gl_rsurf.c

   1 /*
   2 Copyright (C) 1996-1997 Id Software, Inc.
   3
   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.
   8
   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.
  12
  13 See the GNU General Public License for more details.
  14
  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.
  18
  19 */
  20 // r_surf.c: surface-related refresh code
  21
  22 #include "quakedef.h"
  23 #include "r_shadow.h"
  24 #include "portals.h"
  25
  26 #define MAX_LIGHTMAP_SIZE 256
  27
  28 cvar_t r_ambient = {0, "r_ambient", "0", "brightens map, value is 0-128"};
  29 cvar_t r_lockpvs = {0, "r_lockpvs", "0", "disables pvs switching, allows you to walk around and inspect what is visible from a given location in the map (anything not visible from your current location will not be drawn)"};
  30 cvar_t r_lockvisibility = {0, "r_lockvisibility", "0", "disables visibility updates, allows you to walk around and inspect what is visible from a given viewpoint in the map (anything offscreen at the moment this is enabled will not be drawn)"};
  31 cvar_t r_useportalculling = {0, "r_useportalculling", "1", "use advanced portal culling visibility method to improve performance over just Potentially Visible Set, provides an even more significant speed improvement in unvised maps"};
  32 cvar_t r_q3bsp_renderskydepth = {0, "r_q3bsp_renderskydepth", "0", "draws sky depth masking in q3 maps (as in q1 maps), this means for example that sky polygons can hide other things"};
  33
  34 /*
  35 ===============
  36 R_BuildLightMap
  37
  38 Combine and scale multiple lightmaps into the 8.8 format in blocklights
  39 ===============
  40 */
  41 void R_BuildLightMap (const entity_render_t *ent, msurface_t *surface)
  42 {
  43         int smax, tmax, i, size, size3, maps, l;
  44         int *bl, scale;
  45         unsigned char *lightmap, *out, *stain;
  46         model_t *model = ent->model;
  47         int *intblocklights;
  48         unsigned char *templight;
  49
  50         smax = (surface->lightmapinfo->extents[0]>>4)+1;
  51         tmax = (surface->lightmapinfo->extents[1]>>4)+1;
  52         size = smax*tmax;
  53         size3 = size*3;
  54
  55         r_refdef.stats.lightmapupdatepixels += size;
  56         r_refdef.stats.lightmapupdates++;
  57
  58         if (cl.buildlightmapmemorysize < size*sizeof(int[3]))
  59         {
  60                 cl.buildlightmapmemorysize = size*sizeof(int[3]);
  61                 if (cl.buildlightmapmemory)
  62                         Mem_Free(cl.buildlightmapmemory);
  63                 cl.buildlightmapmemory = Mem_Alloc(cls.levelmempool, cl.buildlightmapmemorysize);
  64         }
  65
  66         // these both point at the same buffer, templight is only used for final
  67         // processing and can replace the intblocklights data as it goes
  68         intblocklights = (int *)cl.buildlightmapmemory;
  69         templight = (unsigned char *)cl.buildlightmapmemory;
  70
  71         // update cached lighting info
  72         surface->cached_dlight = 0;
  73
  74         lightmap = surface->lightmapinfo->samples;
  75
  76 // set to full bright if no light data
  77         bl = intblocklights;
  78         if (!model->brushq1.lightdata)
  79         {
  80                 for (i = 0;i < size3;i++)
  81                         bl[i] = 128*256;
  82         }
  83         else
  84         {
  85 // clear to no light
  86                 memset(bl, 0, size3*sizeof(*bl));
  87
  88 // add all the lightmaps
  89                 if (lightmap)
  90                         for (maps = 0;maps < MAXLIGHTMAPS && surface->lightmapinfo->styles[maps] != 255;maps++, lightmap += size3)
  91                                 for (scale = r_refdef.scene.lightstylevalue[surface->lightmapinfo->styles[maps]], i = 0;i < size3;i++)
  92                                         bl[i] += lightmap[i] * scale;
  93         }
  94
  95         stain = surface->lightmapinfo->stainsamples;
  96         bl = intblocklights;
  97         out = templight;
  98         // the >> 16 shift adjusts down 8 bits to account for the stainmap
  99         // scaling, and remaps the 0-65536 (2x overbright) to 0-256, it will
 100         // be doubled during rendering to achieve 2x overbright
 101         // (0 = 0.0, 128 = 1.0, 256 = 2.0)
 102         for (i = 0;i < size;i++, bl += 3, stain += 3, out += 4)
 103         {
 104                 l = (bl[0] * stain[0]) >> 16;out[2] = min(l, 255);
 105                 l = (bl[1] * stain[1]) >> 16;out[1] = min(l, 255);
 106                 l = (bl[2] * stain[2]) >> 16;out[0] = min(l, 255);
 107                 out[3] = 255;
 108         }
 109
 110         R_UpdateTexture(surface->lightmaptexture, templight, surface->lightmapinfo->lightmaporigin[0], surface->lightmapinfo->lightmaporigin[1], smax, tmax);
 111
 112         // update the surface's deluxemap if it has one
 113         if (surface->deluxemaptexture != r_texture_blanknormalmap)
 114         {
 115                 vec3_t n;
 116                 unsigned char *normalmap = surface->lightmapinfo->nmapsamples;
 117                 lightmap = surface->lightmapinfo->samples;
 118                 // clear to no normalmap
 119                 bl = intblocklights;
 120                 memset(bl, 0, size3*sizeof(*bl));
 121                 // add all the normalmaps
 122                 if (lightmap && normalmap)
 123                 {
 124                         for (maps = 0;maps < MAXLIGHTMAPS && surface->lightmapinfo->styles[maps] != 255;maps++, lightmap += size3, normalmap += size3)
 125                         {
 126                                 for (scale = r_refdef.scene.lightstylevalue[surface->lightmapinfo->styles[maps]], i = 0;i < size;i++)
 127                                 {
 128                                         // add the normalmap with weighting proportional to the style's lightmap intensity
 129                                         l = (int)(VectorLength(lightmap + i*3) * scale);
 130                                         bl[i*3+0] += ((int)normalmap[i*3+0] - 128) * l;
 131                                         bl[i*3+1] += ((int)normalmap[i*3+1] - 128) * l;
 132                                         bl[i*3+2] += ((int)normalmap[i*3+2] - 128) * l;
 133                                 }
 134                         }
 135                 }
 136                 bl = intblocklights;
 137                 out = templight;
 138                 // we simply renormalize the weighted normals to get a valid deluxemap
 139                 for (i = 0;i < size;i++, bl += 3, out += 4)
 140                 {
 141                         VectorCopy(bl, n);
 142                         VectorNormalize(n);
 143                         l = (int)(n[0] * 128 + 128);out[2] = bound(0, l, 255);
 144                         l = (int)(n[1] * 128 + 128);out[1] = bound(0, l, 255);
 145                         l = (int)(n[2] * 128 + 128);out[0] = bound(0, l, 255);
 146                         out[3] = 255;
 147                 }
 148                 R_UpdateTexture(surface->deluxemaptexture, templight, surface->lightmapinfo->lightmaporigin[0], surface->lightmapinfo->lightmaporigin[1], smax, tmax);
 149         }
 150 }
 151
 152 void R_StainNode (mnode_t *node, model_t *model, const vec3_t origin, float radius, const float fcolor[8])
 153 {
 154         float ndist, a, ratio, maxdist, maxdist2, maxdist3, invradius, sdtable[256], td, dist2;
 155         msurface_t *surface, *endsurface;
 156         int i, s, t, smax, tmax, smax3, impacts, impactt, stained;
 157         unsigned char *bl;
 158         vec3_t impact;
 159
 160         maxdist = radius * radius;
 161         invradius = 1.0f / radius;
 162
 163 loc0:
 164         if (!node->plane)
 165                 return;
 166         ndist = PlaneDiff(origin, node->plane);
 167         if (ndist > radius)
 168         {
 169                 node = node->children[0];
 170                 goto loc0;
 171         }
 172         if (ndist < -radius)
 173         {
 174                 node = node->children[1];
 175                 goto loc0;
 176         }
 177
 178         dist2 = ndist * ndist;
 179         maxdist3 = maxdist - dist2;
 180
 181         if (node->plane->type < 3)
 182         {
 183                 VectorCopy(origin, impact);
 184                 impact[node->plane->type] -= ndist;
 185         }
 186         else
 187         {
 188                 impact[0] = origin[0] - node->plane->normal[0] * ndist;
 189                 impact[1] = origin[1] - node->plane->normal[1] * ndist;
 190                 impact[2] = origin[2] - node->plane->normal[2] * ndist;
 191         }
 192
 193         for (surface = model->data_surfaces + node->firstsurface, endsurface = surface + node->numsurfaces;surface < endsurface;surface++)
 194         {
 195                 if (surface->lightmapinfo->stainsamples)
 196                 {
 197                         smax = (surface->lightmapinfo->extents[0] >> 4) + 1;
 198                         tmax = (surface->lightmapinfo->extents[1] >> 4) + 1;
 199
