2 Copyright (C) 1996-1997 Id Software, Inc.
4 This program is free software; you can redistribute it and/or
5 modify it under the terms of the GNU General Public License
6 as published by the Free Software Foundation; either version 2
7 of the License, or (at your option) any later version.
9 This program is distributed in the hope that it will be useful,
10 but WITHOUT ANY WARRANTY; without even the implied warranty of
11 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.
13 See the GNU General Public License for more details.
15 You should have received a copy of the GNU General Public License
16 along with this program; if not, write to the Free Software
17 Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
24 rdlight_t r_dlight[MAX_DLIGHTS];
27 cvar_t r_lightmodels = {CVAR_SAVE, "r_lightmodels", "1"};
28 cvar_t r_vismarklights = {0, "r_vismarklights", "1"};
29 cvar_t r_lightmodelhardness = {CVAR_SAVE, "r_lightmodelhardness", "0.9"};
31 static rtexture_t *lightcorona;
32 static rtexturepool_t *lighttexturepool;
34 void r_light_start(void)
38 byte pixels[32][32][4];
39 lighttexturepool = R_AllocTexturePool();
40 for (y = 0;y < 32;y++)
42 dy = (y - 15.5f) * (1.0f / 16.0f);
43 for (x = 0;x < 32;x++)
45 dx = (x - 15.5f) * (1.0f / 16.0f);
46 a = ((1.0f / (dx * dx + dy * dy + 0.2f)) - (1.0f / (1.0f + 0.2))) * 8.0f / (1.0f / (1.0f + 0.2));
48 pixels[y][x][0] = 255;
49 pixels[y][x][1] = 255;
50 pixels[y][x][2] = 255;
53 // for testing the size of the corona textures
56 pixels[y][x][0] = 255;
59 pixels[y][x][3] = 255;
64 lightcorona = R_LoadTexture (lighttexturepool, "lightcorona", 32, 32, &pixels[0][0][0], TEXTYPE_RGBA, TEXF_PRECACHE | TEXF_ALPHA);
67 void r_light_shutdown(void)
69 lighttexturepool = NULL;
73 void r_light_newmap(void)
77 void R_Light_Init(void)
79 Cvar_RegisterVariable(&r_lightmodels);
80 Cvar_RegisterVariable(&r_lightmodelhardness);
81 Cvar_RegisterVariable(&r_vismarklights);
82 R_RegisterModule("R_Light", r_light_start, r_light_shutdown, r_light_newmap);
90 void R_AnimateLight (void)
96 // 'm' is normal light, 'a' is no light, 'z' is double bright
97 i = (int)(cl.time * 10);
98 for (j = 0;j < MAX_LIGHTSTYLES;j++)
100 if (!cl_lightstyle[j].length)
102 d_lightstylevalue[j] = 256;
105 k = i % cl_lightstyle[j].length;
106 k = cl_lightstyle[j].map[k] - 'a';
108 d_lightstylevalue[j] = k;
113 void R_BuildLightList(void)
122 if (!r_dynamic.integer)
125 for (i = 0;i < MAX_DLIGHTS;i++)
130 rd = &r_dlight[r_numdlights++];
131 VectorCopy(cd->origin, rd->origin);
132 VectorScale(cd->color, cd->radius * 128.0f, rd->light);
133 rd->cullradius = (1.0f / 128.0f) * sqrt(DotProduct(rd->light, rd->light));
134 // clamp radius to avoid overflowing division table in lightmap code
135 if (rd->cullradius > 2048.0f)
136 rd->cullradius = 2048.0f;
137 rd->cullradius2 = rd->cullradius * rd->cullradius;
138 rd->lightsubtract = 1.0f / rd->cullradius2;
141 c_dlights++; // count every dlight in use
145 static int coronapolyindex[6] = {0, 1, 2, 0, 2, 3};
147 void R_DrawCoronas(void)
151 float tvxyz[4][4], tvst[4][2], scale, viewdist, diff[3], dist;
153 memset(&m, 0, sizeof(m));
154 m.transparent = false;
155 m.blendfunc1 = GL_SRC_ALPHA;
156 m.blendfunc2 = GL_ONE;
157 m.depthdisable = true; // magic
160 m.index = coronapolyindex;
