void GLWall::RenderTextured(int rflags)
{
int tmode = gl_RenderState.GetTextureMode();
int rel = rellight + getExtraLight();
if (flags & GLWF_GLOW)
{
gl_RenderState.EnableGlow(true);
gl_RenderState.SetGlowPlanes(topplane, bottomplane);
gl_RenderState.SetGlowParams(topglowcolor, bottomglowcolor);
}
gl_RenderState.SetMaterial(gltexture, flags & 3, 0, -1, false);
if (type == RENDERWALL_M2SNF)
{
if (flags & GLT_CLAMPY)
{
if (tmode == TM_MODULATE) gl_RenderState.SetTextureMode(TM_CLAMPY);
}
gl_SetFog(255, 0, NULL, false);
}
float absalpha = fabsf(alpha);
if (lightlist == NULL)
{
gl_SetColor(lightlevel, rel, Colormap, absalpha);
if (type != RENDERWALL_M2SNF) gl_SetFog(lightlevel, rel, &Colormap, RenderStyle == STYLE_Add);
RenderWall(rflags);
}
else
{
gl_RenderState.EnableSplit(true);
for (unsigned i = 0; i < lightlist->Size(); i++)
{
secplane_t &lowplane = i == (*lightlist).Size() - 1 ? bottomplane : (*lightlist)[i + 1].plane;
// this must use the exact same calculation method as GLWall::Process etc.
float low1 = lowplane.ZatPoint(vertexes[0]);
float low2 = lowplane.ZatPoint(vertexes[1]);
if (low1 < ztop[0] || low2 < ztop[1])
{
int thisll = (*lightlist)[i].caster != NULL ? gl_ClampLight(*(*lightlist)[i].p_lightlevel) : lightlevel;
FColormap thiscm;
thiscm.FadeColor = Colormap.FadeColor;
thiscm.CopyFrom3DLight(&(*lightlist)[i]);
gl_SetColor(thisll, rel, thiscm, absalpha);
if (type != RENDERWALL_M2SNF) gl_SetFog(thisll, rel, &thiscm, RenderStyle == STYLE_Add);
gl_RenderState.SetSplitPlanes((*lightlist)[i].plane, lowplane);
RenderWall(rflags);
}
if (low1 <= zbottom[0] && low2 <= zbottom[1]) break;
}
gl_RenderState.EnableSplit(false);
}
gl_RenderState.SetTextureMode(tmode);
gl_RenderState.EnableGlow(false);
}
//==========================================================================
//
// Draw the plane segment into the gap
//
//==========================================================================
void FDrawInfo::DrawFloodedPlane(wallseg * ws, float planez, sector_t * sec, bool ceiling)
{
GLSectorPlane plane;
int lightlevel;
FColormap Colormap;
FMaterial * gltexture;
plane.GetFromSector(sec, ceiling);
gltexture=FMaterial::ValidateTexture(plane.texture, true);
if (!gltexture) return;
if (gl_fixedcolormap)
{
Colormap.Clear();
lightlevel=255;
}
else
{
Colormap=sec->ColorMap;
if (gltexture->tex->isFullbright())
{
Colormap.LightColor.r = Colormap.LightColor.g = Colormap.LightColor.b = 0xff;
lightlevel=255;
}
else lightlevel=abs(ceiling? sec->GetCeilingLight() : sec->GetFloorLight());
}
int rel = getExtraLight();
gl_SetColor(lightlevel, rel, Colormap, 1.0f);
gl_SetFog(lightlevel, rel, &Colormap, false);
gltexture->Bind();
float fviewx = FIXED2FLOAT(viewx);
float fviewy = FIXED2FLOAT(viewy);
float fviewz = FIXED2FLOAT(viewz);
gl_SetPlaneTextureRotation(&plane, gltexture);
gl_RenderState.Apply();
float prj_fac1 = (planez-fviewz)/(ws->z1-fviewz);
