diff --git a/src/hardware/hw_main.c b/src/hardware/hw_main.c index 3dfc7cf7..41cccba2 100644 --- a/src/hardware/hw_main.c +++ b/src/hardware/hw_main.c @@ -39,7 +39,9 @@ #include "../st_stuff.h" #include "../i_system.h" #include "../m_cheat.h" - +#ifdef ESLOPE +#include "../p_slopes.h" +#endif #include "hw_md2.h" #define R_FAKEFLOORS @@ -535,16 +537,42 @@ static void HWR_RenderPlane(sector_t *sector, extrasubsector_t *xsub, fixed_t fi angle_t angle = 0; FSurfaceInfo Surf; fixed_t tempxsow, tempytow; +#ifdef ESLOPE + pslope_t *slope = NULL; +#endif static FOutVector *planeVerts = NULL; static UINT16 numAllocedPlaneVerts = 0; - (void)sector; + (void)sector; ///@TODO remove shitty unused variable // no convex poly were generated for this subsector if (!xsub->planepoly) return; +#ifdef ESLOPE + // Get the slope pointer to simplify future code + if (FOFsector) + { + if (FOFsector->f_slope && FOFsector->floorheight == fixedheight) + slope = FOFsector->f_slope; + else if (FOFsector->c_slope && FOFsector->ceilingheight == fixedheight) + slope = FOFsector->c_slope; + } + else + { + // Use fixedheight to determine whether to check floor or ceiling because I hate my life + if (gr_frontsector->f_slope && gr_frontsector->floorheight == fixedheight) + slope = gr_frontsector->f_slope; + else if (gr_frontsector->c_slope && gr_frontsector->ceilingheight == fixedheight) + slope = gr_frontsector->c_slope; + } + + // Set fixedheight to the slope's height from our viewpoint, if we have a slope + if (slope) + fixedheight = P_GetZAt(slope, viewx, viewy); +#endif + height = FIXED_TO_FLOAT(fixedheight); pv = xsub->planepoly->pts; @@ -610,7 +638,12 @@ static void HWR_RenderPlane(sector_t *sector, extrasubsector_t *xsub, fixed_t fi if (FOFsector != NULL) { +#ifdef ESLOPE + if ((slope && slope == FOFsector->f_slope) + || fixedheight == FOFsector->floorheight) // it's a floor +#else if (fixedheight == FOFsector->floorheight) // it's a floor +#endif { scrollx = FIXED_TO_FLOAT(FOFsector->floor_xoffs)/fflatsize; scrolly = FIXED_TO_FLOAT(FOFsector->floor_yoffs)/fflatsize; @@ -625,7 +658,12 @@ static void HWR_RenderPlane(sector_t *sector, extrasubsector_t *xsub, fixed_t fi } else if (gr_frontsector) { +#ifdef ESLOPE + if ((slope && slope == gr_frontsector->f_slope) + || fixedheight == gr_frontsector->floorheight) // it's a floor +#else if (fixedheight < dup_viewz) // it's a floor +#endif { scrollx = FIXED_TO_FLOAT(gr_frontsector->floor_xoffs)/fflatsize; scrolly = FIXED_TO_FLOAT(gr_frontsector->floor_yoffs)/fflatsize; @@ -680,6 +718,14 @@ static void HWR_RenderPlane(sector_t *sector, extrasubsector_t *xsub, fixed_t fi v3d->x = pv->x; v3d->y = height; v3d->z = pv->y; + +#ifdef ESLOPE + if (slope) + { + fixedheight = P_GetZAt(slope, FLOAT_TO_FIXED(pv->x), FLOAT_TO_FIXED(pv->y)); + v3d->y = FIXED_TO_FLOAT(fixedheight); + } +#endif } // only useful for flat coloured triangles @@ -697,6 +743,11 @@ static void HWR_RenderPlane(sector_t *sector, extrasubsector_t *xsub, fixed_t fi { sector_t *psector = gr_frontsector; +#ifdef ESLOPE + if (slope) + fixedheight = P_GetZAt(slope, psector->soundorg.x, psector->soundorg.y); +#endif + if (psector->ffloors) { ffloor_t *caster = psector->lightlist[R_GetPlaneLight(psector, fixedheight, false)].caster; @@ -1033,23 +1084,50 @@ static void HWR_SplitWall(sector_t *sector, wallVert3D *wallVerts, INT32 texnum, lightlist. This may also include leaving out parts of the wall that can't be seen */ GLTexture_t * glTex; + float realtop, realbot, top, bot; float pegt, pegb, pegmul; float height = 0.0f, bheight = 0.0f; + +#ifdef ESLOPE + float endrealtop, endrealbot, endtop, endbot; + float endpegt, endpegb, endpegmul; + float endheight = 0.0f, endbheight = 0.0f; + + fixed_t v1x = FLOAT_TO_FIXED(wallVerts[0].x); + fixed_t v1y = FLOAT_TO_FIXED(wallVerts[0].y); + fixed_t v2x = FLOAT_TO_FIXED(wallVerts[1].x); + fixed_t v2y = FLOAT_TO_FIXED(wallVerts[1].y); + // compiler complains when P_GetZAt is used in FLOAT_TO_FIXED directly + // use this as a temp var to store P_GetZAt's return value each time + fixed_t temp; +#endif + INT32 solid, i; lightlist_t * list = sector->lightlist; const UINT8 alpha = Surf->FlatColor.s.alpha; FUINT lightnum; extracolormap_t *colormap; - realtop = top = wallVerts[2].y; + realtop = top = wallVerts[3].y; realbot = bot = wallVerts[0].y; - pegt = wallVerts[2].t; + pegt = wallVerts[3].t; pegb = wallVerts[0].t; pegmul = (pegb - pegt) / (top - bot); +#ifdef ESLOPE + endrealtop = endtop = wallVerts[2].y; + endrealbot = endbot = wallVerts[1].y; + endpegt = wallVerts[2].t; + endpegb = wallVerts[1].t; + endpegmul = (endpegb - endpegt) / (endtop - endbot); +#endif + for (i = 1; i < sector->numlights; i++) { +#ifdef ESLOPE + if (endtop < endrealbot) +#endif if (top < realbot) return; @@ -1082,14 +1160,45 @@ static void HWR_SplitWall(sector_t *sector, wallVert3D *wallVerts, INT32 texnum, if (cutflag == FF_CUTSOLIDS) // These are regular walls sent in from StoreWallRange, they