r_shadow.c

   1
   2 #include "quakedef.h"
   3 #include "r_shadow.h"
   4 #include "cl_collision.h"
   5
   6 extern void R_Shadow_EditLights_Init(void);
   7
   8 #define SHADOWSTAGE_NONE 0
   9 #define SHADOWSTAGE_STENCIL 1
  10 #define SHADOWSTAGE_LIGHT 2
  11 #define SHADOWSTAGE_ERASESTENCIL 3
  12
  13 int r_shadowstage = SHADOWSTAGE_NONE;
  14 int r_shadow_reloadlights = false;
  15
  16 int r_shadow_lightingmode = 0;
  17
  18 mempool_t *r_shadow_mempool;
  19
  20 int maxshadowelements;
  21 int *shadowelements;
  22 int maxtrianglefacinglight;
  23 qbyte *trianglefacinglight;
  24
  25 rtexturepool_t *r_shadow_texturepool;
  26 rtexture_t *r_shadow_normalsattenuationtexture;
  27 rtexture_t *r_shadow_normalscubetexture;
  28 rtexture_t *r_shadow_attenuation2dtexture;
  29 rtexture_t *r_shadow_blankbumptexture;
  30 rtexture_t *r_shadow_blankglosstexture;
  31 rtexture_t *r_shadow_blankwhitetexture;
  32
  33 cvar_t r_shadow_lightattenuationscale = {0, "r_shadow_lightattenuationscale", "2"};
  34 cvar_t r_shadow_lightintensityscale = {0, "r_shadow_lightintensityscale", "1"};
  35 cvar_t r_shadow_realtime = {0, "r_shadow_realtime", "0"};
  36 cvar_t r_shadow_erasebydrawing = {0, "r_shadow_erasebydrawing", "0"};
  37 cvar_t r_shadow_texture3d = {0, "r_shadow_texture3d", "0"};
  38 cvar_t r_shadow_gloss = {0, "r_shadow_gloss", "1"};
  39 cvar_t r_shadow_debuglight = {0, "r_shadow_debuglight", "-1"};
  40 cvar_t r_shadow_scissor = {0, "r_shadow_scissor", "1"};
  41
  42 void R_Shadow_ClearWorldLights(void);
  43 void R_Shadow_SaveWorldLights(void);
  44 void R_Shadow_LoadWorldLights(void);
  45 void R_Shadow_LoadLightsFile(void);
  46 void R_Shadow_LoadWorldLightsFromMap_LightArghliteTyrlite(void);
  47
  48 void r_shadow_start(void)
  49 {
  50         // allocate vertex processing arrays
  51         r_shadow_mempool = Mem_AllocPool("R_Shadow");
  52         maxshadowelements = 0;
  53         shadowelements = NULL;
  54         maxtrianglefacinglight = 0;
  55         trianglefacinglight = NULL;
  56         r_shadow_normalsattenuationtexture = NULL;
  57         r_shadow_normalscubetexture = NULL;
  58         r_shadow_attenuation2dtexture = NULL;
  59         r_shadow_blankbumptexture = NULL;
  60         r_shadow_blankglosstexture = NULL;
  61         r_shadow_blankwhitetexture = NULL;
  62         r_shadow_texturepool = NULL;
  63         R_Shadow_ClearWorldLights();
  64         r_shadow_reloadlights = true;
  65 }
  66
  67 void r_shadow_shutdown(void)
  68 {
  69         R_Shadow_ClearWorldLights();
  70         r_shadow_reloadlights = true;
  71         r_shadow_normalsattenuationtexture = NULL;
  72         r_shadow_normalscubetexture = NULL;
  73         r_shadow_attenuation2dtexture = NULL;
  74         r_shadow_blankbumptexture = NULL;
  75         r_shadow_blankglosstexture = NULL;
  76         r_shadow_blankwhitetexture = NULL;
  77         R_FreeTexturePool(&r_shadow_texturepool);
  78         maxshadowelements = 0;
  79         shadowelements = NULL;
  80         maxtrianglefacinglight = 0;
  81         trianglefacinglight = NULL;
  82         Mem_FreePool(&r_shadow_mempool);
  83 }
  84
  85 void r_shadow_newmap(void)
  86 {
  87         R_Shadow_ClearWorldLights();
  88         r_shadow_reloadlights = true;
  89 }
  90
  91 void R_Shadow_Init(void)
  92 {
  93         Cvar_RegisterVariable(&r_shadow_lightattenuationscale);
  94         Cvar_RegisterVariable(&r_shadow_lightintensityscale);
  95         Cvar_RegisterVariable(&r_shadow_realtime);
  96         Cvar_RegisterVariable(&r_shadow_texture3d);
  97         Cvar_RegisterVariable(&r_shadow_gloss);
  98         Cvar_RegisterVariable(&r_shadow_debuglight);
  99         Cvar_RegisterVariable(&r_shadow_erasebydrawing);
 100         Cvar_RegisterVariable(&r_shadow_scissor);
 101         R_Shadow_EditLights_Init();
 102         R_RegisterModule("R_Shadow", r_shadow_start, r_shadow_shutdown, r_shadow_newmap);
 103 }
 104
 105 void R_Shadow_ProjectVertices(const float *in, float *out, int numverts, const float *relativelightorigin, float projectdistance)
 106 {
 107         int i;
 108         for (i = 0;i < numverts;i++, in += 4, out += 4)
 109         {
 110 #if 1
 111                 out[0] = in[0] + 1000000.0f * (in[0] - relativelightorigin[0]);
 112                 out[1] = in[1] + 1000000.0f * (in[1] - relativelightorigin[1]);
 113                 out[2] = in[2] + 1000000.0f * (in[2] - relativelightorigin[2]);
 114 #elif 0
 115                 VectorSubtract(in, relativelightorigin, temp);
 116                 f = lightradius / sqrt(DotProduct(temp,temp));
 117                 if (f < 1)
 118                         f = 1;
 119                 VectorMA(relativelightorigin, f, temp, out);
 120 #else
 121                 VectorSubtract(in, relativelightorigin, temp);
 122                 f = projectdistance / sqrt(DotProduct(temp,temp));
 123                 VectorMA(in, f, temp, out);
 124 #endif
 125         }
 126 }
 127
 128 void R_Shadow_MakeTriangleShadowFlags(const int *elements, const float *vertex, int numtris, qbyte *trianglefacinglight, const float *relativelightorigin, float lightradius)
 129 {
 130         int i;
 131         const float *v0, *v1, *v2;
 132         for (i = 0;i < numtris;i++, elements += 3)
 133         {
 134                 // calculate triangle facing flag
 135                 v0 = vertex + elements[0] * 4;
 136                 v1 = vertex + elements[1] * 4;
 137                 v2 = vertex + elements[2] * 4;
 138                 // we do not need to normalize the surface normal because both sides
 139                 // of the comparison use it, therefore they are both multiplied the
 140                 // same amount...  furthermore the subtract can be done on the
 141                 // vectors, saving a little bit of math in the dotproducts
 142 #if 0
 143                 // fast version
 144                 // subtracts v1 from v0 and v2, combined into a crossproduct,
 145                 // combined with a dotproduct of the light location relative to the
 146                 // first point of the triangle (any point works, since the triangle
 147                 // is obviously flat), and finally a comparison to determine if the
 148                 // light is infront of the triangle (the goal of this statement)
 149                 trianglefacinglight[i] =
 150                    (relativelightorigin[0] - v0[0]) * ((v0[1] - v1[1]) * (v2[2] - v1[2]) - (v0[2] - v1[2]) * (v2[1] - v1[1]))
 151                  + (relativelightorigin[1] - v0[1]) * ((v0[2] - v1[2]) * (v2[0] - v1[0]) - (v0[0] - v1[0]) * (v2[2] - v1[2]))
 152                  + (relativelightorigin[2] - v0[2]) * ((v0[0] - v1[0]) * (v2[1] - v1[1]) - (v0[1] - v1[1]) * (v2[0] - v1[0])) > 0;