float prj_fac2 = (planez-fviewz)/(ws->z2-fviewz);
float px1 = fviewx + prj_fac1 * (ws->x1-fviewx);
float py1 = fviewy + prj_fac1 * (ws->y1-fviewy);
float px2 = fviewx + prj_fac2 * (ws->x1-fviewx);
float py2 = fviewy + prj_fac2 * (ws->y1-fviewy);
float px3 = fviewx + prj_fac2 * (ws->x2-fviewx);
float py3 = fviewy + prj_fac2 * (ws->y2-fviewy);
float px4 = fviewx + prj_fac1 * (ws->x2-fviewx);
float py4 = fviewy + prj_fac1 * (ws->y2-fviewy);
FFlatVertex *ptr = GLRenderer->mVBO->GetBuffer();
ptr->Set(px1, planez, py1, px1 / 64, -py1 / 64);
ptr++;
ptr->Set(px2, planez, py2, px2 / 64, -py2 / 64);
ptr++;
ptr->Set(px3, planez, py3, px3 / 64, -py3 / 64);
ptr++;
ptr->Set(px4, planez, py4, px4 / 64, -py4 / 64);
ptr++;
GLRenderer->mVBO->RenderCurrent(ptr, GL_TRIANGLE_FAN);
gl_RenderState.EnableTextureMatrix(false);
}
//==========================================================================
//
// Draw the plane segment into the gap
//
//==========================================================================
void FDrawInfo::DrawFloodedPlane(wallseg * ws, float planez, sector_t * sec, bool ceiling)
{
GLSectorPlane plane;
int lightlevel;
FColormap Colormap;
FMaterial * gltexture;
plane.GetFromSector(sec, ceiling);
gltexture=FMaterial::ValidateTexture(plane.texture, true);
if (!gltexture) return;
if (gl_fixedcolormap)
{
Colormap.GetFixedColormap();
lightlevel=255;
}
else
{
Colormap=sec->ColorMap;
if (gltexture->tex->isFullbright())
{
Colormap.LightColor.r = Colormap.LightColor.g = Colormap.LightColor.b = 0xff;
lightlevel=255;
}
else lightlevel=abs(ceiling? sec->GetCeilingLight() : sec->GetFloorLight());
}
int rel = getExtraLight();
gl_SetColor(lightlevel, rel, &Colormap, 1.0f);
gl_SetFog(lightlevel, rel, &Colormap, false);
gltexture->Bind(Colormap.colormap);
float fviewx = FIXED2FLOAT(viewx);
float fviewy = FIXED2FLOAT(viewy);
float fviewz = FIXED2FLOAT(viewz);
gl_RenderState.Apply();
bool pushed = gl_SetPlaneTextureRotation(&plane, gltexture);
glBegin(GL_TRIANGLE_FAN);
float prj_fac1 = (planez-fviewz)/(ws->z1-fviewz);
float prj_fac2 = (planez-fviewz)/(ws->z2-fviewz);
float px1 = fviewx + prj_fac1 * (ws->x1-fviewx);
float py1 = fviewy + prj_fac1 * (ws->y1-fviewy);
float px2 = fviewx + prj_fac2 * (ws->x1-fviewx);
float py2 = fviewy + prj_fac2 * (ws->y1-fviewy);
float px3 = fviewx + prj_fac2 * (ws->x2-fviewx);
float py3 = fviewy + prj_fac2 * (ws->y2-fviewy);
float px4 = fviewx + prj_fac1 * (ws->x2-fviewx);
float py4 = fviewy + prj_fac1 * (ws->y2-fviewy);
glTexCoord2f(px1 / 64, -py1 / 64);
glVertex3f(px1, planez, py1);
glTexCoord2f(px2 / 64, -py2 / 64);
glVertex3f(px2, planez, py2);
glTexCoord2f(px3 / 64, -py3 / 64);
glVertex3f(px3, planez, py3);
glTexCoord2f(px4 / 64, -py4 / 64);
glVertex3f(px4, planez, py4);
glEnd();
if (pushed)
{
glPopMatrix();
glMatrixMode(GL_MODELVIEW);
}
}
//==========================================================================