shouldn't be cut from this solid = false; +#ifdef ESLOPE + if (list[i].slope) + { + temp = P_GetZAt(list[i].slope, v1x, v1y); + height = FIXED_TO_FLOAT(temp); + temp = P_GetZAt(list[i].slope, v2x, v2y); + endheight = FIXED_TO_FLOAT(temp); + } + else + height = endheight = FIXED_TO_FLOAT(list[i].height); + if (solid) + { + if (*list[i].caster->b_slope) + { + temp = P_GetZAt(*list[i].caster->b_slope, v1x, v1y); + bheight = FIXED_TO_FLOAT(temp); + temp = P_GetZAt(*list[i].caster->b_slope, v2x, v2y); + endbheight = FIXED_TO_FLOAT(temp); + } + else + bheight = endbheight = FIXED_TO_FLOAT(*list[i].caster->bottomheight); + } +#else height = FIXED_TO_FLOAT(list[i].height); if (solid) bheight = FIXED_TO_FLOAT(*list[i].caster->bottomheight); +#endif +#ifdef ESLOPE + if (endheight >= endtop) +#endif if (height >= top) { if (solid && top > bheight) top = bheight; +#ifdef ESLOPE + if (solid && endtop > endbheight) + endtop = endbheight; +#endif continue; } @@ -1099,6 +1208,13 @@ static void HWR_SplitWall(sector_t *sector, wallVert3D *wallVerts, INT32 texnum, if (bot < realbot) bot = realbot; +#ifdef ESLOPE + endbot = endheight; + + if (endbot < endrealbot) + endbot = endrealbot; +#endif + // colormap test if (list[i-1].caster) { @@ -1113,13 +1229,25 @@ static void HWR_SplitWall(sector_t *sector, wallVert3D *wallVerts, INT32 texnum, Surf->FlatColor.s.alpha = alpha; +#ifdef ESLOPE + wallVerts[3].t = pegt + ((realtop - top) * pegmul); + wallVerts[2].t = endpegt + ((endrealtop - endtop) * endpegmul); + wallVerts[0].t = pegt + ((realtop - bot) * pegmul); + wallVerts[1].t = endpegt + ((endrealtop - endbot) * endpegmul); + // set top/bottom coords + wallVerts[3].y = top; + wallVerts[2].y = endtop; + wallVerts[0].y = bot; + wallVerts[1].y = endbot; +#else wallVerts[3].t = wallVerts[2].t = pegt + ((realtop - top) * pegmul); wallVerts[0].t = wallVerts[1].t = pegt + ((realtop - bot) * pegmul); // set top/bottom coords wallVerts[2].y = wallVerts[3].y = top; wallVerts[0].y = wallVerts[1].y = bot; +#endif glTex = HWR_GetTexture(texnum); if (cutflag & FF_TRANSLUCENT) @@ -1133,9 +1261,19 @@ static void HWR_SplitWall(sector_t *sector, wallVert3D *wallVerts, INT32 texnum, top = bheight; else top = height; +#ifdef ESLOPE + if (solid) + endtop = endbheight; + else + endtop = endheight; +#endif } bot = realbot; +#ifdef ESLOPE + endbot = endrealbot; + if (endtop <= endrealbot) +#endif if (top <= realbot) return; @@ -1151,12 +1289,25 @@ static void HWR_SplitWall(sector_t *sector, wallVert3D *wallVerts, INT32 texnum, } Surf->FlatColor.s.alpha = alpha; - wallVerts[3].t = wallVerts[2].t = pegt + ((realtop - top) * pegmul); - wallVerts[0].t = wallVerts[1].t = pegt + ((realtop - bot) * pegmul); +#ifdef ESLOPE + wallVerts[3].t = pegt + ((realtop - top) * pegmul); + wallVerts[2].t = endpegt + ((endrealtop - endtop) * endpegmul); + wallVerts[0].t = pegt + ((realtop - bot) * pegmul); + wallVerts[1].t = endpegt + ((endrealtop - endbot) * endpegmul); // set top/bottom coords - wallVerts[2].y = wallVerts[3].y = top; - wallVerts[0].y = wallVerts[1].y = bot; + wallVerts[3].y = top; + wallVerts[2].y = endtop; + wallVerts[0].y = bot; + wallVerts[1].y = endbot; +#else + wallVerts[3].t = wallVerts[2].t = pegt + ((realtop - top) * pegmul); + wallVerts[0].t = wallVerts[1].t = pegt + ((realtop - bot) * pegmul); + + // set top/bottom coords + wallVerts[2].y = wallVerts[3].y = top; + wallVerts[0].y = wallVerts[1].y = bot; +#endif glTex = HWR_GetTexture(texnum); if (cutflag & FF_TRANSLUCENT) @@ -1304,11 +1455,19 @@ static void HWR_StoreWallRange(double startfrac, double endfrac) fixed_t worldtop, worldbottom; fixed_t worldhigh = 0, worldlow = 0; +#ifdef ESLOPE + fixed_t worldtopslope, worldbottomslope; + fixed_t worldhighslope = 0, worldlowslope = 0; + fixed_t v1x, v1y, v2x, v2y; +#endif GLTexture_t *grTex = NULL; float cliplow = 0.0f, cliphigh = 0.0f; INT32 gr_midtexture; fixed_t h, l; // 3D sides and 2s middle textures +#ifdef ESLOPE + fixed_t hS, lS; +#endif FUINT lightnum = 0; // shut up compiler extracolormap_t *colormap; @@ -1320,22 +1479,56 @@ static void HWR_StoreWallRange(double startfrac, double endfrac) gr_sidedef = gr_curline->sidedef; gr_linedef = gr_curline->linedef; - if (gr_frontsector->heightsec != -1) - { - worldtop = sectors[gr_frontsector->heightsec].ceilingheight; - worldbottom = sectors[gr_frontsector->heightsec].floorheight; - } - else - { - worldtop = gr_frontsector->ceilingheight; - worldbottom = gr_frontsector->floorheight; - } - vs.x = ((polyvertex_t *)gr_curline->v1)->x; vs.y = ((polyvertex_t *)gr_curline->v1)->y; ve.x = ((polyvertex_t *)gr_curline->v2)->x; ve.y = ((polyvertex_t *)gr_curline->v2)->y; +#ifdef ESLOPE + v1x = FLOAT_TO_FIXED(vs.x); + v1y = FLOAT_TO_FIXED(vs.y); + v2x = FLOAT_TO_FIXED(ve.x); + v2y = FLOAT_TO_FIXED(ve.y); +#endif + + if (gr_frontsector->heightsec != -1) + { +#ifdef ESLOPE + worldtop = worldtopslope = sectors[gr_frontsector->heightsec].ceilingheight; + worldbottom = worldbottomslope = sectors[gr_frontsector->heightsec].floorheight; +#else + worldtop = sectors[gr_frontsector->heightsec].ceilingheight; + worldbottom = sectors[gr_frontsector->heightsec].floorheight; +#endif + } + else + { +#ifdef ESLOPE + if (gr_frontsector->c_slope) + { + worldtop = P_GetZAt(gr_frontsector->c_slope, v1x, v1y); + worldtopslope = P_GetZAt(gr_frontsector->c_slope, v2x, v2y); + } + else + { + worldtop = worldtopslope = gr_frontsector->ceilingheight; + } + + if (gr_frontsector->f_slope) + { + worldbottom = P_GetZAt(gr_frontsector->f_slope, v1x, v1y); + worldbottomslope = P_GetZAt(gr_frontsector->f_slope, v2x, v2y); + } + else + { + worldbottom = worldbottomslope = gr_frontsector->floorheight; + } +#else + worldtop = gr_frontsector->ceilingheight; + worldbottom = gr_frontsector->floorheight; +#endif + } + // remember vertices ordering // 3--2 // | /| @@ -1379,13 +1572,40 @@ static void HWR_StoreWallRange(double startfrac, double endfrac) // two sided line if (gr_backsector->heightsec != -1) { +#ifdef ESLOPE + worldhigh = worldhighslope = sectors[gr_backsector->heightsec].ceilingheight; + worldlow = worldlowslope = sectors[gr_backsector->heightsec].floorheight; +#else worldhigh = sectors[gr_backsector->heightsec].ceilingheight; worldlow = sectors[gr_backsector->heightsec].floorheight; +#endif } else { +#ifdef ESLOPE + if (gr_backsector->c_slope) + { + worldhigh = P_GetZAt(gr_backsector->c_slope, v1x, v1y); + worldhighslope = P_GetZAt(gr_backsector->c_slope, v2x, v2y); + } + else + { + worldhigh = worldhighslope = gr_backsector->ceilingheight; + } + + if (gr_backsector->f_slope) + { + worldlow = P_GetZAt(gr_backsector->f_slope, v1x, v1y); + worldlowslope = P_GetZAt(gr_backsector->f_slope, v2x, v2y); + } + else + { + worldlow = worldlowslope = gr_backsector->floorheight; + } +#else worldhigh = gr_backsector->ceilingheight; worldlow = gr_backsector->floorheight; +#endif } // hack to allow height changes in outdoor areas @@ -1394,10 +1614,18 @@ static void HWR_StoreWallRange(double startfrac, double endfrac) gr_backsector->ceilingpic == skyflatnum) { worldtop = worldhigh; +#ifdef ESLOPE + worldtopslope = worldhighslope; +#endif } // check TOP TEXTURE - if (worldhigh < worldtop && texturetranslation[gr_sidedef->toptexture]) + if (( +#ifdef ESLOPE + worldhighslope < worldtopslope || +#endif + worldhigh < worldtop + ) && texturetranslation[gr_sidedef->toptexture]) { if (drawtextured) { @@ -1408,8 +1636,15 @@ static void HWR_StoreWallRange(double startfrac, double endfrac) // PEGGING if (gr_linedef->flags & ML_DONTPEGTOP) texturevpegtop = 0; - else +#ifdef ESLOPE + else if (gr_linedef->flags & ML_EFFECT1) texturevpegtop = worldhigh + textureheight[gr_sidedef->toptexture] - worldtop; + else + texturevpegtop = gr_backsector->ceilingheight + textureheight[gr_sidedef->toptexture] - gr_frontsector->ceilingheight; +#else + else + texturevpegtop = worldhigh + textureheight[gr_sidedef->toptexture] - worldtop; +#endif texturevpegtop += gr_sidedef->rowoffset; @@ -1417,14 +1652,46 @@ static void HWR_StoreWallRange(double startfrac, double endfrac) texturevpegtop %= SHORT(textures[texturetranslation[gr_sidedef->toptexture]]->height)<scaleY; - wallVerts[0].t = wallVerts[1].t = (texturevpegtop + worldtop - worldhigh) * grTex->scaleY; + wallVerts[0].t = wallVerts[1].t = (texturevpegtop + gr_frontsector->ceilingheight - gr_backsector->ceilingheight) * grTex->scaleY; wallVerts[0].s = wallVerts[3].s = cliplow * grTex->scaleX; wallVerts[2].s = wallVerts[1].s = cliphigh * grTex->scaleX; + +#ifdef ESLOPE + // Adjust t value for sloped walls + if (!(gr_linedef->flags & ML_EFFECT1)) + { + // Unskewed + wallVerts[3].t -= (worldtop - gr_frontsector->ceilingheight) * grTex->scaleY; + wallVerts[2].t -= (worldtopslope - gr_frontsector->ceilingheight) * grTex->scaleY; + wallVerts[0].t -= (worldhigh - gr_backsector->ceilingheight) * grTex->scaleY; + wallVerts[1].t -= (worldhighslope - gr_backsector->ceilingheight) * grTex->scaleY; + } + else if (gr_linedef->flags & ML_DONTPEGTOP) + { + // Skewed by top + wallVerts[0].t = (texturevpegtop + worldtop - worldhigh) * grTex->scaleY; + wallVerts[1].t = (texturevpegtop + worldtopslope - worldhighslope) * grTex->scaleY; + } + else + { + // Skewed by bottom + wallVerts[0].t = (texturevpegtop + worldhigh - worldtop) * grTex->scaleY; + wallVerts[2].t = wallVerts[3].t - (worldhighslope - worldhigh) * grTex->scaleY; + wallVerts[1].t = wallVerts[2].t - (worldhighslope - worldtopslope) * grTex->scaleY; + } +#endif } // set top/bottom coords +#ifdef ESLOPE + wallVerts[3].y = FIXED_TO_FLOAT(worldtop); + wallVerts[0].y = FIXED_TO_FLOAT(worldhigh); + wallVerts[2].y = FIXED_TO_FLOAT(worldtopslope); + wallVerts[1].y = FIXED_TO_FLOAT(worldhighslope); +#else wallVerts[2].y = wallVerts[3].y = FIXED_TO_FLOAT(worldtop); wallVerts[0].y = wallVerts[1].y = FIXED_TO_FLOAT(worldhigh); +#endif if (gr_frontsector->numlights) HWR_SplitWall(gr_frontsector, wallVerts, texturetranslation[gr_sidedef->toptexture], &Surf, FF_CUTSOLIDS); @@ -1435,7 +1702,11 @@ static void HWR_StoreWallRange(double startfrac, double endfrac) } // check BOTTOM TEXTURE - if (worldlow > worldbottom && texturetranslation[gr_sidedef->bottomtexture]) //only if VISIBLE!!! + if (( +#ifdef ESLOPE + worldlowslope > worldbottomslope || +#endif + worldlow > worldbottom) && texturetranslation[gr_sidedef->bottomtexture]) //only if VISIBLE!!! { if (drawtextured) { @@ -1444,10 +1715,19 @@ static void HWR_StoreWallRange(double startfrac, double endfrac) grTex = HWR_GetTexture(texturetranslation[gr_sidedef->bottomtexture]); // PEGGING - if (gr_linedef->flags & ML_DONTPEGBOTTOM) +#ifdef ESLOPE + if (!