 200                         impacts = (int)(DotProduct (impact, surface->lightmapinfo->texinfo->vecs[0]) + surface->lightmapinfo->texinfo->vecs[0][3] - surface->lightmapinfo->texturemins[0]);
 201                         impactt = (int)(DotProduct (impact, surface->lightmapinfo->texinfo->vecs[1]) + surface->lightmapinfo->texinfo->vecs[1][3] - surface->lightmapinfo->texturemins[1]);
 202
 203                         s = bound(0, impacts, smax * 16) - impacts;
 204                         t = bound(0, impactt, tmax * 16) - impactt;
 205                         i = (int)(s * s + t * t + dist2);
 206                         if (i > maxdist)
 207                                 continue;
 208
 209                         // reduce calculations
 210                         for (s = 0, i = impacts; s < smax; s++, i -= 16)
 211                                 sdtable[s] = i * i + dist2;
 212
 213                         bl = surface->lightmapinfo->stainsamples;
 214                         smax3 = smax * 3;
 215                         stained = false;
 216
 217                         i = impactt;
 218                         for (t = 0;t < tmax;t++, i -= 16)
 219                         {
 220                                 td = i * i;
 221                                 // make sure some part of it is visible on this line
 222                                 if (td < maxdist3)
 223                                 {
 224                                         maxdist2 = maxdist - td;
 225                                         for (s = 0;s < smax;s++)
 226                                         {
 227                                                 if (sdtable[s] < maxdist2)
 228                                                 {
 229                                                         ratio = lhrandom(0.0f, 1.0f);
 230                                                         a = (fcolor[3] + ratio * fcolor[7]) * (1.0f - sqrt(sdtable[s] + td) * invradius);
 231                                                         if (a >= (1.0f / 64.0f))
 232                                                         {
 233                                                                 if (a > 1)
 234                                                                         a = 1;
 235                                                                 bl[0] = (unsigned char) ((float) bl[0] + a * ((fcolor[0] + ratio * fcolor[4]) - (float) bl[0]));
 236                                                                 bl[1] = (unsigned char) ((float) bl[1] + a * ((fcolor[1] + ratio * fcolor[5]) - (float) bl[1]));
 237                                                                 bl[2] = (unsigned char) ((float) bl[2] + a * ((fcolor[2] + ratio * fcolor[6]) - (float) bl[2]));
 238                                                                 stained = true;
 239                                                         }
 240                                                 }
 241                                                 bl += 3;
 242                                         }
 243                                 }
 244                                 else // skip line
 245                                         bl += smax3;
 246                         }
 247                         // force lightmap upload
 248                         if (stained)
 249                                 surface->cached_dlight = true;
 250                 }
 251         }
 252
 253         if (node->children[0]->plane)
 254         {
 255                 if (node->children[1]->plane)
 256                 {
 257                         R_StainNode(node->children[0], model, origin, radius, fcolor);
 258                         node = node->children[1];
 259                         goto loc0;
 260                 }
 261                 else
 262                 {
 263                         node = node->children[0];
 264                         goto loc0;
 265                 }
 266         }
 267         else if (node->children[1]->plane)
 268         {
 269                 node = node->children[1];
 270                 goto loc0;
 271         }
 272 }
 273
 274 void R_Stain (const vec3_t origin, float radius, int cr1, int cg1, int cb1, int ca1, int cr2, int cg2, int cb2, int ca2)
 275 {
 276         int n;
 277         float fcolor[8];
 278         entity_render_t *ent;
 279         model_t *model;
 280         vec3_t org;
 281         if (r_refdef.scene.worldmodel == NULL || !r_refdef.scene.worldmodel->brush.data_nodes || !r_refdef.scene.worldmodel->brushq1.lightdata)
 282                 return;
 283         fcolor[0] = cr1;
 284         fcolor[1] = cg1;
 285         fcolor[2] = cb1;
 286         fcolor[3] = ca1 * (1.0f / 64.0f);
 287         fcolor[4] = cr2 - cr1;
 288         fcolor[5] = cg2 - cg1;
 289         fcolor[6] = cb2 - cb1;
 290         fcolor[7] = (ca2 - ca1) * (1.0f / 64.0f);
 291
 292         R_StainNode(r_refdef.scene.worldmodel->brush.data_nodes + r_refdef.scene.worldmodel->brushq1.hulls[0].firstclipnode, r_refdef.scene.worldmodel, origin, radius, fcolor);
 293
 294         // look for embedded bmodels
 295         for (n = 0;n < cl.num_brushmodel_entities;n++)
 296         {
 297                 ent = &cl.entities[cl.brushmodel_entities[n]].render;
 298                 model = ent->model;
 299                 if (model && model->name[0] == '*')
 300                 {
 301                         if (model->brush.data_nodes)
 302                         {
 303                                 Matrix4x4_Transform(&ent->inversematrix, origin, org);
 304                                 R_StainNode(model->brush.data_nodes + model->brushq1.hulls[0].firstclipnode, model, org, radius, fcolor);
 305                         }
 306                 }
 307         }
 308 }
 309
 310
 311 /*
 312 =============================================================
 313
 314         BRUSH MODELS
 315
 316 =============================================================
 317 */
 318
 319 static void R_DrawPortal_Callback(const entity_render_t *ent, const rtlight_t *rtlight, int numsurfaces, int *surfacelist)
 320 {
 321         // due to the hacky nature of this function's parameters, this is never
 322         // called with a batch, so numsurfaces is always 1, and the surfacelist
 323         // contains only a leaf number for coloring purposes
 324         const mportal_t *portal = (mportal_t *)ent;
 325         int i, numpoints;
 326         float *v;
 327         float vertex3f[POLYGONELEMENTS_MAXPOINTS*3];
 328         CHECKGLERROR
 329         GL_BlendFunc(GL_SRC_ALPHA, GL_ONE_MINUS_SRC_ALPHA);
 330         GL_DepthMask(false);
 331         GL_DepthRange(0, 1);
 332         GL_PolygonOffset(r_refdef.polygonfactor, r_refdef.polygonoffset);
 333         GL_DepthTest(true);
 334         GL_CullFace(GL_NONE);
 335         R_Mesh_Matrix(&identitymatrix);
 336
 337         numpoints = min(portal->numpoints, POLYGONELEMENTS_MAXPOINTS);
 338
 339         R_Mesh_VertexPointer(vertex3f, 0, 0);
 340         R_Mesh_ColorPointer(NULL, 0, 0);
 341         R_Mesh_ResetTextureState();
 342
 343         i = surfacelist[0];
 344         GL_Color(((i & 0x0007) >> 0) * (1.0f / 7.0f) * r_refdef.view.colorscale,
 345                          ((i & 0x0038) >> 3) * (1.0f / 7.0f) * r_refdef.view.colorscale,
 346                          ((i & 0x01C0) >> 6) * (1.0f / 7.0f) * r_refdef.view.colorscale,
 347                          0.125f);
 348         for (i = 0, v = vertex3f;i < numpoints;i++, v += 3)
 349                 VectorCopy(portal->points[i].position, v);
 350         R_Mesh_Draw(0, numpoints, numpoints - 2, polygonelements, 0, 0);
 351 }
 352
 353 // LordHavoc: this is just a nice debugging tool, very slow
 354 void R_DrawPortals(void)
 355 {
 356         int i, leafnum;
 357         mportal_t *portal;
 358         float center[3], f;
 359         model_t *model = r_refdef.scene.worldmodel;
 360         if (model == NULL)
 361                 return;
 362         for (leafnum = 0;leafnum < r_refdef.scene.worldmodel->brush.num_leafs;leafnum++)
 363         {
 364                 if (r_refdef.viewcache.world_leafvisible[leafnum])
 365                 {
 366                         //for (portalnum = 0, portal = model->brush.data_portals;portalnum < model->brush.num_portals;portalnum++, portal++)
 367                         for (portal = r_refdef.scene.worldmodel->brush.data_leafs[leafnum].portals;portal;portal = portal->next)
 368                         {
 369                                 if (portal->numpoints <= POLYGONELEMENTS_MAXPOINTS)
 370                                 if (!R_CullBox(portal->mins, portal->maxs))
 371                                 {
 372                                         VectorClear(center);
 373                                         for (i = 0;i < portal->numpoints;i++)
 374                                                 VectorAdd(center, portal->points[i].position, center);
 375                                         f = ixtable[portal->numpoints];
 376                                         VectorScale(center, f, center);
 377                                         R_MeshQueue_AddTransparent(center, R_DrawPortal_Callback, (entity_render_t *)portal, leafnum, rsurface.rtlight);