//
// Draw the plane segment into the gap
//
//==========================================================================
void FDrawInfo::DrawFloodedPlane(wallseg * ws, float planez, sector_t * sec, bool ceiling)
{
GLSectorPlane plane;
int lightlevel;
FColormap Colormap;
FMaterial * gltexture;
plane.GetFromSector(sec, ceiling);
gltexture=FMaterial::ValidateTexture(plane.texture, false, true);
if (!gltexture) return;
if (gl_fixedcolormap)
{
Colormap.Clear();
lightlevel=255;
}
else
{
Colormap=sec->ColorMap;
if (gltexture->tex->isFullbright())
{
Colormap.LightColor.r = Colormap.LightColor.g = Colormap.LightColor.b = 0xff;
lightlevel=255;
}
else lightlevel=abs(ceiling? sec->GetCeilingLight() : sec->GetFloorLight());
}
int rel = getExtraLight();
gl_SetColor(lightlevel, rel, Colormap, 1.0f);
gl_SetFog(lightlevel, rel, &Colormap, false);
gl_RenderState.SetMaterial(gltexture, CLAMP_NONE, 0, -1, false);
float fviewx = ViewPos.X;
float fviewy = ViewPos.Y;
float fviewz = ViewPos.Z;
gl_SetPlaneTextureRotation(&plane, gltexture);
gl_RenderState.Apply();
float prj_fac1 = (planez-fviewz)/(ws->z1-fviewz);
float prj_fac2 = (planez-fviewz)/(ws->z2-fviewz);
float px1 = fviewx + prj_fac1 * (ws->x1-fviewx);
float py1 = fviewy + prj_fac1 * (ws->y1-fviewy);
float px2 = fviewx + prj_fac2 * (ws->x1-fviewx);
float py2 = fviewy + prj_fac2 * (ws->y1-fviewy);
float px3 = fviewx + prj_fac2 * (ws->x2-fviewx);
float py3 = fviewy + prj_fac2 * (ws->y2-fviewy);
float px4 = fviewx + prj_fac1 * (ws->x2-fviewx);
float py4 = fviewy + prj_fac1 * (ws->y2-fviewy);
FQuadDrawer qd;
qd.Set(0, px1, planez, py1, px1 / 64, -py1 / 64);
qd.Set(1, px2, planez, py2, px2 / 64, -py2 / 64);
qd.Set(2, px3, planez, py3, px3 / 64, -py3 / 64);
qd.Set(3, px4, planez, py4, px4 / 64, -py4 / 64);
qd.Render(GL_TRIANGLE_FAN);
gl_RenderState.EnableTextureMatrix(false);
}
//==========================================================================
//
// Draw the plane segment into the gap
//
//==========================================================================
void GLDrawInfo::DrawFloodedPlane(wallseg * ws, float planez, sector_t * sec, bool ceiling)
{
GLSectorPlane plane;
int lightlevel;
FColormap Colormap;
FGLTexture * gltexture;
plane.GetFromSector(sec, ceiling);
gltexture=FGLTexture::ValidateTexture(plane.texture);
if (!gltexture) return;
if (gl_fixedcolormap)
{
Colormap.GetFixedColormap();
lightlevel=255;
}
else
{
Colormap=sec->ColorMap;
if (gltexture->tex->isFullbright())
{
Colormap.LightColor.r = Colormap.LightColor.g = Colormap.LightColor.b = 0xff;
lightlevel=255;
}
else lightlevel=abs(ceiling? GetCeilingLight(sec) : GetFloorLight(sec));
}
int rel = extralight * gl_weaponlight;
gl_SetColor(lightlevel, rel, &Colormap, 1.0f);
gl_SetFog(lightlevel, rel, &Colormap, false);
gltexture->Bind(Colormap.LightColor.a);
gl_SetPlaneTextureRotation(&plane, gltexture);
float fviewx = TO_GL(viewx);