161 m.vertex = &tvxyz[0][0];
162 m.vertexstep = sizeof(float[4]);
163 m.tex[0] = R_GetTexture(lightcorona);
164 m.texcoords[0] = &tvst[0][0];
165 m.texcoordstep[0] = sizeof(float[2]);
174 viewdist = DotProduct(r_origin, vpn);
175 for (i = 0;i < r_numdlights;i++)
178 dist = (DotProduct(rd->origin, vpn) - viewdist);
181 // trace to a point just barely closer to the eye
182 VectorSubtract(rd->origin, vpn, diff);
183 if (TraceLine(r_origin, diff, NULL, NULL, 0, true) == 1)
185 scale = 1.0f / 65536.0f;//64.0f / (dist * dist + 1024.0f);
186 m.cr = rd->light[0] * scale;
187 m.cg = rd->light[1] * scale;
188 m.cb = rd->light[2] * scale;
192 VectorSubtract(rd->origin, r_origin, diff);
193 m.ca *= 1 - exp(fogdensity/DotProduct(diff,diff));
195 // make it larger in the distance to keep a consistent size
196 //scale = 0.4f * dist;
198 scale = rd->cullradius;
199 tvxyz[0][0] = rd->origin[0] - vright[0] * scale - vup[0] * scale;
200 tvxyz[0][1] = rd->origin[1] - vright[1] * scale - vup[1] * scale;
201 tvxyz[0][2] = rd->origin[2] - vright[2] * scale - vup[2] * scale;
202 tvxyz[1][0] = rd->origin[0] - vright[0] * scale + vup[0] * scale;
203 tvxyz[1][1] = rd->origin[1] - vright[1] * scale + vup[1] * scale;
204 tvxyz[1][2] = rd->origin[2] - vright[2] * scale + vup[2] * scale;
205 tvxyz[2][0] = rd->origin[0] + vright[0] * scale + vup[0] * scale;
206 tvxyz[2][1] = rd->origin[1] + vright[1] * scale + vup[1] * scale;
207 tvxyz[2][2] = rd->origin[2] + vright[2] * scale + vup[2] * scale;
208 tvxyz[3][0] = rd->origin[0] + vright[0] * scale - vup[0] * scale;
209 tvxyz[3][1] = rd->origin[1] + vright[1] * scale - vup[1] * scale;
210 tvxyz[3][2] = rd->origin[2] + vright[2] * scale - vup[2] * scale;
211 R_Mesh_DrawDecal(&m);
218 =============================================================================
222 =============================================================================
230 static void R_OldMarkLights (vec3_t lightorigin, rdlight_t *rd, int bit, int bitindex, mnode_t *node)
232 float ndist, maxdist;
237 if (!r_dynamic.integer)
240 // for comparisons to minimum acceptable light
241 maxdist = rd->cullradius2;
244 if (node->contents < 0)
246 if (node->contents != CONTENTS_SOLID)
248 leaf = (mleaf_t *)node;
249 if (leaf->dlightframe != r_framecount) // not dynamic until now
251 leaf->dlightbits[0] = leaf->dlightbits[1] = leaf->dlightbits[2] = leaf->dlightbits[3] = leaf->dlightbits[4] = leaf->dlightbits[5] = leaf->dlightbits[6] = leaf->dlightbits[7] = 0;
252 leaf->dlightframe = r_framecount;
254 leaf->dlightbits[bitindex] |= bit;
259 ndist = PlaneDiff(lightorigin, node->plane);
261 if (ndist > rd->cullradius)
263 node = node->children[0];
266 if (ndist < -rd->cullradius)
268 node = node->children[1];
273 surf = currentrenderentity->model->surfaces + node->firstsurface;
274 for (i=0 ; i<node->numsurfaces ; i++, surf++)
276 int d, impacts, impactt;
277 float dist, dist2, impact[3];
278 if (surf->visframe != r_framecount)
281 if (surf->flags & SURF_PLANEBACK)
284 if (dist < -0.25f && !(surf->flags & SURF_LIGHTBOTHSIDES))
288 if (dist2 >= maxdist)
291 impact[0] = rd->origin[0] - surf->plane->normal[0] * dist;
292 impact[1] = rd->origin[1] - surf->plane->normal[1] * dist;
293 impact[2] = rd->origin[2] - surf->plane->normal[2] * dist;