 378                                 }
 379                         }
 380                 }
 381         }
 382 }
 383
 384 void R_View_WorldVisibility(qboolean forcenovis)
 385 {
 386         int i, j, *mark;
 387         mleaf_t *leaf;
 388         mleaf_t *viewleaf;
 389         model_t *model = r_refdef.scene.worldmodel;
 390
 391         if (!model)
 392                 return;
 393
 394         if (r_refdef.view.usecustompvs)
 395         {
 396                 // clear the visible surface and leaf flags arrays
 397                 memset(r_refdef.viewcache.world_surfacevisible, 0, model->num_surfaces);
 398                 memset(r_refdef.viewcache.world_leafvisible, 0, model->brush.num_leafs);
 399                 r_refdef.viewcache.world_novis = false;
 400
 401                 // simply cull each marked leaf to the frustum (view pyramid)
 402                 for (j = 0, leaf = model->brush.data_leafs;j < model->brush.num_leafs;j++, leaf++)
 403                 {
 404                         // if leaf is in current pvs and on the screen, mark its surfaces
 405                         if (CHECKPVSBIT(r_refdef.viewcache.world_pvsbits, leaf->clusterindex) && !R_CullBox(leaf->mins, leaf->maxs))
 406                         {
 407                                 r_refdef.stats.world_leafs++;
 408                                 r_refdef.viewcache.world_leafvisible[j] = true;
 409                                 if (leaf->numleafsurfaces)
 410                                         for (i = 0, mark = leaf->firstleafsurface;i < leaf->numleafsurfaces;i++, mark++)
 411                                                 r_refdef.viewcache.world_surfacevisible[*mark] = true;
 412                         }
 413                 }
 414                 return;
 415         }
 416
 417         // if possible find the leaf the view origin is in
 418         viewleaf = model->brush.PointInLeaf ? model->brush.PointInLeaf(model, r_refdef.view.origin) : NULL;
 419         // if possible fetch the visible cluster bits
 420         if (!r_lockpvs.integer && model->brush.FatPVS)
 421                 model->brush.FatPVS(model, r_refdef.view.origin, 2, r_refdef.viewcache.world_pvsbits, sizeof(r_refdef.viewcache.world_pvsbits), false);
 422
 423         if (!r_lockvisibility.integer)
 424         {
 425                 // clear the visible surface and leaf flags arrays
 426                 memset(r_refdef.viewcache.world_surfacevisible, 0, model->num_surfaces);
 427                 memset(r_refdef.viewcache.world_leafvisible, 0, model->brush.num_leafs);
 428
 429                 r_refdef.viewcache.world_novis = false;
 430
 431                 // if floating around in the void (no pvs data available, and no
 432                 // portals available), simply use all on-screen leafs.
 433                 if (!viewleaf || viewleaf->clusterindex < 0 || forcenovis)
 434                 {
 435                         // no visibility method: (used when floating around in the void)
 436                         // simply cull each leaf to the frustum (view pyramid)
 437                         // similar to quake's RecursiveWorldNode but without cache misses
 438                         r_refdef.viewcache.world_novis = true;
 439                         for (j = 0, leaf = model->brush.data_leafs;j < model->brush.num_leafs;j++, leaf++)
 440                         {
 441                                 // if leaf is in current pvs and on the screen, mark its surfaces
 442                                 if (!R_CullBox(leaf->mins, leaf->maxs))
 443                                 {
 444                                         r_refdef.stats.world_leafs++;
 445                                         r_refdef.viewcache.world_leafvisible[j] = true;
 446                                         if (leaf->numleafsurfaces)
 447                                                 for (i = 0, mark = leaf->firstleafsurface;i < leaf->numleafsurfaces;i++, mark++)
 448                                                         r_refdef.viewcache.world_surfacevisible[*mark] = true;
 449                                 }
 450                         }
 451                 }
 452                 // if the user prefers to disable portal culling (testing?), simply
 453                 // use all on-screen leafs that are in the pvs.
 454                 else if (!r_useportalculling.integer)
 455                 {
 456                         // pvs method:
 457                         // simply check if each leaf is in the Potentially Visible Set,
 458                         // and cull to frustum (view pyramid)
 459                         // similar to quake's RecursiveWorldNode but without cache misses
 460                         for (j = 0, leaf = model->brush.data_leafs;j < model->brush.num_leafs;j++, leaf++)
 461                         {
 462                                 // if leaf is in current pvs and on the screen, mark its surfaces
 463                                 if (CHECKPVSBIT(r_refdef.viewcache.world_pvsbits, leaf->clusterindex) && !R_CullBox(leaf->mins, leaf->maxs))
 464                                 {
 465                                         r_refdef.stats.world_leafs++;
 466                                         r_refdef.viewcache.world_leafvisible[j] = true;
 467                                         if (leaf->numleafsurfaces)
 468                                                 for (i = 0, mark = leaf->firstleafsurface;i < leaf->numleafsurfaces;i++, mark++)
 469                                                         r_refdef.viewcache.world_surfacevisible[*mark] = true;
 470                                 }
 471                         }
 472                 }
 473                 // otherwise use a recursive portal flow, culling each portal to
 474                 // frustum and checking if the leaf the portal leads to is in the pvs
 475                 else
 476                 {
 477                         int leafstackpos;
 478                         mportal_t *p;
 479                         mleaf_t *leafstack[8192];
 480                         // simple-frustum portal method:
 481                         // follows portals leading outward from viewleaf, does not venture
 482                         // offscreen or into leafs that are not visible, faster than
 483                         // Quake's RecursiveWorldNode and vastly better in unvised maps,
 484                         // often culls some surfaces that pvs alone would miss
 485                         // (such as a room in pvs that is hidden behind a wall, but the
 486                         //  passage leading to the room is off-screen)
 487                         leafstack[0] = viewleaf;
 488                         leafstackpos = 1;
 489                         while (leafstackpos)
 490                         {
 491                                 leaf = leafstack[--leafstackpos];
 492                                 if (r_refdef.viewcache.world_leafvisible[leaf - model->brush.data_leafs])
 493                                         continue;
 494                                 r_refdef.stats.world_leafs++;
 495                                 r_refdef.viewcache.world_leafvisible[leaf - model->brush.data_leafs] = true;
 496                                 // mark any surfaces bounding this leaf
 497                                 if (leaf->numleafsurfaces)
 498                                         for (i = 0, mark = leaf->firstleafsurface;i < leaf->numleafsurfaces;i++, mark++)
 499                                                 r_refdef.viewcache.world_surfacevisible[*mark] = true;
 500                                 // follow portals into other leafs
 501                                 // the checks are:
 502                                 // if viewer is behind portal (portal faces outward into the scene)
 503                                 // and the portal polygon's bounding box is on the screen
 504                                 // and the leaf has not been visited yet
 505                                 // and the leaf is visible in the pvs
 506                                 // (the first two checks won't cause as many cache misses as the leaf checks)
 507                                 for (p = leaf->portals;p;p = p->next)
 508                                 {
 509                                         r_refdef.stats.world_portals++;
 510                                         if (DotProduct(r_refdef.view.origin, p->plane.normal) < (p->plane.dist + 1)
 511                                          && !r_refdef.viewcache.world_leafvisible[p->past - model->brush.data_leafs]
 512                                          && CHECKPVSBIT(r_refdef.viewcache.world_pvsbits, p->past->clusterindex)
 513                                          && !R_CullBox(p->mins, p->maxs)
 514                                          && leafstackpos < (int)(sizeof(leafstack) / sizeof(leafstack[0])))
 515                                                 leafstack[leafstackpos++] = p->past;