 153 #else
 154                 // readable version
 155                 {
 156                 float dir0[3], dir1[3], temp[3], f;
 157
 158                 // calculate two mostly perpendicular edge directions
 159                 VectorSubtract(v0, v1, dir0);
 160                 VectorSubtract(v2, v1, dir1);
 161
 162                 // we have two edge directions, we can calculate a third vector from
 163                 // them, which is the direction of the surface normal (it's magnitude
 164                 // is not 1 however)
 165                 CrossProduct(dir0, dir1, temp);
 166
 167                 // this is entirely unnecessary, but kept for clarity
 168                 //VectorNormalize(temp);
 169
 170                 // compare distance of light along normal, with distance of any point
 171                 // of the triangle along the same normal (the triangle is planar,
 172                 // I.E. flat, so all points give the same answer)
 173                 // the normal is not normalized because it is used on both sides of
 174                 // the comparison, so it's magnitude does not matter
 175                 //trianglefacinglight[i] = DotProduct(relativelightorigin, temp) >= DotProduct(v0, temp);
 176                 f = DotProduct(relativelightorigin, temp) - DotProduct(v0, temp);
 177                 trianglefacinglight[i] = f > 0 && f < lightradius * sqrt(DotProduct(temp, temp));
 178                 }
 179 #endif
 180         }
 181 }
 182
 183 int R_Shadow_BuildShadowVolumeTriangles(const int *elements, const int *neighbors, int numtris, int numverts, const qbyte *trianglefacinglight, int *out)
 184 {
 185         int i, tris;
 186         // check each frontface for bordering backfaces,
 187         // and cast shadow polygons from those edges,
 188         // also create front and back caps for shadow volume
 189         tris = 0;
 190         for (i = 0;i < numtris;i++, elements += 3, neighbors += 3)
 191         {
 192                 if (trianglefacinglight[i])
 193                 {
 194                         // triangle is frontface and therefore casts shadow,
 195                         // output front and back caps for shadow volume
 196                         // front cap
 197                         out[0] = elements[0];
 198                         out[1] = elements[1];
 199                         out[2] = elements[2];
 200                         // rear cap (with flipped winding order)
 201                         out[3] = elements[0] + numverts;
 202                         out[4] = elements[2] + numverts;
 203                         out[5] = elements[1] + numverts;
 204                         out += 6;
 205                         tris += 2;
 206                         // check the edges
 207                         if (neighbors[0] < 0 || !trianglefacinglight[neighbors[0]])
 208                         {
 209                                 out[0] = elements[1];
 210                                 out[1] = elements[0];
 211                                 out[2] = elements[0] + numverts;
 212                                 out[3] = elements[1];
 213                                 out[4] = elements[0] + numverts;
 214                                 out[5] = elements[1] + numverts;
 215                                 out += 6;
 216                                 tris += 2;
 217                         }
 218                         if (neighbors[1] < 0 || !trianglefacinglight[neighbors[1]])
 219                         {
 220                                 out[0] = elements[2];
 221                                 out[1] = elements[1];
 222                                 out[2] = elements[1] + numverts;
 223                                 out[3] = elements[2];
 224                                 out[4] = elements[1] + numverts;
 225                                 out[5] = elements[2] + numverts;
 226                                 out += 6;
 227                                 tris += 2;
 228                         }
 229                         if (neighbors[2] < 0 || !trianglefacinglight[neighbors[2]])
 230                         {
 231                                 out[0] = elements[0];
 232                                 out[1] = elements[2];
 233                                 out[2] = elements[2] + numverts;
 234                                 out[3] = elements[0];
 235                                 out[4] = elements[2] + numverts;
 236                                 out[5] = elements[0] + numverts;
 237                                 out += 6;
 238                                 tris += 2;
 239                         }
 240                 }
 241         }
 242         return tris;
 243 }
 244
 245 void R_Shadow_ResizeTriangleFacingLight(int numtris)
 246 {
 247         // make sure trianglefacinglight is big enough for this volume
 248         if (maxtrianglefacinglight < numtris)
 249         {
 250                 maxtrianglefacinglight = numtris;
 251                 if (trianglefacinglight)
 252                         Mem_Free(trianglefacinglight);
 253                 trianglefacinglight = Mem_Alloc(r_shadow_mempool, maxtrianglefacinglight);
 254         }
 255 }
 256
 257 void R_Shadow_ResizeShadowElements(int numtris)
 258 {
 259         // make sure shadowelements is big enough for this volume
 260         if (maxshadowelements < numtris * 24)
 261         {
 262                 maxshadowelements = numtris * 24;
 263                 if (shadowelements)
 264                         Mem_Free(shadowelements);
 265                 shadowelements = Mem_Alloc(r_shadow_mempool, maxshadowelements * sizeof(int));
 266         }
 267 }
 268
 269 void R_Shadow_Volume(int numverts, int numtris, int *elements, int *neighbors, vec3_t relativelightorigin, float lightradius, float projectdistance)
 270 {
 271         int tris;
 272         if (projectdistance < 0.1)
 273         {
 274                 Con_Printf("R_Shadow_Volume: projectdistance %f\n");
 275                 return;
 276         }
 277 // terminology:
 278 //
 279 // frontface:
 280 // a triangle facing the light source
 281 //
 282 // backface:
 283 // a triangle not facing the light source
 284 //
 285 // shadow volume:
 286 // an extrusion of the frontfaces, beginning at the original geometry and
 287 // ending further from the light source than the original geometry
 288 // (presumably at least as far as the light's radius, if the light has a
 289 // radius at all), capped at both front and back to avoid any problems
 290 //
 291 // description:
 292 // draws the shadow volumes of the model.