float fviewy = TO_GL(viewy);
float fviewz = TO_GL(viewz);
gl_ApplyShader();
gl.Begin(GL_TRIANGLE_FAN);
float prj_fac1 = (planez-fviewz)/(ws->z1-fviewz);
float prj_fac2 = (planez-fviewz)/(ws->z2-fviewz);
float px1 = fviewx + prj_fac1 * (ws->x1-fviewx);
float py1 = fviewy + prj_fac1 * (ws->y1-fviewy);
float px2 = fviewx + prj_fac2 * (ws->x1-fviewx);
float py2 = fviewy + prj_fac2 * (ws->y1-fviewy);
float px3 = fviewx + prj_fac2 * (ws->x2-fviewx);
float py3 = fviewy + prj_fac2 * (ws->y2-fviewy);
float px4 = fviewx + prj_fac1 * (ws->x2-fviewx);
float py4 = fviewy + prj_fac1 * (ws->y2-fviewy);
gl.TexCoord2f(px1 / 64, -py1 / 64);
gl.Vertex3f(px1, planez, py1);
gl.TexCoord2f(px2 / 64, -py2 / 64);
gl.Vertex3f(px2, planez, py2);
gl.TexCoord2f(px3 / 64, -py3 / 64);
gl.Vertex3f(px3, planez, py3);
gl.TexCoord2f(px4 / 64, -py4 / 64);
gl.Vertex3f(px4, planez, py4);
gl.End();
gl.MatrixMode(GL_TEXTURE);
gl.PopMatrix();
gl.MatrixMode(GL_MODELVIEW);
}
void FGLRenderer::DrawPlayerSprites(sector_t * viewsector, bool hudModelStep)
{
bool brightflash = false;
unsigned int i;
int lightlevel=0;
FColormap cm;
sector_t * fakesec, fs;
AActor * playermo=players[consoleplayer].camera;
player_t * player=playermo->player;
// this is the same as the software renderer
if (!player ||
!r_drawplayersprites ||
!camera->player ||
(player->cheats & CF_CHASECAM) ||
(r_deathcamera && camera->health <= 0))
return;
float bobx, boby, wx, wy;
DPSprite *weapon;
P_BobWeapon(camera->player, &bobx, &boby, r_TicFracF);
// Interpolate the main weapon layer once so as to be able to add it to other layers.
if ((weapon = camera->player->FindPSprite(PSP_WEAPON)) != nullptr)
{
if (weapon->firstTic)
{
wx = weapon->x;
wy = weapon->y;
}
else
{
wx = weapon->oldx + (weapon->x - weapon->oldx) * r_TicFracF;
wy = weapon->oldy + (weapon->y - weapon->oldy) * r_TicFracF;
}
}
else
{
wx = 0;
wy = 0;
}
if (gl_fixedcolormap)
{
lightlevel=255;
cm.Clear();
fakesec = viewsector;
}
else
{
fakesec = gl_FakeFlat(viewsector, &fs, false);
// calculate light level for weapon sprites
lightlevel = gl_ClampLight(fakesec->lightlevel);
// calculate colormap for weapon sprites
if (viewsector->e->XFloor.ffloors.Size() && !glset.nocoloredspritelighting)
{
TArray<lightlist_t> & lightlist = viewsector->e->XFloor.lightlist;
for(i=0;i<lightlist.Size();i++)
{
double lightbottom;
if (i<lightlist.Size()-1)
{
lightbottom=lightlist[i+1].plane.ZatPoint(ViewPos);
}
else
{
lightbottom=viewsector->floorplane.ZatPoint(ViewPos);
}
if (lightbottom<player->viewz)
{
cm = lightlist[i].extra_colormap;
lightlevel = gl_ClampLight(*lightlist[i].p_lightlevel);
break;
}
}
}
else
{
cm=fakesec->ColorMap;
if (glset.nocoloredspritelighting) cm.ClearColor();
}
lightlevel = gl_CalcLightLevel(lightlevel, getExtraLight(), true);
if (glset.lightmode == 8)
{
// Korshun: the way based on max possible light level for sector like in software renderer.