 516                                 }
 517                         }
 518                 }
 519         }
 520 }
 521
 522 void R_Q1BSP_DrawSky(entity_render_t *ent)
 523 {
 524         if (ent->model == NULL)
 525                 return;
 526         if (ent == r_refdef.scene.worldentity)
 527                 R_DrawWorldSurfaces(true, true, false, false, false);
 528         else
 529                 R_DrawModelSurfaces(ent, true, true, false, false, false);
 530 }
 531
 532 void R_Q1BSP_DrawAddWaterPlanes(entity_render_t *ent)
 533 {
 534         model_t *model = ent->model;
 535         if (model == NULL)
 536                 return;
 537         if (ent == r_refdef.scene.worldentity)
 538                 R_DrawWorldSurfaces(false, false, false, true, false);
 539         else
 540                 R_DrawModelSurfaces(ent, false, false, false, true, false);
 541 }
 542
 543 void R_Q1BSP_Draw(entity_render_t *ent)
 544 {
 545         model_t *model = ent->model;
 546         if (model == NULL)
 547                 return;
 548         if (ent == r_refdef.scene.worldentity)
 549                 R_DrawWorldSurfaces(false, true, false, false, false);
 550         else
 551                 R_DrawModelSurfaces(ent, false, true, false, false, false);
 552 }
 553
 554 void R_Q1BSP_DrawDepth(entity_render_t *ent)
 555 {
 556         model_t *model = ent->model;
 557         if (model == NULL)
 558                 return;
 559         if (ent == r_refdef.scene.worldentity)
 560                 R_DrawWorldSurfaces(false, false, true, false, false);
 561         else
 562                 R_DrawModelSurfaces(ent, false, false, true, false, false);
 563 }
 564
 565 void R_Q1BSP_DrawDebug(entity_render_t *ent)
 566 {
 567         if (ent->model == NULL)
 568                 return;
 569         if (ent == r_refdef.scene.worldentity)
 570                 R_DrawWorldSurfaces(false, false, false, false, true);
 571         else
 572                 R_DrawModelSurfaces(ent, false, false, false, false, true);
 573 }
 574
 575 typedef struct r_q1bsp_getlightinfo_s
 576 {
 577         model_t *model;
 578         vec3_t relativelightorigin;
 579         float lightradius;
 580         int *outleaflist;
 581         unsigned char *outleafpvs;
 582         int outnumleafs;
 583         int *outsurfacelist;
 584         unsigned char *outsurfacepvs;
 585         unsigned char *tempsurfacepvs;
 586         unsigned char *outshadowtrispvs;
 587         unsigned char *outlighttrispvs;
 588         int outnumsurfaces;
 589         vec3_t outmins;
 590         vec3_t outmaxs;
 591         vec3_t lightmins;
 592         vec3_t lightmaxs;
 593         const unsigned char *pvs;
 594         qboolean svbsp_active;
 595         qboolean svbsp_insertoccluder;
 596 }
 597 r_q1bsp_getlightinfo_t;
 598
 599 void R_Q1BSP_RecursiveGetLightInfo(r_q1bsp_getlightinfo_t *info, mnode_t *node)
 600 {
 601         int sides;
 602         mleaf_t *leaf;
 603         for (;;)
 604         {
 605                 mplane_t *plane = node->plane;
 606                 //if (!BoxesOverlap(info->lightmins, info->lightmaxs, node->mins, node->maxs))
 607                 //      return;
 608                 if (!plane)
 609                         break;
 610                 //if (!r_shadow_compilingrtlight && R_CullBoxCustomPlanes(node->mins, node->maxs, rsurface.rtlight_numfrustumplanes, rsurface.rtlight_frustumplanes))
 611                 //      return;
 612                 if (plane->type < 3)
 613                 {
 614                         if (info->lightmins[plane->type] > plane->dist)
 615                                 node = node->children[0];
 616                         else if (info->lightmaxs[plane->type] < plane->dist)
 617                                 node = node->children[1];
 618                         else if (info->relativelightorigin[plane->type] >= plane->dist)
 619                         {
 620                                 R_Q1BSP_RecursiveGetLightInfo(info, node->children[0]);
 621                                 node = node->children[1];
 622                         }
 623                         else
 624                         {
 625                                 R_Q1BSP_RecursiveGetLightInfo(info, node->children[1]);
 626                                 node = node->children[0];
 627                         }
 628                 }
 629                 else
 630                 {
 631                         sides = BoxOnPlaneSide(info->lightmins, info->lightmaxs, plane);
 632                         if (sides == 3)
 633                         {
 634                                 // recurse front side first because the svbsp building prefers it
 635                                 if (PlaneDist(info->relativelightorigin, plane) >= 0)
 636                                 {
 637                                         R_Q1BSP_RecursiveGetLightInfo(info, node->children[0]);
 638                                         node = node->children[1];
 639                                 }
 640                                 else
 641                                 {
 642                                         R_Q1BSP_RecursiveGetLightInfo(info, node->children[1]);
 643                                         node = node->children[0];
 644                                 }
 645                         }
 646                         else if (sides == 0)
 647                                 return; // ERROR: NAN bounding box!
 648                         else
 649                                 node = node->children[sides - 1];
 650                 }
 651         }
 652         if (!r_shadow_compilingrtlight && R_CullBoxCustomPlanes(node->mins, node->maxs, rsurface.rtlight_numfrustumplanes, rsurface.rtlight_frustumplanes))
 653                 return;
 654         leaf = (mleaf_t *)node;
 655         if (info->svbsp_active)
 656         {
 657                 int i;
 658                 mportal_t *portal;
 659                 double points[128][3];
 660                 for (portal = leaf->portals;portal;portal = portal->next)
 661                 {
 662                         for (i = 0;i < portal->numpoints;i++)
 663                                 VectorCopy(portal->points[i].position, points[i]);
 664                         if (SVBSP_AddPolygon(&r_svbsp, portal->numpoints, points[0], false, NULL, NULL, 0) & 2)
 665                                 break;
 666                 }
 667                 if (portal == NULL)
 668                         return; // no portals of this leaf visible
 669         }
 670         else
 671         {
 672                 if (r_shadow_frontsidecasting.integer && info->pvs != NULL && !CHECKPVSBIT(info->pvs, leaf->clusterindex))
 673                         return;
 674         }
 675         // inserting occluders does not alter the leaf info
 676         if (!info->svbsp_insertoccluder)
 677         {
 678                 info->outmins[0] = min(info->outmins[0], leaf->mins[0]);
 679                 info->outmins[1] = min(info->outmins[1], leaf->mins[1]);
 680                 info->outmins[2] = min(info->outmins[2], leaf->mins[2]);
 681                 info->outmaxs[0] = max(info->outmaxs[0], leaf->maxs[0]);
 682                 info->outmaxs[1] = max(info->outmaxs[1], leaf->maxs[1]);
 683                 info->outmaxs[2] = max(info->outmaxs[2], leaf->maxs[2]);
 684                 if (info->outleafpvs)
 685                 {
 686                         int leafindex = leaf - info->model->brush.data_leafs;
 687                         if (!CHECKPVSBIT(info->outleafpvs, leafindex))
 688                         {
 689                                 SETPVSBIT(info->outleafpvs, leafindex);
 690                                 info->outleaflist[info->outnumleafs++] = leafindex;
 691                         }
 692                 }
 693         }
 694         if (info->outsurfacepvs)
 695         {
 696                 int leafsurfaceindex;
 697                 int surfaceindex;
 698                 int triangleindex, t;
 699                 msurface_t *surface;
 700                 const int *e;
 701                 const vec_t *v[3];
 702                 double v2[3][3];
 703                 for (leafsurfaceindex = 0;leafsurfaceindex < leaf->numleafsurfaces;leafsurfaceindex++)
 704                 {
 705                         surfaceindex = leaf->firstleafsurface[leafsurfaceindex];
 706                         if (!CHECKPVSBIT(info->outsurfacepvs, surfaceindex))
 707                         {
 708                                 surface = info->model->data_surfaces + surfaceindex;
 709                                 if (BoxesOverlap(info->lightmins, info->lightmaxs, surface->mins, surface->maxs)
 710                                  && (!info->svbsp_insertoccluder || !(surface->texture->currentframe->currentmaterialflags & MATERIALFLAG_NOSHADOW)))
 711                                 {
 712                                         qboolean addedtris = false;
 713                                         qboolean insidebox = BoxInsideBox(surface->mins, surface->maxs, info->lightmins, info->lightmaxs);