 293 // requirements:
 294 // vertex locations must already be in varray_vertex before use.
 295 // varray_vertex must have capacity for numverts * 2.
 296
 297         // make sure trianglefacinglight is big enough for this volume
 298         if (maxtrianglefacinglight < numtris)
 299                 R_Shadow_ResizeTriangleFacingLight(numtris);
 300
 301         // make sure shadowelements is big enough for this volume
 302         if (maxshadowelements < numtris * 24)
 303                 R_Shadow_ResizeShadowElements(numtris);
 304
 305         // generate projected vertices
 306         // by clever use of elements we'll construct the whole shadow from
 307         // the unprojected vertices and these projected vertices
 308         R_Shadow_ProjectVertices(varray_vertex, varray_vertex + numverts * 4, numverts, relativelightorigin, projectdistance);
 309
 310         // check which triangles are facing the light
 311         R_Shadow_MakeTriangleShadowFlags(elements, varray_vertex, numtris, trianglefacinglight, relativelightorigin, lightradius);
 312
 313         // output triangle elements
 314         tris = R_Shadow_BuildShadowVolumeTriangles(elements, neighbors, numtris, numverts, trianglefacinglight, shadowelements);
 315         R_Shadow_RenderVolume(numverts * 2, tris, shadowelements);
 316 }
 317
 318 void R_Shadow_RenderVolume(int numverts, int numtris, int *elements)
 319 {
 320         if (!numverts || !numtris)
 321                 return;
 322         if (r_shadowstage == SHADOWSTAGE_STENCIL)
 323         {
 324                 // increment stencil if backface is behind depthbuffer
 325                 qglCullFace(GL_BACK); // quake is backwards, this culls front faces
 326                 qglStencilOp(GL_KEEP, GL_INCR, GL_KEEP);
 327                 R_Mesh_Draw(numverts, numtris, elements);
 328                 // decrement stencil if frontface is behind depthbuffer
 329                 qglCullFace(GL_FRONT); // quake is backwards, this culls back faces
 330                 qglStencilOp(GL_KEEP, GL_DECR, GL_KEEP);
 331         }
 332         R_Mesh_Draw(numverts, numtris, elements);
 333 }
 334
 335 void R_Shadow_RenderShadowMeshVolume(shadowmesh_t *firstmesh)
 336 {
 337         shadowmesh_t *mesh;
 338         if (r_shadowstage == SHADOWSTAGE_STENCIL)
 339         {
 340                 // increment stencil if backface is behind depthbuffer
 341                 qglCullFace(GL_BACK); // quake is backwards, this culls front faces
 342                 qglStencilOp(GL_KEEP, GL_INCR, GL_KEEP);
 343                 for (mesh = firstmesh;mesh;mesh = mesh->next)
 344                 {
 345                         R_Mesh_ResizeCheck(mesh->numverts);
 346                         memcpy(varray_vertex, mesh->verts, mesh->numverts * sizeof(float[4]));
 347                         R_Mesh_Draw(mesh->numverts, mesh->numtriangles, mesh->elements);
 348                 }
 349                 // decrement stencil if frontface is behind depthbuffer
 350                 qglCullFace(GL_FRONT); // quake is backwards, this culls back faces
 351                 qglStencilOp(GL_KEEP, GL_DECR, GL_KEEP);
 352         }
 353         for (mesh = firstmesh;mesh;mesh = mesh->next)
 354         {
 355                 R_Mesh_ResizeCheck(mesh->numverts);
 356                 memcpy(varray_vertex, mesh->verts, mesh->numverts * sizeof(float[4]));
 357                 R_Mesh_Draw(mesh->numverts, mesh->numtriangles, mesh->elements);
 358         }
 359 }
 360
 361 float r_shadow_atten1;
 362 #define ATTEN3DSIZE 64
 363 static void R_Shadow_Make3DTextures(void)
 364 {
 365         int x, y, z;
 366         float v[3], intensity, ilen, bordercolor[4];
 367         qbyte *data;
 368         if (r_shadow_texture3d.integer != 1 || !gl_texture3d)
 369                 return;
 370         data = Mem_Alloc(tempmempool, ATTEN3DSIZE * ATTEN3DSIZE * ATTEN3DSIZE * 4);
 371         for (z = 0;z < ATTEN3DSIZE;z++)
 372         {
 373                 for (y = 0;y < ATTEN3DSIZE;y++)
 374                 {
 375                         for (x = 0;x < ATTEN3DSIZE;x++)
 376                         {
 377                                 v[0] = (x + 0.5f) * (2.0f / (float) ATTEN3DSIZE) - 1.0f;
 378                                 v[1] = (y + 0.5f) * (2.0f / (float) ATTEN3DSIZE) - 1.0f;
 379                                 v[2] = (z + 0.5f) * (2.0f / (float) ATTEN3DSIZE) - 1.0f;
 380                                 intensity = 1.0f - sqrt(DotProduct(v, v));
 381                                 if (intensity > 0)
 382                                         intensity *= intensity;
 383                                 ilen = 127.0f * bound(0, intensity * r_shadow_atten1, 1) / sqrt(DotProduct(v, v));
 384                                 data[((z*ATTEN3DSIZE+y)*ATTEN3DSIZE+x)*4+0] = 128.0f + ilen * v[0];
 385                                 data[((z*ATTEN3DSIZE+y)*ATTEN3DSIZE+x)*4+1] = 128.0f + ilen * v[1];
 386                                 data[((z*ATTEN3DSIZE+y)*ATTEN3DSIZE+x)*4+2] = 128.0f + ilen * v[2];
 387                                 data[((z*ATTEN3DSIZE+y)*ATTEN3DSIZE+x)*4+3] = 255;
 388                         }
 389                 }
 390         }
 391         r_shadow_normalsattenuationtexture = R_LoadTexture3D(r_shadow_texturepool, "normalsattenuation", ATTEN3DSIZE, ATTEN3DSIZE, ATTEN3DSIZE, data, TEXTYPE_RGBA, TEXF_PRECACHE | TEXF_CLAMP | TEXF_ALWAYSPRECACHE, NULL);
 392         bordercolor[0] = 0.5f;
 393         bordercolor[1] = 0.5f;
 394         bordercolor[2] = 0.5f;
 395         bordercolor[3] = 1.0f;
 396         qglTexParameterfv(GL_TEXTURE_3D, GL_TEXTURE_BORDER_COLOR, bordercolor);
 397         Mem_Free(data);
 398 }
 399
 400 static void R_Shadow_MakeTextures(void)
 401 {
