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"};
  29 cvar_t r_drawportals = {0, "r_drawportals", "0"};
  30 cvar_t r_lockpvs = {0, "r_lockpvs", "0"};
  31 cvar_t r_lockvisibility = {0, "r_lockvisibility", "0"};
  32 cvar_t r_useportalculling = {0, "r_useportalculling", "0"};
  33 cvar_t r_drawcollisionbrushes_polygonfactor = {0, "r_drawcollisionbrushes_polygonfactor", "-1"};
  34 cvar_t r_drawcollisionbrushes_polygonoffset = {0, "r_drawcollisionbrushes_polygonoffset", "0"};
  35 cvar_t r_q3bsp_renderskydepth = {0, "r_q3bsp_renderskydepth", "0"};
  36
  37 // flag arrays used for visibility checking on world model
  38 // (all other entities have no per-surface/per-leaf visibility checks)
  39 // TODO: dynamic resize according to r_refdef.worldmodel->brush.num_clusters
  40 unsigned char r_pvsbits[(32768+7)>>3];
  41 // TODO: dynamic resize according to r_refdef.worldmodel->brush.num_leafs
  42 unsigned char r_worldleafvisible[32768];
  43 // TODO: dynamic resize according to r_refdef.worldmodel->num_surfaces
  44 unsigned char r_worldsurfacevisible[262144];
  45
  46 /*
  47 ===============
  48 R_BuildLightMap
  49
  50 Combine and scale multiple lightmaps into the 8.8 format in blocklights
  51 ===============
  52 */
  53 void R_BuildLightMap (const entity_render_t *ent, msurface_t *surface)
  54 {
  55         int smax, tmax, i, j, size, size3, maps, stride, l;
  56         unsigned int *bl, scale;
  57         unsigned char *lightmap, *out, *stain;
  58         static unsigned int intblocklights[MAX_LIGHTMAP_SIZE*MAX_LIGHTMAP_SIZE*3]; // LordHavoc: *3 for colored lighting
  59         static unsigned char templight[MAX_LIGHTMAP_SIZE*MAX_LIGHTMAP_SIZE*4];
  60
  61         // update cached lighting info
  62         surface->cached_dlight = 0;
  63
  64         smax = (surface->lightmapinfo->extents[0]>>4)+1;
  65         tmax = (surface->lightmapinfo->extents[1]>>4)+1;
  66         size = smax*tmax;
  67         size3 = size*3;
  68         lightmap = surface->lightmapinfo->samples;
  69
  70 // set to full bright if no light data
  71         bl = intblocklights;
  72         if (!ent->model->brushq1.lightdata)
  73         {
  74                 for (i = 0;i < size3;i++)
  75                         bl[i] = 255*256;
  76         }
  77         else
  78         {
  79 // clear to no light
  80                 memset(bl, 0, size*3*sizeof(unsigned int));
  81
  82 // add all the lightmaps
  83                 if (lightmap)
  84                 {
  85                         bl = intblocklights;
  86                         for (maps = 0;maps < MAXLIGHTMAPS && surface->lightmapinfo->styles[maps] != 255;maps++, lightmap += size3)
  87                                 for (scale = r_refdef.lightstylevalue[surface->lightmapinfo->styles[maps]], i = 0;i < size3;i++)
  88                                         bl[i] += lightmap[i] * scale;
  89                 }
  90         }
  91
  92         stain = surface->lightmapinfo->stainsamples;
  93         bl = intblocklights;
  94         out = templight;
  95         // the >> 16 shift adjusts down 8 bits to account for the stainmap
  96         // scaling, and remaps the 0-65536 (2x overbright) to 0-256, it will
  97         // be doubled during rendering to achieve 2x overbright
  98         // (0 = 0.0, 128 = 1.0, 256 = 2.0)
  99         if (ent->model->brushq1.lightmaprgba)
 100         {
 101                 stride = (surface->lightmapinfo->lightmaptexturestride - smax) * 4;
 102                 for (i = 0;i < tmax;i++, out += stride)
 103                 {
 104                         for (j = 0;j < smax;j++)
 105                         {
 106                                 l = (*bl++ * *stain++) >> 16;*out++ = min(l, 255);
 107                                 l = (*bl++ * *stain++) >> 16;*out++ = min(l, 255);
 108                                 l = (*bl++ * *stain++) >> 16;*out++ = min(l, 255);
 109                                 *out++ = 255;
 110                         }
 111                 }
 112         }
 113         else
 114         {
 115                 stride = (surface->lightmapinfo->lightmaptexturestride - smax) * 3;
 116                 for (i = 0;i < tmax;i++, out += stride)
 117                 {
 118                         for (j = 0;j < smax;j++)
 119                         {
 120                                 l = (*bl++ * *stain++) >> 16;*out++ = min(l, 255);
 121                                 l = (*bl++ * *stain++) >> 16;*out++ = min(l, 255);
 122                                 l = (*bl++ * *stain++) >> 16;*out++ = min(l, 255);
 123                         }
 124                 }
 125         }
 126
 127         R_UpdateTexture(surface->lightmaptexture, templight);
 128 }
 129
 130 void R_StainNode (mnode_t *node, model_t *model, const vec3_t origin, float radius, const float fcolor[8])
 131 {
 132         float ndist, a, ratio, maxdist, maxdist2, maxdist3, invradius, sdtable[256], td, dist2;
 133         msurface_t *surface, *endsurface;
 134         int i, s, t, smax, tmax, smax3, impacts, impactt, stained;
 135         unsigned char *bl;
 136         vec3_t impact;
 137
 138         maxdist = radius * radius;
 139         invradius = 1.0f / radius;
 140
 141 loc0:
 142         if (!node->plane)
 143                 return;
 144         ndist = PlaneDiff(origin, node->plane);
 145         if (ndist > radius)
 146         {
 147                 node = node->children[0];
 148                 goto loc0;
 149         }
 150         if (ndist < -radius)
 151         {
 152                 node = node->children[1];
 153                 goto loc0;
 154         }
 155
 156         dist2 = ndist * ndist;
 157         maxdist3 = maxdist - dist2;
 158
 159         if (node->plane->type < 3)
 160         {
 161                 VectorCopy(origin, impact);
 162                 impact[node->plane->type] -= ndist;
 163         }
 164         else
 165         {
 166                 impact[0] = origin[0] - node->plane->normal[0] * ndist;
 167                 impact[1] = origin[1] - node->plane->normal[1] * ndist;