 714                                         for (triangleindex = 0, t = surface->num_firstshadowmeshtriangle, e = info->model->brush.shadowmesh->element3i + t * 3;triangleindex < surface->num_triangles;triangleindex++, t++, e += 3)
 715                                         {
 716                                                 v[0] = info->model->brush.shadowmesh->vertex3f + e[0] * 3;
 717                                                 v[1] = info->model->brush.shadowmesh->vertex3f + e[1] * 3;
 718                                                 v[2] = info->model->brush.shadowmesh->vertex3f + e[2] * 3;
 719                                                 if (insidebox || TriangleOverlapsBox(v[0], v[1], v[2], info->lightmins, info->lightmaxs))
 720                                                 {
 721                                                         if (info->svbsp_insertoccluder)
 722                                                         {
 723                                                                 if (!(surface->texture->currentframe->currentmaterialflags & MATERIALFLAG_NOCULLFACE) && r_shadow_frontsidecasting.integer != PointInfrontOfTriangle(info->relativelightorigin, v[0], v[1], v[2]))
 724                                                                         continue;
 725                                                                 if (surface->texture->currentframe->currentmaterialflags & MATERIALFLAG_NOSHADOW)
 726                                                                         continue;
 727                                                                 VectorCopy(v[0], v2[0]);
 728                                                                 VectorCopy(v[1], v2[1]);
 729                                                                 VectorCopy(v[2], v2[2]);
 730                                                                 if (!(SVBSP_AddPolygon(&r_svbsp, 3, v2[0], true, NULL, NULL, 0) & 2))
 731                                                                         continue;
 732                                                                 addedtris = true;
 733                                                         }
 734                                                         else
 735                                                         {
 736                                                                 if (info->svbsp_active)
 737                                                                 {
 738                                                                         VectorCopy(v[0], v2[0]);
 739                                                                         VectorCopy(v[1], v2[1]);
 740                                                                         VectorCopy(v[2], v2[2]);
 741                                                                         if (!(SVBSP_AddPolygon(&r_svbsp, 3, v2[0], false, NULL, NULL, 0) & 2))
 742                                                                                 continue;
 743                                                                 }
 744                                                                 if (surface->texture->currentframe->currentmaterialflags & MATERIALFLAG_NOCULLFACE)
 745                                                                 {
 746                                                                         // if the material is double sided we
 747                                                                         // can't cull by direction
 748                                                                         SETPVSBIT(info->outlighttrispvs, t);
 749                                                                         addedtris = true;
 750                                                                         if (!(surface->texture->currentframe->currentmaterialflags & MATERIALFLAG_NOSHADOW))
 751                                                                                 SETPVSBIT(info->outshadowtrispvs, t);
 752                                                                 }
 753                                                                 else if (r_shadow_frontsidecasting.integer)
 754                                                                 {
 755                                                                         // front side casting occludes backfaces,
 756                                                                         // so they are completely useless as both
 757                                                                         // casters and lit polygons
 758                                                                         if (!PointInfrontOfTriangle(info->relativelightorigin, v[0], v[1], v[2]))
 759                                                                                 continue;
 760                                                                         SETPVSBIT(info->outlighttrispvs, t);
 761                                                                         addedtris = true;
 762                                                                         if (!(surface->texture->currentframe->currentmaterialflags & MATERIALFLAG_NOSHADOW))
 763                                                                                 SETPVSBIT(info->outshadowtrispvs, t);
 764                                                                 }
 765                                                                 else
 766                                                                 {
 767                                                                         // back side casting does not occlude
 768                                                                         // anything so we can't cull lit polygons
 769                                                                         SETPVSBIT(info->outlighttrispvs, t);
 770                                                                         addedtris = true;
 771                                                                         if (!PointInfrontOfTriangle(info->relativelightorigin, v[0], v[1], v[2]) && !(surface->texture->currentframe->currentmaterialflags & MATERIALFLAG_NOSHADOW))
 772                                                                                 SETPVSBIT(info->outshadowtrispvs, t);
 773                                                                 }
 774                                                         }
 775                                                 }
 776                                         }
 777                                         if (addedtris)
 778                                         {
 779                                                 SETPVSBIT(info->outsurfacepvs, surfaceindex);
 780                                                 info->outsurfacelist[info->outnumsurfaces++] = surfaceindex;
 781                                         }
 782                                 }
 783                         }
 784                 }
 785         }
 786 }
 787
 788 void R_Q1BSP_CallRecursiveGetLightInfo(r_q1bsp_getlightinfo_t *info, qboolean use_svbsp)
 789 {
 790         if (use_svbsp)
 791         {
 792                 double origin[3];
 793                 VectorCopy(info->relativelightorigin, origin);
 794                 if (!r_svbsp.nodes)
 795                 {
 796                         r_svbsp.maxnodes = max(r_svbsp.maxnodes, 1<<18);
 797                         r_svbsp.nodes = Mem_Alloc(r_main_mempool, r_svbsp.maxnodes * sizeof(svbsp_node_t));
 798                 }
 799                 info->svbsp_active = true;
 800                 info->svbsp_insertoccluder = true;
 801                 for (;;)
 802                 {
 803                         SVBSP_Init(&r_svbsp, origin, r_svbsp.maxnodes, r_svbsp.nodes);
 804                         R_Q1BSP_RecursiveGetLightInfo(info, info->model->brush.data_nodes);
 805                         // if that failed, retry with more nodes
 806                         if (r_svbsp.ranoutofnodes)
 807                         {
 808                                 // an upper limit is imposed
 809                                 if (r_svbsp.maxnodes >= 2<<22)
 810                                         break;
 811                                 Mem_Free(r_svbsp.nodes);
 812                                 r_svbsp.maxnodes *= 2;
 813                                 r_svbsp.nodes = Mem_Alloc(tempmempool, r_svbsp.maxnodes * sizeof(svbsp_node_t));
 814                         }
 815                         else
 816                                 break;
 817                 }
 818                 // now clear the surfacepvs array because we need to redo it
 819                 memset(info->outsurfacepvs, 0, (info->model->nummodelsurfaces + 7) >> 3);
 820                 info->outnumsurfaces = 0;
 821         }
 822         else
 823                 info->svbsp_active = false;
 824
 825         // we HAVE to mark the leaf the light is in as lit, because portals are
 826         // irrelevant to a leaf that the light source is inside of
 827         // (and they are all facing away, too)
