, R_SetPatchStyle sets a dc_colormap to an alpha table, but
// it is the brightest one. We need to get back to the proper light level for
// this sprite.
dc_colormap += vis->ColormapNum << COLORMAPSHIFT;
}
if (mode != DontDraw)
{
if (mode == DoDraw0)
{
// One column at a time
stop4 = vis->x1;
}
else // DoDraw1
{
// Up to four columns at a time
stop4 = vis->x2 & ~3;
}
tex = vis->pic;
spryscale = vis->yscale;
sprflipvert = false;
dc_iscale = 0xffffffffu / (unsigned)vis->yscale;
frac = vis->startfrac;
xiscale = vis->xiscale;
dc_texturemid = vis->texturemid;
if (vis->renderflags & RF_YFLIP)
{
sprflipvert = true;
spryscale = -spryscale;
dc_iscale = -dc_iscale;
dc_texturemid -= (vis->pic->GetHeight() << FRACBITS);
sprtopscreen = centeryfrac + FixedMul(dc_texturemid, spryscale);
}
else
{
sprflipvert = false;
sprtopscreen = centeryfrac - FixedMul(dc_texturemid, spryscale);
}
dc_x = vis->x1;
x2 = vis->x2;
if (dc_x < x2)
{
while ((dc_x < stop4) && (dc_x & 3))
{
pixels = tex->GetColumn (frac >> FRACBITS, &spans);
if (ispsprite || !R_ClipSpriteColumnWithPortals(vis->gx, vis->gy, vis))
R_DrawMaskedColumn (pixels, spans);
dc_x++;
frac += xiscale;
}
while (dc_x < stop4)
{
rt_initcols();
for (int zz = 4; zz; --zz)
{
pixels = tex->GetColumn (frac >> FRACBITS, &spans);
if (ispsprite || !R_ClipSpriteColumnWithPortals(vis->gx, vis->gy, vis))
R_DrawMaskedColumnHoriz (pixels, spans);
dc_x++;
frac += xiscale;
}
rt_draw4cols (dc_x - 4);
}
while (dc_x < x2)
{
pixels = tex->GetColumn (frac >> FRACBITS, &spans);
if (ispsprite || !R_ClipSpriteColumnWithPortals(vis->gx, vis->gy, vis))
R_DrawMaskedColumn (pixels, spans);
dc_x++;
frac += xiscale;
}
}
}
R_FinishSetPatchStyle ();
NetUpdate ();
}
void R_DrawWallSprite(vissprite_t *spr)
{
int x1, x2;
fixed_t yscale;
x1 = MAX<int>(spr->x1, spr->wallc.sx1);
x2 = MIN<int>(spr->x2, spr->wallc.sx2);
if (x1 >= x2)
return;
WallT.InitFromWallCoords(&spr->wallc);
PrepWall(swall, lwall, spr->pic->GetWidth() << FRACBITS, x1, x2);
yscale = spr->yscale;
dc_texturemid = FixedDiv(spr->gzt - viewz, yscale);
if (spr->renderflags & RF_XFLIP)
{
int right = (spr->pic->GetWidth() << FRACBITS) - 1;
for (int i = x1; i < x2; i++)
{
lwall[i] = right - lwall[i];
}
}
// Prepare lighting
bool calclighting = false;
FDynamicColormap *usecolormap = basecolormap;
bool rereadcolormap = true;
// Decals that are added to the scene must fade to black.
if (spr->Style.RenderStyle == LegacyRenderStyles[STYLE_Add] && usecolormap->Fade != 0)
{
usecolormap = GetSpecialLights(usecolormap->Color, 0, usecolormap->Desaturate);
rereadcolormap = false;
}
int shade = LIGHT2SHADE(spr->sector->lightlevel + r_actualextralight);
GlobVis = r_WallVisibility;
rw_lightleft = SafeDivScale12(GlobVis, spr->wallc.sz1);
rw_lightstep = (SafeDivScale12(GlobVis, spr->wallc.sz2) - rw_lightleft) / (spr->wallc.sx2 - spr->wallc.sx1);
rw_light = rw_lightleft + (x1 - spr->wallc.sx1) * rw_lightstep;
if (fixedlightlev >= 0)
dc_colormap = usecolormap->Maps + fixedlightlev;
else if (fixedcolormap != NULL)
dc_colormap = fixedcolormap;
else if (!foggy && (spr->renderflags & RF_FULLBRIGHT))
dc_colormap = usecolormap->Maps;
else
calclighting = true;
// Draw it
WallSpriteTile = spr->pic;
if (spr->renderflags & RF_YFLIP)
{
sprflipvert = true;
yscale = -yscale;
dc_texturemid = dc_texturemid - (spr->pic->GetHeight() << FRACBITS);
}
else
{
sprflipvert = false;
}
// rw_offset is used as the texture's vertical scale
rw_offset = SafeDivScale30(1, yscale);
dc_x = x1;
ESPSResult mode;
mode = R_SetPatchStyle (spr->Style.RenderStyle, spr->Style.alpha, spr->Translation, spr->FillColor);
// R_SetPatchStyle can modify basecolormap.
if (rereadcolormap)
{
usecolormap = basecolormap;
}
if (mode == DontDraw)
{
return;
}
else
{
int stop4;
if (mode == DoDraw0)
{ // 1 column at a time
stop4 = dc_x;
}
else // DoDraw1
{ // up to 4 columns at a time
stop4 = x2 & ~3;
}
while ((dc_x < stop4) && (dc_x & 3))
{
if (calclighting)
{ // calculate lighting
dc_colormap = usecolormap->Maps + (GETPALOOKUP (rw_light, shade) << COLORMAPSHIFT);
}
if (!R_ClipSpriteColumnWithPortals(spr->gx, spr->gy, spr))
R_WallSpriteColumn(R_DrawMaskedColumn);
dc_x++;
}
while (dc_x < stop4)
{
if (calclighting)
{ // calculate lighting
dc_colormap = usecolormap->Maps + (GETPALOOKUP (rw_light, shade) << COLORMAPSHIFT);
}
rt_initcols();
for (int zz = 4; zz; --zz)
{
if (!R_ClipSpriteColumnWithPortals(spr->gx, spr->gy, spr))
R_WallSpriteColumn(R_DrawMaskedColumnHoriz);
dc_x++;
}
rt_draw4cols(dc_x - 4);
}
while (dc_x < x2)
{
if (calclighting)
{ // calculate lighting
dc_colormap = usecolormap->Maps + (GETPALOOKUP (rw_light, shade) << COLORMAPSHIFT);
}
if (!R_ClipSpriteColumnWithPortals(spr->gx, spr->gy, spr))
R_WallSpriteColumn(R_DrawMaskedColumn);
dc_x++;
}
}
R_FinishSetPatchStyle();
}
void R_WallSpriteColumn (void (*drawfunc)(const BYTE *column, const FTexture::Span *spans))
{
unsigned int texturecolumn = lwall[dc_x] >> FRACBITS;
dc_iscale = MulScale16 (swall[dc_x], rw_offset);
spryscale = SafeDivScale32 (1, dc_iscale);
if (sprflipvert)
sprtopscreen = centeryfrac + FixedMul (dc_texturemid, spryscale);
else
sprtopscreen = centeryfrac - FixedMul (dc_texturemid, spryscale);
const BYTE *column;
const FTexture::Span *spans;
column = WallSpriteTile->GetColumn (texturecolumn, &spans);
dc_texturefrac = 0;
drawfunc (column, spans);
rw_light += rw_lightstep;
}
void R_DrawVisVoxel(vissprite_t *spr, int minslabz, int maxslabz, short *cliptop, short *clipbot)
{
ESPSResult mode;
int flags = 0;
// Do setup for blending.
dc_colormap = spr->Style.colormap;
mode = R_SetPatchStyle(spr->Style.RenderStyle, spr->Style.alpha, spr->Translation, spr->FillColor);
if (mode == DontDraw)
{
return;
}
if (colfunc == fuzzcolfunc || colfunc == R_FillColumnP)
{
flags = DVF_OFFSCREEN | DVF_SPANSONLY;
}
else if (colfunc != basecolfunc)
{
flags = DVF_OFFSCREEN;
}
if (flags != 0)
{
R_CheckOffscreenBuffer(RenderTarget->GetWidth(), RenderTarget->GetHeight(), !!(flags & DVF_SPANSONLY));
}
if (spr->bInMirror)
{
flags |= DVF_MIRRORED;
}
// Render the voxel, either directly to the screen or offscreen.
R_DrawVoxel(spr->vx, spr->vy, spr->vz, spr->vang, spr->gx, spr->gy, spr->gz, spr->angle,
spr->xscale, spr->yscale, spr->voxel, spr->Style.colormap, cliptop, clipbot,
minslabz, maxslabz, flags);
// Blend the voxel, if that's what we need to do.
if ((flags & ~DVF_MIRRORED) != 0)
{
for (int x = 0; x < viewwidth; ++x)
{
if (!(flags & DVF_SPANSONLY) && (x & 3) == 0)
{
rt_initcols(OffscreenColorBuffer + x * OffscreenBufferHeight);
}
for (FCoverageBuffer::Span *span = OffscreenCoverageBuffer->Spans[x]; span != NULL; span = span->NextSpan)
{
if (flags & DVF_SPANSONLY)
{
dc_x = x;
dc_yl = span->Start;
dc_yh = span->Stop - 1;
dc_count = span->Stop - span->Start;
dc_dest = ylookup[span->Start] + x + dc_destorg;
colfunc();
}
else
{
unsigned int **tspan = &dc_ctspan[x & 3];
(*tspan)[0] = span->Start;
(*tspan)[1] = span->Stop - 1;
*tspan += 2;
}
}
if (!(flags & DVF_SPANSONLY) && (x & 3) == 3)
{
rt_draw4cols(x - 3);
}
}
}
R_FinishSetPatchStyle();
NetUpdate();
}
//
// R_ProjectSprite
// Generates a vissprite for a thing if it might be visible.