 402         int x, y, d, side;
 403         float v[3], s, t, intensity;
 404         qbyte *data;
 405         data = Mem_Alloc(tempmempool, 6*128*128*4);
 406         R_FreeTexturePool(&r_shadow_texturepool);
 407         r_shadow_texturepool = R_AllocTexturePool();
 408         r_shadow_atten1 = r_shadow_lightattenuationscale.value;
 409         data[0] = 128;
 410         data[1] = 128;
 411         data[2] = 255;
 412         data[3] = 255;
 413         r_shadow_blankbumptexture = R_LoadTexture2D(r_shadow_texturepool, "blankbump", 1, 1, data, TEXTYPE_RGBA, TEXF_PRECACHE, NULL);
 414         data[0] = 255;
 415         data[1] = 255;
 416         data[2] = 255;
 417         data[3] = 255;
 418         r_shadow_blankglosstexture = R_LoadTexture2D(r_shadow_texturepool, "blankgloss", 1, 1, data, TEXTYPE_RGBA, TEXF_PRECACHE, NULL);
 419         data[0] = 255;
 420         data[1] = 255;
 421         data[2] = 255;
 422         data[3] = 255;
 423         r_shadow_blankwhitetexture = R_LoadTexture2D(r_shadow_texturepool, "blankwhite", 1, 1, data, TEXTYPE_RGBA, TEXF_PRECACHE, NULL);
 424         for (side = 0;side < 6;side++)
 425         {
 426                 for (y = 0;y < 128;y++)
 427                 {
 428                         for (x = 0;x < 128;x++)
 429                         {
 430                                 s = (x + 0.5f) * (2.0f / 128.0f) - 1.0f;
 431                                 t = (y + 0.5f) * (2.0f / 128.0f) - 1.0f;
 432                                 switch(side)
 433                                 {
 434                                 case 0:
 435                                         v[0] = 1;
 436                                         v[1] = -t;
 437                                         v[2] = -s;
 438                                         break;
 439                                 case 1:
 440                                         v[0] = -1;
 441                                         v[1] = -t;
 442                                         v[2] = s;
 443                                         break;
 444                                 case 2:
 445                                         v[0] = s;
 446                                         v[1] = 1;
 447                                         v[2] = t;
 448                                         break;
 449                                 case 3:
 450                                         v[0] = s;
 451                                         v[1] = -1;
 452                                         v[2] = -t;
 453                                         break;
 454                                 case 4:
 455                                         v[0] = s;
 456                                         v[1] = -t;
 457                                         v[2] = 1;
 458                                         break;
 459                                 case 5:
 460                                         v[0] = -s;
 461                                         v[1] = -t;
 462                                         v[2] = -1;
 463                                         break;
 464                                 }
 465                                 intensity = 127.0f / sqrt(DotProduct(v, v));
 466                                 data[((side*128+y)*128+x)*4+0] = 128.0f + intensity * v[0];
 467                                 data[((side*128+y)*128+x)*4+1] = 128.0f + intensity * v[1];
 468                                 data[((side*128+y)*128+x)*4+2] = 128.0f + intensity * v[2];
 469                                 data[((side*128+y)*128+x)*4+3] = 255;
 470                         }
 471                 }
 472         }
 473         r_shadow_normalscubetexture = R_LoadTextureCubeMap(r_shadow_texturepool, "normalscube", 128, data, TEXTYPE_RGBA, TEXF_PRECACHE | TEXF_CLAMP, NULL);
 474         for (y = 0;y < 128;y++)
 475         {
 476                 for (x = 0;x < 128;x++)
 477                 {
 478                         v[0] = (x + 0.5f) * (2.0f / 128.0f) - 1.0f;
 479                         v[1] = (y + 0.5f) * (2.0f / 128.0f) - 1.0f;
 480                         v[2] = 0;
 481                         intensity = 1.0f - sqrt(DotProduct(v, v));
 482                         if (intensity > 0)
 483                                 intensity *= intensity;
 484                         intensity = bound(0, intensity * r_shadow_atten1 * 256.0f, 255.0f);
 485                         d = bound(0, intensity, 255);
 486                         data[((0*128+y)*128+x)*4+0] = d;
 487                         data[((0*128+y)*128+x)*4+1] = d;
 488                         data[((0*128+y)*128+x)*4+2] = d;
 489                         data[((0*128+y)*128+x)*4+3] = d;
 490                 }
 491         }
 492         r_shadow_attenuation2dtexture = R_LoadTexture2D(r_shadow_texturepool, "attenuation2d", 128, 128, data, TEXTYPE_RGBA, TEXF_PRECACHE | TEXF_CLAMP | TEXF_ALPHA | TEXF_MIPMAP, NULL);
 493         Mem_Free(data);
 494         R_Shadow_Make3DTextures();
 495 }
 496
 497 void R_Shadow_Stage_Begin(void)
 498 {
 499         rmeshstate_t m;
 500
 501         if (r_shadow_texture3d.integer == 1 && !gl_texture3d)
 502         {
 503                 Con_Printf("3D texture support not detected, falling back on slower 2D + 1D + normalization lighting\n");
 504                 Cvar_SetValueQuick(&r_shadow_texture3d, 0);
 505         }
 506         //cl.worldmodel->numlights = min(cl.worldmodel->numlights, 1);
 507         if (!r_shadow_attenuation2dtexture
 508          || (r_shadow_texture3d.integer == 1 && !r_shadow_normalsattenuationtexture)
 509          || r_shadow_lightattenuationscale.value != r_shadow_atten1)
 510                 R_Shadow_MakeTextures();
 511         if (r_shadow_reloadlights && cl.worldmodel)