float min_L = 36.0 / 31.0 - ((lightlevel / 255.0) * (63.0 / 31.0)); // Lightlevel in range 0-63
if (min_L < 0)
min_L = 0;
else if (min_L > 1.0)
min_L = 1.0;
lightlevel = (1.0 - min_L) * 255;
}
else
{
lightlevel = (2 * lightlevel + 255) / 3;
}
lightlevel = gl_CheckSpriteGlow(viewsector, lightlevel, playermo->Pos());
}
// Korshun: fullbright fog in opengl, render weapon sprites fullbright (but don't cancel out the light color!)
if (glset.brightfog && ((level.flags&LEVEL_HASFADETABLE) || cm.FadeColor != 0))
{
lightlevel = 255;
}
PalEntry ThingColor = (playermo->RenderStyle.Flags & STYLEF_ColorIsFixed) ? playermo->fillcolor : 0xffffff;
ThingColor.a = 255;
visstyle_t vis;
vis.RenderStyle=playermo->RenderStyle;
vis.Alpha=playermo->Alpha;
vis.colormap = NULL;
if (playermo->Inventory)
{
playermo->Inventory->AlterWeaponSprite(&vis);
if (vis.colormap >= SpecialColormaps[0].Colormap &&
vis.colormap < SpecialColormaps[SpecialColormaps.Size()].Colormap &&
gl_fixedcolormap == CM_DEFAULT)
{
// this only happens for Strife's inverted weapon sprite
vis.RenderStyle.Flags |= STYLEF_InvertSource;
}
}
// Set the render parameters
int OverrideShader = -1;
float trans = 0.f;
if (vis.RenderStyle.BlendOp >= STYLEOP_Fuzz && vis.RenderStyle.BlendOp <= STYLEOP_FuzzOrRevSub)
{
vis.RenderStyle.CheckFuzz();
if (vis.RenderStyle.BlendOp == STYLEOP_Fuzz)
{
if (gl_fuzztype != 0)
{
// Todo: implement shader selection here
vis.RenderStyle = LegacyRenderStyles[STYLE_Translucent];
OverrideShader = gl_fuzztype + 4;
trans = 0.99f; // trans may not be 1 here
}
else
{
vis.RenderStyle.BlendOp = STYLEOP_Shadow;
}
}
}
gl_SetRenderStyle(vis.RenderStyle, false, false);
if (vis.RenderStyle.Flags & STYLEF_TransSoulsAlpha)
{
trans = transsouls;
}
else if (vis.RenderStyle.Flags & STYLEF_Alpha1)
{
trans = 1.f;
}
else if (trans == 0.f)
{
trans = vis.Alpha;
}
// now draw the different layers of the weapon
gl_RenderState.EnableBrightmap(true);
gl_RenderState.SetObjectColor(ThingColor);
gl_RenderState.BlendFunc(GL_SRC_ALPHA, GL_ONE_MINUS_SRC_ALPHA);
gl_RenderState.AlphaFunc(GL_GEQUAL, gl_mask_sprite_threshold);
gl_RenderState.BlendEquation(GL_FUNC_ADD);
// hack alert! Rather than changing everything in the underlying lighting code let's just temporarily change
// light mode here to draw the weapon sprite.
int oldlightmode = glset.lightmode;
if (glset.lightmode == 8) glset.lightmode = 2;
for(DPSprite *psp = player->psprites; psp != nullptr && psp->GetID() < PSP_TARGETCENTER; psp = psp->GetNext())
{
if (psp->GetState() != nullptr)
{
FColormap cmc = cm;
int ll = lightlevel;
if (isBright(psp))
{
if (fakesec == viewsector || in_area != area_below)
{
cmc.LightColor.r=
cmc.LightColor.g=
cmc.LightColor.b=0xff;
}
else
{
// under water areas keep most of their color for fullbright objects
cmc.LightColor.r = (3 * cmc.LightColor.r + 0xff) / 4;
cmc.LightColor.g = (3*cmc.LightColor.g + 0xff)/4;
cmc.LightColor.b = (3*cmc.LightColor.b + 0xff)/4;
}
ll = 255;
}
// set the lighting parameters
if (vis.RenderStyle.BlendOp == STYLEOP_Shadow)
{
gl_RenderState.SetColor(0.2f, 0.2f, 0.2f, 0.33f, cmc.desaturation);
}
else
{
if (gl_lights && GLRenderer->mLightCount && !gl_fixedcolormap && gl_light_sprites)
{
gl_SetDynSpriteLight(playermo, NULL);
}
gl_SetColor(ll, 0, cmc, trans, true);
}
if (psp->firstTic)
{ // Can't interpolate the first tic.