//
void R_ProjectSprite (AActor *thing, int fakeside, F3DFloor *fakefloor, F3DFloor *fakeceiling)
{
fixed_t fx, fy, fz;
fixed_t tr_x;
fixed_t tr_y;
fixed_t gzt; // killough 3/27/98
fixed_t gzb; // [RH] use bottom of sprite, not actor
fixed_t tx, tx2;
fixed_t tz;
fixed_t xscale = FRACUNIT, yscale = FRACUNIT;
int x1;
int x2;
FTextureID picnum;
FTexture *tex;
FVoxelDef *voxel;
vissprite_t* vis;
fixed_t iscale;
sector_t* heightsec; // killough 3/27/98
// Don't waste time projecting sprites that are definitely not visible.
if (thing == NULL ||
(thing->renderflags & RF_INVISIBLE) ||
!thing->RenderStyle.IsVisible(thing->alpha) ||
!thing->IsVisibleToPlayer())
{
return;
}
// [ZZ] Or less definitely not visible (hue)
// [ZZ] 10.01.2016: don't try to clip stuff inside a skybox against the current portal.
if (!CurrentPortalInSkybox && CurrentPortal && !!P_PointOnLineSidePrecise(thing->X(), thing->Y(), CurrentPortal->dst))
return;
// [RH] Interpolate the sprite's position to make it look smooth
fixedvec3 pos = thing->InterpolatedPosition(r_TicFrac);
fx = pos.x;
fy = pos.y;
fz = pos.z + thing->GetBobOffset(r_TicFrac);
tex = NULL;
voxel = NULL;
int spritenum = thing->sprite;
fixed_t spritescaleX = thing->scaleX;
fixed_t spritescaleY = thing->scaleY;
int renderflags = thing->renderflags;
if (spritescaleY < 0)
{
spritescaleY = -spritescaleY;
renderflags ^= RF_YFLIP;
}
if (thing->player != NULL)
{
P_CheckPlayerSprite(thing, spritenum, spritescaleX, spritescaleY);
}
if (thing->picnum.isValid())
{
picnum = thing->picnum;
tex = TexMan(picnum);
if (tex->UseType == FTexture::TEX_Null)
{
return;
}
if (tex->Rotations != 0xFFFF)
{
// choose a different rotation based on player view
spriteframe_t *sprframe = &SpriteFrames[tex->Rotations];
angle_t ang = R_PointToAngle (fx, fy);
angle_t rot;
if (sprframe->Texture[0] == sprframe->Texture[1])
{
rot = (ang - thing->angle + (angle_t)(ANGLE_45/2)*9) >> 28;
}
else
{
rot = (ang - thing->angle + (angle_t)(ANGLE_45/2)*9-(angle_t)(ANGLE_180/16)) >> 28;
}
picnum = sprframe->Texture[rot];
if (sprframe->Flip & (1 << rot))
{
renderflags ^= RF_XFLIP;
}
tex = TexMan[picnum]; // Do not animate the rotation
}
}
else
{
// decide which texture to use for the sprite
#ifdef RANGECHECK
if (spritenum >= (signed)sprites.Size () || spritenum < 0)
{
DPrintf ("R_ProjectSprite: invalid sprite number %u\n", spritenum);
return;
}
#endif
spritedef_t *sprdef = &sprites[spritenum];
if (thing->frame >= sprdef->numframes)
{
// If there are no frames at all for this sprite, don't draw it.
return;
}
else
{
//picnum = SpriteFrames[sprdef->spriteframes + thing->frame].Texture[0];
// choose a different rotation based on player view
spriteframe_t *sprframe = &SpriteFrames[sprdef->spriteframes + thing->frame];
angle_t ang = R_PointToAngle (fx, fy);
angle_t rot;
if (sprframe->Texture[0] == sprframe->Texture[1])
{
rot = (ang - thing->angle + (angle_t)(ANGLE_45/2)*9) >> 28;
}
else
{
rot = (ang - thing->angle + (angle_t)(ANGLE_45/2)*9-(angle_t)(ANGLE_180/16)) >> 28;
}
picnum = sprframe->Texture[rot];
if (sprframe->Flip & (1 << rot))
{
renderflags ^= RF_XFLIP;
}
tex = TexMan[picnum]; // Do not animate the rotation
if (r_drawvoxels)
{
voxel = sprframe->Voxel;
}
}
}
if (spritescaleX < 0)
{
spritescaleX = -spritescaleX;
renderflags ^= RF_XFLIP;
}
if (voxel == NULL && (tex == NULL || tex->UseType == FTexture::TEX_Null))
{
return;
}
if ((renderflags & RF_SPRITETYPEMASK) == RF_WALLSPRITE)
{
R_ProjectWallSprite(thing, fx, fy, fz, picnum, spritescaleX, spritescaleY, renderflags);
return;
}
// transform the origin point
tr_x = fx - viewx;
tr_y = fy - viewy;
tz = DMulScale20 (tr_x, viewtancos, tr_y, viewtansin);
// thing is behind view plane?
if (voxel == NULL && tz < MINZ)
return;
tx = DMulScale16 (tr_x, viewsin, -tr_y, viewcos);
// [RH] Flip for mirrors
if (MirrorFlags & RF_XFLIP)
{
tx = -tx;
}
tx2 = tx >> 4;
// too far off the side?
// if it's a voxel, it can be further off the side
if ((voxel == NULL && (abs(tx) >> 6) > abs(tz)) ||
(voxel != NULL && (abs(tx) >> 7) > abs(tz)))
{
return;
}
if (voxel == NULL)
{
// [RH] Added scaling
int scaled_to = tex->GetScaledTopOffset();
int scaled_bo = scaled_to - tex->GetScaledHeight();
gzt = fz + spritescaleY * scaled_to;
gzb = fz + spritescaleY * scaled_bo;
}
else
{
xscale = FixedMul(spritescaleX, voxel->Scale);
yscale = FixedMul(spritescaleY, voxel->Scale);
gzt = fz + MulScale8(yscale, voxel->Voxel->Mips[0].PivotZ) - thing->floorclip;
gzb = fz + MulScale8(yscale, voxel->Voxel->Mips[0].PivotZ - (voxel->Voxel->Mips[0].SizeZ << 8));
if (gzt <= gzb)
return;
}
// killough 3/27/98: exclude things totally separated
// from the viewer, by either water or fake ceilings
// killough 4/11/98: improve sprite clipping for underwater/fake ceilings
heightsec = thing->Sector->GetHeightSec();
if (heightsec != NULL) // only clip things which are in special sectors
{
if (fakeside == FAKED_AboveCeiling)
{
if (gzt < heightsec->ceilingplane.ZatPoint (fx, fy))
return;
}
else if (fakeside == FAKED_BelowFloor)
{
if (gzb >= heightsec->floorplane.ZatPoint (fx, fy))
return;
}
else
{
if (gzt < heightsec->floorplane.ZatPoint (fx, fy))
return;
if (!(heightsec->MoreFlags & SECF_FAKEFLOORONLY) && gzb >= heightsec->ceilingplane.ZatPoint (fx, fy))
return;
}
}
if (voxel == NULL)
{
xscale = DivScale12 (centerxfrac, tz);
// [RH] Reject sprites that are off the top or bottom of the screen
if (MulScale12 (globaluclip, tz) > viewz - gzb ||
MulScale12 (globaldclip, tz) < viewz - gzt)
{
return;
}
// [RH] Flip for mirrors
renderflags ^= MirrorFlags & RF_XFLIP;
// calculate edges of the shape
const fixed_t thingxscalemul = DivScale16(spritescaleX, tex->xScale);
tx -= ((renderflags & RF_XFLIP) ? (tex->GetWidth() - tex->LeftOffset - 1) : tex->LeftOffset) * thingxscalemul;
x1 = centerx + MulScale32 (tx, xscale);
// off the right side?
if (x1 >= WindowRight)
return;
tx += tex->GetWidth() * thingxscalemul;
x2 = centerx + MulScale32 (tx, xscale);
// off the left side or too small?
if ((x2 < WindowLeft || x2 <= x1))
return;
xscale = FixedDiv(FixedMul(spritescaleX, xscale), tex->xScale);
iscale = (tex->GetWidth() << FRACBITS) / (x2 - x1);
fixed_t yscale = SafeDivScale16(spritescaleY, tex->yScale);
// store information in a vissprite
vis = R_NewVisSprite();
vis->CurrentPortalUniq = CurrentPortalUniq;
vis->xscale = xscale;
vis->yscale = Scale(InvZtoScale, yscale, tz << 4);
vis->idepth = (unsigned)DivScale32(1, tz) >> 1; // tz is 20.12, so idepth ought to be 12.20, but signed math makes it 13.19
vis->floorclip = FixedDiv (thing->floorclip, yscale);
vis->texturemid = (tex->TopOffset << FRACBITS) - FixedDiv (viewz - fz + thing->floorclip, yscale);
vis->x1 = x1 < WindowLeft ? WindowLeft : x1;
vis->x2 = x2 > WindowRight ? WindowRight : x2;
vis->angle = thing->angle;
if (renderflags & RF_XFLIP)
{
vis->startfrac = (tex->GetWidth() << FRACBITS) - 1;
vis->xiscale = -iscale;
}
else
{
vis->startfrac = 0;
vis->xiscale = iscale;
}
if (vis->x1 > x1)
vis->startfrac += vis->xiscale * (vis->x1 - x1);
}
else
{
vis = R_NewVisSprite();
vis->CurrentPortalUniq = CurrentPortalUniq;
vis->xscale = xscale;
vis->yscale = yscale;
vis->x1 = WindowLeft;
vis->x2 = WindowRight;
vis->idepth = (unsigned)DivScale32(1, MAX(tz, MINZ)) >> 1;
vis->floorclip = thing->floorclip;
fz -= thing->floorclip;
vis->angle = thing->angle + voxel->AngleOffset;
int voxelspin = (thing->flags & MF_DROPPED) ? voxel->DroppedSpin : voxel->PlacedSpin;
if (voxelspin != 0)
{
double ang = double(I_FPSTime()) * voxelspin / 1000;
vis->angle -= angle_t(ang * (4294967296.f / 360));
}
vis->vx = viewx;
vis->vy = viewy;
vis->vz = viewz;
vis->vang = viewangle;
}
// killough 3/27/98: save sector for special clipping later
vis->heightsec = heightsec;
vis->sector = thing->Sector;
vis->depth = tz;
vis->gx = fx;
vis->gy = fy;
vis->gz = fz;
vis->gzb = gzb; // [RH] use gzb, not thing->z
vis->gzt = gzt; // killough 3/27/98
vis->deltax = fx - viewx;
vis->deltay = fy - viewy;
vis->renderflags = renderflags;
if(thing->flags5 & MF5_BRIGHT) vis->renderflags |= RF_FULLBRIGHT; // kg3D
vis->Style.RenderStyle = thing->RenderStyle;
vis->FillColor = thing->fillcolor;
vis->Translation = thing->Translation; // [RH] thing translation table
vis->FakeFlatStat = fakeside;
vis->Style.alpha = thing->alpha;
vis->fakefloor = fakefloor;
vis->fakeceiling = fakeceiling;
vis->ColormapNum = 0;
vis->bInMirror = MirrorFlags & RF_XFLIP;
vis->bSplitSprite = false;
if (voxel != NULL)
{
vis->voxel = voxel->Voxel;
vis->bIsVoxel = true;
vis->bWallSprite = false;
DrewAVoxel = true;
}
else
{
vis->pic = tex;
vis->bIsVoxel = false;
vis->bWallSprite = false;
}
// The software renderer cannot invert the source without inverting the overlay
// too. That means if the source is inverted, we need to do the reverse of what
// the invert overlay flag says to do.