 512         {
 513                 r_shadow_reloadlights = false;
 514                 R_Shadow_LoadWorldLights();
 515                 if (r_shadow_worldlightchain == NULL)
 516                 {
 517                         R_Shadow_LoadLightsFile();
 518                         if (r_shadow_worldlightchain == NULL)
 519                                 R_Shadow_LoadWorldLightsFromMap_LightArghliteTyrlite();
 520                 }
 521         }
 522
 523         memset(&m, 0, sizeof(m));
 524         m.blendfunc1 = GL_ONE;
 525         m.blendfunc2 = GL_ZERO;
 526         R_Mesh_State(&m);
 527         GL_Color(0, 0, 0, 1);
 528         r_shadowstage = SHADOWSTAGE_NONE;
 529 }
 530
 531 void R_Shadow_Stage_ShadowVolumes(void)
 532 {
 533         rmeshstate_t m;
 534         memset(&m, 0, sizeof(m));
 535         R_Mesh_TextureState(&m);
 536         GL_Color(1, 1, 1, 1);
 537         qglColorMask(0, 0, 0, 0);
 538         qglDisable(GL_BLEND);
 539         qglDepthMask(0);
 540         qglDepthFunc(GL_LESS);
 541         qglEnable(GL_STENCIL_TEST);
 542         qglStencilOp(GL_KEEP, GL_KEEP, GL_KEEP);
 543         qglStencilFunc(GL_ALWAYS, 0, 0xFF);
 544         qglEnable(GL_CULL_FACE);
 545         qglEnable(GL_DEPTH_TEST);
 546         r_shadowstage = SHADOWSTAGE_STENCIL;
 547         if (!r_shadow_erasebydrawing.integer)
 548                 qglClear(GL_STENCIL_BUFFER_BIT);
 549 }
 550
 551 void R_Shadow_Stage_Light(void)
 552 {
 553         rmeshstate_t m;
 554         memset(&m, 0, sizeof(m));
 555         R_Mesh_TextureState(&m);
 556         qglActiveTexture(GL_TEXTURE0_ARB);
 557
 558         qglEnable(GL_BLEND);
 559         qglBlendFunc(GL_ONE, GL_ONE);
 560         GL_Color(1, 1, 1, 1);
 561         qglColorMask(1, 1, 1, 1);
 562         qglDepthMask(0);
 563         qglDepthFunc(GL_EQUAL);
 564         qglEnable(GL_STENCIL_TEST);
 565         qglStencilOp(GL_KEEP, GL_KEEP, GL_KEEP);
 566         // only draw light where this geometry was already rendered AND the
 567         // stencil is 0 (non-zero means shadow)
 568         qglStencilFunc(GL_EQUAL, 0, 0xFF);
 569         qglEnable(GL_CULL_FACE);
 570         qglEnable(GL_DEPTH_TEST);
 571         r_shadowstage = SHADOWSTAGE_LIGHT;
 572 }
 573
 574 int R_Shadow_Stage_EraseShadowVolumes(void)
 575 {
 576         if (r_shadow_erasebydrawing.integer)
 577         {
 578                 rmeshstate_t m;
 579                 memset(&m, 0, sizeof(m));
 580                 R_Mesh_TextureState(&m);
 581                 GL_Color(1, 1, 1, 1);
 582                 qglColorMask(0, 0, 0, 0);
 583                 qglDisable(GL_BLEND);
 584                 qglDepthMask(0);
 585                 qglDepthFunc(GL_LESS);
 586                 qglEnable(GL_STENCIL_TEST);
 587                 qglStencilOp(GL_ZERO, GL_ZERO, GL_ZERO);
 588                 qglStencilFunc(GL_ALWAYS, 0, 0xFF);
 589                 qglDisable(GL_CULL_FACE);
 590                 qglDisable(GL_DEPTH_TEST);
 591                 r_shadowstage = SHADOWSTAGE_ERASESTENCIL;
 592                 return true;
 593         }
 594         else
 595                 return false;
 596 }
 597
 598 void R_Shadow_Stage_End(void)
 599 {
 600         rmeshstate_t m;
 601         // attempt to restore state to what Mesh_State thinks it is
 602         qglDisable(GL_BLEND);
 603         qglBlendFunc(GL_ONE, GL_ZERO);
 604         qglDepthMask(1);
 605         // now restore the rest of the state to normal
 606         GL_Color(1, 1, 1, 1);
 607         qglColorMask(1, 1, 1, 1);
 608         qglDisable(GL_SCISSOR_TEST);
 609         qglDepthFunc(GL_LEQUAL);
 610         qglDisable(GL_STENCIL_TEST);
 611         qglStencilOp(GL_KEEP, GL_KEEP, GL_KEEP);
 612         qglStencilFunc(GL_ALWAYS, 0, 0xFF);
 613         qglEnable(GL_CULL_FACE);
 614         qglEnable(GL_DEPTH_TEST);
 615         // force mesh state to reset by using various combinations of features
 616         memset(&m, 0, sizeof(m));
 617         m.blendfunc1 = GL_SRC_ALPHA;
 618         m.blendfunc2 = GL_ONE_MINUS_SRC_ALPHA;
 619         R_Mesh_State(&m);
 620         m.blendfunc1 = GL_ONE;
 621         m.blendfunc2 = GL_ZERO;
 622         R_Mesh_State(&m);
 623         r_shadowstage = SHADOWSTAGE_NONE;
 624 }
 625
 626 int R_Shadow_ScissorForBBoxAndSphere(const float *mins, const float *maxs, const float *origin, float radius)
 627 {
 628         int i, ix1, iy1, ix2, iy2;
 629         float x1, y1, x2, y2, x, y;
 630         vec3_t smins, smaxs;
 631         vec4_t v, v2;
 632         if (!r_shadow_scissor.integer)
 633                 return false;
 634         // if view is inside the box, just say yes it's visible
 635         if (r_origin[0] >= mins[0] && r_origin[0] <= maxs[0]
 636          && r_origin[1] >= mins[1] && r_origin[1] <= maxs[1]
 637          && r_origin[2] >= mins[2] && r_origin[2] <= maxs[2])
 638         {
 639                 qglDisable(GL_SCISSOR_TEST);
 640                 return false;
 641         }
 642         VectorSubtract(r_origin, origin, v);
 643         if (DotProduct(v, v) < radius * radius)
 644         {
 645                 qglDisable(GL_SCISSOR_TEST);
 646                 return false;
 647         }
 648         // create viewspace bbox
 649         for (i = 0;i < 8;i++)
 650         {
 651                 v[0] = ((i & 1) ? mins[0] : maxs[0]) - r_origin[0];
 652                 v[1] = ((i & 2) ? mins[1] : maxs[1]) - r_origin[1];
 653                 v[2] = ((i & 4) ? mins[2] : maxs[2]) - r_origin[2];
 654                 v2[0] = DotProduct(v, vright);
 655                 v2[1] = DotProduct(v, vup);
 656                 v2[2] = DotProduct(v, vpn);
 657                 if (i)
 658                 {
 659                         if (smins[0] > v2[0]) smins[0] = v2[0];