(gr_linedef->flags & ML_DONTPEGBOTTOM)) + texturevpegbottom = 0; + else if (gr_linedef->flags & ML_EFFECT1) texturevpegbottom = worldtop - worldlow; else - texturevpegbottom = 0; + texturevpegbottom = gr_frontsector->ceilingheight - gr_backsector->floorheight; +#else + if (gr_linedef->flags & ML_DONTPEGBOTTOM) + texturevpegbottom = worldtop - worldlow; + else + texturevpegbottom = 0; +#endif texturevpegbottom += gr_sidedef->rowoffset; @@ -1455,14 +1735,46 @@ static void HWR_StoreWallRange(double startfrac, double endfrac) texturevpegbottom %= SHORT(textures[texturetranslation[gr_sidedef->bottomtexture]]->height)<scaleY; - wallVerts[0].t = wallVerts[1].t = (texturevpegbottom + worldlow - worldbottom) * grTex->scaleY; + wallVerts[0].t = wallVerts[1].t = (texturevpegbottom + gr_backsector->floorheight - gr_frontsector->floorheight) * grTex->scaleY; wallVerts[0].s = wallVerts[3].s = cliplow * grTex->scaleX; wallVerts[2].s = wallVerts[1].s = cliphigh * grTex->scaleX; + +#ifdef ESLOPE + // Adjust t value for sloped walls + if (!(gr_linedef->flags & ML_EFFECT1)) + { + // Unskewed + wallVerts[0].t -= (worldbottom - gr_frontsector->floorheight) * grTex->scaleY; + wallVerts[1].t -= (worldbottomslope - gr_frontsector->floorheight) * grTex->scaleY; + wallVerts[3].t -= (worldlow - gr_backsector->floorheight) * grTex->scaleY; + wallVerts[2].t -= (worldlowslope - gr_backsector->floorheight) * grTex->scaleY; + } + else if (gr_linedef->flags & ML_DONTPEGBOTTOM) + { + // Skewed by bottom + wallVerts[0].t = (texturevpegbottom + worldlow - worldbottom) * grTex->scaleY; + wallVerts[2].t = wallVerts[3].t - (worldlowslope - worldlow) * grTex->scaleY; + wallVerts[1].t = wallVerts[2].t - (worldbottomslope - worldlowslope) * grTex->scaleY; + } + else + { + // Skewed by top + wallVerts[0].t = (texturevpegbottom + worldlow - worldbottom) * grTex->scaleY; + wallVerts[1].t = (texturevpegbottom + worldlowslope - worldbottomslope) * grTex->scaleY; + } +#endif } // set top/bottom coords +#ifdef ESLOPE + wallVerts[3].y = FIXED_TO_FLOAT(worldlow); + wallVerts[0].y = FIXED_TO_FLOAT(worldbottom); + wallVerts[2].y = FIXED_TO_FLOAT(worldlowslope); + wallVerts[1].y = FIXED_TO_FLOAT(worldbottomslope); +#else wallVerts[2].y = wallVerts[3].y = FIXED_TO_FLOAT(worldlow); wallVerts[0].y = wallVerts[1].y = FIXED_TO_FLOAT(worldbottom); +#endif if (gr_frontsector->numlights) HWR_SplitWall(gr_frontsector, wallVerts, texturetranslation[gr_sidedef->bottomtexture], &Surf, FF_CUTSOLIDS); @@ -1529,14 +1841,36 @@ static void HWR_StoreWallRange(double startfrac, double endfrac) popentop = back->ceilingheight; popenbottom = back->floorheight; } -#endif else - { - popentop = front->ceilingheight < back->ceilingheight ? front->ceilingheight : back->ceilingheight; - popenbottom = front->floorheight > back->floorheight ? front->floorheight : back->floorheight; +#endif + { +#ifdef ESLOPE + popentop = min(worldtop, worldhigh); + popenbottom = max(worldbottom, worldlow); +#else + popentop = min(front->ceilingheight, back->ceilingheight); + popenbottom = max(front->floorheight, back->floorheight); +#endif } - if (gr_linedef->flags & ML_DONTPEGBOTTOM) +#ifdef ESLOPE + if (gr_linedef->flags & ML_EFFECT2) + { + if (!!(gr_linedef->flags & ML_DONTPEGBOTTOM) ^ !!(gr_linedef->flags & ML_EFFECT3)) + { + polybottom = max(front->floorheight, back->floorheight) + gr_sidedef->rowoffset; + polytop = polybottom + textureheight[gr_midtexture]*repeats; + } + else + { + polytop = min(front->ceilingheight, back->ceilingheight) + gr_sidedef->rowoffset; + polybottom = polytop - textureheight[gr_midtexture]*repeats; + } + } + else if (!!(gr_linedef->flags & ML_DONTPEGBOTTOM) ^ !!(gr_linedef->flags & ML_EFFECT3)) +#else + if (gr_linedef->flags & ML_DONTPEGBOTTOM) +#endif { polybottom = popenbottom + gr_sidedef->rowoffset; polytop = polybottom + textureheight[gr_midtexture]*repeats; @@ -1559,17 +1893,21 @@ static void HWR_StoreWallRange(double startfrac, double endfrac) else { // The cut-off values of a linedef can always be constant, since every line has an absoulute front and or back sector - lowcut = front->floorheight > back->floorheight ? front->floorheight : back->floorheight; - highcut = front->ceilingheight < back->ceilingheight ? front->ceilingheight : back->ceilingheight; + lowcut = popenbottom; + highcut = popentop; } - h = polytop > highcut ? highcut : polytop; - l = polybottom < lowcut ? lowcut : polybottom; + h = min(highcut, polytop); + l = max(polybottom, lowcut); if (drawtextured) { // PEGGING +#ifdef ESLOPE + if (!!