psp->firstTic = false;
psp->oldx = psp->x;
psp->oldy = psp->y;
}
float sx = psp->oldx + (psp->x - psp->oldx) * r_TicFracF;
float sy = psp->oldy + (psp->y - psp->oldy) * r_TicFracF;
if (psp->Flags & PSPF_ADDBOB)
{
sx += bobx;
sy += boby;
}
if (psp->Flags & PSPF_ADDWEAPON && psp->GetID() != PSP_WEAPON)
{
sx += wx;
sy += wy;
}
DrawPSprite(player, psp, sx, sy, hudModelStep, OverrideShader, !!(vis.RenderStyle.Flags & STYLEF_RedIsAlpha));
}
}
gl_RenderState.SetObjectColor(0xffffffff);
gl_RenderState.SetDynLight(0, 0, 0);
gl_RenderState.EnableBrightmap(false);
glset.lightmode = oldlightmode;
}
//==========================================================================
//
//
//
//==========================================================================
void GLWall::DrawDecal(DBaseDecal *decal)
{
line_t * line=seg->linedef;
side_t * side=seg->sidedef;
int i;
float zpos;
int light;
int rel;
float a;
bool flipx, flipy;
DecalVertex dv[4];
FTextureID decalTile;
if (decal->RenderFlags & RF_INVISIBLE) return;
if (type==RENDERWALL_FFBLOCK && gltexture->isMasked()) return; // No decals on 3D floors with transparent textures.
//if (decal->sprite != 0xffff)
{
decalTile = decal->PicNum;
flipx = !!(decal->RenderFlags & RF_XFLIP);
flipy = !!(decal->RenderFlags & RF_YFLIP);
}
/*
else
{
decalTile = SpriteFrames[sprites[decal->sprite].spriteframes + decal->frame].lump[0];
flipx = SpriteFrames[sprites[decal->sprite].spriteframes + decal->frame].flip & 1;
}
*/
FTexture *texture = TexMan[decalTile];
if (texture == NULL) return;
FMaterial *tex;
tex = FMaterial::ValidateTexture(texture, true);
// the sectors are only used for their texture origin coordinates
// so we don't need the fake sectors for deep water etc.
// As this is a completely split wall fragment no further splits are
// necessary for the decal.
sector_t *frontsector;
// for 3d-floor segments use the model sector as reference
if ((decal->RenderFlags&RF_CLIPMASK)==RF_CLIPMID) frontsector=decal->Sector;
else frontsector=seg->frontsector;
switch (decal->RenderFlags & RF_RELMASK)
{
default:
// No valid decal can have this type. If one is encountered anyway
// it is in some way invalid so skip it.