 660                         if (smaxs[0] < v2[0]) smaxs[0] = v2[0];
 661                         if (smins[1] > v2[1]) smins[1] = v2[1];
 662                         if (smaxs[1] < v2[1]) smaxs[1] = v2[1];
 663                         if (smins[2] > v2[2]) smins[2] = v2[2];
 664                         if (smaxs[2] < v2[2]) smaxs[2] = v2[2];
 665                 }
 666                 else
 667                 {
 668                         smins[0] = smaxs[0] = v2[0];
 669                         smins[1] = smaxs[1] = v2[1];
 670                         smins[2] = smaxs[2] = v2[2];
 671                 }
 672         }
 673         // now we have a bbox in viewspace
 674         // clip it to the viewspace version of the sphere
 675         v[0] = origin[0] - r_origin[0];
 676         v[1] = origin[1] - r_origin[1];
 677         v[2] = origin[2] - r_origin[2];
 678         v2[0] = DotProduct(v, vright);
 679         v2[1] = DotProduct(v, vup);
 680         v2[2] = DotProduct(v, vpn);
 681         if (smins[0] < v2[0] - radius) smins[0] = v2[0] - radius;
 682         if (smaxs[0] < v2[0] - radius) smaxs[0] = v2[0] + radius;
 683         if (smins[1] < v2[1] - radius) smins[1] = v2[1] - radius;
 684         if (smaxs[1] < v2[1] - radius) smaxs[1] = v2[1] + radius;
 685         if (smins[2] < v2[2] - radius) smins[2] = v2[2] - radius;
 686         if (smaxs[2] < v2[2] - radius) smaxs[2] = v2[2] + radius;
 687         // clip it to the view plane
 688         if (smins[2] < 1)
 689                 smins[2] = 1;
 690         // return true if that culled the box
 691         if (smins[2] >= smaxs[2])
 692                 return true;
 693         // ok some of it is infront of the view, transform each corner back to
 694         // worldspace and then to screenspace and make screen rect
 695         for (i = 0;i < 8;i++)
 696         {
 697                 v2[0] = (i & 1) ? smins[0] : smaxs[0];
 698                 v2[1] = (i & 2) ? smins[1] : smaxs[1];
 699                 v2[2] = (i & 4) ? smins[2] : smaxs[2];
 700                 v[0] = v2[0] * vright[0] + v2[1] * vup[0] + v2[2] * vpn[0] + r_origin[0];
 701                 v[1] = v2[0] * vright[1] + v2[1] * vup[1] + v2[2] * vpn[1] + r_origin[1];
 702                 v[2] = v2[0] * vright[2] + v2[1] * vup[2] + v2[2] * vpn[2] + r_origin[2];
 703                 v[3] = 1.0f;
 704                 GL_TransformToScreen(v, v2);
 705                 //Con_Printf("%.3f %.3f %.3f %.3f transformed to %.3f %.3f %.3f %.3f\n", v[0], v[1], v[2], v[3], v2[0], v2[1], v2[2], v2[3]);
 706                 x = v2[0];
 707                 y = v2[1];
 708                 if (i)
 709                 {
 710                         if (x1 > x) x1 = x;
 711                         if (x2 < x) x2 = x;
 712                         if (y1 > y) y1 = y;
 713                         if (y2 < y) y2 = y;
 714                 }
 715                 else
 716                 {
 717                         x1 = x2 = x;
 718                         y1 = y2 = y;
 719                 }
 720         }
 721         /*
 722         // this code doesn't handle boxes with any points behind view properly
 723         x1 = 1000;x2 = -1000;
 724         y1 = 1000;y2 = -1000;
 725         for (i = 0;i < 8;i++)
 726         {
 727                 v[0] = (i & 1) ? mins[0] : maxs[0];
 728                 v[1] = (i & 2) ? mins[1] : maxs[1];
 729                 v[2] = (i & 4) ? mins[2] : maxs[2];
 730                 v[3] = 1.0f;
 731                 GL_TransformToScreen(v, v2);
 732                 //Con_Printf("%.3f %.3f %.3f %.3f transformed to %.3f %.3f %.3f %.3f\n", v[0], v[1], v[2], v[3], v2[0], v2[1], v2[2], v2[3]);
 733                 if (v2[2] > 0)
 734                 {
 735                         x = v2[0];
 736                         y = v2[1];
 737
 738                         if (x1 > x) x1 = x;
 739                         if (x2 < x) x2 = x;
 740                         if (y1 > y) y1 = y;
 741                         if (y2 < y) y2 = y;
 742                 }
 743         }
 744         */
 745         ix1 = x1 - 1.0f;
 746         iy1 = y1 - 1.0f;
 747         ix2 = x2 + 1.0f;
 748         iy2 = y2 + 1.0f;
 749         //Con_Printf("%f %f %f %f\n", x1, y1, x2, y2);
 750         if (ix1 < r_refdef.x) ix1 = r_refdef.x;
 751         if (iy1 < r_refdef.y) iy1 = r_refdef.y;
 752         if (ix2 > r_refdef.x + r_refdef.width) ix2 = r_refdef.x + r_refdef.width;
 753         if (iy2 > r_refdef.y + r_refdef.height) iy2 = r_refdef.y + r_refdef.height;
 754         if (ix2 <= ix1 || iy2 <= iy1)
 755                 return true;
 756         // set up the scissor rectangle
 757         qglScissor(ix1, iy1, ix2 - ix1, iy2 - iy1);
 758         qglEnable(GL_SCISSOR_TEST);
 759         return false;
 760 }
 761
 762 void R_Shadow_GenTexCoords_Attenuation2D1D(float *out2d, float *out1d, int numverts, const float *vertex, const float *svectors, const float *tvectors, const float *normals, const vec3_t relativelightorigin, float lightradius)
 763 {
 764         int i;
 765         float lightvec[3], iradius;
 766         iradius = 0.5f / lightradius;
 767         for (i = 0;i < numverts;i++, vertex += 4, svectors += 4, tvectors += 4, normals += 4, out2d += 4, out1d += 4)
 768         {
 769                 VectorSubtract(vertex, relativelightorigin, lightvec);
 770                 out2d[0] = 0.5f + DotProduct(svectors, lightvec) * iradius;
 771                 out2d[1] = 0.5f + DotProduct(tvectors, lightvec) * iradius;
 772                 out2d[2] = 0;
 773                 out1d[0] = 0.5f + DotProduct(normals, lightvec) * iradius;
 774                 out1d[1] = 0.5f;
 775                 out1d[2] = 0;
 776         }
 777 }
 778