 168                 impact[2] = origin[2] - node->plane->normal[2] * ndist;
 169         }
 170
 171         for (surface = model->data_surfaces + node->firstsurface, endsurface = surface + node->numsurfaces;surface < endsurface;surface++)
 172         {
 173                 if (surface->lightmapinfo->stainsamples)
 174                 {
 175                         smax = (surface->lightmapinfo->extents[0] >> 4) + 1;
 176                         tmax = (surface->lightmapinfo->extents[1] >> 4) + 1;
 177
 178                         impacts = DotProduct (impact, surface->lightmapinfo->texinfo->vecs[0]) + surface->lightmapinfo->texinfo->vecs[0][3] - surface->lightmapinfo->texturemins[0];
 179                         impactt = DotProduct (impact, surface->lightmapinfo->texinfo->vecs[1]) + surface->lightmapinfo->texinfo->vecs[1][3] - surface->lightmapinfo->texturemins[1];
 180
 181                         s = bound(0, impacts, smax * 16) - impacts;
 182                         t = bound(0, impactt, tmax * 16) - impactt;
 183                         i = s * s + t * t + dist2;
 184                         if (i > maxdist)
 185                                 continue;
 186
 187                         // reduce calculations
 188                         for (s = 0, i = impacts; s < smax; s++, i -= 16)
 189                                 sdtable[s] = i * i + dist2;
 190
 191                         bl = surface->lightmapinfo->stainsamples;
 192                         smax3 = smax * 3;
 193                         stained = false;
 194
 195                         i = impactt;
 196                         for (t = 0;t < tmax;t++, i -= 16)
 197                         {
 198                                 td = i * i;
 199                                 // make sure some part of it is visible on this line
 200                                 if (td < maxdist3)
 201                                 {
 202                                         maxdist2 = maxdist - td;
 203                                         for (s = 0;s < smax;s++)
 204                                         {
 205                                                 if (sdtable[s] < maxdist2)
 206                                                 {
 207                                                         ratio = lhrandom(0.0f, 1.0f);
 208                                                         a = (fcolor[3] + ratio * fcolor[7]) * (1.0f - sqrt(sdtable[s] + td) * invradius);
 209                                                         if (a >= (1.0f / 64.0f))
 210                                                         {
 211                                                                 if (a > 1)
 212                                                                         a = 1;
 213                                                                 bl[0] = (unsigned char) ((float) bl[0] + a * ((fcolor[0] + ratio * fcolor[4]) - (float) bl[0]));
 214                                                                 bl[1] = (unsigned char) ((float) bl[1] + a * ((fcolor[1] + ratio * fcolor[5]) - (float) bl[1]));
 215                                                                 bl[2] = (unsigned char) ((float) bl[2] + a * ((fcolor[2] + ratio * fcolor[6]) - (float) bl[2]));
 216                                                                 stained = true;
 217                                                         }
 218                                                 }
 219                                                 bl += 3;
 220                                         }
 221                                 }
 222                                 else // skip line
 223                                         bl += smax3;
 224                         }
 225                         // force lightmap upload
 226                         if (stained)
 227                                 surface->cached_dlight = true;
 228                 }
 229         }
 230
 231         if (node->children[0]->plane)
 232         {
 233                 if (node->children[1]->plane)
 234                 {
 235                         R_StainNode(node->children[0], model, origin, radius, fcolor);
 236                         node = node->children[1];
 237                         goto loc0;
 238                 }
 239                 else
 240                 {
 241                         node = node->children[0];
 242                         goto loc0;
 243                 }
 244         }
 245         else if (node->children[1]->plane)
 246         {
 247                 node = node->children[1];
 248                 goto loc0;
 249         }
 250 }
 251
 252 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)
 253 {
 254         int n;
 255         float fcolor[8];
 256         entity_render_t *ent;
 257         model_t *model;
 258         vec3_t org;
 259         if (r_refdef.worldmodel == NULL || !r_refdef.worldmodel->brush.data_nodes || !r_refdef.worldmodel->brushq1.lightdata)
 260                 return;
 261         fcolor[0] = cr1;
 262         fcolor[1] = cg1;
 263         fcolor[2] = cb1;
 264         fcolor[3] = ca1 * (1.0f / 64.0f);
 265         fcolor[4] = cr2 - cr1;
 266         fcolor[5] = cg2 - cg1;
 267         fcolor[6] = cb2 - cb1;
 268         fcolor[7] = (ca2 - ca1) * (1.0f / 64.0f);
 269
 270         R_StainNode(r_refdef.worldmodel->brush.data_nodes + r_refdef.worldmodel->brushq1.hulls[0].firstclipnode, r_refdef.worldmodel, origin, radius, fcolor);
 271
 272         // look for embedded bmodels
 273         for (n = 0;n < cl_num_brushmodel_entities;n++)
 274         {
 275                 ent = &cl_entities[cl_brushmodel_entities[n]].render;
 276                 model = ent->model;
 277                 if (model && model->name[0] == '*')
 278                 {
 279                         if (model->brush.data_nodes)
 280                         {
 281                                 Matrix4x4_Transform(&ent->inversematrix, origin, org);