INTBOOL invertcolormap = (vis->Style.RenderStyle.Flags & STYLEF_InvertOverlay);
if (vis->Style.RenderStyle.Flags & STYLEF_InvertSource)
{
invertcolormap = !invertcolormap;
}
FDynamicColormap *mybasecolormap = basecolormap;
// Sprites that are added to the scene must fade to black.
if (vis->Style.RenderStyle == LegacyRenderStyles[STYLE_Add] && mybasecolormap->Fade != 0)
{
mybasecolormap = GetSpecialLights(mybasecolormap->Color, 0, mybasecolormap->Desaturate);
}
if (vis->Style.RenderStyle.Flags & STYLEF_FadeToBlack)
{
if (invertcolormap)
{ // Fade to white
mybasecolormap = GetSpecialLights(mybasecolormap->Color, MAKERGB(255,255,255), mybasecolormap->Desaturate);
invertcolormap = false;
}
else
{ // Fade to black
mybasecolormap = GetSpecialLights(mybasecolormap->Color, MAKERGB(0,0,0), mybasecolormap->Desaturate);
}
}
// get light level
if (fixedcolormap != NULL)
{ // fixed map
vis->Style.colormap = fixedcolormap;
}
else
{
if (invertcolormap)
{
mybasecolormap = GetSpecialLights(mybasecolormap->Color, mybasecolormap->Fade.InverseColor(), mybasecolormap->Desaturate);
}
if (fixedlightlev >= 0)
{
vis->Style.colormap = mybasecolormap->Maps + fixedlightlev;
}
else if (!foggy && ((renderflags & RF_FULLBRIGHT) || (thing->flags5 & MF5_BRIGHT)))
{ // full bright
vis->Style.colormap = mybasecolormap->Maps;
}
else
{ // diminished light
vis->ColormapNum = GETPALOOKUP(
(fixed_t)DivScale12 (r_SpriteVisibility, MAX(tz, MINZ)), spriteshade);
vis->Style.colormap = mybasecolormap->Maps + (vis->ColormapNum << COLORMAPSHIFT);
}
}
}
static void R_ProjectWallSprite(AActor *thing, fixed_t fx, fixed_t fy, fixed_t fz, FTextureID picnum, fixed_t xscale, fixed_t yscale, int renderflags)
{
FWallCoords wallc;
int x1, x2;
fixed_t lx1, lx2, ly1, ly2;
fixed_t gzb, gzt, tz;
FTexture *pic = TexMan(picnum, true);
angle_t ang = (thing->angle + ANGLE_90) >> ANGLETOFINESHIFT;
vissprite_t *vis;
// Determine left and right edges of sprite. The sprite's angle is its normal,
// so the edges are 90 degrees each side of it.
x2 = pic->GetScaledWidth();
x1 = pic->GetScaledLeftOffset();
x1 *= xscale;
x2 *= xscale;
lx1 = fx - FixedMul(x1, finecosine[ang]) - viewx;
ly1 = fy - FixedMul(x1, finesine[ang]) - viewy;
lx2 = lx1 + FixedMul(x2, finecosine[ang]);
ly2 = ly1 + FixedMul(x2, finesine[ang]);
// Is it off-screen?
if (wallc.Init(lx1, ly1, lx2, ly2, TOO_CLOSE_Z))
return;
if (wallc.sx1 >= WindowRight || wallc.sx2 <= WindowLeft)
return;
// Sprite sorting should probably treat these as walls, not sprites,
// but right now, I just want to get them drawing.
tz = DMulScale20(fx - viewx, viewtancos, fy - viewy, viewtansin);
int scaled_to = pic->GetScaledTopOffset();
int scaled_bo = scaled_to - pic->GetScaledHeight();
gzt = fz + yscale * scaled_to;
gzb = fz + yscale * scaled_bo;
vis = R_NewVisSprite();
vis->CurrentPortalUniq = CurrentPortalUniq;
vis->x1 = wallc.sx1 < WindowLeft ? WindowLeft : wallc.sx1;
vis->x2 = wallc.sx2 >= WindowRight ? WindowRight : wallc.sx2;
vis->yscale = yscale;
vis->idepth = (unsigned)DivScale32(1, tz) >> 1;
vis->depth = tz;
vis->sector = thing->Sector;
vis->heightsec = NULL;
vis->gx = fx;
vis->gy = fy;
vis->gz = fz;
vis->gzb = gzb;
vis->gzt = gzt;
vis->deltax = fx - viewx;
vis->deltay = fy - viewy;
vis->renderflags = renderflags;
if(thing->flags5 & MF5_BRIGHT) vis->renderflags |= RF_FULLBRIGHT; // kg3D
vis->Style.RenderStyle = thing->RenderStyle;
vis->FillColor = thing->fillcolor;
vis->Translation = thing->Translation;
vis->FakeFlatStat = 0;
vis->Style.alpha = thing->alpha;
vis->fakefloor = NULL;
vis->fakeceiling = NULL;
vis->ColormapNum = 0;
vis->bInMirror = MirrorFlags & RF_XFLIP;
vis->pic = pic;
vis->bIsVoxel = false;
vis->bWallSprite = true;
vis->ColormapNum = GETPALOOKUP(
(fixed_t)DivScale12 (r_SpriteVisibility, MAX(tz, MINZ)), spriteshade);
vis->Style.colormap = basecolormap->Maps + (vis->ColormapNum << COLORMAPSHIFT);
vis->wallc = wallc;
}
//
// R_AddSprites
// During BSP traversal, this adds sprites by sector.
//
// killough 9/18/98: add lightlevel as parameter, fixing underwater lighting
// [RH] Save which side of heightsec sprite is on here.
void R_AddSprites (sector_t *sec, int lightlevel, int fakeside)
{
AActor *thing;
F3DFloor *rover;
F3DFloor *fakeceiling = NULL;
F3DFloor *fakefloor = NULL;
// BSP is traversed by subsector.
// A sector might have been split into several
// subsectors during BSP building.
// Thus we check whether it was already added.
if (sec->thinglist == NULL || sec->validcount == validcount)
return;
// Well, now it will be done.
sec->validcount = validcount;
spriteshade = LIGHT2SHADE(lightlevel + r_actualextralight);
// Handle all things in sector.
for (thing = sec->thinglist; thing; thing = thing->snext)
{
// find fake level
for(int i = 0; i < (int)frontsector->e->XFloor.ffloors.Size(); i++) {
rover = frontsector->e->XFloor.ffloors[i];
if(!(rover->flags & FF_EXISTS) || !(rover->flags & FF_RENDERPLANES)) continue;
if(!(rover->flags & FF_SOLID) || rover->alpha != 255) continue;
if(!fakefloor)
{
if(!(rover->top.plane->a) && !(rover->top.plane->b))
{
if(rover->top.plane->Zat0() <= thing->Z()) fakefloor = rover;
}
}
if(!(rover->bottom.plane->a) && !(rover->bottom.plane->b))
{
if(rover->bottom.plane->Zat0() >= thing->Top()) fakeceiling = rover;
}
}
R_ProjectSprite (thing, fakeside, fakefloor, fakeceiling);
fakeceiling = NULL;
fakefloor = NULL;
}
}
//
// R_DrawPSprite
//
void R_DrawPSprite (pspdef_t* psp, int pspnum, AActor *owner, fixed_t sx, fixed_t sy)
{
fixed_t tx;
int x1;
int x2;
spritedef_t* sprdef;
spriteframe_t* sprframe;
FTextureID picnum;
WORD flip;
FTexture* tex;
vissprite_t* vis;
static vissprite_t avis[NUMPSPRITES];
bool noaccel;
assert(pspnum >= 0 && pspnum < NUMPSPRITES);
// decide which patch to use
if ( (unsigned)psp->sprite >= (unsigned)sprites.Size ())
{
DPrintf ("R_DrawPSprite: invalid sprite number %i\n", psp->sprite);
return;
}
sprdef = &sprites[psp->sprite];
if (psp->frame >= sprdef->numframes)
{
DPrintf ("R_DrawPSprite: invalid sprite frame %i : %i\n", psp->sprite, psp->frame);
return;
}
sprframe = &SpriteFrames[sprdef->spriteframes + psp->frame];
picnum = sprframe->Texture[0];
flip = sprframe->Flip & 1;
tex = TexMan(picnum);
if (tex->UseType == FTexture::TEX_Null)
return;
// calculate edges of the shape
tx = sx-((320/2)<<FRACBITS);
tx -= tex->GetScaledLeftOffset() << FRACBITS;
x1 = (centerxfrac + FixedMul (tx, pspritexscale)) >>FRACBITS;
VisPSpritesX1[pspnum] = x1;
// off the right side
if (x1 > viewwidth)
return;
tx += tex->GetScaledWidth() << FRACBITS;
x2 = ((centerxfrac + FixedMul (tx, pspritexscale)) >>FRACBITS);
// off the left side
if (x2 <= 0)
return;
// store information in a vissprite
vis = &avis[pspnum];
vis->renderflags = owner->renderflags;
vis->floorclip = 0;
vis->texturemid = MulScale16((BASEYCENTER<<FRACBITS) - sy, tex->yScale) + (tex->TopOffset << FRACBITS);
if (camera->player && (RenderTarget != screen ||
viewheight == RenderTarget->GetHeight() ||
(RenderTarget->GetWidth() > 320 && !st_scale)))
{ // Adjust PSprite for fullscreen views
AWeapon *weapon = NULL;
if (camera->player != NULL)
{
weapon = camera->player->ReadyWeapon;
}
if (pspnum <= ps_flash && weapon != NULL && weapon->YAdjust != 0)
{
if (RenderTarget != screen || viewheight == RenderTarget->GetHeight())
{
vis->texturemid -= weapon->YAdjust;
}
else
{
vis->texturemid -= FixedMul (StatusBar->GetDisplacement (),
weapon->YAdjust);
}
}
}
if (pspnum <= ps_flash)
{ // Move the weapon down for 1280x1024.
vis->texturemid -= BaseRatioSizes[WidescreenRatio][2];
}
vis->x1 = x1 < 0 ? 0 : x1;
vis->x2 = x2 >= viewwidth ? viewwidth : x2;
vis->xscale = DivScale16(pspritexscale, tex->xScale);
vis->yscale = DivScale16(pspriteyscale, tex->yScale);
vis->Translation = 0; // [RH] Use default colors
vis->pic = tex;
vis->ColormapNum = 0;
if (flip)
{
vis->xiscale = -MulScale16(pspritexiscale, tex->xScale);
vis->startfrac = (tex->GetWidth() << FRACBITS) - 1;
}
else
{
vis->xiscale = MulScale16(pspritexiscale, tex->xScale);
vis->startfrac = 0;
}
if (vis->x1 > x1)
vis->startfrac += vis->xiscale*(vis->x1-x1);
noaccel = false;
if (pspnum <= ps_flash)
{
vis->Style.alpha = owner->alpha;
vis->Style.RenderStyle = owner->RenderStyle;
// The software renderer cannot invert the source without inverting the overlay
// too. That means if the source is inverted, we need to do the reverse of what
// the invert overlay flag says to do.
INTBOOL invertcolormap = (vis->Style.RenderStyle.Flags & STYLEF_InvertOverlay);
if (vis->Style.RenderStyle.Flags & STYLEF_InvertSource)
{
invertcolormap = !invertcolormap;
}
FDynamicColormap *mybasecolormap = basecolormap;
if (vis->Style.RenderStyle.Flags & STYLEF_FadeToBlack)
{
if (invertcolormap)
{ // Fade to white
mybasecolormap = GetSpecialLights(mybasecolormap->Color, MAKERGB(255,255,255), mybasecolormap->Desaturate);
invertcolormap = false;
}
else
{ // Fade to black
mybasecolormap = GetSpecialLights(mybasecolormap->Color, MAKERGB(0,0,0), mybasecolormap->Desaturate);
}
}
if (realfixedcolormap != NULL)
{ // fixed color
vis->Style.colormap = realfixedcolormap->Colormap;
}
else
{
if (invertcolormap)
{
mybasecolormap = GetSpecialLights(mybasecolormap->Color, mybasecolormap->Fade.InverseColor(), mybasecolormap->Desaturate);
}
if (fixedlightlev >= 0)
{
vis->Style.colormap = mybasecolormap->Maps + fixedlightlev;
}
else if (!foggy && psp->state->GetFullbright())
{ // full bright
vis->Style.colormap = mybasecolormap->Maps; // [RH] use basecolormap
}
else
{ // local light
vis->Style.colormap = mybasecolormap->Maps + (GETPALOOKUP (0, spriteshade) << COLORMAPSHIFT);
}
}
if (camera->Inventory != NULL)
{
lighttable_t *oldcolormap = vis->Style.colormap;
camera->Inventory->AlterWeaponSprite (&vis->Style);
if (vis->Style.colormap != oldcolormap)
{
// The colormap has changed. Is it one we can easily identify?