(gr_linedef->flags & ML_DONTPEGBOTTOM) ^ !!(gr_linedef->flags & ML_EFFECT3)) +#else if (gr_linedef->flags & ML_DONTPEGBOTTOM) +#endif texturevpeg = textureheight[gr_sidedef->midtexture]*repeats - h + polybottom; else texturevpeg = polytop - h; @@ -1588,6 +1926,52 @@ static void HWR_StoreWallRange(double startfrac, double endfrac) wallVerts[2].y = wallVerts[3].y = FIXED_TO_FLOAT(h); wallVerts[0].y = wallVerts[1].y = FIXED_TO_FLOAT(l); +#ifdef ESLOPE + // Correct to account for slopes + { + fixed_t midtextureslant; + + if (gr_linedef->flags & ML_EFFECT2) + midtextureslant = 0; + else if (!!(gr_linedef->flags & ML_DONTPEGBOTTOM) ^ !!(gr_linedef->flags & ML_EFFECT3)) + midtextureslant = worldlow < worldbottom + ? worldbottomslope-worldbottom + : worldlowslope-worldlow; + else + midtextureslant = worldtop < worldhigh + ? worldtopslope-worldtop + : worldhighslope-worldhigh; + + polytop += midtextureslant; + polybottom += midtextureslant; + + highcut += worldtop < worldhigh + ? worldtopslope-worldtop + : worldhighslope-worldhigh; + lowcut += worldlow < worldbottom + ? worldbottomslope-worldbottom + : worldlowslope-worldlow; + + // Texture stuff + h = min(highcut, polytop); + l = max(polybottom, lowcut); + + if (drawtextured) + { + // PEGGING + if (!!(gr_linedef->flags & ML_DONTPEGBOTTOM) ^ !!(gr_linedef->flags & ML_EFFECT3)) + texturevpeg = textureheight[gr_sidedef->midtexture]*repeats - h + polybottom; + else + texturevpeg = polytop - h; + wallVerts[2].t = texturevpeg * grTex->scaleY; + wallVerts[1].t = (h - l + texturevpeg) * grTex->scaleY; + } + + wallVerts[2].y = FIXED_TO_FLOAT(h); + wallVerts[1].y = FIXED_TO_FLOAT(l); + } +#endif + // set alpha for transparent walls (new boom and legacy linedef types) // ooops ! this do not work at all because render order we should render it in backtofront order switch (gr_linedef->special) @@ -1768,6 +2152,11 @@ static void HWR_StoreWallRange(double startfrac, double endfrac) { fixed_t texturevpeg; // PEGGING +#ifdef ESLOPE + if ((gr_linedef->flags & (ML_DONTPEGBOTTOM|ML_EFFECT2)) == (ML_DONTPEGBOTTOM|ML_EFFECT2)) + texturevpeg = gr_frontsector->floorheight + textureheight[gr_sidedef->midtexture] - gr_frontsector->ceilingheight + gr_sidedef->rowoffset; + else +#endif if (gr_linedef->flags & ML_DONTPEGBOTTOM) texturevpeg = worldbottom + textureheight[gr_sidedef->midtexture] - worldtop + gr_sidedef->rowoffset; else @@ -1777,14 +2166,37 @@ static void HWR_StoreWallRange(double startfrac, double endfrac) grTex = HWR_GetTexture(gr_midtexture); wallVerts[3].t = wallVerts[2].t = texturevpeg * grTex->scaleY; - wallVerts[0].t = wallVerts[1].t = (texturevpeg + worldtop - worldbottom) * grTex->scaleY; + wallVerts[0].t = wallVerts[1].t = (texturevpeg + gr_frontsector->ceilingheight - gr_frontsector->floorheight) * grTex->scaleY; wallVerts[0].s = wallVerts[3].s = cliplow * grTex->scaleX; wallVerts[2].s = wallVerts[1].s = cliphigh * grTex->scaleX; + +#ifdef ESLOPE + // Texture correction for slopes + if (gr_linedef->flags & ML_EFFECT2) { + wallVerts[3].t += (gr_frontsector->ceilingheight - worldtop) * grTex->scaleY; + wallVerts[2].t += (gr_frontsector->ceilingheight - worldtopslope) * grTex->scaleY; + wallVerts[0].t += (gr_frontsector->floorheight - worldbottom) * grTex->scaleY; + wallVerts[1].t += (gr_frontsector->floorheight - worldbottomslope) * grTex->scaleY; + } else if (gr_linedef->flags & ML_DONTPEGBOTTOM) { + wallVerts[3].t = wallVerts[0].t + (worldbottom-worldtop) * grTex->scaleY; + wallVerts[2].t = wallVerts[1].t + (worldbottomslope-worldtopslope) * grTex->scaleY; + } else { + wallVerts[0].t = wallVerts[3].t - (worldbottom-worldtop) * grTex->scaleY; + wallVerts[1].t = wallVerts[2].t - (worldbottomslope-worldtopslope) * grTex->scaleY; + } +#endif } +#ifdef ESLOPE + //Set textures properly on single sided walls that are sloped + wallVerts[3].y = FIXED_TO_FLOAT(worldtop); + wallVerts[0].y = FIXED_TO_FLOAT(worldbottom); + wallVerts[2].y = FIXED_TO_FLOAT(worldtopslope); + wallVerts[1].y = FIXED_TO_FLOAT(worldbottomslope); +#else // set top/bottom coords wallVerts[2].y = wallVerts[3].y = FIXED_TO_FLOAT(worldtop); wallVerts[0].y = wallVerts[1].y = FIXED_TO_FLOAT(worldbottom); - +#endif // I don't think that solid walls can use translucent linedef types... if (gr_frontsector->numlights) HWR_SplitWall(gr_frontsector, wallVerts, gr_midtexture, &Surf, FF_CUTSOLIDS); @@ -1817,6 +2229,8 @@ static void HWR_StoreWallRange(double startfrac, double endfrac) INT32 texnum; line_t * newline = NULL; // Multi-Property FOF + ///TODO add slope support (fixing cutoffs, proper wall clipping) - maybe just disable highcut/lowcut if either sector or FOF has a slope + /// to allow fun plane