 282                                 R_StainNode(model->brush.data_nodes + model->brushq1.hulls[0].firstclipnode, model, org, radius, fcolor);
 283                         }
 284                 }
 285         }
 286 }
 287
 288
 289 /*
 290 =============================================================
 291
 292         BRUSH MODELS
 293
 294 =============================================================
 295 */
 296
 297 static void R_DrawPortal_Callback(const void *calldata1, int calldata2)
 298 {
 299         int i;
 300         float *v;
 301         rmeshstate_t m;
 302         const mportal_t *portal = (mportal_t *)calldata1;
 303         GL_BlendFunc(GL_SRC_ALPHA, GL_ONE_MINUS_SRC_ALPHA);
 304         GL_DepthMask(false);
 305         GL_DepthTest(true);
 306         R_Mesh_Matrix(&r_identitymatrix);
 307
 308         memset(&m, 0, sizeof(m));
 309         m.pointer_vertex = varray_vertex3f;
 310         R_Mesh_State(&m);
 311
 312         i = calldata2;
 313         GL_Color(((i & 0x0007) >> 0) * (1.0f / 7.0f),
 314                          ((i & 0x0038) >> 3) * (1.0f / 7.0f),
 315                          ((i & 0x01C0) >> 6) * (1.0f / 7.0f),
 316                          0.125f);
 317         if (PlaneDiff(r_vieworigin, (&portal->plane)) < 0)
 318         {
 319                 for (i = portal->numpoints - 1, v = varray_vertex3f;i >= 0;i--, v += 3)
 320                         VectorCopy(portal->points[i].position, v);
 321         }
 322         else
 323                 for (i = 0, v = varray_vertex3f;i < portal->numpoints;i++, v += 3)
 324                         VectorCopy(portal->points[i].position, v);
 325         GL_LockArrays(0, portal->numpoints);
 326         R_Mesh_Draw(0, portal->numpoints, portal->numpoints - 2, polygonelements);
 327         GL_LockArrays(0, 0);
 328 }
 329
 330 // LordHavoc: this is just a nice debugging tool, very slow
 331 static void R_DrawPortals(void)
 332 {
 333         int i, leafnum;//, portalnum;
 334         mportal_t *portal;
 335         float center[3], f;
 336         model_t *model = r_refdef.worldmodel;
 337         if (model == NULL)
 338                 return;
 339         for (leafnum = 0;leafnum < r_refdef.worldmodel->brush.num_leafs;leafnum++)
 340         {
 341                 if (r_worldleafvisible[leafnum])
 342                 {
 343                         //for (portalnum = 0, portal = model->brush.data_portals;portalnum < model->brush.num_portals;portalnum++, portal++)
 344                         for (portal = r_refdef.worldmodel->brush.data_leafs[leafnum].portals;portal;portal = portal->next)
 345                         {
 346                                 if (portal->numpoints <= POLYGONELEMENTS_MAXPOINTS)
 347                                 if (!R_CullBox(portal->mins, portal->maxs))
 348                                 {
 349                                         VectorClear(center);
 350                                         for (i = 0;i < portal->numpoints;i++)
 351                                                 VectorAdd(center, portal->points[i].position, center);
 352                                         f = ixtable[portal->numpoints];
 353                                         VectorScale(center, f, center);
 354                                         //R_MeshQueue_AddTransparent(center, R_DrawPortal_Callback, portal, portalnum);
 355                                         R_MeshQueue_AddTransparent(center, R_DrawPortal_Callback, portal, leafnum);
 356                                 }
 357                         }
 358                 }
 359         }
 360 }
 361
 362 static void R_DrawCollisionBrush(colbrushf_t *brush)
 363 {
 364         int i;
 365         rmeshstate_t m;
 366         memset(&m, 0, sizeof(m));
 367         m.pointer_vertex = brush->points->v;
 368         R_Mesh_State(&m);
 369         i = (int)(((size_t)brush) / sizeof(colbrushf_t));
 370         GL_Color((i & 31) * (1.0f / 32.0f), ((i >> 5) & 31) * (1.0f / 32.0f), ((i >> 10) & 31) * (1.0f / 32.0f), 0.2f);
 371         GL_LockArrays(0, brush->numpoints);
 372         R_Mesh_Draw(0, brush->numpoints, brush->numtriangles, brush->elements);
 373         GL_LockArrays(0, 0);
 374 }
 375
 376 static void R_DrawCollisionSurface(entity_render_t *ent, msurface_t *surface)
 377 {
 378         int i;
 379         rmeshstate_t m;
 380         if (!surface->num_collisiontriangles)
 381                 return;
 382         memset(&m, 0, sizeof(m));
 383         m.pointer_vertex = surface->data_collisionvertex3f;
 384         R_Mesh_State(&m);
 385         i = (int)(((size_t)surface) / sizeof(msurface_t));
 386         GL_Color((i & 31) * (1.0f / 32.0f), ((i >> 5) & 31) * (1.0f / 32.0f), ((i >> 10) & 31) * (1.0f / 32.0f), 0.2f);
 387         GL_LockArrays(0, surface->num_collisionvertices);
 388         R_Mesh_Draw(0, surface->num_collisionvertices, surface->num_collisiontriangles, surface->data_collisionelement3i);
 389         GL_LockArrays(0, 0);
 390 }
 391
 392 void R_WorldVisibility(void)
 393 {
 394         int i, j, *mark;
 395         mleaf_t *leaf;
 396         mleaf_t *viewleaf;
 397         model_t *model = r_refdef.worldmodel;
 398
 399         if (!model)
 400                 return;
 401
 402         // if possible find the leaf the view origin is in
 403         viewleaf = model->brush.PointInLeaf ? model->brush.PointInLeaf(model, r_vieworigin) : NULL;
 404         // if possible fetch the visible cluster bits
 405         if (!r_lockpvs.integer && model->brush.FatPVS)
 406                 model->brush.FatPVS(model, r_vieworigin, 2, r_pvsbits, sizeof(r_pvsbits));
 407
 408         if (!r_lockvisibility.integer)
 409         {
 410                 // clear the visible surface and leaf flags arrays
 411                 memset(r_worldsurfacevisible, 0, model->num_surfaces);
 412                 memset(r_worldleafvisible, 0, model->brush.num_leafs);
 413
 414                 // if floating around in the void (no pvs data available, and no
 415                 // portals available), simply use all on-screen leafs.