// If not, then don't bother trying to identify it for
// hardware accelerated drawing.
if (vis->Style.colormap < SpecialColormaps[0].Colormap ||
vis->Style.colormap > SpecialColormaps.Last().Colormap)
{
noaccel = true;
}
// Has the basecolormap changed? If so, we can't hardware accelerate it,
// since we don't know what it is anymore.
else if (vis->Style.colormap < mybasecolormap->Maps ||
vis->Style.colormap >= mybasecolormap->Maps + NUMCOLORMAPS*256)
{
noaccel = true;
}
}
}
// If we're drawing with a special colormap, but shaders for them are disabled, do
// not accelerate.
if (!r_shadercolormaps && (vis->Style.colormap >= SpecialColormaps[0].Colormap &&
vis->Style.colormap <= SpecialColormaps.Last().Colormap))
{
noaccel = true;
}
// If drawing with a BOOM colormap, disable acceleration.
if (mybasecolormap == &NormalLight && NormalLight.Maps != realcolormaps)
{
noaccel = true;
}
// If the main colormap has fixed lights, and this sprite is being drawn with that
// colormap, disable acceleration so that the lights can remain fixed.
if (!noaccel && realfixedcolormap == NULL &&
NormalLightHasFixedLights && mybasecolormap == &NormalLight &&
vis->pic->UseBasePalette())
{
noaccel = true;
}
VisPSpritesBaseColormap[pspnum] = mybasecolormap;
}
else
{
VisPSpritesBaseColormap[pspnum] = basecolormap;
vis->Style.colormap = basecolormap->Maps;
vis->Style.RenderStyle = STYLE_Normal;
}
// Check for hardware-assisted 2D. If it's available, and this sprite is not
// fuzzy, don't draw it until after the switch to 2D mode.
if (!noaccel && RenderTarget == screen && (DFrameBuffer *)screen->Accel2D)
{
FRenderStyle style = vis->Style.RenderStyle;
style.CheckFuzz();
if (style.BlendOp != STYLEOP_Fuzz)
{
VisPSprites[pspnum] = vis;
return;
}
}
R_DrawVisSprite (vis);
}
//==========================================================================
//
// R_DrawPlayerSprites
//
//==========================================================================
void R_DrawPlayerSprites ()
{
int i;
int lightnum;
pspdef_t* psp;
sector_t* sec = NULL;
static sector_t tempsec;
int floorlight, ceilinglight;
F3DFloor *rover;
if (!r_drawplayersprites ||
!camera->player ||
(players[consoleplayer].cheats & CF_CHASECAM) ||
(r_deathcamera && camera->health <= 0))
return;
if(fixedlightlev < 0 && viewsector->e && viewsector->e->XFloor.lightlist.Size()) {
for(i = viewsector->e->XFloor.lightlist.Size() - 1; i >= 0; i--)
if(viewz <= viewsector->e->XFloor.lightlist[i].plane.Zat0()) {
rover = viewsector->e->XFloor.lightlist[i].caster;
if(rover) {
if(rover->flags & FF_DOUBLESHADOW && viewz <= rover->bottom.plane->Zat0())
break;
sec = rover->model;
if(rover->flags & FF_FADEWALLS)
basecolormap = sec->ColorMap;
else
basecolormap = viewsector->e->XFloor.lightlist[i].extra_colormap;
}
break;
}
if(!sec) {
sec = viewsector;
basecolormap = sec->ColorMap;
}
floorlight = ceilinglight = sec->lightlevel;
} else {
// This used to use camera->Sector but due to interpolation that can be incorrect
// when the interpolated viewpoint is in a different sector than the camera.
sec = R_FakeFlat (viewsector, &tempsec, &floorlight,
&ceilinglight, false);
// [RH] set basecolormap
basecolormap = sec->ColorMap;
}
// [RH] set foggy flag
foggy = (level.fadeto || basecolormap->Fade || (level.flags & LEVEL_HASFADETABLE));
r_actualextralight = foggy ? 0 : extralight << 4;
// get light level
lightnum = ((floorlight + ceilinglight) >> 1) + r_actualextralight;
spriteshade = LIGHT2SHADE(lightnum) - 24*FRACUNIT;
// clip to screen bounds
mfloorclip = screenheightarray;
mceilingclip = zeroarray;
if (camera->player != NULL)
{
fixed_t centerhack = centeryfrac;
fixed_t ofsx, ofsy;
centery = viewheight >> 1;
centeryfrac = centery << FRACBITS;
P_BobWeapon (camera->player, &camera->player->psprites[ps_weapon], &ofsx, &ofsy);
// add all active psprites
for (i = 0, psp = camera->player->psprites;
i < NUMPSPRITES;
i++, psp++)
{
// [RH] Don't draw the targeter's crosshair if the player already has a crosshair set.
if (psp->state && (i != ps_targetcenter || CrosshairImage == NULL))
{
R_DrawPSprite (psp, i, camera, psp->sx + ofsx, psp->sy + ofsy);
}
// [RH] Don't bob the targeter.
if (i == ps_flash)
{
ofsx = ofsy = 0;
}
}
centeryfrac = centerhack;
centery = centerhack >> FRACBITS;
}
}
//==========================================================================
//
// R_DrawRemainingPlayerSprites
//
// Called from D_Display to draw sprites that were not drawn by
// R_DrawPlayerSprites().
//
//==========================================================================
void R_DrawRemainingPlayerSprites()
{
for (int i = 0; i < NUMPSPRITES; ++i)
{
vissprite_t *vis;
vis = VisPSprites[i];
VisPSprites[i] = NULL;
if (vis != NULL)
{
FDynamicColormap *colormap = VisPSpritesBaseColormap[i];
bool flip = vis->xiscale < 0;
FSpecialColormap *special = NULL;
PalEntry overlay = 0;
FColormapStyle colormapstyle;
bool usecolormapstyle = false;
if (vis->Style.colormap >= SpecialColormaps[0].Colormap &&
vis->Style.colormap < SpecialColormaps[SpecialColormaps.Size()].Colormap)
{
// Yuck! There needs to be a better way to store colormaps in the vissprite... :(
ptrdiff_t specialmap = (vis->Style.colormap - SpecialColormaps[0].Colormap) / sizeof(FSpecialColormap);
special = &SpecialColormaps[specialmap];
}
else if (colormap->Color == PalEntry(255,255,255) &&
colormap->Desaturate == 0)
{
overlay = colormap->Fade;
overlay.a = BYTE(((vis->Style.colormap - colormap->Maps) >> 8) * 255 / NUMCOLORMAPS);
}
else
{
usecolormapstyle = true;
colormapstyle.Color = colormap->Color;
colormapstyle.Fade = colormap->Fade;
colormapstyle.Desaturate = colormap->Desaturate;
colormapstyle.FadeLevel = ((vis->Style.colormap - colormap->Maps) >> 8) / float(NUMCOLORMAPS);
}
screen->DrawTexture(vis->pic,
viewwindowx + VisPSpritesX1[i],
viewwindowy + viewheight/2 - (vis->texturemid / 65536.0) * (vis->yscale / 65536.0) - 0.5,
DTA_DestWidthF, FIXED2FLOAT(vis->pic->GetWidth() * vis->xscale),
DTA_DestHeightF, FIXED2FLOAT(vis->pic->GetHeight() * vis->yscale),
DTA_Translation, TranslationToTable(vis->Translation),
DTA_FlipX, flip,
DTA_TopOffset, 0,
DTA_LeftOffset, 0,
DTA_ClipLeft, viewwindowx,
DTA_ClipTop, viewwindowy,
DTA_ClipRight, viewwindowx + viewwidth,
DTA_ClipBottom, viewwindowy + viewheight,
DTA_Alpha, vis->Style.alpha,
DTA_RenderStyle, vis->Style.RenderStyle,
DTA_FillColor, vis->FillColor,
DTA_SpecialColormap, special,
DTA_ColorOverlay, overlay.d,
DTA_ColormapStyle, usecolormapstyle ? &colormapstyle : NULL,
TAG_DONE);
}
}
}
//
// R_SortVisSprites
//
// [RH] The old code for this function used a bubble sort, which was far less
// than optimal with large numbers of sprites. I changed it to use the
// stdlib qsort() function instead, and now it is a *lot* faster; the
// more vissprites that need to be sorted, the better the performance
// gain compared to the old function.
//
// Sort vissprites by depth, far to near
// This is the standard version, which does a simple test based on depth.
static bool sv_compare(vissprite_t *a, vissprite_t *b)
{
return a->idepth > b->idepth;
}
// This is an alternate version, for when one or more voxel is in view.
// It does a 2D distance test based on whichever one is furthest from
// the viewpoint.
static bool sv_compare2d(vissprite_t *a, vissprite_t *b)
{
return TVector2<double>(a->deltax, a->deltay).LengthSquared() <
TVector2<double>(b->deltax, b->deltay).LengthSquared();
}
#if 0
static drawseg_t **drawsegsorter;
static int drawsegsortersize = 0;
// Sort vissprites by leftmost column, left to right
static int STACK_ARGS sv_comparex (const void *arg1, const void *arg2)
{
return (*(vissprite_t **)arg2)->x1 - (*(vissprite_t **)arg1)->x1;
}
// Sort drawsegs by rightmost column, left to right
static int STACK_ARGS sd_comparex (const void *arg1, const void *arg2)
{
return (*(drawseg_t **)arg2)->x2 - (*(drawseg_t **)arg1)->x2;
}
CVAR (Bool, r_splitsprites, true, CVAR_ARCHIVE)
// Split up vissprites that intersect drawsegs
void R_SplitVisSprites ()
{
size_t start, stop;
size_t numdrawsegs = ds_p - firstdrawseg;
size_t numsprites;
size_t spr, dseg, dseg2;
if (!r_splitsprites)
return;
if (numdrawsegs == 0 || vissprite_p - firstvissprite == 0)
return;
// Sort drawsegs from left to right
if (numdrawsegs > drawsegsortersize)
{
if (drawsegsorter != NULL)
delete[] drawsegsorter;
drawsegsortersize = numdrawsegs * 2;
drawsegsorter = new drawseg_t *[drawsegsortersize];
}
for (dseg = dseg2 = 0; dseg < numdrawsegs; ++dseg)
{
// Drawsegs that don't clip any sprites don't need to be considered.
if (firstdrawseg[dseg].silhouette)
{
drawsegsorter[dseg2++] = &firstdrawseg[dseg];
}
}
numdrawsegs = dseg2;
if (numdrawsegs == 0)
{
return;
}
qsort (drawsegsorter, numdrawsegs, sizeof(drawseg_t *), sd_comparex);
// Now sort vissprites from left to right, and walk them simultaneously
// with the drawsegs, splitting any that intersect.
start = firstvissprite - vissprites;
int p = 0;
do
{
p++;
R_SortVisSprites (sv_comparex, start);
stop = vissprite_p - vissprites;
numsprites = stop - start;
spr = dseg = 0;
do
{
vissprite_t *vis = spritesorter[spr], *vis2;
// Skip drawsegs until we get to one that doesn't end before the sprite
// begins.
while (dseg < numdrawsegs && drawsegsorter[dseg]->x2 <= vis->x1)
{
dseg++;
}
// Now split the sprite against any drawsegs it intersects
for (dseg2 = dseg; dseg2 < numdrawsegs; dseg2++)
{
drawseg_t *ds = drawsegsorter[dseg2];
if (ds->x1 > vis->x2 || ds->x2 < vis->x1)
continue;
if ((vis->idepth < ds->siz1) != (vis->idepth < ds->siz2))
{ // The drawseg is crossed; find the x where the intersection occurs
int cross = Scale (vis->idepth - ds->siz1, ds->sx2 - ds->sx1, ds->siz2 - ds->siz1) + ds->sx1 + 1;
/* if (cross < ds->x1 || cross > ds->x2)
{ // The original seg is crossed, but the drawseg is not
continue;
}
*/ if (cross <= vis->x1 || cross >= vis->x2)
{ // Don't create 0-sized sprites
continue;
}
vis->bSplitSprite = true;
// Create a new vissprite for the right part of the sprite
vis2 = R_NewVisSprite ();
*vis2 = *vis;
vis2->startfrac += vis2->xiscale * (cross - vis2->x1);
vis->x2 = cross-1;
vis2->x1 = cross;
//vis2->alpha /= 2;
//vis2->RenderStyle = STYLE_Add;
if (vis->idepth < ds->siz1)
{ // Left is in back, right is in front
vis->sector = ds->curline->backsector;
vis2->sector = ds->curline->frontsector;
}
else
{ // Right is in front, left is in back
vis->sector = ds->curline->frontsector;
vis2->sector = ds->curline->backsector;
}
}
}
}
while (dseg < numdrawsegs && ++spr < numsprites);
// Repeat for any new sprites that were added.