295 impacts = DotProduct (impact, surf->texinfo->vecs[0]) + surf->texinfo->vecs[0][3] - surf->texturemins[0];
297 d = bound(0, impacts, surf->extents[0] + 16) - impacts;
302 impactt = DotProduct (impact, surf->texinfo->vecs[1]) + surf->texinfo->vecs[1][3] - surf->texturemins[1];
304 d = bound(0, impactt, surf->extents[1] + 16) - impactt;
311 d = DotProduct (impact, surf->texinfo->vecs[0]) + surf->texinfo->vecs[0][3] - surf->texturemins[0];
316 if (dist2 >= maxdist)
321 d -= surf->extents[0] + 16;
325 if (dist2 >= maxdist)
330 d = DotProduct (impact, surf->texinfo->vecs[1]) + surf->texinfo->vecs[1][3] - surf->texturemins[1];
335 if (dist2 >= maxdist)
340 d -= surf->extents[1] + 16;
344 if (dist2 >= maxdist)
350 if (surf->dlightframe != r_framecount) // not dynamic until now
352 surf->dlightbits[0] = surf->dlightbits[1] = surf->dlightbits[2] = surf->dlightbits[3] = surf->dlightbits[4] = surf->dlightbits[5] = surf->dlightbits[6] = surf->dlightbits[7] = 0;
353 surf->dlightframe = r_framecount;
355 surf->dlightbits[bitindex] |= bit;
358 if (((surf->flags & SURF_PLANEBACK) == 0) == ((PlaneDist(lightorigin, surf->plane)) >= surf->plane->dist))
360 if (surf->dlightframe != r_framecount) // not dynamic until now
362 surf->dlightbits[0] = surf->dlightbits[1] = surf->dlightbits[2] = surf->dlightbits[3] = surf->dlightbits[4] = surf->dlightbits[5] = surf->dlightbits[6] = surf->dlightbits[7] = 0;
363 surf->dlightframe = r_framecount;
365 surf->dlightbits[bitindex] |= bit;
370 if (node->children[0]->contents >= 0)
372 if (node->children[1]->contents >= 0)
374 R_OldMarkLights (lightorigin, rd, bit, bitindex, node->children[0]);
375 node = node->children[1];
380 node = node->children[0];
384 else if (node->children[1]->contents >= 0)
386 node = node->children[1];
392 static void R_NoVisMarkLights (rdlight_t *rd, int bit, int bitindex)
395 softwareuntransform(rd->origin, lightorigin);
397 R_OldMarkLights(lightorigin, rd, bit, bitindex, currentrenderentity->model->nodes + currentrenderentity->model->hulls[0].firstclipnode);
401 static void R_VisMarkLights (rdlight_t *rd, int bit, int bitindex)
403 static int lightframe = 0;
407 int i, k, m, c, leafnum;
408 msurface_t *surf, **mark;
412 float low[3], high[3], dist, maxdist;
414 if (!r_dynamic.integer)
417 model = currentrenderentity->model;
418 softwareuntransform(rd->origin, lightorigin);
420 if (!r_vismarklights.integer)
422 R_OldMarkLights(lightorigin, rd, bit, bitindex, model->nodes + model->hulls[0].firstclipnode);
426 pvsleaf = Mod_PointInLeaf (lightorigin, model);
429 Con_Printf("R_VisMarkLights: NULL leaf??\n");
430 R_OldMarkLights(lightorigin, rd, bit, bitindex, model->nodes + model->hulls[0].firstclipnode);
434 in = pvsleaf->compressed_vis;
437 // no vis info, so make all visible
438 R_OldMarkLights(lightorigin, rd, bit, bitindex, model->nodes + model->hulls[0].firstclipnode);
444 low[0] = lightorigin[0] - rd->cullradius;low[1] = lightorigin[1] - rd->cullradius;low[2] = lightorigin[2] - rd->cullradius;
445 high[0] = lightorigin[0] + rd->cullradius;high[1] = lightorigin[1] + rd->cullradius;high[2] = lightorigin[2] + rd->cullradius;
447 // for comparisons to minimum acceptable light
448 maxdist = rd->cullradius2;
450 row = (model->numleafs+7)>>3;