 416                 if (!viewleaf || viewleaf->clusterindex < 0)
 417                 {
 418                         // no visibility method: (used when floating around in the void)
 419                         // simply cull each leaf to the frustum (view pyramid)
 420                         // similar to quake's RecursiveWorldNode but without cache misses
 421                         for (j = 0, leaf = model->brush.data_leafs;j < model->brush.num_leafs;j++, leaf++)
 422                         {
 423                                 // if leaf is in current pvs and on the screen, mark its surfaces
 424                                 if (!R_CullBox(leaf->mins, leaf->maxs))
 425                                 {
 426                                         renderstats.world_leafs++;
 427                                         r_worldleafvisible[j] = true;
 428                                         if (leaf->numleafsurfaces)
 429                                                 for (i = 0, mark = leaf->firstleafsurface;i < leaf->numleafsurfaces;i++, mark++)
 430                                                         r_worldsurfacevisible[*mark] = true;
 431                                 }
 432                         }
 433                 }
 434                 // if the user prefers to disable portal culling (testing?), simply
 435                 // use all on-screen leafs that are in the pvs.
 436                 else if (!r_useportalculling.integer)
 437                 {
 438                         // pvs method:
 439                         // simply check if each leaf is in the Potentially Visible Set,
 440                         // and cull to frustum (view pyramid)
 441                         // similar to quake's RecursiveWorldNode but without cache misses
 442                         for (j = 0, leaf = model->brush.data_leafs;j < model->brush.num_leafs;j++, leaf++)
 443                         {
 444                                 // if leaf is in current pvs and on the screen, mark its surfaces
 445                                 if (CHECKPVSBIT(r_pvsbits, leaf->clusterindex) && !R_CullBox(leaf->mins, leaf->maxs))
 446                                 {
 447                                         renderstats.world_leafs++;
 448                                         r_worldleafvisible[j] = true;
 449                                         if (leaf->numleafsurfaces)
 450                                                 for (i = 0, mark = leaf->firstleafsurface;i < leaf->numleafsurfaces;i++, mark++)
 451                                                         r_worldsurfacevisible[*mark] = true;
 452                                 }
 453                         }
 454                 }
 455                 // otherwise use a recursive portal flow, culling each portal to
 456                 // frustum and checking if the leaf the portal leads to is in the pvs
 457                 else
 458                 {
 459                         int leafstackpos;
 460                         mportal_t *p;
 461                         mleaf_t *leafstack[8192];
 462                         // simple-frustum portal method:
 463                         // follows portals leading outward from viewleaf, does not venture
 464                         // offscreen or into leafs that are not visible, faster than
 465                         // Quake's RecursiveWorldNode and vastly better in unvised maps,
 466                         // often culls some surfaces that pvs alone would miss
 467                         // (such as a room in pvs that is hidden behind a wall, but the
 468                         //  passage leading to the room is off-screen)
 469                         leafstack[0] = viewleaf;
 470                         leafstackpos = 1;
 471                         while (leafstackpos)
 472                         {
 473                                 renderstats.world_leafs++;
 474                                 leaf = leafstack[--leafstackpos];
 475                                 r_worldleafvisible[leaf - model->brush.data_leafs] = true;
 476                                 // mark any surfaces bounding this leaf
 477                                 if (leaf->numleafsurfaces)
 478                                         for (i = 0, mark = leaf->firstleafsurface;i < leaf->numleafsurfaces;i++, mark++)
 479                                                 r_worldsurfacevisible[*mark] = true;
 480                                 // follow portals into other leafs
 481                                 // the checks are:
 482                                 // if viewer is behind portal (portal faces outward into the scene)
 483                                 // and the portal polygon's bounding box is on the screen
 484                                 // and the leaf has not been visited yet
 485                                 // and the leaf is visible in the pvs
 486                                 // (the first two checks won't cause as many cache misses as the leaf checks)
 487                                 for (p = leaf->portals;p;p = p->next)
 488                                 {
 489                                         renderstats.world_portals++;
 490                                         if (DotProduct(r_vieworigin, p->plane.normal) < (p->plane.dist + 1) && !R_CullBox(p->mins, p->maxs) && !r_worldleafvisible[p->past - model->brush.data_leafs] && CHECKPVSBIT(r_pvsbits, p->past->clusterindex))
 491                                                 leafstack[leafstackpos++] = p->past;
 492                                 }
 493                         }
 494                 }
 495         }
 496
 497         if (r_drawportals.integer)
 498                 R_DrawPortals();