}
while (start = stop, stop != vissprite_p - vissprites);
}
#endif
#ifdef __GNUC__
static void swap(vissprite_t *&a, vissprite_t *&b)
{
vissprite_t *t = a;
a = b;
b = t;
}
#endif
void R_SortVisSprites (bool (*compare)(vissprite_t *, vissprite_t *), size_t first)
{
int i;
vissprite_t **spr;
vsprcount = int(vissprite_p - &vissprites[first]);
if (vsprcount == 0)
return;
if (spritesortersize < MaxVisSprites)
{
if (spritesorter != NULL)
delete[] spritesorter;
spritesorter = new vissprite_t *[MaxVisSprites];
spritesortersize = MaxVisSprites;
}
if (!(i_compatflags & COMPATF_SPRITESORT))
{
for (i = 0, spr = firstvissprite; i < vsprcount; i++, spr++)
{
spritesorter[i] = *spr;
}
}
else
{
// If the compatibility option is on sprites of equal distance need to
// be sorted in inverse order. This is most easily achieved by
// filling the sort array backwards before the sort.
for (i = 0, spr = firstvissprite + vsprcount-1; i < vsprcount; i++, spr--)
{
spritesorter[i] = *spr;
}
}
std::stable_sort(&spritesorter[0], &spritesorter[vsprcount], compare);
}
//
// R_DrawSprite
//
void R_DrawSprite (vissprite_t *spr)
{
static short clipbot[MAXWIDTH];
static short cliptop[MAXWIDTH];
drawseg_t *ds;
int i;
int x1, x2;
int r1, r2;
short topclip, botclip;
short *clip1, *clip2;
lighttable_t *colormap = spr->Style.colormap;
F3DFloor *rover;
FDynamicColormap *mybasecolormap;
// [RH] Check for particles
if (!spr->bIsVoxel && spr->pic == NULL)
{
// kg3D - reject invisible parts
if ((fake3D & FAKE3D_CLIPBOTTOM) && spr->gz <= sclipBottom) return;
if ((fake3D & FAKE3D_CLIPTOP) && spr->gz >= sclipTop) return;
R_DrawParticle (spr);
return;
}
x1 = spr->x1;
x2 = spr->x2;
// [RH] Quickly reject sprites with bad x ranges.
if (x1 >= x2)
return;
// [RH] Sprites split behind a one-sided line can also be discarded.
if (spr->sector == NULL)
return;
// kg3D - reject invisible parts
if ((fake3D & FAKE3D_CLIPBOTTOM) && spr->gzt <= sclipBottom) return;
if ((fake3D & FAKE3D_CLIPTOP) && spr->gzb >= sclipTop) return;
// kg3D - correct colors now
if (!fixedcolormap && fixedlightlev < 0 && spr->sector->e && spr->sector->e->XFloor.lightlist.Size())
{
if (!(fake3D & FAKE3D_CLIPTOP))
{
sclipTop = spr->sector->ceilingplane.ZatPoint(viewx, viewy);
}
sector_t *sec = NULL;
for (i = spr->sector->e->XFloor.lightlist.Size() - 1; i >= 0; i--)
{
if (sclipTop <= spr->sector->e->XFloor.lightlist[i].plane.Zat0())
{
rover = spr->sector->e->XFloor.lightlist[i].caster;
if (rover)
{
if (rover->flags & FF_DOUBLESHADOW && sclipTop <= rover->bottom.plane->Zat0())
{
break;
}
sec = rover->model;
if (rover->flags & FF_FADEWALLS)
{
mybasecolormap = sec->ColorMap;
}
else
{
mybasecolormap = spr->sector->e->XFloor.lightlist[i].extra_colormap;
}
}
break;
}
}
// found new values, recalculate
if (sec)
{
INTBOOL invertcolormap = (spr->Style.RenderStyle.Flags & STYLEF_InvertOverlay);
if (spr->Style.RenderStyle.Flags & STYLEF_InvertSource)
{
invertcolormap = !invertcolormap;
}
// Sprites that are added to the scene must fade to black.
if (spr->Style.RenderStyle == LegacyRenderStyles[STYLE_Add] && mybasecolormap->Fade != 0)
{
mybasecolormap = GetSpecialLights(mybasecolormap->Color, 0, mybasecolormap->Desaturate);
}
if (spr->Style.RenderStyle.Flags & STYLEF_FadeToBlack)
{
if (invertcolormap)
{ // Fade to white
mybasecolormap = GetSpecialLights(mybasecolormap->Color, MAKERGB(255,255,255), mybasecolormap->Desaturate);
invertcolormap = false;
}
else
{ // Fade to black
mybasecolormap = GetSpecialLights(mybasecolormap->Color, MAKERGB(0,0,0), mybasecolormap->Desaturate);
}
}
// get light level
if (invertcolormap)
{
mybasecolormap = GetSpecialLights(mybasecolormap->Color, mybasecolormap->Fade.InverseColor(), mybasecolormap->Desaturate);
}
if (fixedlightlev >= 0)
{
spr->Style.colormap = mybasecolormap->Maps + fixedlightlev;
}
else if (!foggy && (spr->renderflags & RF_FULLBRIGHT))
{ // full bright
spr->Style.colormap = mybasecolormap->Maps;
}
else
{ // diminished light
spriteshade = LIGHT2SHADE(sec->lightlevel + r_actualextralight);
spr->Style.colormap = mybasecolormap->Maps + (GETPALOOKUP (
(fixed_t)DivScale12 (r_SpriteVisibility, MAX(MINZ, spr->depth)), spriteshade) << COLORMAPSHIFT);
}
}
}
// [RH] Initialize the clipping arrays to their largest possible range
// instead of using a special "not clipped" value. This eliminates
// visual anomalies when looking down and should be faster, too.
topclip = 0;
botclip = viewheight;
// killough 3/27/98:
// Clip the sprite against deep water and/or fake ceilings.
// [RH] rewrote this to be based on which part of the sector is really visible
fixed_t scale = MulScale19 (InvZtoScale, spr->idepth);
fixed_t hzb = FIXED_MIN, hzt = FIXED_MAX;
if (spr->bIsVoxel && spr->floorclip != 0)
{
hzb = spr->gzb;
}
if (spr->heightsec && !(spr->heightsec->MoreFlags & SECF_IGNOREHEIGHTSEC))
{ // only things in specially marked sectors
if (spr->FakeFlatStat != FAKED_AboveCeiling)
{
fixed_t hz = spr->heightsec->floorplane.ZatPoint (spr->gx, spr->gy);
fixed_t h = (centeryfrac - FixedMul (hz-viewz, scale)) >> FRACBITS;
if (spr->FakeFlatStat == FAKED_BelowFloor)
{ // seen below floor: clip top
if (!spr->bIsVoxel && h > topclip)
{
topclip = MIN<short> (h, viewheight);
}
hzt = MIN(hzt, hz);
}
else
{ // seen in the middle: clip bottom
if (!spr->bIsVoxel && h < botclip)
{
botclip = MAX<short> (0, h);
}
hzb = MAX(hzb, hz);
}
}
if (spr->FakeFlatStat != FAKED_BelowFloor && !(spr->heightsec->MoreFlags & SECF_FAKEFLOORONLY))
{
fixed_t hz = spr->heightsec->ceilingplane.ZatPoint (spr->gx, spr->gy);
fixed_t h = (centeryfrac - FixedMul (hz-viewz, scale)) >> FRACBITS;
if (spr->FakeFlatStat == FAKED_AboveCeiling)
{ // seen above ceiling: clip bottom
if (!spr->bIsVoxel && h < botclip)
{
botclip = MAX<short> (0, h);
}
hzb = MAX(hzb, hz);
}
else
{ // seen in the middle: clip top
if (!spr->bIsVoxel && h > topclip)
{
topclip = MIN<short> (h, viewheight);
}
hzt = MIN(hzt, hz);
}
}
}
// killough 3/27/98: end special clipping for deep water / fake ceilings
else if (!spr->bIsVoxel && spr->floorclip)
{ // [RH] Move floorclip stuff from R_DrawVisSprite to here
int clip = ((centeryfrac - FixedMul (spr->texturemid -
(spr->pic->GetHeight() << FRACBITS) +
spr->floorclip, spr->yscale)) >> FRACBITS);
if (clip < botclip)
{
botclip = MAX<short> (0, clip);
}
}
if (fake3D & FAKE3D_CLIPBOTTOM)
{
if (!spr->bIsVoxel)
{
fixed_t h = sclipBottom;
if (spr->fakefloor)
{
fixed_t floorz = spr->fakefloor->top.plane->Zat0();
if (viewz > floorz && floorz == sclipBottom )
{
h = spr->fakefloor->bottom.plane->Zat0();
}
}
h = (centeryfrac - FixedMul(h-viewz, scale)) >> FRACBITS;
if (h < botclip)
{
botclip = MAX<short>(0, h);
}
}
hzb = MAX(hzb, sclipBottom);
}
if (fake3D & FAKE3D_CLIPTOP)
{
if (!spr->bIsVoxel)
{
fixed_t h = sclipTop;
if (spr->fakeceiling != NULL)
{
fixed_t ceilingz = spr->fakeceiling->bottom.plane->Zat0();
if (viewz < ceilingz && ceilingz == sclipTop)
{
h = spr->fakeceiling->top.plane->Zat0();
}
}
h = (centeryfrac - FixedMul (h-viewz, scale)) >> FRACBITS;
if (h > topclip)
{
topclip = MIN<short>(h, viewheight);
}
}
hzt = MIN(hzt, sclipTop);
}
#if 0
// [RH] Sprites that were split by a drawseg should also be clipped
// by the sector's floor and ceiling. (Not sure how/if to handle this
// with fake floors, since those already do clipping.)
if (spr->bSplitSprite &&
(spr->heightsec == NULL || (spr->heightsec->MoreFlags & SECF_IGNOREHEIGHTSEC)))
{
fixed_t h = spr->sector->floorplane.ZatPoint (spr->gx, spr->gy);
h = (centeryfrac - FixedMul (h-viewz, scale)) >> FRACBITS;
if (h < botclip)
{
botclip = MAX<short> (0, h);
}
h = spr->sector->ceilingplane.ZatPoint (spr->gx, spr->gy);
h = (centeryfrac - FixedMul (h-viewz, scale)) >> FRACBITS;
if (h > topclip)
{
topclip = MIN<short> (h, viewheight);
}
}
#endif
if (topclip >= botclip)
{
spr->Style.colormap = colormap;
return;
}
i = x2 - x1;
clip1 = clipbot + x1;
clip2 = cliptop + x1;
do
{
*clip1++ = botclip;
*clip2++ = topclip;
} while (--i);
// Scan drawsegs from end to start for obscuring segs.