intersecting in OGL? But then people would abuse that and make software look bad. :C highcut = gr_frontsector->ceilingheight < gr_backsector->ceilingheight ? gr_frontsector->ceilingheight : gr_backsector->ceilingheight; lowcut = gr_frontsector->floorheight > gr_backsector->floorheight ? gr_frontsector->floorheight : gr_backsector->floorheight; @@ -1838,6 +2252,24 @@ static void HWR_StoreWallRange(double startfrac, double endfrac) texnum = texturetranslation[sides[newline->sidenum[0]].midtexture]; } +#ifdef ESLOPE + h = *rover->t_slope ? P_GetZAt(*rover->t_slope, v1x, v1y) : *rover->topheight; + hS = *rover->t_slope ? P_GetZAt(*rover->t_slope, v2x, v2y) : *rover->topheight; + l = *rover->b_slope ? P_GetZAt(*rover->b_slope, v1x, v1y) : *rover->bottomheight; + lS = *rover->b_slope ? P_GetZAt(*rover->b_slope, v2x, v2y) : *rover->bottomheight; + if (!(*rover->t_slope) && !gr_frontsector->c_slope && !gr_backsector->c_slope && h > highcut) + h = hS = highcut; + if (!(*rover->b_slope) && !gr_frontsector->f_slope && !gr_backsector->f_slope && l < lowcut) + l = lS = lowcut; + //Hurdler: HW code starts here + //FIXME: check if peging is correct + // set top/bottom coords + + wallVerts[3].y = FIXED_TO_FLOAT(h); + wallVerts[2].y = FIXED_TO_FLOAT(hS); + wallVerts[0].y = FIXED_TO_FLOAT(l); + wallVerts[1].y = FIXED_TO_FLOAT(lS); +#else h = *rover->topheight; l = *rover->bottomheight; if (h > highcut) @@ -1849,6 +2281,7 @@ static void HWR_StoreWallRange(double startfrac, double endfrac) // set top/bottom coords wallVerts[2].y = wallVerts[3].y = FIXED_TO_FLOAT(h); wallVerts[0].y = wallVerts[1].y = FIXED_TO_FLOAT(l); +#endif if (rover->flags & FF_FOG) { wallVerts[3].t = wallVerts[2].t = 0; @@ -1858,6 +2291,15 @@ static void HWR_StoreWallRange(double startfrac, double endfrac) } else if (drawtextured) { +#ifdef ESLOPE // P.S. this is better-organized than the old version + fixed_t offs = sides[(newline ?: rover->master)->sidenum[0]].rowoffset; + grTex = HWR_GetTexture(texnum); + + wallVerts[3].t = (*rover->topheight - h + offs) * grTex->scaleY; + wallVerts[2].t = (*rover->topheight - hS + offs) * grTex->scaleY; + wallVerts[0].t = (*rover->topheight - l + offs) * grTex->scaleY; + wallVerts[1].t = (*rover->topheight - lS + offs) * grTex->scaleY; +#else grTex = HWR_GetTexture(texnum); if (newline) @@ -1870,6 +2312,7 @@ static void HWR_StoreWallRange(double startfrac, double endfrac) wallVerts[3].t = wallVerts[2].t = (*rover->topheight - h + sides[rover->master->sidenum[0]].rowoffset) * grTex->scaleY; wallVerts[0].t = wallVerts[1].t = (h - l + (*rover->topheight - h + sides[rover->master->sidenum[0]].rowoffset)) * grTex->scaleY; } +#endif wallVerts[0].s = wallVerts[3].s = cliplow * grTex->scaleX; wallVerts[2].s = wallVerts[1].s = cliphigh * grTex->scaleX; @@ -1942,7 +2385,24 @@ static void HWR_StoreWallRange(double startfrac, double endfrac) newline = rover->master->frontsector->lines[0] + linenum; texnum = texturetranslation[sides[newline->sidenum[0]].midtexture]; } +#ifdef ESLOPE //backsides + h = *rover->t_slope ? P_GetZAt(*rover->t_slope, v1x, v1y) : *rover->topheight; + hS = *rover->t_slope ? P_GetZAt(*rover->t_slope, v2x, v2y) : *rover->topheight; + l = *rover->b_slope ? P_GetZAt(*rover->b_slope, v1x, v1y) : *rover->bottomheight; + lS = *rover->b_slope ? P_GetZAt(*rover->b_slope, v2x, v2y) : *rover->bottomheight; + if (!(*rover->t_slope) && !gr_frontsector->c_slope && !gr_backsector->c_slope && h > highcut) + h = hS = highcut; + if (!(*rover->b_slope) && !gr_frontsector->f_slope && !gr_backsector->f_slope && l < lowcut) + l = lS = lowcut; + //Hurdler: HW code starts here + //FIXME: check if peging is correct + // set top/bottom coords + wallVerts[3].y = FIXED_TO_FLOAT(h); + wallVerts[2].y = FIXED_TO_FLOAT(hS); + wallVerts[0].y = FIXED_TO_FLOAT(l); + wallVerts[1].y = FIXED_TO_FLOAT(lS); +#else h = *rover->topheight; l = *rover->bottomheight; if (h > highcut) @@ -1954,7 +2414,7 @@ static void HWR_StoreWallRange(double startfrac, double endfrac) // set top/bottom coords wallVerts[2].y = wallVerts[3].y = FIXED_TO_FLOAT(h); wallVerts[0].y = wallVerts[1].y = FIXED_TO_FLOAT(l); - +#endif if (rover->flags & FF_FOG) { wallVerts[3].t = wallVerts[2].t = 0; @@ -2448,13 +2908,17 @@ static void HWR_AddLine(seg_t * line) // and no middle texture. if ( #ifdef POLYOBJECTS - !line->polyseg + !line->polyseg && +#endif + gr_backsector->ceilingpic == gr_frontsector->ceilingpic + && gr_backsector->floorpic == gr_frontsector->floorpic +#ifdef ESLOPE + && gr_backsector->f_slope == gr_frontsector->f_slope + && gr_backsector->c_slope == gr_frontsector->c_slope #endif - && gr_backsector->ceilingpic == gr_frontsector->ceilingpic - && gr_backsector->floorpic == gr_frontsector->floorpic && gr_backsector->lightlevel == gr_frontsector->lightlevel - && gr_curline->sidedef->midtexture == 0 - && !gr_backsector->ffloors && !gr_frontsector->ffloors) + && gr_curline->sidedef->midtexture == 0 + && !gr_backsector->ffloors && !gr_frontsector->ffloors) // SoM: For 3D sides... Boris, would you like to take a // crack at rendering 3D sides? You would need to add the // above check and add code to HWR_StoreWallRange... @@ -2848,6 +3312,7 @@ static void HWR_Subsector(size_t num) INT32 floorlightlevel; INT32 ceilinglightlevel; INT32 locFloorHeight, locCeilingHeight; + INT32 cullFloorHeight, cullCeilingHeight; INT32 light = 0; extracolormap_t *floorcolormap; extracolormap_t *ceilingcolormap; @@ -2904,26 +3369,41 @@ static void HWR_Subsector(size_t num) // ----- for special tricks with HW renderer ----- if (gr_frontsector->pseudoSector) { - locFloorHeight = gr_frontsector->virtualFloorheight; - locCeilingHeight = gr_frontsector->virtualCeilingheight; + cullFloorHeight = locFloorHeight = gr_frontsector->virtualFloorheight; + cullCeilingHeight = locCeilingHeight = gr_frontsector->virtualCeilingheight; } else if (gr_frontsector->virtualFloor) { - locFloorHeight = gr_frontsector->virtualFloorheight; + ///@TODO Is this whole virtualFloor mess even useful? I don't think it even triggers ever. + cullFloorHeight = locFloorHeight = gr_frontsector->virtualFloorheight; if (gr_frontsector->virtualCeiling) - locCeilingHeight = gr_frontsector->virtualCeilingheight; + cullCeilingHeight = locCeilingHeight = gr_frontsector->virtualCeilingheight; else - locCeilingHeight = gr_frontsector->ceilingheight; + cullCeilingHeight = locCeilingHeight = gr_frontsector->ceilingheight; } else if (gr_frontsector->virtualCeiling) { - locCeilingHeight = gr_frontsector->virtualCeilingheight; - locFloorHeight = gr_frontsector->floorheight; + cullCeilingHeight = locCeilingHeight = gr_frontsector->virtualCeilingheight; + cullFloorHeight = locFloorHeight = gr_frontsector->floorheight; } else { - locFloorHeight = gr_frontsector->floorheight; - locCeilingHeight = gr_frontsector->ceilingheight; + cullFloorHeight = locFloorHeight = gr_frontsector->floorheight; + cullCeilingHeight = locCeilingHeight = gr_frontsector->ceilingheight; + +#ifdef ESLOPE + if (gr_frontsector->f_slope) + { + cullFloorHeight = P_GetZAt(gr_frontsector->f_slope, viewx, viewy); + locFloorHeight = P_GetZAt(gr_frontsector->f_slope, gr_frontsector->soundorg.x, gr_frontsector->soundorg.y); + } + + if (gr_frontsector->c_slope) + { + cullCeilingHeight = P_GetZAt(gr_frontsector->c_slope, viewx, viewy); + locCeilingHeight = P_GetZAt(gr_frontsector->c_slope, gr_frontsector->soundorg.x, gr_frontsector->soundorg.y); + } +#endif } // ----- end special tricks ----- @@ -2954,14 +3434,18 @@ static void HWR_Subsector(size_t num) // render floor ? #ifdef DOPLANES // yeah, easy backface cull! :) - if (locFloorHeight < dup_viewz) + if (cullFloorHeight < dup_viewz) { if (gr_frontsector->floorpic != skyflatnum) { if (sub->validcount != validcount) { HWR_GetFlat(levelflats[gr_frontsector->floorpic].lumpnum); - HWR_RenderPlane(gr_frontsector, &extrasubsectors[num], locFloorHeight, PF_Occlude, floorlightlevel, levelflats[gr_frontsector->floorpic].lumpnum, NULL, 255, false, floorcolormap); + HWR_RenderPlane(gr_frontsector, &extrasubsectors[num], + // Hack to make things continue to work around slopes. + locFloorHeight == cullFloorHeight ? locFloorHeight : gr_frontsector->floorheight, + // We now return you to your regularly scheduled rendering. + PF_Occlude, floorlightlevel, levelflats[gr_frontsector->floorpic].lumpnum, NULL, 255, false, floorcolormap); } } else @@ -2972,14 +3456,18 @@ static void HWR_Subsector(size_t num) } } - if (locCeilingHeight > dup_viewz) + if (cullCeilingHeight > dup_viewz) { if (gr_frontsector->ceilingpic != skyflatnum) { if (sub->validcount != validcount) { HWR_GetFlat(levelflats[gr_frontsector->ceilingpic].lumpnum); - HWR_RenderPlane(NULL, &extrasubsectors[num], locCeilingHeight, PF_Occlude, ceilinglightlevel, levelflats[gr_frontsector->ceilingpic].lumpnum,NULL, 255, false, ceilingcolormap); + HWR_RenderPlane(NULL, &extrasubsectors[num], + // Hack to make things continue to work around slopes. + locCeilingHeight == cullCeilingHeight ? locCeilingHeight : gr_frontsector->ceilingheight, + // We now return you to your regularly scheduled rendering. + PF_Occlude, ceilinglightlevel, levelflats[gr_frontsector->ceilingpic].lumpnum,NULL, 255, false, ceilingcolormap); } } else @@ -3008,22 +3496,34 @@ static void HWR_Subsector(size_t num) for (rover = gr_frontsector->ffloors; rover; rover = rover->next) { + fixed_t cullHeight, centerHeight; + + // bottom plane +#ifdef ESLOPE + if (*rover->b_slope) + { + cullHeight = P_GetZAt(*rover->b_slope, viewx, viewy); + centerHeight = P_GetZAt(*rover->b_slope, gr_frontsector->soundorg.x, gr_frontsector->soundorg.y); + } + else +#endif + cullHeight = centerHeight = *rover->bottomheight; if (!(rover->flags & FF_EXISTS) || !(rover->flags & FF_RENDERPLANES)) continue; if (sub->validcount == validcount) continue; - if (*rover->bottomheight <= gr_frontsector->ceilingheight && - *rover->bottomheight >= gr_frontsector->floorheight && - ((dup_viewz < *rover->bottomheight && !