 828         {
 829                 mnode_t *node = info->model->brush.data_nodes;
 830                 mleaf_t *leaf;
 831                 while (node->plane)
 832                         node = node->children[(node->plane->type < 3 ? info->relativelightorigin[node->plane->type] : DotProduct(info->relativelightorigin,node->plane->normal)) < node->plane->dist];
 833                 leaf = (mleaf_t *)node;
 834                 info->outmins[0] = min(info->outmins[0], leaf->mins[0]);
 835                 info->outmins[1] = min(info->outmins[1], leaf->mins[1]);
 836                 info->outmins[2] = min(info->outmins[2], leaf->mins[2]);
 837                 info->outmaxs[0] = max(info->outmaxs[0], leaf->maxs[0]);
 838                 info->outmaxs[1] = max(info->outmaxs[1], leaf->maxs[1]);
 839                 info->outmaxs[2] = max(info->outmaxs[2], leaf->maxs[2]);
 840                 if (info->outleafpvs)
 841                 {
 842                         int leafindex = leaf - info->model->brush.data_leafs;
 843                         if (!CHECKPVSBIT(info->outleafpvs, leafindex))
 844                         {
 845                                 SETPVSBIT(info->outleafpvs, leafindex);
 846                                 info->outleaflist[info->outnumleafs++] = leafindex;
 847                         }
 848                 }
 849         }
 850
 851         info->svbsp_insertoccluder = false;
 852         R_Q1BSP_RecursiveGetLightInfo(info, info->model->brush.data_nodes);
 853         if (developer.integer >= 100 && use_svbsp)
 854         {
 855                 Con_Printf("GetLightInfo: svbsp built with %i nodes, polygon stats:\n", r_svbsp.numnodes);
 856                 Con_Printf("occluders: %i accepted, %i rejected, %i fragments accepted, %i fragments rejected.\n", r_svbsp.stat_occluders_accepted, r_svbsp.stat_occluders_rejected, r_svbsp.stat_occluders_fragments_accepted, r_svbsp.stat_occluders_fragments_rejected);
 857                 Con_Printf("queries  : %i accepted, %i rejected, %i fragments accepted, %i fragments rejected.\n", r_svbsp.stat_queries_accepted, r_svbsp.stat_queries_rejected, r_svbsp.stat_queries_fragments_accepted, r_svbsp.stat_queries_fragments_rejected);
 858         }
 859 }
 860
 861 void R_Q1BSP_GetLightInfo(entity_render_t *ent, vec3_t relativelightorigin, float lightradius, vec3_t outmins, vec3_t outmaxs, int *outleaflist, unsigned char *outleafpvs, int *outnumleafspointer, int *outsurfacelist, unsigned char *outsurfacepvs, int *outnumsurfacespointer, unsigned char *outshadowtrispvs, unsigned char *outlighttrispvs)
 862 {
 863         r_q1bsp_getlightinfo_t info;
 864         VectorCopy(relativelightorigin, info.relativelightorigin);
 865         info.lightradius = lightradius;
 866         info.lightmins[0] = info.relativelightorigin[0] - info.lightradius;
 867         info.lightmins[1] = info.relativelightorigin[1] - info.lightradius;
 868         info.lightmins[2] = info.relativelightorigin[2] - info.lightradius;
 869         info.lightmaxs[0] = info.relativelightorigin[0] + info.lightradius;
 870         info.lightmaxs[1] = info.relativelightorigin[1] + info.lightradius;
 871         info.lightmaxs[2] = info.relativelightorigin[2] + info.lightradius;
 872         if (ent->model == NULL)
 873         {
 874                 VectorCopy(info.lightmins, outmins);
 875                 VectorCopy(info.lightmaxs, outmaxs);
 876                 *outnumleafspointer = 0;
 877                 *outnumsurfacespointer = 0;
 878                 return;
 879         }
 880         info.model = ent->model;
 881         info.outleaflist = outleaflist;
 882         info.outleafpvs = outleafpvs;
 883         info.outnumleafs = 0;
 884         info.outsurfacelist = outsurfacelist;
 885         info.outsurfacepvs = outsurfacepvs;
 886         info.outshadowtrispvs = outshadowtrispvs;
 887         info.outlighttrispvs = outlighttrispvs;
 888         info.outnumsurfaces = 0;
 889         VectorCopy(info.relativelightorigin, info.outmins);
 890         VectorCopy(info.relativelightorigin, info.outmaxs);
 891         memset(outleafpvs, 0, (info.model->brush.num_leafs + 7) >> 3);
 892         memset(outsurfacepvs, 0, (info.model->nummodelsurfaces + 7) >> 3);
 893         if (info.model->brush.shadowmesh)
 894                 memset(outshadowtrispvs, 0, (info.model->brush.shadowmesh->numtriangles + 7) >> 3);
 895         else
 896                 memset(outshadowtrispvs, 0, (info.model->surfmesh.num_triangles + 7) >> 3);
 897         memset(outlighttrispvs, 0, (info.model->surfmesh.num_triangles + 7) >> 3);
 898         if (info.model->brush.GetPVS && r_shadow_frontsidecasting.integer)
 899                 info.pvs = info.model->brush.GetPVS(info.model, info.relativelightorigin);
 900         else
 901                 info.pvs = NULL;
 902         R_UpdateAllTextureInfo(ent);
 903
 904         if (r_shadow_frontsidecasting.integer && r_shadow_compilingrtlight && r_shadow_realtime_world_compileportalculling.integer)
 905         {
 906                 // use portal recursion for exact light volume culling, and exact surface checking
 907                 Portal_Visibility(info.model, info.relativelightorigin, info.outleaflist, info.outleafpvs, &info.outnumleafs, info.outsurfacelist, info.outsurfacepvs, &info.outnumsurfaces, NULL, 0, true, info.lightmins, info.lightmaxs, info.outmins, info.outmaxs, info.outshadowtrispvs, info.outlighttrispvs);
 908         }
 909         else if (r_shadow_frontsidecasting.integer && r_shadow_realtime_dlight_portalculling.integer)
 910         {
 911                 // use portal recursion for exact light volume culling, but not the expensive exact surface checking
 912                 Portal_Visibility(info.model, info.relativelightorigin, info.outleaflist, info.outleafpvs, &info.outnumleafs, info.outsurfacelist, info.outsurfacepvs, &info.outnumsurfaces, NULL, 0, r_shadow_realtime_dlight_portalculling.integer >= 2, info.lightmins, info.lightmaxs, info.outmins, info.outmaxs, info.outshadowtrispvs, info.outlighttrispvs);
 913         }
 914         else
 915         {
 916                 // recurse the bsp tree, checking leafs and surfaces for visibility
 917                 // optionally using svbsp for exact culling of compiled lights
 918                 // (or if the user enables dlight svbsp culling, which is mostly for
 919                 //  debugging not actual use)
 920                 R_Q1BSP_CallRecursiveGetLightInfo(&info, r_shadow_compilingrtlight ? r_shadow_realtime_world_compilesvbsp.integer : r_shadow_realtime_dlight_svbspculling.integer);
 921         }
 922
 923         // limit combined leaf box to light boundaries
 924         outmins[0] = max(info.outmins[0] - 1, info.lightmins[0]);
 925         outmins[1] = max(info.outmins[1] - 1, info.lightmins[1]);
 926         outmins[2] = max(info.outmins[2] - 1, info.lightmins[2]);
 927         outmaxs[0] = min(info.outmaxs[0] + 1, info.lightmaxs[0]);
 928         outmaxs[1] = min(info.outmaxs[1] + 1, info.lightmaxs[1]);
 929         outmaxs[2] = min(info.outmaxs[2] + 1, info.lightmaxs[2]);
 930
 931         *outnumleafspointer = info.outnumleafs;
 932         *outnumsurfacespointer = info.outnumsurfaces;
 933 }
 934
 935 void R_Q1BSP_CompileShadowVolume(entity_render_t *ent, vec3_t relativelightorigin, vec3_t relativelightdirection, float lightradius, int numsurfaces, const int *surfacelist)
 936 {
 937         model_t *model = ent->model;
 938         msurface_t *surface;
 939         int surfacelistindex;
 940         float projectdistance = relativelightdirection ? lightradius : lightradius + model->radius*2 + r_shadow_projectdistance.value;
 941         r_shadow_compilingrtlight->static_meshchain_shadow = Mod_ShadowMesh_Begin(r_main_mempool, 32768, 32768, NULL, NULL, NULL, false, false, true);
 942         R_Shadow_PrepareShadowMark(model->brush.shadowmesh->numtriangles);
 943         for (surfacelistindex = 0;surfacelistindex < numsurfaces;surfacelistindex++)
 944         {
 945                 surface = model->data_surfaces + surfacelist[surfacelistindex];
 946                 if (surface->texture->currentframe->basematerialflags & MATERIALFLAG_NOSHADOW)
 947                         continue;
 948                 R_Shadow_MarkVolumeFromBox(surface->num_firstshadowmeshtriangle, surface->num_triangles, model->brush.shadowmesh->vertex3f, model->brush.shadowmesh->element3i, relativelightorigin, relativelightdirection, r_shadow_compilingrtlight->cullmins, r_shadow_compilingrtlight->cullmaxs, surface->mins, surface->maxs);
 949         }
 950         R_Shadow_VolumeFromList(model->brush.shadowmesh->numverts, model->brush.shadowmesh->numtriangles, model->brush.shadowmesh->vertex3f, model->brush.shadowmesh->element3i, model->brush.shadowmesh->neighbor3i, relativelightorigin, relativelightdirection, projectdistance, numshadowmark, shadowmarklist);
 951         r_shadow_compilingrtlight->static_meshchain_shadow = Mod_ShadowMesh_Finish(r_main_mempool, r_shadow_compilingrtlight->static_meshchain_shadow, false, false, true);
 952 }
 953
 954 extern cvar_t r_polygonoffset_submodel_factor;
 955 extern cvar_t r_polygonoffset_submodel_offset;