// The first drawseg that is closer than the sprite is the clip seg.
// Modified by Lee Killough:
// (pointer check was originally nonportable
// and buggy, by going past LEFT end of array):
// for (ds=ds_p-1 ; ds >= drawsegs ; ds--) old buggy code
for (ds = ds_p; ds-- > firstdrawseg; ) // new -- killough
{
// [ZZ] portal handling here
//if (ds->CurrentPortalUniq != spr->CurrentPortalUniq)
// continue;
// [ZZ] WARNING: uncommenting the two above lines, totally breaks sprite clipping
// kg3D - no clipping on fake segs
if (ds->fake) continue;
// determine if the drawseg obscures the sprite
if (ds->x1 >= x2 || ds->x2 <= x1 ||
(!(ds->silhouette & SIL_BOTH) && ds->maskedtexturecol == -1 &&
!ds->bFogBoundary) )
{
// does not cover sprite
continue;
}
r1 = MAX<int> (ds->x1, x1);
r2 = MIN<int> (ds->x2, x2);
fixed_t neardepth, fardepth;
if (!spr->bWallSprite)
{
if (ds->sz1 < ds->sz2)
{
neardepth = ds->sz1, fardepth = ds->sz2;
}
else
{
neardepth = ds->sz2, fardepth = ds->sz1;
}
}
// Check if sprite is in front of draw seg:
if ((!spr->bWallSprite && neardepth > spr->depth) || ((spr->bWallSprite || fardepth > spr->depth) &&
DMulScale32(spr->gy - ds->curline->v1->y, ds->curline->v2->x - ds->curline->v1->x,
ds->curline->v1->x - spr->gx, ds->curline->v2->y - ds->curline->v1->y) <= 0))
{
// seg is behind sprite, so draw the mid texture if it has one
if (ds->CurrentPortalUniq == CurrentPortalUniq && // [ZZ] instead, portal uniq check is made here
(ds->maskedtexturecol != -1 || ds->bFogBoundary))
R_RenderMaskedSegRange (ds, r1, r2);
continue;
}
// clip this piece of the sprite
// killough 3/27/98: optimized and made much shorter
// [RH] Optimized further (at least for VC++;
// other compilers should be at least as good as before)
if (ds->silhouette & SIL_BOTTOM) //bottom sil
{
clip1 = clipbot + r1;
clip2 = openings + ds->sprbottomclip + r1 - ds->x1;
i = r2 - r1;
do
{
if (*clip1 > *clip2)
*clip1 = *clip2;
clip1++;
clip2++;
} while (--i);
}
if (ds->silhouette & SIL_TOP) // top sil
{
clip1 = cliptop + r1;
clip2 = openings + ds->sprtopclip + r1 - ds->x1;
i = r2 - r1;
do
{
if (*clip1 < *clip2)
*clip1 = *clip2;
clip1++;
clip2++;
} while (--i);
}
}
// all clipping has been performed, so draw the sprite
if (!spr->bIsVoxel)
{
mfloorclip = clipbot;
mceilingclip = cliptop;
if (!spr->bWallSprite)
{
R_DrawVisSprite(spr);
}
else
{
R_DrawWallSprite(spr);
}
}
else
{
// If it is completely clipped away, don't bother drawing it.
if (cliptop[x2] >= clipbot[x2])
{
for (i = x1; i < x2; ++i)
{
if (cliptop[i] < clipbot[i])
{
break;
}
}
if (i == x2)
{
spr->Style.colormap = colormap;
return;
}
}
// Add everything outside the left and right edges to the clipping array
// for R_DrawVisVoxel().
if (x1 > 0)
{
clearbufshort(cliptop, x1, viewheight);
}
if (x2 < viewwidth - 1)
{
clearbufshort(cliptop + x2, viewwidth - x2, viewheight);
}
int minvoxely = spr->gzt <= hzt ? 0 : (spr->gzt - hzt) / spr->yscale;
int maxvoxely = spr->gzb > hzb ? INT_MAX : (spr->gzt - hzb) / spr->yscale;
R_DrawVisVoxel(spr, minvoxely, maxvoxely, cliptop, clipbot);
}
spr->Style.colormap = colormap;
}
// kg3D:
// R_DrawMasked contains sorting
// original renamed to R_DrawMaskedSingle
void R_DrawMaskedSingle (bool renew)
{
drawseg_t *ds;
int i;
#if 0
R_SplitVisSprites ();
#endif
for (i = vsprcount; i > 0; i--)
{
if (spritesorter[i-1]->CurrentPortalUniq != CurrentPortalUniq)
continue; // probably another time
R_DrawSprite (spritesorter[i-1]);
}
// render any remaining masked mid textures
// Modified by Lee Killough:
// (pointer check was originally nonportable
// and buggy, by going past LEFT end of array):
// for (ds=ds_p-1 ; ds >= drawsegs ; ds--) old buggy code
if (renew)
{
fake3D |= FAKE3D_REFRESHCLIP;
}
for (ds = ds_p; ds-- > firstdrawseg; ) // new -- killough
{
// [ZZ] the same as above
if (ds->CurrentPortalUniq != CurrentPortalUniq)
continue;
// kg3D - no fake segs
if (ds->fake) continue;
if (ds->maskedtexturecol != -1 || ds->bFogBoundary)
{
R_RenderMaskedSegRange (ds, ds->x1, ds->x2);
}
}
}
void R_DrawHeightPlanes(fixed_t height); // kg3D - fake planes
void R_DrawMasked (void)
{
R_SortVisSprites (DrewAVoxel ? sv_compare2d : sv_compare, firstvissprite - vissprites);
if (height_top == NULL)
{ // kg3D - no visible 3D floors, normal rendering
R_DrawMaskedSingle(false);
}
else
{ // kg3D - correct sorting
HeightLevel *hl;
// ceilings
for (hl = height_cur; hl != NULL && hl->height >= viewz; hl = hl->prev)
{
if (hl->next)
{
fake3D = FAKE3D_CLIPBOTTOM | FAKE3D_CLIPTOP;
sclipTop = hl->next->height;
}
else
{
fake3D = FAKE3D_CLIPBOTTOM;
}
sclipBottom = hl->height;
R_DrawMaskedSingle(true);
R_DrawHeightPlanes(hl->height);
}
// floors
fake3D = FAKE3D_DOWN2UP | FAKE3D_CLIPTOP;
sclipTop = height_top->height;
R_DrawMaskedSingle(true);
hl = height_top;
for (hl = height_top; hl != NULL && hl->height < viewz; hl = hl->next)
{
R_DrawHeightPlanes(hl->height);
if (hl->next)
{
fake3D = FAKE3D_DOWN2UP | FAKE3D_CLIPTOP | FAKE3D_CLIPBOTTOM;
sclipTop = hl->next->height;
}
else
{
fake3D = FAKE3D_DOWN2UP | FAKE3D_CLIPBOTTOM;
}
sclipBottom = hl->height;
R_DrawMaskedSingle(true);
}
R_3D_DeleteHeights();
fake3D = 0;
}
R_DrawPlayerSprites ();
}
void R_ProjectParticle (particle_t *particle, const sector_t *sector, int shade, int fakeside)
{
fixed_t tr_x;
fixed_t tr_y;
fixed_t tx, ty;
fixed_t tz, tiz;
fixed_t xscale, yscale;
int x1, x2, y1, y2;
vissprite_t* vis;
sector_t* heightsec = NULL;
BYTE* map;
// [ZZ] Particle not visible through the portal plane
if (CurrentPortal && !!P_PointOnLineSide(particle->x, particle->y, CurrentPortal->dst))
return;
// transform the origin point
tr_x = particle->x - viewx;
tr_y = particle->y - viewy;
tz = DMulScale20 (tr_x, viewtancos, tr_y, viewtansin);
// particle is behind view plane?
if (tz < MINZ)
return;
tx = DMulScale20 (tr_x, viewsin, -tr_y, viewcos);
// Flip for mirrors
if (MirrorFlags & RF_XFLIP)
{
tx = viewwidth - tx - 1;
}
// too far off the side?
if (tz <= abs (tx))
return;
tiz = 268435456 / tz;
xscale = centerx * tiz;
// calculate edges of the shape
int psize = particle->size << (12-3);
x1 = MAX<int> (WindowLeft, (centerxfrac + MulScale12 (tx-psize, xscale)) >> FRACBITS);
x2 = MIN<int> (WindowRight, (centerxfrac + MulScale12 (tx+psize, xscale)) >> FRACBITS);
if (x1 >= x2)
return;
yscale = MulScale16 (yaspectmul, xscale);
ty = particle->z - viewz;
psize <<= 4;
y1 = (centeryfrac - FixedMul (ty+psize, yscale)) >> FRACBITS;
y2 = (centeryfrac - FixedMul (ty-psize, yscale)) >> FRACBITS;
// Clip the particle now. Because it's a point and projected as its subsector is
// entered, we don't need to clip it to drawsegs like a normal sprite.
// Clip particles behind walls.
if (y1 < ceilingclip[x1]) y1 = ceilingclip[x1];
if (y1 < ceilingclip[x2-1]) y1 = ceilingclip[x2-1];
if (y2 >= floorclip[x1]) y2 = floorclip[x1] - 1;
if (y2 >= floorclip[x2-1]) y2 = floorclip[x2-1] - 1;
if (y1 > y2)
return;
// Clip particles above the ceiling or below the floor.