return;
//zpos = decal->z;
//break;
case RF_RELUPPER:
if (type!=RENDERWALL_TOP) return;
if (line->flags & ML_DONTPEGTOP)
{
zpos = decal->Z + frontsector->GetPlaneTexZ(sector_t::ceiling);
}
else
{
zpos = decal->Z + seg->backsector->GetPlaneTexZ(sector_t::ceiling);
}
break;
case RF_RELLOWER:
if (type!=RENDERWALL_BOTTOM) return;
if (line->flags & ML_DONTPEGBOTTOM)
{
zpos = decal->Z + frontsector->GetPlaneTexZ(sector_t::ceiling);
}
else
{
zpos = decal->Z + seg->backsector->GetPlaneTexZ(sector_t::floor);
}
break;
case RF_RELMID:
if (type==RENDERWALL_TOP || type==RENDERWALL_BOTTOM) return;
if (line->flags & ML_DONTPEGBOTTOM)
{
zpos = decal->Z + frontsector->GetPlaneTexZ(sector_t::floor);
}
else
{
zpos = decal->Z + frontsector->GetPlaneTexZ(sector_t::ceiling);
}
}
if (decal->RenderFlags & RF_FULLBRIGHT)
{
light = 255;
rel = 0;
}
else
{
light = lightlevel;
rel = rellight + getExtraLight();
}
FColormap p = Colormap;
if (glset.nocoloredspritelighting)
{
p.Decolorize();
}
a = decal->Alpha;
// now clip the decal to the actual polygon
float decalwidth = tex->TextureWidth() * decal->ScaleX;
float decalheight= tex->TextureHeight() * decal->ScaleY;
float decallefto = tex->GetLeftOffset() * decal->ScaleX;
float decaltopo = tex->GetTopOffset() * decal->ScaleY;
float leftedge = glseg.fracleft * side->TexelLength;
float linelength = glseg.fracright * side->TexelLength - leftedge;
// texel index of the decal's left edge
float decalpixpos = (float)side->TexelLength * decal->LeftDistance - (flipx? decalwidth-decallefto : decallefto) - leftedge;
float left,right;
float lefttex,righttex;
// decal is off the left edge
if (decalpixpos < 0)
{
left = 0;
lefttex = -decalpixpos;
}
else
{
left = decalpixpos;
lefttex = 0;
}
// decal is off the right edge
if (decalpixpos + decalwidth > linelength)
{
right = linelength;
righttex = right - decalpixpos;
}
else
{
right = decalpixpos + decalwidth;
righttex = decalwidth;
}
if (right<=left) return; // nothing to draw
// one texture unit on the wall as vector
float vx=(glseg.x2-glseg.x1)/linelength;
float vy=(glseg.y2-glseg.y1)/linelength;
dv[1].x=dv[0].x=glseg.x1+vx*left;
dv[1].y=dv[0].y=glseg.y1+vy*left;
dv[3].x=dv[2].x=glseg.x1+vx*right;
dv[3].y=dv[2].y=glseg.y1+vy*right;
zpos+= (flipy? decalheight-decaltopo : decaltopo);
dv[1].z=dv[2].z = zpos;
dv[0].z=dv[3].z = dv[1].z - decalheight;
dv[1].v=dv[2].v = tex->GetVT();
dv[1].u=dv[0].u = tex->GetU(lefttex / decal->ScaleX);
dv[3].u=dv[2].u = tex->GetU(righttex / decal->ScaleX);
dv[0].v=dv[3].v = tex->GetVB();
// now clip to the top plane
float vzt=(ztop[1]-ztop[0])/linelength;
float topleft=this->ztop[0]+vzt*left;
float topright=this->ztop[0]+vzt*right;
// completely below the wall
if (topleft<dv[0].z && topright<dv[3].z)
return;
if (topleft<dv[1].z || topright<dv[2].z)
{
// decal has to be clipped at the top
// let texture clamping handle all extreme cases
dv[1].v=(dv[1].z-topleft)/(dv[1].z-dv[0].z)*dv[0].v;
dv[2].v=(dv[2].z-topright)/(dv[2].z-dv[3].z)*dv[3].v;
dv[1].z=topleft;
dv[2].z=topright;
}
// now clip to the bottom plane
float vzb=(zbottom[1]-zbottom[0])/linelength;
float bottomleft=this->zbottom[0]+vzb*left;
float bottomright=this->zbottom[0]+vzb*right;
// completely above the wall
if (bottomleft>dv[1].z && bottomright>dv[2].z)
return;
if (bottomleft>dv[0].z || bottomright>dv[3].z)
{
// decal has to be clipped at the bottom
// let texture clamping handle all extreme cases
dv[0].v=(dv[1].z-bottomleft)/(dv[1].z-dv[0].z)*(dv[0].v-dv[1].v) + dv[1].v;
dv[3].v=(dv[2].z-bottomright)/(dv[2].z-dv[3].z)*(dv[3].v-dv[2].v) + dv[2].v;
dv[0].z=bottomleft;
dv[3].z=bottomright;
}
if (flipx)
{
float ur = tex->GetUR();
for(i=0;i<4;i++) dv[i].u=ur-dv[i].u;
}
if (flipy)
{
float vb = tex->GetVB();
for(i=0;i<4;i++) dv[i].v=vb-dv[i].v;
}
// calculate dynamic light effect.