458 for (i = 0;i < 8;i++)
462 // warning to the clumsy: numleafs is one less than it should be, it only counts leafs with vis bits (skips leaf 0)
463 leafnum = (k << 3)+i+1;
464 if (leafnum > model->numleafs)
466 leaf = &model->leafs[leafnum];
467 if (leaf->visframe != r_framecount
468 || leaf->contents == CONTENTS_SOLID
469 || leaf->mins[0] > high[0] || leaf->maxs[0] < low[0]
470 || leaf->mins[1] > high[1] || leaf->maxs[1] < low[1]
471 || leaf->mins[2] > high[2] || leaf->maxs[2] < low[2])
473 if (leaf->dlightframe != r_framecount)
475 // not dynamic until now
476 leaf->dlightbits[0] = leaf->dlightbits[1] = leaf->dlightbits[2] = leaf->dlightbits[3] = leaf->dlightbits[4] = leaf->dlightbits[5] = leaf->dlightbits[6] = leaf->dlightbits[7] = 0;
477 leaf->dlightframe = r_framecount;
479 leaf->dlightbits[bitindex] |= bit;
480 if ((m = leaf->nummarksurfaces))
482 mark = leaf->firstmarksurface;
486 // if not visible in current frame, or already marked because it was in another leaf we passed, skip
487 if (surf->lightframe == lightframe)
489 surf->lightframe = lightframe;
490 if (surf->visframe != r_framecount)
492 dist = PlaneDiff(lightorigin, surf->plane);
493 if (surf->flags & SURF_PLANEBACK)
495 // LordHavoc: make sure it is infront of the surface and not too far away
496 if (dist < rd->cullradius && (dist > -0.25f || ((surf->flags & SURF_LIGHTBOTHSIDES) && dist > -rd->cullradius)))
499 int impacts, impactt;
500 float dist2, impact[3];
504 impact[0] = rd->origin[0] - surf->plane->normal[0] * dist;
505 impact[1] = rd->origin[1] - surf->plane->normal[1] * dist;
506 impact[2] = rd->origin[2] - surf->plane->normal[2] * dist;
509 d = DotProduct (impact, surf->texinfo->vecs[0]) + surf->texinfo->vecs[0][3] - surf->texturemins[0];
518 d -= surf->extents[0];
527 d = DotProduct (impact, surf->texinfo->vecs[1]) + surf->texinfo->vecs[1][3] - surf->texturemins[1];
536 d -= surf->extents[1];
547 impacts = DotProduct (impact, surf->texinfo->vecs[0]) + surf->texinfo->vecs[0][3] - surf->texturemins[0];
548 d = bound(0, impacts, surf->extents[0] + 16) - impacts;
553 impactt = DotProduct (impact, surf->texinfo->vecs[1]) + surf->texinfo->vecs[1][3] - surf->texturemins[1];
554 d = bound(0, impactt, surf->extents[1] + 16) - impactt;
561 if (surf->dlightframe != r_framecount) // not dynamic until now
563 surf->dlightbits[0] = surf->dlightbits[1] = surf->dlightbits[2] = surf->dlightbits[3] = surf->dlightbits[4] = surf->dlightbits[5] = surf->dlightbits[6] = surf->dlightbits[7] = 0;
564 surf->dlightframe = r_framecount;
566 surf->dlightbits[bitindex] |= bit;
581 void R_MarkLights(void)
584 for (i = 0;i < r_numdlights;i++)
585 R_VisMarkLights (r_dlight + i, 1 << (i & 31), i >> 5);
589 =============================================================================
593 =============================================================================
596 static int RecursiveLightPoint (vec3_t color, mnode_t *node, float x, float y, float startz, float endz)
598 int side, distz = endz - startz;
603 if (node->contents < 0)
604 return false; // didn't hit anything
606 switch (node->plane->type)
609 node = node->children[x < node->plane->dist];
612 node = node->children[y < node->plane->dist];
615 side = startz < node->plane->dist;
616 if ((endz < node->plane->dist) == side)