heightsec = sector->GetHeightSec();
const secplane_t *topplane;
const secplane_t *botplane;
FTextureID toppic;
FTextureID botpic;
if (heightsec) // only clip things which are in special sectors
{
if (fakeside == FAKED_AboveCeiling)
{
topplane = &sector->ceilingplane;
botplane = &heightsec->ceilingplane;
toppic = sector->GetTexture(sector_t::ceiling);
botpic = heightsec->GetTexture(sector_t::ceiling);
map = heightsec->ColorMap->Maps;
}
else if (fakeside == FAKED_BelowFloor)
{
topplane = &heightsec->floorplane;
botplane = &sector->floorplane;
toppic = heightsec->GetTexture(sector_t::floor);
botpic = sector->GetTexture(sector_t::floor);
map = heightsec->ColorMap->Maps;
}
else
{
topplane = &heightsec->ceilingplane;
botplane = &heightsec->floorplane;
toppic = heightsec->GetTexture(sector_t::ceiling);
botpic = heightsec->GetTexture(sector_t::floor);
map = sector->ColorMap->Maps;
}
}
else
{
topplane = &sector->ceilingplane;
botplane = &sector->floorplane;
toppic = sector->GetTexture(sector_t::ceiling);
botpic = sector->GetTexture(sector_t::floor);
map = sector->ColorMap->Maps;
}
if (botpic != skyflatnum && particle->z < botplane->ZatPoint (particle->x, particle->y))
return;
if (toppic != skyflatnum && particle->z >= topplane->ZatPoint (particle->x, particle->y))
return;
// store information in a vissprite
vis = R_NewVisSprite ();
vis->CurrentPortalUniq = CurrentPortalUniq;
vis->heightsec = heightsec;
vis->xscale = xscale;
// vis->yscale = FixedMul (xscale, InvZtoScale);
vis->yscale = xscale;
vis->depth = tz;
vis->idepth = (DWORD)DivScale32 (1, tz) >> 1;
vis->gx = particle->x;
vis->gy = particle->y;
vis->gz = particle->z; // kg3D
vis->gzb = y1;
vis->gzt = y2;
vis->x1 = x1;
vis->x2 = x2;
vis->Translation = 0;
vis->startfrac = 255 & (particle->color >>24);
vis->pic = NULL;
vis->bIsVoxel = false;
vis->renderflags = particle->trans;
vis->FakeFlatStat = fakeside;
vis->floorclip = 0;
vis->ColormapNum = 0;
if (fixedlightlev >= 0)
{
vis->Style.colormap = map + fixedlightlev;
}
else if (fixedcolormap)
{
vis->Style.colormap = fixedcolormap;
}
else if(particle->bright) {
vis->Style.colormap = map;
}
else
{
// Using MulScale15 instead of 16 makes particles slightly more visible
// than regular sprites.
vis->ColormapNum = GETPALOOKUP(MulScale15 (tiz, r_SpriteVisibility), shade);
vis->Style.colormap = map + (vis->ColormapNum << COLORMAPSHIFT);
}
}
static void R_DrawMaskedSegsBehindParticle (const vissprite_t *vis)
{
const int x1 = vis->x1;
const int x2 = vis->x2;
// Draw any masked textures behind this particle so that when the
// particle is drawn, it will be in front of them.
for (unsigned int p = InterestingDrawsegs.Size(); p-- > FirstInterestingDrawseg; )
{
drawseg_t *ds = &drawsegs[InterestingDrawsegs[p]];
// kg3D - no fake segs
if(ds->fake) continue;
if (ds->x1 >= x2 || ds->x2 <= x1)
{
continue;
}
if (Scale (ds->siz2 - ds->siz1, (x2 + x1)/2 - ds->sx1, ds->sx2 - ds->sx1) + ds->siz1 < vis->idepth)
{
// [ZZ] only draw stuff that's inside the same portal as the particle, other portals will care for themselves
if (ds->CurrentPortalUniq == vis->CurrentPortalUniq)
R_RenderMaskedSegRange (ds, MAX<int>(ds->x1, x1), MIN<int>(ds->x2, x2));
}
}
}
void R_DrawParticle (vissprite_t *vis)
{
DWORD *bg2rgb;
int spacing;
BYTE *dest;
DWORD fg;
BYTE color = vis->Style.colormap[vis->startfrac];
int yl = vis->gzb;
int ycount = vis->gzt - yl + 1;
int x1 = vis->x1;
int countbase = vis->x2 - x1;
R_DrawMaskedSegsBehindParticle (vis);
// vis->renderflags holds translucency level (0-255)
{
fixed_t fglevel, bglevel;
DWORD *fg2rgb;
fglevel = ((vis->renderflags + 1) << 8) & ~0x3ff;
bglevel = FRACUNIT-fglevel;
fg2rgb = Col2RGB8[fglevel>>10];
bg2rgb = Col2RGB8[bglevel>>10];
fg = fg2rgb[color];
}
/*
spacing = RenderTarget->GetPitch() - countbase;
dest = ylookup[yl] + x1 + dc_destorg;
do
{
int count = countbase;
do
{
DWORD bg = bg2rgb[*dest];
bg = (fg+bg) | 0x1f07c1f;
*dest++ = RGB32k.All[bg & (bg>>15)];
} while (--count);
dest += spacing;
} while (--ycount);*/
// original was row-wise
// width = countbase
// height = ycount
spacing = RenderTarget->GetPitch();
for (int x = x1; x < (x1+countbase); x++)
{
dc_x = x;
if (R_ClipSpriteColumnWithPortals(vis->gx, vis->gy, vis))
continue;
dest = ylookup[yl] + x + dc_destorg;
for (int y = 0; y < ycount; y++)
{
DWORD bg = bg2rgb[*dest];
bg = (fg+bg) | 0x1f07c1f;
*dest = RGB32k.All[bg & (bg>>15)];
dest += spacing;
}
}
}
extern fixed_t baseyaspectmul;
void R_DrawVoxel(fixed_t globalposx, fixed_t globalposy, fixed_t globalposz, angle_t viewang,
fixed_t dasprx, fixed_t daspry, fixed_t dasprz, angle_t dasprang,
fixed_t daxscale, fixed_t dayscale, FVoxel *voxobj,
lighttable_t *colormap, short *daumost, short *dadmost, int minslabz, int maxslabz, int flags)
{
int i, j, k, x, y, syoff, ggxstart, ggystart, nxoff;
fixed_t cosang, sinang, sprcosang, sprsinang;
int backx, backy, gxinc, gyinc;
int daxscalerecip, dayscalerecip, cnt, gxstart, gystart, dazscale;
int lx, rx, nx, ny, x1=0, y1=0, x2=0, y2=0, yinc=0;
int yoff, xs=0, ys=0, xe, ye, xi=0, yi=0, cbackx, cbacky, dagxinc, dagyinc;
kvxslab_t *voxptr, *voxend;
FVoxelMipLevel *mip;
int z1a[64], z2a[64], yplc[64];
const int nytooclose = centerxwide * 2100, nytoofar = 32768*32768 - 1048576;
const int xdimenscale = Scale(centerxwide, yaspectmul, 160);
const double centerxwide_f = centerxwide;
const double centerxwidebig_f = centerxwide_f * 65536*65536*8;
// Convert to Build's coordinate system.
globalposx = globalposx >> 12;
globalposy = -globalposy >> 12;
globalposz = -globalposz >> 8;
dasprx = dasprx >> 12;
daspry = -daspry >> 12;
dasprz = -dasprz >> 8;
// Shift the scales from 16 bits of fractional precision to 6.
// Also do some magic voodoo scaling to make them the right size.
daxscale = daxscale / (0xC000 >> 6);
dayscale = dayscale / (0xC000 >> 6);
cosang = finecosine[viewang >> ANGLETOFINESHIFT] >> 2;
sinang = -finesine[viewang >> ANGLETOFINESHIFT] >> 2;
sprcosang = finecosine[dasprang >> ANGLETOFINESHIFT] >> 2;
sprsinang = -finesine[dasprang >> ANGLETOFINESHIFT] >> 2;
R_SetupDrawSlab(colormap);
// Select mip level
i = abs(DMulScale6(dasprx - globalposx, cosang, daspry - globalposy, sinang));
i = DivScale6(i, MIN(daxscale, dayscale));
j = FocalLengthX >> 3;
for (k = 0; i >= j && k < voxobj->NumMips; ++k)
{
i >>= 1;
}
if (k >= voxobj->NumMips) k = voxobj->NumMips - 1;
mip = &voxobj->Mips[k]; if (mip->SlabData == NULL) return;
minslabz >>= k;
maxslabz >>= k;
daxscale <<= (k+8); dayscale <<= (k+8);
dazscale = FixedDiv(dayscale, baseyaspectmul);
daxscale = FixedDiv(daxscale, yaspectmul);
daxscale = Scale(daxscale, xdimenscale, centerxwide << 9);
dayscale = Scale(dayscale, FixedMul(xdimenscale, viewingrangerecip), centerxwide << 9);
daxscalerecip = (1<<30) / daxscale;
dayscalerecip = (1<<30) / dayscale;
x = FixedMul(globalposx - dasprx, daxscalerecip);
y = FixedMul(globalposy - daspry, daxscalerecip);
backx = (DMulScale10(x, sprcosang, y, sprsinang) + mip->PivotX) >> 8;
backy = (DMulScale10(y, sprcosang, x, -sprsinang) + mip->PivotY) >> 8;
cbackx = clamp(backx, 0, mip->SizeX - 1);
cbacky = clamp(backy, 0, mip->SizeY - 1);
sprcosang = MulScale14(daxscale, sprcosang);
sprsinang = MulScale14(daxscale, sprsinang);
x = (dasprx - globalposx) - DMulScale18(mip->PivotX, sprcosang, mip->PivotY, -sprsinang);
y = (daspry - globalposy) - DMulScale18(mip->PivotY, sprcosang, mip->PivotX, sprsinang);
cosang = FixedMul(cosang, dayscalerecip);
sinang = FixedMul(sinang, dayscalerecip);
gxstart = y*cosang - x*sinang;
gystart = x*cosang + y*sinang;
gxinc = DMulScale10(sprsinang, cosang, sprcosang, -sinang);
gyinc = DMulScale10(sprcosang, cosang, sprsinang, sinang);
if ((abs(globalposz - dasprz) >> 10) >= abs(dazscale)) return;
x = 0; y = 0; j = MAX(mip->SizeX, mip->SizeY);
fixed_t *ggxinc = (fixed_t *)alloca((j + 1) * sizeof(fixed_t) * 2);
fixed_t *ggyinc = ggxinc + (j + 1);
for (i = 0; i <= j; i++)
{
ggxinc[i] = x; x += gxinc;
ggyinc[i] = y; y += gyinc;
}
syoff = DivScale21(globalposz - dasprz, FixedMul(dazscale, 0xE800)) + (mip->PivotZ << 7);
yoff = (abs(gxinc) + abs(gyinc)) >> 1;
for (cnt = 0; cnt < 8; cnt++)
{
switch (cnt)
{
case 0: xs = 0; ys = 0; xi = 1; yi = 1; break;
case 1: xs = mip->SizeX-1; ys = 0; xi = -1; yi = 1; break;
case 2: xs = 0; ys = mip->SizeY-1; xi = 1; yi = -1; break;
case 3: xs = mip->SizeX-1; ys = mip->SizeY-1; xi = -1; yi = -1; break;
case 4: xs = 0; ys = cbacky; xi = 1; yi = 2; break;
case 5: xs = mip->SizeX-1; ys = cbacky; xi = -1; yi = 2; break;
case 6: xs = cbackx; ys = 0; xi = 2; yi = 1; break;
case 7: xs = cbackx; ys = mip->SizeY-1; xi = 2; yi = -1; break;
}
xe = cbackx; ye = cbacky;
if (cnt < 4)
{
if ((xi < 0) && (xe >= xs)) continue;
if ((xi > 0) && (xe <= xs)) continue;
if ((yi < 0) && (ye >= ys)) continue;
if ((yi > 0) && (ye <= ys)) continue;
}
else
{
if ((xi < 0) && (xe > xs)) continue;
if ((xi > 0) && (xe < xs)) continue;
if ((yi < 0) && (ye > ys)) continue;
if ((yi > 0) && (ye < ys)) continue;
xe += xi; ye += yi;
}
i = ksgn(ys-backy)+ksgn(xs-backx)*3+4;
switch(i)
{
case 6: case 7: x1 = 0; y1 = 0; break;
case 8: case 5: x1 = gxinc; y1 = gyinc; break;
case 0: case 3: x1 = gyinc; y1 = -gxinc; break;
case 2: case 1: x1 = gxinc+gyinc; y1 = gyinc-gxinc; break;
}
switch(i)
{
case 2: case 5: x2 = 0; y2 = 0; break;
case 0: case 1: x2 = gxinc; y2 = gyinc; break;