if (gl_lights && GLRenderer->mLightCount && !gl_fixedcolormap && gl_light_sprites)
{
// Note: This should be replaced with proper shader based lighting.
double x, y;
decal->GetXY(seg->sidedef, x, y);
gl_SetDynSpriteLight(NULL, x, y, zpos, sub);
}
// alpha color only has an effect when using an alpha texture.
if (decal->RenderStyle.Flags & STYLEF_RedIsAlpha)
{
gl_RenderState.SetObjectColor(decal->AlphaColor|0xff000000);
}
gl_SetRenderStyle(decal->RenderStyle, false, false);
gl_RenderState.SetMaterial(tex, CLAMP_XY, decal->Translation, 0, !!(decal->RenderStyle.Flags & STYLEF_RedIsAlpha));
// If srcalpha is one it looks better with a higher alpha threshold
if (decal->RenderStyle.SrcAlpha == STYLEALPHA_One) gl_RenderState.AlphaFunc(GL_GEQUAL, gl_mask_sprite_threshold);
else gl_RenderState.AlphaFunc(GL_GREATER, 0.f);
gl_SetColor(light, rel, p, a);
// for additively drawn decals we must temporarily set the fog color to black.
PalEntry fc = gl_RenderState.GetFogColor();
if (decal->RenderStyle.BlendOp == STYLEOP_Add && decal->RenderStyle.DestAlpha == STYLEALPHA_One)
{
gl_RenderState.SetFog(0,-1);
}
FQuadDrawer qd;
for (i = 0; i < 4; i++)
{
qd.Set(i, dv[i].x, dv[i].z, dv[i].y, dv[i].u, dv[i].v);
}
if (lightlist == NULL)
{
gl_RenderState.Apply();
qd.Render(GL_TRIANGLE_FAN);
}
else
{
for (unsigned k = 0; k < lightlist->Size(); k++)
{
secplane_t &lowplane = k == (*lightlist).Size() - 1 ? bottomplane : (*lightlist)[k + 1].plane;
float low1 = lowplane.ZatPoint(dv[1].x, dv[1].y);
float low2 = lowplane.ZatPoint(dv[2].x, dv[2].y);
if (low1 < dv[1].z || low2 < dv[2].z)
{
int thisll = (*lightlist)[k].caster != NULL ? gl_ClampLight(*(*lightlist)[k].p_lightlevel) : lightlevel;
FColormap thiscm;
thiscm.FadeColor = Colormap.FadeColor;
thiscm.CopyFrom3DLight(&(*lightlist)[k]);
gl_SetColor(thisll, rel, thiscm, a);
if (glset.nocoloredspritelighting) thiscm.Decolorize();
gl_SetFog(thisll, rel, &thiscm, RenderStyle == STYLE_Add);
gl_RenderState.SetSplitPlanes((*lightlist)[k].plane, lowplane);
gl_RenderState.Apply();
qd.Render(GL_TRIANGLE_FAN);
}
if (low1 <= dv[0].z && low2 <= dv[3].z) break;
}
}
rendered_decals++;
gl_RenderState.SetTextureMode(TM_MODULATE);
gl_RenderState.SetObjectColor(0xffffffff);
gl_RenderState.SetFog(fc,-1);
gl_RenderState.SetDynLight(0,0,0);
}