 956 void R_Q1BSP_DrawShadowVolume(entity_render_t *ent, vec3_t relativelightorigin, vec3_t relativelightdirection, float lightradius, int modelnumsurfaces, const int *modelsurfacelist, const vec3_t lightmins, const vec3_t lightmaxs)
 957 {
 958         model_t *model = ent->model;
 959         msurface_t *surface;
 960         int modelsurfacelistindex;
 961         float projectdistance = relativelightdirection ? lightradius : lightradius + model->radius*2 + r_shadow_projectdistance.value;
 962         // check the box in modelspace, it was already checked in worldspace
 963         if (!BoxesOverlap(model->normalmins, model->normalmaxs, lightmins, lightmaxs))
 964                 return;
 965         R_UpdateAllTextureInfo(ent);
 966         if (ent->model->brush.submodel)
 967                 GL_PolygonOffset(r_refdef.shadowpolygonfactor + r_polygonoffset_submodel_factor.value, r_refdef.shadowpolygonoffset + r_polygonoffset_submodel_offset.value);
 968         if (model->brush.shadowmesh)
 969         {
 970                 R_Shadow_PrepareShadowMark(model->brush.shadowmesh->numtriangles);
 971                 for (modelsurfacelistindex = 0;modelsurfacelistindex < modelnumsurfaces;modelsurfacelistindex++)
 972                 {
 973                         surface = model->data_surfaces + modelsurfacelist[modelsurfacelistindex];
 974                         if (surface->texture->currentframe->currentmaterialflags & MATERIALFLAG_NOSHADOW)
 975                                 continue;
 976                         R_Shadow_MarkVolumeFromBox(surface->num_firstshadowmeshtriangle, surface->num_triangles, model->brush.shadowmesh->vertex3f, model->brush.shadowmesh->element3i, relativelightorigin, relativelightdirection, lightmins, lightmaxs, surface->mins, surface->maxs);
 977                 }
 978                 R_Shadow_VolumeFromList(model->brush.shadowmesh->numverts, model->brush.shadowmesh->numtriangles, model->brush.shadowmesh->vertex3f, model->brush.shadowmesh->element3i, model->brush.shadowmesh->neighbor3i, relativelightorigin, relativelightdirection, projectdistance, numshadowmark, shadowmarklist);
 979         }
 980         else
 981         {
 982                 projectdistance = lightradius + model->radius*2;
 983                 R_Shadow_PrepareShadowMark(model->surfmesh.num_triangles);
 984                 // identify lit faces within the bounding box
 985                 for (modelsurfacelistindex = 0;modelsurfacelistindex < modelnumsurfaces;modelsurfacelistindex++)
 986                 {
 987                         surface = model->data_surfaces + modelsurfacelist[modelsurfacelistindex];
 988                         rsurface.texture = surface->texture->currentframe;
 989                         if (rsurface.texture->currentmaterialflags & MATERIALFLAG_NOSHADOW)
 990                                 continue;
 991                         RSurf_PrepareVerticesForBatch(false, false, 1, &surface);
 992                         R_Shadow_MarkVolumeFromBox(surface->num_firsttriangle, surface->num_triangles, rsurface.vertex3f, rsurface.modelelement3i, relativelightorigin, relativelightdirection, lightmins, lightmaxs, surface->mins, surface->maxs);
 993                 }
 994                 R_Shadow_VolumeFromList(model->surfmesh.num_vertices, model->surfmesh.num_triangles, rsurface.vertex3f, model->surfmesh.data_element3i, model->surfmesh.data_neighbor3i, relativelightorigin, relativelightdirection, projectdistance, numshadowmark, shadowmarklist);
 995         }
 996         if (ent->model->brush.submodel)
 997                 GL_PolygonOffset(r_refdef.shadowpolygonfactor, r_refdef.shadowpolygonoffset);
 998 }
 999
1000 #define BATCHSIZE 1024
1001
1002 static void R_Q1BSP_DrawLight_TransparentCallback(const entity_render_t *ent, const rtlight_t *rtlight, int numsurfaces, int *surfacelist)
1003 {
1004         int i, j, endsurface;
1005         texture_t *t;
1006         msurface_t *surface;
1007         // note: in practice this never actually receives batches), oh well
1008         R_Shadow_RenderMode_Begin();
1009         R_Shadow_RenderMode_ActiveLight((rtlight_t *)rtlight);
1010         R_Shadow_RenderMode_Lighting(false, true);
1011         R_Shadow_SetupEntityLight(ent);
1012         for (i = 0;i < numsurfaces;i = j)
1013         {
1014                 j = i + 1;
1015                 surface = rsurface.modelsurfaces + surfacelist[i];
1016                 t = surface->texture;
1017                 R_UpdateTextureInfo(ent, t);
1018                 rsurface.texture = t->currentframe;
1019                 endsurface = min(j + BATCHSIZE, numsurfaces);
1020                 for (j = i;j < endsurface;j++)
1021                 {
1022                         surface = rsurface.modelsurfaces + surfacelist[j];
1023                         if (t != surface->texture)
1024                                 break;
1025                         RSurf_PrepareVerticesForBatch(true, true, 1, &surface);
1026                         R_Shadow_RenderLighting(surface->num_firstvertex, surface->num_vertices, surface->num_triangles, ent->model->surfmesh.data_element3i + surface->num_firsttriangle * 3, ent->model->surfmesh.ebo, (sizeof(int[3]) * surface->num_firsttriangle));
1027                 }
1028         }
1029         R_Shadow_RenderMode_End();
1030 }
1031
1032 #define RSURF_MAX_BATCHSURFACES 8192
1033
1034 void R_Q1BSP_DrawLight(entity_render_t *ent, int numsurfaces, const int *surfacelist, const unsigned char *trispvs)
1035 {
1036         model_t *model = ent->model;
1037         msurface_t *surface;
1038         int i, k, kend, l, m, mend, endsurface, batchnumsurfaces, batchnumtriangles, batchfirstvertex, batchlastvertex, batchfirsttriangle;
1039         qboolean usebufferobject, culltriangles;
1040         const int *element3i;
1041         msurface_t *batchsurfacelist[RSURF_MAX_BATCHSURFACES];
1042         int batchelements[BATCHSIZE*3];
1043         texture_t *tex;
1044         CHECKGLERROR
1045         R_UpdateAllTextureInfo(ent);
1046         culltriangles = r_shadow_culltriangles.integer && !(ent->flags & RENDER_NOSELFSHADOW);
1047         element3i = rsurface.modelelement3i;
1048         // this is a double loop because non-visible surface skipping has to be
1049         // fast, and even if this is not the world model (and hence no visibility
1050         // checking) the input surface list and batch buffer are different formats
1051         // so some processing is necessary.  (luckily models have few surfaces)
1052         for (i = 0;i < numsurfaces;)
1053         {
1054                 batchnumsurfaces = 0;
1055                 endsurface = min(i + RSURF_MAX_BATCHSURFACES, numsurfaces);
1056                 if (ent == r_refdef.scene.worldentity)
1057                 {
1058                         for (;i < endsurface;i++)
1059                                 if (r_refdef.viewcache.world_surfacevisible[surfacelist[i]])
1060                                         batchsurfacelist[batchnumsurfaces++] = model->data_surfaces + surfacelist[i];
1061                 }
1062                 else
1063                 {
1064                         for (;i < endsurface;i++)
1065                                 batchsurfacelist[batchnumsurfaces++] = model->data_surfaces + surfacelist[i];
1066                 }
1067                 if (!batchnumsurfaces)
1068                         continue;
1069                 for (k = 0;k < batchnumsurfaces;k = kend)
1070                 {
1071                         surface = batchsurfacelist[k];
1072                         tex = surface->texture;
1073                         rsurface.texture = tex->currentframe;
1074                         // gather surfaces into a batch range
1075                         for (kend = k;kend < batchnumsurfaces && tex == batchsurfacelist[kend]->texture;kend++)
1076                                 ;
1077                         // now figure out what to do with this particular range of surfaces
1078                         if (rsurface.texture->currentmaterialflags & (MATERIALFLAG_WALL | MATERIALFLAG_WATER))
1079                         {
1080                                 if (rsurface.texture->currentmaterialflags & MATERIALFLAGMASK_DEPTHSORTED)
1081                                 {
1082                                         vec3_t tempcenter, center;
1083                                         for (l = k;l < kend;l++)
1084                                         {
1085                                                 surface = batchsurfacelist[l];
1086                                                 tempcenter[0] = (surface->mins[0] + surface->maxs[0]) * 0.5f;
1087                                                 tempcenter[1] = (surface->mins[1] + surface->maxs[1]) * 0.5f;
1088                                                 tempcenter[2] = (surface->mins[2] + surface->maxs[2]) * 0.5f;
1089                                                 Matrix4x4_Transform(&rsurface.matrix, tempcenter, center);
1090                                                 R_MeshQueue_AddTransparent(rsurface.texture->currentmaterialflags & MATERIALFLAG_NODEPTHTEST ? r_refdef.view.origin : center, R_Q1BSP_DrawLight_TransparentCallback, ent, surface - rsurface.modelsurfaces, rsurface.rtlight);