(rover->flags & FF_INVERTPLANES)) || - (dup_viewz > *rover->bottomheight && (rover->flags & FF_BOTHPLANES || rover->flags & FF_INVERTPLANES)))) + if (centerHeight <= locCeilingHeight && + centerHeight >= locFloorHeight && + ((dup_viewz < cullHeight && !(rover->flags & FF_INVERTPLANES)) || + (dup_viewz > cullHeight && (rover->flags & FF_BOTHPLANES || rover->flags & FF_INVERTPLANES)))) { if (rover->flags & FF_FOG) { UINT8 alpha; - light = R_GetPlaneLight(gr_frontsector, *rover->bottomheight, dup_viewz < *rover->bottomheight ? true : false); + light = R_GetPlaneLight(gr_frontsector, centerHeight, dup_viewz < cullHeight ? true : false); if (rover->master->frontsector->extra_colormap) alpha = HWR_FogBlockAlpha(*gr_frontsector->lightlist[light].lightlevel, rover->master->frontsector->extra_colormap->rgba, rover->master->frontsector->extra_colormap->fadergba); @@ -3039,7 +3539,7 @@ static void HWR_Subsector(size_t num) } else if (rover->flags & FF_TRANSLUCENT) // SoM: Flags are more efficient { - light = R_GetPlaneLight(gr_frontsector, *rover->bottomheight, dup_viewz < *rover->bottomheight ? true : false); + light = R_GetPlaneLight(gr_frontsector, centerHeight, dup_viewz < cullHeight ? true : false); #ifndef SORTING HWR_Add3DWater(levelflats[*rover->bottompic].lumpnum, &extrasubsectors[num], @@ -3058,21 +3558,33 @@ static void HWR_Subsector(size_t num) else { HWR_GetFlat(levelflats[*rover->bottompic].lumpnum); - light = R_GetPlaneLight(gr_frontsector, *rover->bottomheight, dup_viewz < *rover->bottomheight ? true : false); + light = R_GetPlaneLight(gr_frontsector, centerHeight, dup_viewz < cullHeight ? true : false); HWR_RenderPlane(NULL, &extrasubsectors[num], *rover->bottomheight, PF_Occlude, *gr_frontsector->lightlist[light].lightlevel, levelflats[*rover->bottompic].lumpnum, rover->master->frontsector, 255, false, gr_frontsector->lightlist[light].extra_colormap); } } - if (*rover->topheight >= gr_frontsector->floorheight && - *rover->topheight <= gr_frontsector->ceilingheight && - ((dup_viewz > *rover->topheight && !(rover->flags & FF_INVERTPLANES)) || - (dup_viewz < *rover->topheight && (rover->flags & FF_BOTHPLANES || rover->flags & FF_INVERTPLANES)))) + + // top plane +#ifdef ESLOPE + if (*rover->t_slope) + { + cullHeight = P_GetZAt(*rover->t_slope, viewx, viewy); + centerHeight = P_GetZAt(*rover->t_slope, gr_frontsector->soundorg.x, gr_frontsector->soundorg.y); + } + else +#endif + cullHeight = centerHeight = *rover->topheight; + + if (centerHeight >= locFloorHeight && + centerHeight <= locCeilingHeight && + ((dup_viewz > cullHeight && !(rover->flags & FF_INVERTPLANES)) || + (dup_viewz < cullHeight && (rover->flags & FF_BOTHPLANES || rover->flags & FF_INVERTPLANES)))) { if (rover->flags & FF_FOG) { UINT8 alpha; - light = R_GetPlaneLight(gr_frontsector, *rover->topheight, dup_viewz < *rover->topheight ? true : false); + light = R_GetPlaneLight(gr_frontsector, centerHeight, dup_viewz < cullHeight ? true : false); if (rover->master->frontsector->extra_colormap) alpha = HWR_FogBlockAlpha(*gr_frontsector->lightlist[light].lightlevel, rover->master->frontsector->extra_colormap->rgba, rover->master->frontsector->extra_colormap->fadergba); @@ -3088,7 +3600,7 @@ static void HWR_Subsector(size_t num) } else if (rover->flags & FF_TRANSLUCENT) { - light = R_GetPlaneLight(gr_frontsector, *rover->topheight, dup_viewz < *rover->topheight ? true : false); + light = R_GetPlaneLight(gr_frontsector, centerHeight, dup_viewz < cullHeight ? true : false); #ifndef SORTING HWR_Add3DWater(levelflats[*rover->toppic].lumpnum, &extrasubsectors[num], @@ -3108,7 +3620,7 @@ static void HWR_Subsector(size_t num) else { HWR_GetFlat(levelflats[*rover->toppic].lumpnum); - light = R_GetPlaneLight(gr_frontsector, *rover->topheight, dup_viewz < *rover->topheight ? true : false); + light = R_GetPlaneLight(gr_frontsector, centerHeight, dup_viewz < cullHeight ? true : false); HWR_RenderPlane(NULL, &extrasubsectors[num], *rover->topheight, PF_Occlude, *gr_frontsector->lightlist[light].lightlevel, levelflats[*rover->toppic].lumpnum, rover->master->frontsector, 255, false, gr_frontsector->lightlist[light].extra_colormap); } @@ -3980,11 +4492,10 @@ static void HWR_SortVisSprites(void) gr_vsprsortedhead.next = gr_vsprsortedhead.prev = &gr_vsprsortedhead; for (i = 0; i < gr_visspritecount; i++) { - bestdist = ZCLIP_PLANE-1; - bestdispoffset = INT32_MAX; + best = NULL; for (ds = unsorted.next; ds != &unsorted; ds = ds->next) { - if (ds->tz > bestdist) + if (!best || ds->tz > bestdist) { bestdist = ds->tz; bestdispoffset = ds->dispoffset; @@ -4499,7 +5010,7 @@ static void HWR_ProjectSprite(mobj_t *thing) tz = (tr_x * gr_viewcos) + (tr_y * gr_viewsin); // thing is behind view plane? - if (tz < ZCLIP_PLANE) + if (tz < ZCLIP_PLANE && (!cv_grmd2.value || md2_models[thing->sprite].notfound == true)) //Yellow: Only MD2's dont disappear return; tx = (tr_x * gr_viewsin) - (tr_y * gr_viewcos);