 499 }
 500
 501 void R_Q1BSP_DrawSky(entity_render_t *ent)
 502 {
 503         if (ent->model == NULL)
 504                 return;
 505         if (r_drawcollisionbrushes.integer < 2)
 506                 R_DrawSurfaces(ent, true);
 507 }
 508
 509 void R_Q1BSP_Draw(entity_render_t *ent)
 510 {
 511         model_t *model = ent->model;
 512         if (model == NULL)
 513                 return;
 514         if (r_drawcollisionbrushes.integer < 2)
 515                 R_DrawSurfaces(ent, false);
 516         if (r_drawcollisionbrushes.integer >= 1 && model->brush.num_brushes)
 517         {
 518                 int i;
 519                 msurface_t *surface;
 520                 q3mbrush_t *brush;
 521                 R_Mesh_Matrix(&ent->matrix);
 522                 GL_BlendFunc(GL_SRC_ALPHA, GL_ONE);
 523                 GL_DepthMask(false);
 524                 GL_DepthTest(true);
 525                 qglPolygonOffset(r_drawcollisionbrushes_polygonfactor.value, r_drawcollisionbrushes_polygonoffset.value);
 526                 for (i = 0, brush = model->brush.data_brushes + model->firstmodelbrush;i < model->nummodelbrushes;i++, brush++)
 527                         if (brush->colbrushf && brush->colbrushf->numtriangles)
 528                                 R_DrawCollisionBrush(brush->colbrushf);
 529                 for (i = 0, surface = model->data_surfaces + model->firstmodelsurface;i < model->nummodelsurfaces;i++, surface++)
 530                         if (surface->num_collisiontriangles)
 531                                 R_DrawCollisionSurface(ent, surface);
 532                 qglPolygonOffset(0, 0);
 533         }
 534 }
 535
 536 typedef struct r_q1bsp_getlightinfo_s
 537 {
 538         model_t *model;
 539         vec3_t relativelightorigin;
 540         float lightradius;
 541         int *outleaflist;
 542         unsigned char *outleafpvs;
 543         int outnumleafs;
 544         int *outsurfacelist;
 545         unsigned char *outsurfacepvs;
 546         int outnumsurfaces;
 547         vec3_t outmins;
 548         vec3_t outmaxs;
 549         vec3_t lightmins;
 550         vec3_t lightmaxs;
 551         const unsigned char *pvs;
 552 }
 553 r_q1bsp_getlightinfo_t;
 554
 555 void R_Q1BSP_RecursiveGetLightInfo(r_q1bsp_getlightinfo_t *info, mnode_t *node)
 556 {
 557         int sides;
 558         mleaf_t *leaf;
 559         for (;;)
 560         {
 561                 mplane_t *plane = node->plane;
 562                 //if (!BoxesOverlap(info->lightmins, info->lightmaxs, node->mins, node->maxs))
 563                 //      return;
 564                 if (!plane)
 565                         break;
 566                 if (plane->type < 3)
 567                         sides = ((info->lightmaxs[plane->type] >= plane->dist) | ((info->lightmins[plane->type] < plane->dist) << 1));
 568                 else
 569                         sides = BoxOnPlaneSide(info->lightmins, info->lightmaxs, plane);
 570                 if (sides == 3)
 571                 {
 572                         R_Q1BSP_RecursiveGetLightInfo(info, node->children[0]);
 573                         node = node->children[1];
 574                 }
 575                 else
 576                         node = node->children[sides - 1];
 577         }
 578         leaf = (mleaf_t *)node;
 579         if (info->pvs == NULL || CHECKPVSBIT(info->pvs, leaf->clusterindex))
 580         {
 581                 info->outmins[0] = min(info->outmins[0], leaf->mins[0]);
 582                 info->outmins[1] = min(info->outmins[1], leaf->mins[1]);
 583                 info->outmins[2] = min(info->outmins[2], leaf->mins[2]);
 584                 info->outmaxs[0] = max(info->outmaxs[0], leaf->maxs[0]);
 585                 info->outmaxs[1] = max(info->outmaxs[1], leaf->maxs[1]);
 586                 info->outmaxs[2] = max(info->outmaxs[2], leaf->maxs[2]);
 587                 if (info->outleafpvs)
 588                 {
 589                         int leafindex = leaf - info->model->brush.data_leafs;
 590                         if (!CHECKPVSBIT(info->outleafpvs, leafindex))
 591                         {
 592                                 SETPVSBIT(info->outleafpvs, leafindex);
 593                                 info->outleaflist[info->outnumleafs++] = leafindex;
 594                         }
 595                 }
 596                 if (info->outsurfacepvs)
 597                 {
 598                         int leafsurfaceindex;
 599                         for (leafsurfaceindex = 0;leafsurfaceindex < leaf->numleafsurfaces;leafsurfaceindex++)
 600                         {
 601                                 int surfaceindex = leaf->firstleafsurface[leafsurfaceindex];
 602                                 if (!CHECKPVSBIT(info->outsurfacepvs, surfaceindex))
 603                                 {
 604                                         msurface_t *surface = info->model->data_surfaces + surfaceindex;
 605                                         if (BoxesOverlap(info->lightmins, info->lightmaxs, surface->mins, surface->maxs))
 606                                         if ((surface->texture->currentmaterialflags & (MATERIALFLAG_WALL | MATERIALFLAG_NODRAW | MATERIALFLAG_TRANSPARENT)) == MATERIALFLAG_WALL)
 607                                         {
 608                                                 int triangleindex, t;
 609                                                 const int *e;
 610                                                 const vec_t *v[3];
 611                                                 for (triangleindex = 0, t = surface->num_firstshadowmeshtriangle, e = info->model->brush.shadowmesh->element3i + t * 3;triangleindex < surface->num_triangles;triangleindex++, t++, e += 3)