case 8: case 7: x2 = gyinc; y2 = -gxinc; break;
case 6: case 3: x2 = gxinc+gyinc; y2 = gyinc-gxinc; break;
}
BYTE oand = (1 << int(xs<backx)) + (1 << (int(ys<backy)+2));
BYTE oand16 = oand + 16;
BYTE oand32 = oand + 32;
if (yi > 0) { dagxinc = gxinc; dagyinc = FixedMul(gyinc, viewingrangerecip); }
else { dagxinc = -gxinc; dagyinc = -FixedMul(gyinc, viewingrangerecip); }
/* Fix for non 90 degree viewing ranges */
nxoff = FixedMul(x2 - x1, viewingrangerecip);
x1 = FixedMul(x1, viewingrangerecip);
ggxstart = gxstart + ggyinc[ys];
ggystart = gystart - ggxinc[ys];
for (x = xs; x != xe; x += xi)
{
BYTE *slabxoffs = &mip->SlabData[mip->OffsetX[x]];
short *xyoffs = &mip->OffsetXY[x * (mip->SizeY + 1)];
nx = FixedMul(ggxstart + ggxinc[x], viewingrangerecip) + x1;
ny = ggystart + ggyinc[x];
for (y = ys; y != ye; y += yi, nx += dagyinc, ny -= dagxinc)
{
if ((ny <= nytooclose) || (ny >= nytoofar)) continue;
voxptr = (kvxslab_t *)(slabxoffs + xyoffs[y]);
voxend = (kvxslab_t *)(slabxoffs + xyoffs[y+1]);
if (voxptr >= voxend) continue;
lx = xs_RoundToInt(nx * centerxwide_f / (ny + y1)) + centerx;
if (lx < 0) lx = 0;
rx = xs_RoundToInt((nx + nxoff) * centerxwide_f / (ny + y2)) + centerx;
if (rx > viewwidth) rx = viewwidth;
if (rx <= lx) continue;
if (flags & DVF_MIRRORED)
{
int t = viewwidth - lx;
lx = viewwidth - rx;
rx = t;
}
fixed_t l1 = xs_RoundToInt(centerxwidebig_f / (ny - yoff));
fixed_t l2 = xs_RoundToInt(centerxwidebig_f / (ny + yoff));
for (; voxptr < voxend; voxptr = (kvxslab_t *)((BYTE *)voxptr + voxptr->zleng + 3))
{
const BYTE *col = voxptr->col;
int zleng = voxptr->zleng;
int ztop = voxptr->ztop;
fixed_t z1, z2;
if (ztop < minslabz)
{
int diff = minslabz - ztop;
ztop = minslabz;
col += diff;
zleng -= diff;
}
if (ztop + zleng > maxslabz)
{
int diff = ztop + zleng - maxslabz;
zleng -= diff;
}
if (zleng <= 0) continue;
j = (ztop << 15) - syoff;
if (j < 0)
{
k = j + (zleng << 15);
if (k < 0)
{
if ((voxptr->backfacecull & oand32) == 0) continue;
z2 = MulScale32(l2, k) + centery; /* Below slab */
}
else
{
if ((voxptr->backfacecull & oand) == 0) continue; /* Middle of slab */
z2 = MulScale32(l1, k) + centery;
}
z1 = MulScale32(l1, j) + centery;
}
else
{
if ((voxptr->backfacecull & oand16) == 0) continue;
z1 = MulScale32(l2, j) + centery; /* Above slab */
z2 = MulScale32(l1, j + (zleng << 15)) + centery;
}
if (z2 <= z1) continue;
if (zleng == 1)
{
yinc = 0;
}
else
{
if (z2-z1 >= 1024) yinc = FixedDiv(zleng, z2 - z1);
else yinc = (((1 << 24) - 1) / (z2 - z1)) * zleng >> 8;
}
// [RH] Clip each column separately, not just by the first one.
for (int stripwidth = MIN<int>(countof(z1a), rx - lx), lxt = lx;
lxt < rx;
(lxt += countof(z1a)), stripwidth = MIN<int>(countof(z1a), rx - lxt))
{
// Calculate top and bottom pixels locations
for (int xxx = 0; xxx < stripwidth; ++xxx)
{
if (zleng == 1)
{
yplc[xxx] = 0;
z1a[xxx] = MAX<int>(z1, daumost[lxt + xxx]);
}
else
{
if (z1 < daumost[lxt + xxx])
{
yplc[xxx] = yinc * (daumost[lxt + xxx] - z1);
z1a[xxx] = daumost[lxt + xxx];
}
else
{
yplc[xxx] = 0;
z1a[xxx] = z1;
}
}
z2a[xxx] = MIN<int>(z2, dadmost[lxt + xxx]);
}
// Find top and bottom pixels that match and draw them as one strip
for (int xxl = 0, xxr; xxl < stripwidth; )
{
if (z1a[xxl] >= z2a[xxl])
{ // No column here
xxl++;
continue;
}
int z1 = z1a[xxl];
int z2 = z2a[xxl];
// How many columns share the same extents?
for (xxr = xxl + 1; xxr < stripwidth; ++xxr)
{
if (z1a[xxr] != z1 || z2a[xxr] != z2)
break;
}
if (!(flags & DVF_OFFSCREEN))
{
// Draw directly to the screen.
R_DrawSlab(xxr - xxl, yplc[xxl], z2 - z1, yinc, col, ylookup[z1] + lxt + xxl + dc_destorg);
}
else
{
// Record the area covered and possibly draw to an offscreen buffer.
dc_yl = z1;
dc_yh = z2 - 1;
dc_count = z2 - z1;
dc_iscale = yinc;
for (int x = xxl; x < xxr; ++x)
{
OffscreenCoverageBuffer->InsertSpan(lxt + x, z1, z2);
if (!(flags & DVF_SPANSONLY))
{
dc_x = lxt + x;
rt_initcols(OffscreenColorBuffer + (dc_x & ~3) * OffscreenBufferHeight);
dc_source = col;
dc_texturefrac = yplc[xxl];
hcolfunc_pre();
}
}
}
xxl = xxr;
}
}
}
}
}
}
}
//==========================================================================
//
// FCoverageBuffer Constructor
//
//==========================================================================
FCoverageBuffer::FCoverageBuffer(int lists)
: Spans(NULL), FreeSpans(NULL)
{
NumLists = lists;
Spans = new Span *[lists];
memset(Spans, 0, sizeof(Span*)*lists);
}
//==========================================================================
//
// FCoverageBuffer Destructor
//
//==========================================================================
FCoverageBuffer::~FCoverageBuffer()
{
if (Spans != NULL)
{
delete[] Spans;
}
}
//==========================================================================
//
// FCoverageBuffer :: Clear
//
//==========================================================================
void FCoverageBuffer::Clear()
{
SpanArena.FreeAll();
memset(Spans, 0, sizeof(Span*)*NumLists);
FreeSpans = NULL;
}
//==========================================================================
//
// FCoverageBuffer :: InsertSpan
//
// start is inclusive.
// stop is exclusive.
//
//==========================================================================
void FCoverageBuffer::InsertSpan(int listnum, int start, int stop)
{
assert(unsigned(listnum) < NumLists);
assert(start < stop);
Span **span_p = &Spans[listnum];
Span *span;
if (*span_p == NULL || (*span_p)->Start > stop)
{ // This list is empty or the first entry is after this one, so we can just insert the span.
goto addspan;
}
// Insert the new span in order, merging with existing ones.
while (*span_p != NULL)
{
if ((*span_p)->Stop < start) // ===== (existing span)
{ // Span ends before this one starts. // ++++ (new span)
span_p = &(*span_p)->NextSpan;
continue;
}
// Does the new span overlap or abut the existing one?
if ((*span_p)->Start <= start)
{
if ((*span_p)->Stop >= stop) // =============
{ // The existing span completely covers this one. // +++++
return;
}
extend: // Extend the existing span with the new one. // ======
span = *span_p; // +++++++
span->Stop = stop; // (or) +++++
// Free up any spans we just covered up.
span_p = &(*span_p)->NextSpan;
while (*span_p != NULL && (*span_p)->Start <= stop && (*span_p)->Stop <= stop)
{
Span *span = *span_p; // ====== ======
*span_p = span->NextSpan; // +++++++++++++
span->NextSpan = FreeSpans;
FreeSpans = span;
}
if (*span_p != NULL && (*span_p)->Start <= stop) // ======= ========
{ // Our new span connects two existing spans. // ++++++++++++++
// They should all be collapsed into a single span.
span->Stop = (*span_p)->Stop;
span = *span_p;
*span_p = span->NextSpan;
span->NextSpan = FreeSpans;
FreeSpans = span;
}
goto check;
}
else if ((*span_p)->Start <= stop) // =====
{ // The new span extends the existing span from // ++++
// the beginning. // (or) ++++
(*span_p)->Start = start;
if ((*span_p)->Stop < stop)
{ // The new span also extends the existing span // ======
// at the bottom // ++++++++++++++
goto extend;
}
goto check;
}
else // ======
{ // No overlap, so insert a new span. // +++++
goto addspan;
}
}
// Append a new span to the end of the list.
addspan:
span = AllocSpan();
span->NextSpan = *span_p;
span->Start = start;
span->Stop = stop;
*span_p = span;
check:
#ifdef _DEBUG
// Validate the span list: Spans must be in order, and there must be
// at least one pixel between spans.
for (span = Spans[listnum]; span != NULL; span = span->NextSpan)
{
assert(span->Start < span->Stop);
if (span->NextSpan != NULL)
{
assert(span->Stop < span->NextSpan->Start);
}
}
#endif
;
}
//==========================================================================
//
// FCoverageBuffer :: AllocSpan
//
//==========================================================================
FCoverageBuffer::Span *FCoverageBuffer::AllocSpan()
{
Span *span;
if (FreeSpans != NULL)
{
span = FreeSpans;
FreeSpans = span->NextSpan;
}
else
{
span = (Span *)SpanArena.Alloc(sizeof(Span));
}
return span;
}
//==========================================================================
//
// R_CheckOffscreenBuffer
//
// Allocates the offscreen coverage buffer and optionally the offscreen
// color buffer. If they already exist but are the wrong size, they will
// be reallocated.
//
//==========================================================================
void R_CheckOffscreenBuffer(int width, int height, bool spansonly)
{
if (OffscreenCoverageBuffer == NULL)
{
assert(OffscreenColorBuffer == NULL && "The color buffer cannot exist without the coverage buffer");
OffscreenCoverageBuffer = new FCoverageBuffer(width);
}
else if (OffscreenCoverageBuffer->NumLists != (unsigned)width)
{
delete OffscreenCoverageBuffer;
OffscreenCoverageBuffer = new FCoverageBuffer(width);
if (OffscreenColorBuffer != NULL)
{
delete[] OffscreenColorBuffer;
OffscreenColorBuffer = NULL;
}
}
else
{
OffscreenCoverageBuffer->Clear();
}
if (!spansonly)
{
if (OffscreenColorBuffer == NULL)
{
OffscreenColorBuffer = new BYTE[width * height];
}
else if (OffscreenBufferWidth != width || OffscreenBufferHeight != height)
{
delete[] OffscreenColorBuffer;
OffscreenColorBuffer = new BYTE[width * height];
}
}
OffscreenBufferWidth = width;
OffscreenBufferHeight = height;
}
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