1091                                         }
1092                                 }
1093                                 else
1094                                 {
1095                                         // use the bufferobject if all triangles are accepted
1096                                         usebufferobject = true;
1097                                         batchnumtriangles = 0;
1098                                         batchfirsttriangle = surface->num_firsttriangle;
1099                                         for (l = k;l < kend;l++)
1100                                         {
1101                                                 surface = batchsurfacelist[l];
1102                                                 RSurf_PrepareVerticesForBatch(true, true, 1, &surface);
1103                                                 for (m = surface->num_firsttriangle, mend = m + surface->num_triangles;m < mend;m++)
1104                                                 {
1105                                                         if (trispvs)
1106                                                         {
1107                                                                 if (!CHECKPVSBIT(trispvs, m))
1108                                                                 {
1109                                                                         usebufferobject = false;
1110                                                                         continue;
1111                                                                 }
1112                                                         }
1113                                                         else if (culltriangles)
1114                                                         {
1115                                                                 if (r_shadow_frontsidecasting.integer && !PointInfrontOfTriangle(rsurface.entitylightorigin, rsurface.vertex3f + element3i[m*3+0]*3, rsurface.vertex3f + element3i[m*3+1]*3, rsurface.vertex3f + element3i[m*3+2]*3))
1116                                                                 {
1117                                                                         usebufferobject = false;
1118                                                                         continue;
1119                                                                 }
1120                                                         }
1121                                                         if (batchnumtriangles >= BATCHSIZE)
1122                                                         {
1123                                                                 r_refdef.stats.lights_lighttriangles += batchnumtriangles;
1124                                                                 Mod_VertexRangeFromElements(batchnumtriangles*3, batchelements, &batchfirstvertex, &batchlastvertex);
1125                                                                 if (usebufferobject && batchnumtriangles >= 100)
1126                                                                         R_Shadow_RenderLighting(batchfirstvertex, batchlastvertex + 1 - batchfirstvertex, batchnumtriangles, batchelements, ent->model->surfmesh.ebo, sizeof(int[3]) * batchfirsttriangle);
1127                                                                 else
1128                                                                         R_Shadow_RenderLighting(batchfirstvertex, batchlastvertex + 1 - batchfirstvertex, batchnumtriangles, batchelements, 0, 0);
1129                                                                 usebufferobject = true;
1130                                                                 batchnumtriangles = 0;
1131                                                                 batchfirsttriangle = m;
1132                                                         }
1133                                                         batchelements[batchnumtriangles*3+0] = element3i[m*3+0];
1134                                                         batchelements[batchnumtriangles*3+1] = element3i[m*3+1];
1135                                                         batchelements[batchnumtriangles*3+2] = element3i[m*3+2];
1136                                                         batchnumtriangles++;
1137                                                 }
1138                                         }
1139                                         if (batchnumtriangles > 0)
1140                                         {
1141                                                 r_refdef.stats.lights_lighttriangles += batchnumtriangles;
1142                                                 Mod_VertexRangeFromElements(batchnumtriangles*3, batchelements, &batchfirstvertex, &batchlastvertex);
1143                                                 if (usebufferobject && batchnumtriangles >= 100)
1144                                                         R_Shadow_RenderLighting(batchfirstvertex, batchlastvertex + 1 - batchfirstvertex, batchnumtriangles, batchelements, ent->model->surfmesh.ebo, sizeof(int[3]) * batchfirsttriangle);
1145                                                 else
1146                                                         R_Shadow_RenderLighting(batchfirstvertex, batchlastvertex + 1 - batchfirstvertex, batchnumtriangles, batchelements, 0, 0);
1147                                         }
1148                                 }
1149                         }
1150                 }
1151         }
1152 }
1153
1154 //Made by [515]
1155 void R_ReplaceWorldTexture (void)
1156 {
1157         model_t         *m;
1158         texture_t       *t;
1159         int                     i;
1160         const char      *r, *newt;
1161         skinframe_t *skinframe;
1162         if (!r_refdef.scene.worldmodel)
1163         {
1164                 Con_Printf("There is no worldmodel\n");
1165                 return;
1166         }
1167         m = r_refdef.scene.worldmodel;
1168
1169         if(Cmd_Argc() < 2)
1170         {
1171                 Con_Print("r_replacemaptexture <texname> <newtexname> - replaces texture\n");
1172                 Con_Print("r_replacemaptexture <texname> - switch back to default texture\n");
1173                 return;
1174         }
1175         if(!cl.islocalgame || !cl.worldmodel)
1176         {
1177                 Con_Print("This command works only in singleplayer\n");
1178                 return;
1179         }
1180         r = Cmd_Argv(1);
1181         newt = Cmd_Argv(2);
1182         if(!newt[0])
1183                 newt = r;
1184         for(i=0,t=m->data_textures;i<m->num_textures;i++,t++)
1185         {
1186                 if(/*t->width && !strcasecmp(t->name, r)*/ matchpattern( t->name, r, true ) )
1187                 {
1188                         if ((skinframe = R_SkinFrame_LoadExternal(newt, TEXF_MIPMAP | TEXF_ALPHA | TEXF_PRECACHE | TEXF_PICMIP, true)))
1189                         {
1190 //                              t->skinframes[0] = skinframe;
1191                                 t->currentskinframe = skinframe;
1192                                 t->currentskinframe = skinframe;
1193                                 Con_Printf("%s replaced with %s\n", r, newt);
1194                         }
1195                         else
1196                         {
1197                                 Con_Printf("%s was not found\n", newt);
1198                                 return;
1199                         }
1200                 }
1201         }
1202 }
1203
1204 //Made by [515]
1205 void R_ListWorldTextures (void)
1206 {
1207         model_t         *m;
1208         texture_t       *t;
1209         int                     i;
1210         if (!r_refdef.scene.worldmodel)
1211         {
1212                 Con_Printf("There is no worldmodel\n");
1213                 return;
1214         }
1215         m = r_refdef.scene.worldmodel;
1216
1217         Con_Print("Worldmodel textures :\n");
1218         for(i=0,t=m->data_textures;i<m->num_textures;i++,t++)
1219                 if (t->numskinframes)
1220                         Con_Printf("%s\n", t->name);
1221 }
1222
1223 #if 0
1224 static void gl_surf_start(void)
1225 {
1226 }
1227
1228 static void gl_surf_shutdown(void)
1229 {
1230 }
1231
1232 static void gl_surf_newmap(void)
1233 {
1234 }
1235 #endif
1236
1237 void GL_Surf_Init(void)
1238 {
1239
1240         Cvar_RegisterVariable(&r_ambient);
1241         Cvar_RegisterVariable(&r_lockpvs);
1242         Cvar_RegisterVariable(&r_lockvisibility);
1243         Cvar_RegisterVariable(&r_useportalculling);
1244         Cvar_RegisterVariable(&r_q3bsp_renderskydepth);
1245
1246         Cmd_AddCommand ("r_replacemaptexture", R_ReplaceWorldTexture, "override a map texture for testing purposes");
1247         Cmd_AddCommand ("r_listmaptextures", R_ListWorldTextures, "list all textures used by the current map");
1248
1249         //R_RegisterModule("GL_Surf", gl_surf_start, gl_surf_shutdown, gl_surf_newmap);
1250 }
1251