 612                                                 {
 613                                                         v[0] = info->model->brush.shadowmesh->vertex3f + e[0] * 3;
 614                                                         v[1] = info->model->brush.shadowmesh->vertex3f + e[1] * 3;
 615                                                         v[2] = info->model->brush.shadowmesh->vertex3f + e[2] * 3;
 616                                                         if (PointInfrontOfTriangle(info->relativelightorigin, v[0], v[1], v[2]) && info->lightmaxs[0] > min(v[0][0], min(v[1][0], v[2][0])) && info->lightmins[0] < max(v[0][0], max(v[1][0], v[2][0])) && info->lightmaxs[1] > min(v[0][1], min(v[1][1], v[2][1])) && info->lightmins[1] < max(v[0][1], max(v[1][1], v[2][1])) && info->lightmaxs[2] > min(v[0][2], min(v[1][2], v[2][2])) && info->lightmins[2] < max(v[0][2], max(v[1][2], v[2][2])))
 617                                                         {
 618                                                                 SETPVSBIT(info->outsurfacepvs, surfaceindex);
 619                                                                 info->outsurfacelist[info->outnumsurfaces++] = surfaceindex;
 620                                                                 break;
 621                                                         }
 622                                                 }
 623                                         }
 624                                 }
 625                         }
 626                 }
 627         }
 628 }
 629
 630 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)
 631 {
 632         r_q1bsp_getlightinfo_t info;
 633         VectorCopy(relativelightorigin, info.relativelightorigin);
 634         info.lightradius = lightradius;
 635         info.lightmins[0] = info.relativelightorigin[0] - info.lightradius;
 636         info.lightmins[1] = info.relativelightorigin[1] - info.lightradius;
 637         info.lightmins[2] = info.relativelightorigin[2] - info.lightradius;
 638         info.lightmaxs[0] = info.relativelightorigin[0] + info.lightradius;
 639         info.lightmaxs[1] = info.relativelightorigin[1] + info.lightradius;
 640         info.lightmaxs[2] = info.relativelightorigin[2] + info.lightradius;
 641         if (ent->model == NULL)
 642         {
 643                 VectorCopy(info.lightmins, outmins);
 644                 VectorCopy(info.lightmaxs, outmaxs);
 645                 *outnumleafspointer = 0;
 646                 *outnumsurfacespointer = 0;
 647                 return;
 648         }
 649         info.model = ent->model;
 650         info.outleaflist = outleaflist;
 651         info.outleafpvs = outleafpvs;
 652         info.outnumleafs = 0;
 653         info.outsurfacelist = outsurfacelist;
 654         info.outsurfacepvs = outsurfacepvs;
 655         info.outnumsurfaces = 0;
 656         VectorCopy(info.relativelightorigin, info.outmins);
 657         VectorCopy(info.relativelightorigin, info.outmaxs);
 658         memset(outleafpvs, 0, (info.model->brush.num_leafs + 7) >> 3);
 659         memset(outsurfacepvs, 0, (info.model->nummodelsurfaces + 7) >> 3);
 660         if (info.model->brush.GetPVS)
 661                 info.pvs = info.model->brush.GetPVS(info.model, info.relativelightorigin);
 662         else
 663                 info.pvs = NULL;
 664         R_UpdateAllTextureInfo(ent);
 665         if (r_shadow_compilingrtlight)
 666         {
 667                 // use portal recursion for exact light volume culling, and exact surface checking
 668                 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);
 669         }
 670         else if (r_shadow_realtime_dlight_portalculling.integer)
 671         {
 672                 // use portal recursion for exact light volume culling, but not the expensive exact surface checking
 673                 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);
 674         }
 675         else
 676         {
 677                 // use BSP recursion as lights are often small
 678                 R_Q1BSP_RecursiveGetLightInfo(&info, info.model->brush.data_nodes);
 679         }
 680
 681         // limit combined leaf box to light boundaries
 682         outmins[0] = max(info.outmins[0] - 1, info.lightmins[0]);
 683         outmins[1] = max(info.outmins[1] - 1, info.lightmins[1]);
 684         outmins[2] = max(info.outmins[2] - 1, info.lightmins[2]);
 685         outmaxs[0] = min(info.outmaxs[0] + 1, info.lightmaxs[0]);
 686         outmaxs[1] = min(info.outmaxs[1] + 1, info.lightmaxs[1]);
 687         outmaxs[2] = min(info.outmaxs[2] + 1, info.lightmaxs[2]);
 688
 689         *outnumleafspointer = info.outnumleafs;
 690         *outnumsurfacespointer = info.outnumsurfaces;
 691 }
 692
 693 void R_Q1BSP_CompileShadowVolume(entity_render_t *ent, vec3_t relativelightorigin, float lightradius, int numsurfaces, const int *surfacelist)
 694 {
 695         model_t *model = ent->model;
 696         msurface_t *surface;
 697         int surfacelistindex;
 698         float projectdistance = lightradius + model->radius*2 + r_shadow_projectdistance.value;
 699         texture_t *texture;
 700         r_shadow_compilingrtlight->static_meshchain_shadow = Mod_ShadowMesh_Begin(r_shadow_mempool, 32768, 32768, NULL, NULL, NULL, false, false, true);
 701         R_Shadow_PrepareShadowMark(model->brush.shadowmesh->numtriangles);
 702         for (surfacelistindex = 0;surfacelistindex < numsurfaces;surfacelistindex++)
 703         {
 704                 surface = model->data_surfaces + surfacelist[surfacelistindex];
 705                 texture = surface->texture;
 706                 if ((texture->basematerialflags & (MATERIALFLAG_NODRAW | MATERIALFLAG_TRANSPARENT | MATERIALFLAG_WALL)) != MATERIALFLAG_WALL)