618 node = node->children[side];
621 // found an intersection
622 // mid = startz + (endz - startz) * (startz - node->plane->dist) / (startz - endz);
623 // mid = startz + distz * (startz - node->plane->dist) / (-distz);
624 // mid = startz + (-(startz - node->plane->dist));
625 // mid = startz - (startz - node->plane->dist);
626 // mid = startz + node->plane->dist - startz;
627 mid = node->plane->dist;
630 back = front = x * node->plane->normal[0] + y * node->plane->normal[1];
631 front += startz * node->plane->normal[2];
632 back += endz * node->plane->normal[2];
633 side = front < node->plane->dist;
634 if ((back < node->plane->dist) == side)
636 node = node->children[side];
639 // found an intersection
640 // mid = startz + (endz - startz) * ((front - node->plane->dist) / ((front - node->plane->dist) - (back - node->plane->dist)));
641 // mid = startz + (endz - startz) * ((front - node->plane->dist) / (front - back));
642 mid = startz + distz * (front - node->plane->dist) / (front - back);
646 // go down front side
647 if (node->children[side]->contents >= 0 && RecursiveLightPoint (color, node->children[side], x, y, startz, mid))
648 return true; // hit something
651 // check for impact on this node
652 if (node->numsurfaces)
657 surf = cl.worldmodel->surfaces + node->firstsurface;
658 for (i = 0;i < node->numsurfaces;i++, surf++)
660 if (!(surf->flags & SURF_LIGHTMAP))
661 continue; // no lightmaps
663 ds = (int) (x * surf->texinfo->vecs[0][0] + y * surf->texinfo->vecs[0][1] + mid * surf->texinfo->vecs[0][2] + surf->texinfo->vecs[0][3]);
664 dt = (int) (x * surf->texinfo->vecs[1][0] + y * surf->texinfo->vecs[1][1] + mid * surf->texinfo->vecs[1][2] + surf->texinfo->vecs[1][3]);
666 if (ds < surf->texturemins[0] || dt < surf->texturemins[1])
669 ds -= surf->texturemins[0];
670 dt -= surf->texturemins[1];
672 if (ds > surf->extents[0] || dt > surf->extents[1])
678 int maps, line3, size3, dsfrac = ds & 15, dtfrac = dt & 15, scale = 0, r00 = 0, g00 = 0, b00 = 0, r01 = 0, g01 = 0, b01 = 0, r10 = 0, g10 = 0, b10 = 0, r11 = 0, g11 = 0, b11 = 0;
679 line3 = ((surf->extents[0]>>4)+1)*3;
680 size3 = ((surf->extents[0]>>4)+1) * ((surf->extents[1]>>4)+1)*3; // LordHavoc: *3 for colored lighting
682 lightmap = surf->samples + ((dt>>4) * ((surf->extents[0]>>4)+1) + (ds>>4))*3; // LordHavoc: *3 for color
684 for (maps = 0;maps < MAXLIGHTMAPS && surf->styles[maps] != 255;maps++)
686 scale = d_lightstylevalue[surf->styles[maps]];
687 r00 += lightmap[ 0] * scale;g00 += lightmap[ 1] * scale;b00 += lightmap[ 2] * scale;
688 r01 += lightmap[ 3] * scale;g01 += lightmap[ 4] * scale;b01 += lightmap[ 5] * scale;
689 r10 += lightmap[line3+0] * scale;g10 += lightmap[line3+1] * scale;b10 += lightmap[line3+2] * scale;
690 r11 += lightmap[line3+3] * scale;g11 += lightmap[line3+4] * scale;b11 += lightmap[line3+5] * scale;
695 // LordHavoc: here's the readable version of the interpolation
696 // code, not quite as easy for the compiler to optimize...
698 // dsfrac is the X position in the lightmap pixel, * 16
699 // dtfrac is the Y position in the lightmap pixel, * 16
700 // r00 is top left corner, r01 is top right corner
701 // r10 is bottom left corner, r11 is bottom right corner
702 // g and b are the same layout.