 779 void R_Shadow_GenTexCoords_Diffuse_Attenuation3D(float *out, int numverts, const float *vertex, const float *svectors, const float *tvectors, const float *normals, const vec3_t relativelightorigin, float lightradius)
 780 {
 781         int i;
 782         float lightvec[3], iradius;
 783         iradius = 0.5f / lightradius;
 784         for (i = 0;i < numverts;i++, vertex += 4, svectors += 4, tvectors += 4, normals += 4, out += 4)
 785         {
 786                 VectorSubtract(vertex, relativelightorigin, lightvec);
 787                 out[0] = 0.5f + DotProduct(svectors, lightvec) * iradius;
 788                 out[1] = 0.5f + DotProduct(tvectors, lightvec) * iradius;
 789                 out[2] = 0.5f + DotProduct(normals, lightvec) * iradius;
 790         }
 791 }
 792
 793 void R_Shadow_GenTexCoords_Diffuse_NormalCubeMap(float *out, int numverts, const float *vertex, const float *svectors, const float *tvectors, const float *normals, const vec3_t relativelightorigin)
 794 {
 795         int i;
 796         float lightdir[3];
 797         for (i = 0;i < numverts;i++, vertex += 4, svectors += 4, tvectors += 4, normals += 4, out += 4)
 798         {
 799                 VectorSubtract(vertex, relativelightorigin, lightdir);
 800                 // the cubemap normalizes this for us
 801                 out[0] = DotProduct(svectors, lightdir);
 802                 out[1] = DotProduct(tvectors, lightdir);
 803                 out[2] = DotProduct(normals, lightdir);
 804         }
 805 }
 806
 807 void R_Shadow_GenTexCoords_Specular_Attenuation3D(float *out, int numverts, const float *vertex, const float *svectors, const float *tvectors, const float *normals, const vec3_t relativelightorigin, const vec3_t relativeeyeorigin, float lightradius)
 808 {
 809         int i;
 810         float lightdir[3], eyedir[3], halfdir[3], lightdirlen, iradius;
 811         iradius = 0.5f / lightradius;
 812         for (i = 0;i < numverts;i++, vertex += 4, svectors += 4, tvectors += 4, normals += 4, out += 4)
 813         {
 814                 VectorSubtract(vertex, relativelightorigin, lightdir);
 815                 // this is used later to make the attenuation correct
 816                 lightdirlen = sqrt(DotProduct(lightdir, lightdir)) * iradius;
 817                 VectorNormalizeFast(lightdir);
 818                 VectorSubtract(vertex, relativeeyeorigin, eyedir);
 819                 VectorNormalizeFast(eyedir);
 820                 VectorAdd(lightdir, eyedir, halfdir);
 821                 VectorNormalizeFast(halfdir);
 822                 out[0] = 0.5f + DotProduct(svectors, halfdir) * lightdirlen;
 823                 out[1] = 0.5f + DotProduct(tvectors, halfdir) * lightdirlen;
 824                 out[2] = 0.5f + DotProduct(normals, halfdir) * lightdirlen;
 825         }
 826 }
 827
 828 void R_Shadow_GenTexCoords_Specular_NormalCubeMap(float *out, int numverts, const float *vertex, const float *svectors, const float *tvectors, const float *normals, const vec3_t relativelightorigin, const vec3_t relativeeyeorigin)
 829 {
 830         int i;
 831         float lightdir[3], eyedir[3], halfdir[3];
 832         for (i = 0;i < numverts;i++, vertex += 4, svectors += 4, tvectors += 4, normals += 4, out += 4)
 833         {
 834                 VectorSubtract(vertex, relativelightorigin, lightdir);
 835                 VectorNormalizeFast(lightdir);
 836                 VectorSubtract(vertex, relativeeyeorigin, eyedir);
 837                 VectorNormalizeFast(eyedir);
 838                 VectorAdd(lightdir, eyedir, halfdir);
 839                 // the cubemap normalizes this for us
 840                 out[0] = DotProduct(svectors, halfdir);
 841                 out[1] = DotProduct(tvectors, halfdir);
 842                 out[2] = DotProduct(normals, halfdir);
 843         }
 844 }
 845
 846 void R_Shadow_GenTexCoords_LightCubeMap(float *out, int numverts, const float *vertex, const vec3_t relativelightorigin)
 847 {
 848         int i;
 849         // FIXME: this needs to be written
 850         // this code assumes the vertices are in worldspace (a false assumption)
 851         for (i = 0;i < numverts;i++, vertex += 4, out += 4)
 852                 VectorSubtract(vertex, relativelightorigin, out);
 853 }
 854
 855 void R_Shadow_DiffuseLighting(int numverts, int numtriangles, const int *elements, const float *svectors, const float *tvectors, const float *normals, const float *texcoords, const float *relativelightorigin, float lightradius, const float *lightcolor, rtexture_t *basetexture, rtexture_t *bumptexture, rtexture_t *lightcubemap)
 856 {
 857         int renders, mult;
 858         float scale, colorscale;
 859         rmeshstate_t m;
 860         memset(&m, 0, sizeof(m));
 861         if (!bumptexture)
 862                 bumptexture = r_shadow_blankbumptexture;
 863         // colorscale accounts for how much we multiply the brightness during combine
 864         // mult is how many times the final pass of the lighting will be
 865         // performed to get more brightness than otherwise possible
 866         // limit mult to 64 for sanity sake
 867         if (r_shadow_texture3d.integer)
 868         {
 869                 if (r_textureunits.integer >= 4 && !lightcubemap)
 870                 {
 871                         // 4 texture 3D combine path, one pass, no light cubemap support
 872                         m.tex[0] = R_GetTexture(bumptexture);
 873                         m.tex3d[1] = R_GetTexture(r_shadow_normalsattenuationtexture);
 874                         m.tex[2] = R_GetTexture(basetexture);
 875                         m.tex[3] = R_GetTexture(r_shadow_blankwhitetexture);
 876                         m.texcombinergb[0] = GL_REPLACE;