 707                         continue;
 708                 if (texture->textureflags & (Q3TEXTUREFLAG_TWOSIDED | Q3TEXTUREFLAG_AUTOSPRITE | Q3TEXTUREFLAG_AUTOSPRITE2))
 709                         continue;
 710                 R_Shadow_MarkVolumeFromBox(surface->num_firstshadowmeshtriangle, surface->num_triangles, model->brush.shadowmesh->vertex3f, model->brush.shadowmesh->element3i, relativelightorigin, r_shadow_compilingrtlight->cullmins, r_shadow_compilingrtlight->cullmaxs, surface->mins, surface->maxs);
 711         }
 712         R_Shadow_VolumeFromList(model->brush.shadowmesh->numverts, model->brush.shadowmesh->numtriangles, model->brush.shadowmesh->vertex3f, model->brush.shadowmesh->element3i, model->brush.shadowmesh->neighbor3i, relativelightorigin, lightradius + model->radius + projectdistance, numshadowmark, shadowmarklist);
 713         r_shadow_compilingrtlight->static_meshchain_shadow = Mod_ShadowMesh_Finish(r_shadow_mempool, r_shadow_compilingrtlight->static_meshchain_shadow, false, false);
 714 }
 715
 716 extern float *rsurface_vertex3f;
 717 extern float *rsurface_svector3f;
 718 extern float *rsurface_tvector3f;
 719 extern float *rsurface_normal3f;
 720 extern void RSurf_SetVertexPointer(const entity_render_t *ent, const texture_t *texture, const msurface_t *surface, const vec3_t modelorg);
 721
 722 void R_Q1BSP_DrawShadowVolume(entity_render_t *ent, vec3_t relativelightorigin, float lightradius, int numsurfaces, const int *surfacelist, const vec3_t lightmins, const vec3_t lightmaxs)
 723 {
 724         model_t *model = ent->model;
 725         msurface_t *surface;
 726         int surfacelistindex;
 727         float projectdistance = lightradius + model->radius*2 + r_shadow_projectdistance.value;
 728         vec3_t modelorg;
 729         texture_t *texture;
 730         // check the box in modelspace, it was already checked in worldspace
 731         if (!BoxesOverlap(ent->model->normalmins, ent->model->normalmaxs, lightmins, lightmaxs))
 732                 return;
 733         if (r_drawcollisionbrushes.integer >= 2)
 734                 return;
 735         R_UpdateAllTextureInfo(ent);
 736         if (model->brush.shadowmesh)
 737         {
 738                 R_Shadow_PrepareShadowMark(model->brush.shadowmesh->numtriangles);
 739                 for (surfacelistindex = 0;surfacelistindex < numsurfaces;surfacelistindex++)
 740                 {
 741                         surface = model->data_surfaces + surfacelist[surfacelistindex];
 742                         texture = surface->texture->currentframe;
 743                         if ((texture->currentmaterialflags & (MATERIALFLAG_NODRAW | MATERIALFLAG_TRANSPARENT | MATERIALFLAG_WALL)) != MATERIALFLAG_WALL)
 744                                 continue;
 745                         if (texture->textureflags & (Q3TEXTUREFLAG_TWOSIDED | Q3TEXTUREFLAG_AUTOSPRITE | Q3TEXTUREFLAG_AUTOSPRITE2))
 746                                 continue;
 747                         R_Shadow_MarkVolumeFromBox(surface->num_firstshadowmeshtriangle, surface->num_triangles, model->brush.shadowmesh->vertex3f, model->brush.shadowmesh->element3i, relativelightorigin, lightmins, lightmaxs, surface->mins, surface->maxs);
 748                 }
 749                 R_Shadow_VolumeFromList(model->brush.shadowmesh->numverts, model->brush.shadowmesh->numtriangles, model->brush.shadowmesh->vertex3f, model->brush.shadowmesh->element3i, model->brush.shadowmesh->neighbor3i, relativelightorigin, lightradius + model->radius + projectdistance, numshadowmark, shadowmarklist);
 750         }
 751         else
 752         {
 753                 projectdistance = lightradius + ent->model->radius*2;
 754                 Matrix4x4_Transform(&ent->inversematrix, r_vieworigin, modelorg);
 755                 for (surfacelistindex = 0;surfacelistindex < numsurfaces;surfacelistindex++)
 756                 {
 757                         surface = model->data_surfaces + surfacelist[surfacelistindex];
 758                         // FIXME: get current skin
 759                         texture = surface->texture;//R_FetchAliasSkin(ent, surface->groupmesh);
 760                         if (texture->currentmaterialflags & (MATERIALFLAG_NODRAW | MATERIALFLAG_TRANSPARENT) || !surface->num_triangles)
 761                                 continue;
 762                         RSurf_SetVertexPointer(ent, texture, surface, modelorg);
 763                         // identify lit faces within the bounding box
 764                         R_Shadow_PrepareShadowMark(surface->groupmesh->num_triangles);
 765                         R_Shadow_MarkVolumeFromBox(surface->num_firsttriangle, surface->num_triangles, rsurface_vertex3f, surface->groupmesh->data_element3i, relativelightorigin, lightmins, lightmaxs, surface->mins, surface->maxs);
 766                         R_Shadow_VolumeFromList(surface->groupmesh->num_vertices, surface->groupmesh->num_triangles, rsurface_vertex3f, surface->groupmesh->data_element3i, surface->groupmesh->data_neighbor3i, relativelightorigin, projectdistance, numshadowmark, shadowmarklist);
 767                 }
 768         }
 769 }
 770
 771 #define RSURF_MAX_BATCHSURFACES 1024
 772
 773 void R_Q1BSP_DrawLight(entity_render_t *ent, float *lightcolorbase, float *lightcolorpants, float *lightcolorshirt, int numsurfaces, const int *surfacelist)
 774 {
 775         model_t *model = ent->model;
 776         msurface_t *surface;
 777         texture_t *texture;
 778         int surfacelistindex, batchnumsurfaces;
 779         msurface_t *batchsurfacelist[RSURF_MAX_BATCHSURFACES];
 780         vec3_t modelorg;
 781         texture_t *tex;
 782         rtexture_t *basetexture = NULL;
 783         rtexture_t *glosstexture = NULL;