703 // r0 and r1 are the top and bottom intermediate results
705 // first we interpolate the top two points, to get the top
707 r0 = (((r01-r00) * dsfrac) >> 4) + r00;
708 g0 = (((g01-g00) * dsfrac) >> 4) + g00;
709 b0 = (((b01-b00) * dsfrac) >> 4) + b00;
710 // then we interpolate the bottom two points, to get the
711 // bottom edge sample
712 r1 = (((r11-r10) * dsfrac) >> 4) + r10;
713 g1 = (((g11-g10) * dsfrac) >> 4) + g10;
714 b1 = (((b11-b10) * dsfrac) >> 4) + b10;
715 // then we interpolate the top and bottom samples to get the
716 // middle sample (the one which was requested)
717 r = (((r1-r0) * dtfrac) >> 4) + r0;
718 g = (((g1-g0) * dtfrac) >> 4) + g0;
719 b = (((b1-b0) * dtfrac) >> 4) + b0;
722 color[0] += (float) ((((((((r11-r10) * dsfrac) >> 4) + r10)-((((r01-r00) * dsfrac) >> 4) + r00)) * dtfrac) >> 4) + ((((r01-r00) * dsfrac) >> 4) + r00)) * (1.0f / 32768.0f);
723 color[1] += (float) ((((((((g11-g10) * dsfrac) >> 4) + g10)-((((g01-g00) * dsfrac) >> 4) + g00)) * dtfrac) >> 4) + ((((g01-g00) * dsfrac) >> 4) + g00)) * (1.0f / 32768.0f);
724 color[2] += (float) ((((((((b11-b10) * dsfrac) >> 4) + b10)-((((b01-b00) * dsfrac) >> 4) + b00)) * dtfrac) >> 4) + ((((b01-b00) * dsfrac) >> 4) + b00)) * (1.0f / 32768.0f);
726 return true; // success
731 node = node->children[side ^ 1];
733 distz = endz - startz;
735 // return RecursiveLightPoint (color, node->children[side ^ 1], x, y, mid, endz);
739 void R_CompleteLightPoint (vec3_t color, vec3_t p, int dynamic, mleaf_t *leaf)
746 leaf = Mod_PointInLeaf(p, cl.worldmodel);
748 if (leaf->contents == CONTENTS_SOLID)
750 color[0] = color[1] = color[2] = 0;
754 if (r_fullbright.integer || !cl.worldmodel->lightdata)
756 color[0] = color[1] = color[2] = 2;
760 color[0] = color[1] = color[2] = r_ambient.value * (2.0f / 128.0f);
761 RecursiveLightPoint (color, cl.worldmodel->nodes, p[0], p[1], p[2], p[2] - 65536);
763 if (dynamic && leaf->dlightframe == r_framecount)
765 dlightbits = leaf->dlightbits;
766 for (i = 0;i < r_numdlights;i++)
768 if (!(dlightbits[i >> 5] & (1 << (i & 31))))
771 VectorSubtract (p, rd->origin, dist);
772 f = DotProduct(dist, dist) + LIGHTOFFSET;
773 if (f < rd->cullradius2)
775 f = (1.0f / f) - rd->lightsubtract;
777 VectorMA(color, f, rd->light, color);
783 void R_ModelLightPoint (vec3_t color, vec3_t p, int *dlightbits)
786 leaf = Mod_PointInLeaf(p, cl.worldmodel);
787 if (leaf->contents == CONTENTS_SOLID)
789 color[0] = color[1] = color[2] = 0;
790 dlightbits[0] = dlightbits[1] = dlightbits[2] = dlightbits[3] = dlightbits[4] = dlightbits[5] = dlightbits[6] = dlightbits[7] = 0;
794 if (r_fullbright.integer || !cl.worldmodel->lightdata)
796 color[0] = color[1] = color[2] = 2;
797 dlightbits[0] = dlightbits[1] = dlightbits[2] = dlightbits[3] = dlightbits[4] = dlightbits[5] = dlightbits[6] = dlightbits[7] = 0;
801 color[0] = color[1] = color[2] = r_ambient.value * (2.0f / 128.0f);
802 RecursiveLightPoint (color, cl.worldmodel->nodes, p[0], p[1], p[2], p[2] - 65536);
804 if (leaf->dlightframe == r_framecount)
806 dlightbits[0] = leaf->dlightbits[0];
807 dlightbits[1] = leaf->dlightbits[1];
