diff options
Diffstat (limited to 'src/heretic/r_plane.c')
| -rw-r--r-- | src/heretic/r_plane.c | 661 |
1 files changed, 352 insertions, 309 deletions
diff --git a/src/heretic/r_plane.c b/src/heretic/r_plane.c index 61a32f1c..04e685a1 100644 --- a/src/heretic/r_plane.c +++ b/src/heretic/r_plane.c @@ -1,56 +1,78 @@ +// Emacs style mode select -*- C++ -*- +//----------------------------------------------------------------------------- +// +// Copyright(C) 1993-1996 Id Software, Inc. +// Copyright(C) 1993-2008 Raven Software +// +// This program is free software; you can redistribute it and/or +// modify it under the terms of the GNU General Public License +// as published by the Free Software Foundation; either version 2 +// of the License, or (at your option) any later version. +// +// This program is distributed in the hope that it will be useful, +// but WITHOUT ANY WARRANTY; without even the implied warranty of +// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the +// GNU General Public License for more details. +// +// You should have received a copy of the GNU General Public License +// along with this program; if not, write to the Free Software +// Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA +// 02111-1307, USA. +// +//----------------------------------------------------------------------------- // R_planes.c #include "DoomDef.h" #include "R_local.h" -planefunction_t floorfunc, ceilingfunc; +planefunction_t floorfunc, ceilingfunc; // // sky mapping // -int skyflatnum; -int skytexture; -int skytexturemid; -fixed_t skyiscale; +int skyflatnum; +int skytexture; +int skytexturemid; +fixed_t skyiscale; // // opening // -visplane_t visplanes[MAXVISPLANES], *lastvisplane; -visplane_t *floorplane, *ceilingplane; +visplane_t visplanes[MAXVISPLANES], *lastvisplane; +visplane_t *floorplane, *ceilingplane; -short openings[MAXOPENINGS], *lastopening; +short openings[MAXOPENINGS], *lastopening; // // clip values are the solid pixel bounding the range // floorclip starts out SCREENHEIGHT // ceilingclip starts out -1 // -short floorclip[SCREENWIDTH]; -short ceilingclip[SCREENWIDTH]; +short floorclip[SCREENWIDTH]; +short ceilingclip[SCREENWIDTH]; // // spanstart holds the start of a plane span // initialized to 0 at start // -int spanstart[SCREENHEIGHT]; -int spanstop[SCREENHEIGHT]; +int spanstart[SCREENHEIGHT]; +int spanstop[SCREENHEIGHT]; // // texture mapping // -lighttable_t **planezlight; -fixed_t planeheight; +lighttable_t **planezlight; +fixed_t planeheight; -fixed_t yslope[SCREENHEIGHT]; -fixed_t distscale[SCREENWIDTH]; -fixed_t basexscale, baseyscale; +fixed_t yslope[SCREENHEIGHT]; +fixed_t distscale[SCREENWIDTH]; +fixed_t basexscale, baseyscale; -fixed_t cachedheight[SCREENHEIGHT]; -fixed_t cacheddistance[SCREENHEIGHT]; -fixed_t cachedxstep[SCREENHEIGHT]; -fixed_t cachedystep[SCREENHEIGHT]; +fixed_t cachedheight[SCREENHEIGHT]; +fixed_t cacheddistance[SCREENHEIGHT]; +fixed_t cachedxstep[SCREENHEIGHT]; +fixed_t cachedystep[SCREENHEIGHT]; /* @@ -63,11 +85,11 @@ fixed_t cachedystep[SCREENHEIGHT]; ================ */ -void R_InitSkyMap (void) +void R_InitSkyMap(void) { - skyflatnum = R_FlatNumForName ("F_SKY1"); - skytexturemid = 200*FRACUNIT; - skyiscale = FRACUNIT; + skyflatnum = R_FlatNumForName("F_SKY1"); + skytexturemid = 200 * FRACUNIT; + skyiscale = FRACUNIT; } @@ -80,7 +102,7 @@ void R_InitSkyMap (void) ==================== */ -void R_InitPlanes (void) +void R_InitPlanes(void) { } @@ -103,52 +125,52 @@ BASIC PRIMITIVE ================ */ -void R_MapPlane (int y, int x1, int x2) +void R_MapPlane(int y, int x1, int x2) { - angle_t angle; - fixed_t distance, length; - unsigned index; - + angle_t angle; + fixed_t distance, length; + unsigned index; + #ifdef RANGECHECK - if (x2 < x1 || x1<0 || x2>=viewwidth || (unsigned)y>viewheight) - I_Error ("R_MapPlane: %i, %i at %i",x1,x2,y); + if (x2 < x1 || x1 < 0 || x2 >= viewwidth || (unsigned) y > viewheight) + I_Error("R_MapPlane: %i, %i at %i", x1, x2, y); #endif - if (planeheight != cachedheight[y]) - { - cachedheight[y] = planeheight; - distance = cacheddistance[y] = FixedMul (planeheight, yslope[y]); - - ds_xstep = cachedxstep[y] = FixedMul (distance,basexscale); - ds_ystep = cachedystep[y] = FixedMul (distance,baseyscale); - } - else - { - distance = cacheddistance[y]; - ds_xstep = cachedxstep[y]; - ds_ystep = cachedystep[y]; - } - - length = FixedMul (distance,distscale[x1]); - angle = (viewangle + xtoviewangle[x1])>>ANGLETOFINESHIFT; - ds_xfrac = viewx + FixedMul(finecosine[angle], length); - ds_yfrac = -viewy - FixedMul(finesine[angle], length); - - if (fixedcolormap) - ds_colormap = fixedcolormap; - else - { - index = distance >> LIGHTZSHIFT; - if (index >= MAXLIGHTZ ) - index = MAXLIGHTZ-1; - ds_colormap = planezlight[index]; - } - - ds_y = y; - ds_x1 = x1; - ds_x2 = x2; - - spanfunc (); // high or low detail + if (planeheight != cachedheight[y]) + { + cachedheight[y] = planeheight; + distance = cacheddistance[y] = FixedMul(planeheight, yslope[y]); + + ds_xstep = cachedxstep[y] = FixedMul(distance, basexscale); + ds_ystep = cachedystep[y] = FixedMul(distance, baseyscale); + } + else + { + distance = cacheddistance[y]; + ds_xstep = cachedxstep[y]; + ds_ystep = cachedystep[y]; + } + + length = FixedMul(distance, distscale[x1]); + angle = (viewangle + xtoviewangle[x1]) >> ANGLETOFINESHIFT; + ds_xfrac = viewx + FixedMul(finecosine[angle], length); + ds_yfrac = -viewy - FixedMul(finesine[angle], length); + + if (fixedcolormap) + ds_colormap = fixedcolormap; + else + { + index = distance >> LIGHTZSHIFT; + if (index >= MAXLIGHTZ) + index = MAXLIGHTZ - 1; + ds_colormap = planezlight[index]; + } + + ds_y = y; + ds_x1 = x1; + ds_x2 = x2; + + spanfunc(); // high or low detail } //============================================================================= @@ -162,32 +184,32 @@ void R_MapPlane (int y, int x1, int x2) ==================== */ -void R_ClearPlanes (void) +void R_ClearPlanes(void) { - int i; - angle_t angle; - + int i; + angle_t angle; + // // opening / clipping determination -// - for (i=0 ; i<viewwidth ; i++) - { - floorclip[i] = viewheight; - ceilingclip[i] = -1; - } - - lastvisplane = visplanes; - lastopening = openings; - +// + for (i = 0; i < viewwidth; i++) + { + floorclip[i] = viewheight; + ceilingclip[i] = -1; + } + + lastvisplane = visplanes; + lastopening = openings; + // // texture calculation // - memset (cachedheight, 0, sizeof(cachedheight)); - angle = (viewangle-ANG90)>>ANGLETOFINESHIFT; // left to right mapping - - // scale will be unit scale at SCREENWIDTH/2 distance - basexscale = FixedDiv (finecosine[angle],centerxfrac); - baseyscale = -FixedDiv (finesine[angle],centerxfrac); + memset(cachedheight, 0, sizeof(cachedheight)); + angle = (viewangle - ANG90) >> ANGLETOFINESHIFT; // left to