 784         float specularscale = 0;
 785         qboolean skip;
 786         if (r_drawcollisionbrushes.integer >= 2)
 787                 return;
 788         if (VectorLength2(lightcolorbase) + VectorLength2(lightcolorpants) + VectorLength2(lightcolorshirt) < 0.0001)
 789                 return;
 790         R_UpdateAllTextureInfo(ent);
 791         Matrix4x4_Transform(&ent->inversematrix, r_vieworigin, modelorg);
 792         tex = NULL;
 793         texture = NULL;
 794         skip = false;
 795         batchnumsurfaces = 0;
 796         for (surfacelistindex = 0;surfacelistindex < numsurfaces;surfacelistindex++)
 797         {
 798                 if ((ent == r_refdef.worldentity && !r_worldsurfacevisible[surfacelist[surfacelistindex]]))
 799                         continue;
 800                 surface = model->data_surfaces + surfacelist[surfacelistindex];
 801                 renderstats.lights_lighttriangles += surface->num_triangles;
 802                 if (tex != surface->texture)
 803                 {
 804                         if (batchnumsurfaces > 0)
 805                         {
 806                                 R_Shadow_RenderSurfacesLighting(ent, texture, batchnumsurfaces, batchsurfacelist, lightcolorbase, lightcolorpants, lightcolorshirt, basetexture, texture->skin.pants, texture->skin.shirt, texture->skin.nmap, glosstexture, specularscale, modelorg);
 807                                 batchnumsurfaces = 0;
 808                         }
 809                         tex = surface->texture;
 810                         texture = surface->texture->currentframe;
 811                         // FIXME: transparent surfaces need to be lit later
 812                         skip = (texture->currentmaterialflags & (MATERIALFLAG_WALL | MATERIALFLAG_TRANSPARENT)) != MATERIALFLAG_WALL;
 813                         if (skip)
 814                                 continue;
 815                         if (texture->textureflags & Q3TEXTUREFLAG_TWOSIDED)
 816                                 qglDisable(GL_CULL_FACE);
 817                         else
 818                                 qglEnable(GL_CULL_FACE);
 819                         glosstexture = r_texture_black;
 820                         specularscale = 0;
 821                         if (texture->skin.gloss)
 822                         {
 823                                 if (r_shadow_gloss.integer >= 1 && r_shadow_glossintensity.value > 0 && r_shadow_rtlight->specularscale > 0)
 824                                 {
 825                                         glosstexture = texture->skin.gloss;
 826                                         specularscale = r_shadow_rtlight->specularscale * r_shadow_glossintensity.value;
 827                                 }
 828                         }
 829                         else
 830                         {
 831                                 if (r_shadow_gloss.integer >= 2 && r_shadow_gloss2intensity.value > 0 && r_shadow_glossintensity.value > 0 && r_shadow_rtlight->specularscale > 0)
 832                                 {
 833                                         glosstexture = r_texture_white;
 834                                         specularscale = r_shadow_rtlight->specularscale * r_shadow_gloss2intensity.value;
 835                                 }
 836                         }
 837                         basetexture = (ent->colormap < 0 && texture->skin.merged) ? texture->skin.merged : texture->skin.base;
 838                         if ((r_shadow_rtlight->ambientscale + r_shadow_rtlight->diffusescale) * (VectorLength2(lightcolorbase) + VectorLength2(lightcolorpants) + VectorLength2(lightcolorshirt)) + specularscale * VectorLength2(lightcolorbase) < (1.0f / 1048576.0f))
 839                                 skip = true;
 840                 }
 841                 if (!skip && surface->num_triangles)
 842                 {
 843                         if (batchnumsurfaces == RSURF_MAX_BATCHSURFACES)
 844                         {
 845                                 R_Shadow_RenderSurfacesLighting(ent, texture, batchnumsurfaces, batchsurfacelist, lightcolorbase, lightcolorpants, lightcolorshirt, basetexture, texture->skin.pants, texture->skin.shirt, texture->skin.nmap, glosstexture, specularscale, modelorg);
 846                                 batchnumsurfaces = 0;
 847                         }
 848                         batchsurfacelist[batchnumsurfaces++] = surface;
 849                 }
 850         }
 851         if (batchnumsurfaces > 0)
 852         {
 853                 R_Shadow_RenderSurfacesLighting(ent, texture, batchnumsurfaces, batchsurfacelist, lightcolorbase, lightcolorpants, lightcolorshirt, basetexture, texture->skin.pants, texture->skin.shirt, texture->skin.nmap, glosstexture, specularscale, modelorg);
 854                 batchnumsurfaces = 0;
 855         }
 856         qglEnable(GL_CULL_FACE);
 857 }
 858
 859 #if 0
 860 static void gl_surf_start(void)
 861 {
 862 }
 863
 864 static void gl_surf_shutdown(void)
 865 {
 866 }
 867
 868 static void gl_surf_newmap(void)
 869 {
 870 }
 871 #endif
 872
 873 void GL_Surf_Init(void)
 874 {
 875
 876         Cvar_RegisterVariable(&r_ambient);
 877         Cvar_RegisterVariable(&r_drawportals);
 878         Cvar_RegisterVariable(&r_lockpvs);
 879         Cvar_RegisterVariable(&r_lockvisibility);
 880         Cvar_RegisterVariable(&r_useportalculling);
 881         Cvar_RegisterVariable(&r_drawcollisionbrushes_polygonfactor);
 882         Cvar_RegisterVariable(&r_drawcollisionbrushes_polygonoffset);
 883         Cvar_RegisterVariable(&r_q3bsp_renderskydepth);
 884
 885         //R_RegisterModule("GL_Surf", gl_surf_start, gl_surf_shutdown, gl_surf_newmap);
 886 }
 887