808 dlightbits[2] = leaf->dlightbits[2];
809 dlightbits[3] = leaf->dlightbits[3];
810 dlightbits[4] = leaf->dlightbits[4];
811 dlightbits[5] = leaf->dlightbits[5];
812 dlightbits[6] = leaf->dlightbits[6];
813 dlightbits[7] = leaf->dlightbits[7];
816 dlightbits[0] = dlightbits[1] = dlightbits[2] = dlightbits[3] = dlightbits[4] = dlightbits[5] = dlightbits[6] = dlightbits[7] = 0;
819 void R_LightModel(int numverts)
821 int i, j, nearlights = 0;
822 float color[3], basecolor[3], v[3], t, *av, *avn, *avc, a, number, f, hardness, hardnessoffset, dist2;
830 nearlight[MAX_DLIGHTS], *nl;
831 int modeldlightbits[8];
833 a = currentrenderentity->alpha;
834 if (currentrenderentity->effects & EF_FULLBRIGHT)
835 basecolor[0] = basecolor[1] = basecolor[2] = 1;
838 if (r_lightmodels.integer)
840 R_ModelLightPoint(basecolor, currentrenderentity->origin, modeldlightbits);
844 // this code is unused for now
845 for (i = 0, sl = staticlight;i < staticlights && nearlights < MAX_DLIGHTS;i++, sl++)
847 if (TraceLine(currentrenderentity->origin, sl->origin, NULL, NULL, 0) == 1)
849 nl->fadetype = sl->fadetype;
850 nl->distancescale = sl->distancescale;
851 nl->radius = sl->radius;
852 VectorCopy(sl->origin, nl->origin);
853 VectorCopy(sl->color, nl->light);
854 nl->cullradius2 = 99999999;
855 nl->lightsubtract = 0;
861 for (i = 0;i < r_numdlights && nearlights < MAX_DLIGHTS;i++)
863 if (!(modeldlightbits[i >> 5] & (1 << (i & 31))))
865 if (currentrenderentity == r_dlight[i].ent)
867 f = (1.0f / LIGHTOFFSET) - nl->lightsubtract;
869 VectorMA(basecolor, f, r_dlight[i].light, basecolor);
873 // convert 0-255 radius coloring to 0-1, while also amplifying the brightness by 16
874 //if (TraceLine(currentrenderentity->origin, r_dlight[i].origin, NULL, NULL, 0) == 1)
876 // transform the light into the model's coordinate system
877 //if (gl_transform.integer)
878 // softwareuntransform(r_dlight[i].origin, nl->origin);
880 VectorCopy(r_dlight[i].origin, nl->origin);
881 nl->cullradius2 = r_dlight[i].cullradius2;
882 VectorCopy(r_dlight[i].light, nl->light);
883 nl->lightsubtract = r_dlight[i].lightsubtract;
891 R_CompleteLightPoint (basecolor, currentrenderentity->origin, true, NULL);
893 avc = aliasvertcolor;
898 hardness = r_lightmodelhardness.value;
899 hardnessoffset = (1.0f - hardness);
900 for (i = 0;i < numverts;i++)
902 VectorCopy(basecolor, color);
903 for (j = 0, nl = &nearlight[0];j < nearlights;j++, nl++)
905 // distance attenuation
906 VectorSubtract(nl->origin, av, v);
907 dist2 = DotProduct(v,v);
908 if (dist2 < nl->cullradius2)
910 f = (1.0f / (dist2 + LIGHTOFFSET)) - nl->lightsubtract;
913 // directional shading
915 t = 1.0f / sqrt(dist2);
917 number = DotProduct(v, v);
918 *((long *)&t) = 0x5f3759df - ((* (long *) &number) >> 1);
919 t = t * (1.5f - (number * 0.5f * t * t));
921 // DotProduct(avn,v) * t is dotproduct with a normalized v,
922 // the hardness variables are for backlighting/shinyness
923 f *= DotProduct(avn,v) * t * hardness + hardnessoffset;
925 VectorMA(color, f, nl->light, color);
930 VectorCopy(color, avc);
939 for (i = 0;i < numverts;i++)
941 VectorCopy(basecolor, avc);