right mapping + + // scale will be unit scale at SCREENWIDTH/2 distance + basexscale = FixedDiv(finecosine[angle], centerxfrac); + baseyscale = -FixedDiv(finesine[angle], centerxfrac); } @@ -201,45 +223,44 @@ void R_ClearPlanes (void) */ visplane_t *R_FindPlane(fixed_t height, int picnum, - int lightlevel, int special) + int lightlevel, int special) { - visplane_t *check; - - if(picnum == skyflatnum) - { - // all skies map together - height = 0; - lightlevel = 0; - } - - for(check = visplanes; check < lastvisplane; check++) - { - if(height == check->height - && picnum == check->picnum - && lightlevel == check->lightlevel - && special == check->special) - break; - } - - if(check < lastvisplane) - { - return(check); - } - - if(lastvisplane-visplanes == MAXVISPLANES) - { - I_Error("R_FindPlane: no more visplanes"); - } - - lastvisplane++; - check->height = height; - check->picnum = picnum; - check->lightlevel = lightlevel; - check->special = special; - check->minx = SCREENWIDTH; - check->maxx = -1; - memset(check->top,0xff,sizeof(check->top)); - return(check); + visplane_t *check; + + if (picnum == skyflatnum) + { + // all skies map together + height = 0; + lightlevel = 0; + } + + for (check = visplanes; check < lastvisplane; check++) + { + if (height == check->height + && picnum == check->picnum + && lightlevel == check->lightlevel && special == check->special) + break; + } + + if (check < lastvisplane) + { + return (check); + } + + if (lastvisplane - visplanes == MAXVISPLANES) + { + I_Error("R_FindPlane: no more visplanes"); + } + + lastvisplane++; + check->height = height; + check->picnum = picnum; + check->lightlevel = lightlevel; + check->special = special; + check->minx = SCREENWIDTH; + check->maxx = -1; + memset(check->top, 0xff, sizeof(check->top)); + return (check); } /* @@ -250,57 +271,57 @@ visplane_t *R_FindPlane(fixed_t height, int picnum, =============== */ -visplane_t *R_CheckPlane (visplane_t *pl, int start, int stop) +visplane_t *R_CheckPlane(visplane_t * pl, int start, int stop) { - int intrl, intrh; - int unionl, unionh; - int x; - - if (start < pl->minx) - { - intrl = pl->minx; - unionl = start; - } - else - { - unionl = pl->minx; - intrl = start; - } - - if (stop > pl->maxx) - { - intrh = pl->maxx; - unionh = stop; - } - else - { - unionh = pl->maxx; - intrh = stop; - } - - for (x=intrl ; x<= intrh ; x++) - if (pl->top[x] != 0xff) - break; - - if (x > intrh) - { - pl->minx = unionl; - pl->maxx = unionh; - return pl; // use the same one - } - + int intrl, intrh; + int unionl, unionh; + int x; + + if (start < pl->minx) + { + intrl = pl->minx; + unionl = start; + } + else + { + unionl = pl->minx; + intrl = start; + } + + if (stop > pl->maxx) + { + intrh = pl->maxx; + unionh = stop; + } + else + { + unionh = pl->maxx; + intrh = stop; + } + + for (x = intrl; x <= intrh; x++) + if (pl->top[x] != 0xff) + break; + + if (x > intrh) + { + pl->minx = unionl; + pl->maxx = unionh; + return pl; // use the same one + } + // make a new visplane - lastvisplane->height = pl->height; - lastvisplane->picnum = pl->picnum; - lastvisplane->lightlevel = pl->lightlevel; - lastvisplane->special = pl->special; - pl = lastvisplane++; - pl->minx = start; - pl->maxx = stop; - memset (pl->top,0xff,sizeof(pl->top)); - - return pl; + lastvisplane->height = pl->height; + lastvisplane->picnum = pl->picnum; + lastvisplane->lightlevel = pl->lightlevel; + lastvisplane->special = pl->special; + pl = lastvisplane++; + pl->minx = start; + pl->maxx = stop; + memset(pl->top, 0xff, sizeof(pl->top)); + + return pl; } @@ -315,29 +336,29 @@ visplane_t *R_CheckPlane (visplane_t *pl, int start, int stop) ================ */ -void R_MakeSpans (int x, int t1, int b1, int t2, int b2) +void R_MakeSpans(int x, int t1, int b1, int t2, int b2) { - while (t1 < t2 && t1<=b1) - { - R_MapPlane (t1,spanstart[t1],x-1); - t1++; - } - while (b1 > b2 && b1>=t1) - { - R_MapPlane (b1,spanstart[b1],x-1); - b1--; - } - - while (t2 < t1 && t2<=b2) - { - spanstart[t2] = x; - t2++; - } - while (b2 > b1 && b2>=t2) - { - spanstart[b2] = x; - b2--; - } + while (t1 < t2 && t1 <= b1) + { + R_MapPlane(t1, spanstart[t1], x - 1); + t1++; + } + while (b1 > b2 && b1 >= t1) + { + R_MapPlane(b1, spanstart[b1], x - 1); + b1--; + } + + while (t2 < t1 && t2 <= b2) + { + spanstart[t2] = x; + t2++; + } + while (b2 > b1 && b2 >= t2) + { + spanstart[b2] = x; + b2--; + } } @@ -351,122 +372,144 @@ void R_MakeSpans (int x, int t1, int b1, int t2, int b2) ================ */ -void R_DrawPlanes (void) +void R_DrawPlanes(void) { - visplane_t *pl; - int light; - int x, stop; - int angle; - byte *tempSource; - - byte *dest; - int count; - fixed_t frac, fracstep; - -extern byte *ylookup[MAXHEIGHT]; -extern int columnofs[MAXWIDTH]; + visplane_t *pl; + int light; + int x, stop; + int angle; + byte *tempSource; + + byte *dest; + int count; + fixed_t frac, fracstep; + + extern byte *ylookup[MAXHEIGHT]; + extern int columnofs[MAXWIDTH]; + +#ifdef RANGECHECK + if (ds_p - drawsegs > MAXDRAWSEGS) + I_Error("R_DrawPlanes: drawsegs overflow (%i)", ds_p - drawsegs); + if (lastvisplane - visplanes > MAXVISPLANES) + I_Error("R_DrawPlanes: visplane overflow (%i)", + lastvisplane - visplanes); + if (lastopening - openings > MAXOPENINGS) + I_Error("R_DrawPlanes: opening overflow (%i)", + lastopening - openings); +#endif + + for (pl = visplanes; pl < lastvisplane; pl++) + { + if (pl->minx > pl->maxx) + continue; + // + // sky flat + // + if (pl->picnum == skyflatnum) + { + dc_iscale = skyiscale; + dc_colormap = colormaps; // sky is allways drawn full bright + dc_texturemid = skytexturemid; + for (x = pl->minx; x <= pl->maxx; x++) + { + dc_yl = pl->top[x]; + dc_yh = pl->bottom[x]; + if (dc_yl <= dc_yh) + { + angle = (viewangle + xtoviewangle[x]) >> ANGLETOSKYSHIFT; + dc_x = x; + dc_source = R_GetColumn(skytexture, angle); + + count = dc_yh - dc_yl; + if (count < 0) + return; #ifdef RANGECHECK - if (ds_p - drawsegs > MAXDRAWSEGS) - I_Error ("R_DrawPlanes: drawsegs overflow (%i)", ds_p - drawsegs); - if (lastvisplane - visplanes > MAXVISPLANES) - I_Error ("R_DrawPlanes: visplane overflow (%i)", lastvisplane - visplanes); - if (lastopening - openings > MAXOPENINGS) - I_Error ("R_DrawPlanes: opening overflow (%i)", lastopening - openings); + if ((unsigned) dc_x >= SCREENWIDTH || dc_yl < 0 + || dc_yh >= SCREENHEIGHT) + I_Error("R_DrawColumn: %i to %i at %i", dc_yl, dc_yh, + dc_x); #endif - for (pl = visplanes ; pl < lastvisplane ; pl++) - { - if (pl->minx > pl->maxx) - continue; - // - // sky flat - // - if (pl->picnum == skyflatnum) - { - dc_iscale = skyiscale; - dc_colormap = colormaps;// sky is allways drawn full bright - dc_texturemid = skytexturemid; - for (x=pl->minx ; x <= pl->maxx ; x++) - { - dc_yl = pl->top[x]; - dc_yh = pl->bottom[x]; - if (dc_yl <= dc_yh) - { - angle = (viewangle + xtoviewangle[x])>>ANGLETOSKYSHIFT; - dc_x = x; - dc_source = R_GetColumn(skytexture, angle); - - count = dc_yh - dc_yl;
- if (count < 0)
- return;
-
-#ifdef RANGECHECK
- if ((unsigned)dc_x >= SCREENWIDTH || dc_yl < 0 || dc_yh >= SCREENHEIGHT)
- I_Error ("R_DrawColumn: %i to %i at %i", dc_yl, dc_yh, dc_x);
-#endif
-
- dest = ylookup[dc_yl] + columnofs[dc_x];
-
- fracstep = 1;
- frac = (dc_texturemid>>FRACBITS) + (dc_yl-centery);
- do
- {
- *dest = dc_source[frac];
- dest += SCREENWIDTH;
- frac += fracstep;
- } while (count--);
- -// colfunc (); - } - } - continue; - } - - // - // regular flat - // - tempSource = W_CacheLumpNum(firstflat + - flattranslation[pl->picnum], PU_STATIC); - - switch(pl->special) - { - case 25: case 26: case 27: case 28: case 29: // Scroll_North - ds_source = tempSource; - break; - case 20: case 21: case 22: case 23: case 24: // Scroll_East - ds_source = tempSource+((63-((leveltime>>1)&63))<< - (pl->special-20)&63); - //ds_source = tempSource+((leveltime>>1)&63); - break; - case 30: case 31: case 32: case 33: case 34: // Scroll_South - ds_source = tempSource; - break; - case 35: case 36: case 37: case 38: case 39: // Scroll_West - ds_source = tempSource; - break; - case 4: // Scroll_EastLavaDamage - ds_source = tempSource+(((63-((leveltime>>1)&63))<<3)&63); - break; - default: - ds_source = tempSource; - } - planeheight = abs(pl->height-viewz); - light = (pl->lightlevel >> LIGHTSEGSHIFT)+extralight; - if (light >= LIGHTLEVELS) - light = LIGHTLEVELS-1; - if (light < 0) - light = 0; - planezlight = zlight[light]; - - pl->top[pl->maxx+1] = 0xff; - pl->top[pl->minx-1] = 0xff; - - stop = pl->maxx + 1; - for (x=pl->minx ; x<= stop ; x++) - R_MakeSpans (x,pl->top[x-1],pl->bottom[x-1] - ,pl->top[x],pl->bottom[x]); - - Z_ChangeTag (tempSource, PU_CACHE); - } + dest = ylookup[dc_yl] + columnofs[dc_x]; + + fracstep = 1; + frac = (dc_texturemid >> FRACBITS) + (dc_yl - centery); + do + { + *dest = dc_source[frac]; + dest += SCREENWIDTH; + frac += fracstep; + } + while (count--); + +// colfunc (); + } + } + continue; + } + + // + // regular flat + // + tempSource = W_CacheLumpNum(firstflat + + flattranslation[pl->picnum], PU_STATIC); + + switch (pl->special) + { + case 25: + case 26: + case 27: + case 28: + case 29: // Scroll_North + ds_source = tempSource; + break; + case 20: + case 21: + case 22: + case 23: + case 24: // Scroll_East + ds_source = tempSource + ((63 - ((leveltime >> 1) & 63)) << + (pl->special - 20) & 63); + //ds_source = tempSource+((leveltime>>1)&63); + break; + case 30: + case 31: + case 32: + case 33: + case 34: // Scroll_South + ds_source = tempSource; + break; + case 35: + case 36: + case 37: + case 38: + case 39: // Scroll_West + ds_source = tempSource; + break; + case 4: // Scroll_EastLavaDamage + ds_source = + tempSource + (((63 - ((leveltime >> 1) & 63)) << 3) & 63); + break; + default: + ds_source = tempSource; + } + planeheight = abs(pl->height - viewz); + light = (pl->lightlevel >> LIGHTSEGSHIFT) + extralight; + if (light >= LIGHTLEVELS) + light = LIGHTLEVELS - 1; + if (light < 0) + light = 0; + planezlight = zlight[light]; + + pl->top[pl->maxx + 1] = 0xff; + pl->top[pl->minx - 1] = 0xff; + + stop = pl->maxx + 1; + for (x = pl->minx; x <= stop; x++) + R_MakeSpans(x, pl->top[x - 1], pl->bottom[x - 1], pl->top[x], + pl->bottom[x]); + + Z_ChangeTag(tempSource, PU_CACHE); + } } |