 877                         m.texcombinergb[1] = GL_DOT3_RGB_ARB;
 878                         m.texcombinergb[2] = GL_MODULATE;
 879                         m.texcombinergb[3] = GL_MODULATE;
 880                         m.texrgbscale[1] = 1;
 881                         m.texrgbscale[3] = 4;
 882                         R_Mesh_TextureState(&m);
 883                         memcpy(varray_texcoord[0], texcoords, numverts * sizeof(float[4]));
 884                         memcpy(varray_texcoord[2], texcoords, numverts * sizeof(float[4]));
 885                         R_Shadow_GenTexCoords_Diffuse_Attenuation3D(varray_texcoord[1], numverts, varray_vertex, svectors, tvectors, normals, relativelightorigin, lightradius);
 886                         qglActiveTexture(GL_TEXTURE3_ARB);
 887                         qglTexEnvi(GL_TEXTURE_ENV, GL_SOURCE0_RGB_ARB, GL_PRIMARY_COLOR_ARB);
 888                         colorscale = r_colorscale * 0.25f * r_shadow_lightintensityscale.value;
 889                         for (mult = 1, scale = ixtable[mult];mult < 64 && (lightcolor[0] * scale * colorscale > 1 || lightcolor[1] * scale * colorscale > 1 || lightcolor[2] * scale * colorscale > 1);mult++, scale = ixtable[mult]);
 890                         colorscale *= scale;
 891                         GL_Color(lightcolor[0] * colorscale, lightcolor[1] * colorscale, lightcolor[2] * colorscale, 1);
 892                         for (renders = 0;renders < mult;renders++)
 893                                 R_Mesh_Draw(numverts, numtriangles, elements);
 894                         qglActiveTexture(GL_TEXTURE3_ARB);
 895                         qglTexEnvi(GL_TEXTURE_ENV, GL_SOURCE0_RGB_ARB, GL_TEXTURE);
 896                 }
 897                 else
 898                 {
 899                         // 2 texture no3D combine path, two pass
 900                         m.tex[0] = R_GetTexture(bumptexture);
 901                         m.tex3d[1] = R_GetTexture(r_shadow_normalsattenuationtexture);
 902                         m.texcombinergb[0] = GL_REPLACE;
 903                         m.texcombinergb[1] = GL_DOT3_RGBA_ARB;
 904                         m.texalphascale[1] = 1;
 905                         R_Mesh_TextureState(&m);
 906                         qglColorMask(0,0,0,1);
 907                         qglDisable(GL_BLEND);
 908                         GL_Color(1,1,1,1);
 909                         memcpy(varray_texcoord[0], texcoords, numverts * sizeof(float[4]));
 910                         R_Shadow_GenTexCoords_Diffuse_Attenuation3D(varray_texcoord[1], numverts, varray_vertex, svectors, tvectors, normals, relativelightorigin, lightradius);
 911                         R_Mesh_Draw(numverts, numtriangles, elements);
 912
 913                         m.tex[0] = R_GetTexture(basetexture);
 914                         m.tex3d[1] = 0;
 915                         m.texcubemap[1] = R_GetTexture(lightcubemap);
 916                         m.texcombinergb[0] = GL_MODULATE;
 917                         m.texcombinergb[1] = GL_MODULATE;
 918                         m.texrgbscale[1] = 1;
 919                         m.texalphascale[1] = 1;
 920                         R_Mesh_TextureState(&m);
 921                         qglColorMask(1,1,1,1);
 922                         qglBlendFunc(GL_DST_ALPHA, GL_ONE);
 923                         qglEnable(GL_BLEND);
 924                         if (lightcubemap)
 925                                 R_Shadow_GenTexCoords_LightCubeMap(varray_texcoord[1], numverts, varray_vertex, relativelightorigin);
 926
 927                         colorscale = r_colorscale * 1.0f * r_shadow_lightintensityscale.value;
 928                         for (mult = 1, scale = ixtable[mult];mult < 64 && (lightcolor[0] * scale * colorscale > 1 || lightcolor[1] * scale * colorscale > 1 || lightcolor[2] * scale * colorscale > 1);mult++, scale = ixtable[mult]);
 929                         colorscale *= scale;
 930                         GL_Color(lightcolor[0] * colorscale, lightcolor[1] * colorscale, lightcolor[2] * colorscale, 1);
 931                         for (renders = 0;renders < mult;renders++)
 932                                 R_Mesh_Draw(numverts, numtriangles, elements);
 933                 }
 934         }
 935         else if (r_textureunits.integer >= 4)
 936         {
 937                 // 4 texture no3D combine path, two pass
 938                 m.tex[0] = R_GetTexture(bumptexture);
 939                 m.texcubemap[1] = R_GetTexture(r_shadow_normalscubetexture);
 940                 m.texcombinergb[0] = GL_REPLACE;
 941                 m.texcombinergb[1] = GL_DOT3_RGBA_ARB;
 942                 m.tex[2] = R_GetTexture(r_shadow_attenuation2dtexture);
 943                 m.tex[3] = R_GetTexture(r_shadow_attenuation2dtexture);
 944                 R_Mesh_TextureState(&m);
 945                 qglColorMask(0,0,0,1);
 946                 qglDisable(GL_BLEND);
 947                 GL_Color(1,1,1,1);
 948                 memcpy(varray_texcoord[0], texcoords, numverts * sizeof(float[4]));
 949                 R_Shadow_GenTexCoords_Diffuse_NormalCubeMap(varray_texcoord[1], numverts, varray_vertex, svectors, tvectors, normals, relativelightorigin);
 950                 R_Shadow_GenTexCoords_Attenuation2D1D(varray_texcoord[2], varray_texcoord[3], numverts, varray_vertex, svectors, tvectors, normals, relativelightorigin, lightradius);
 951                 R_Mesh_Draw(numverts, numtriangles, elements);
 952
 953                 m.tex[0] = R_GetTexture(basetexture);
 954                 m.texcubemap[1] = R_GetTexture(lightcubemap);
 955                 m.texcombinergb[0] = GL_MODULATE;
 956                 m.texcombinergb[1] = GL_MODULATE;
 957                 m.tex[2] = 0;
 958                 m.tex[3] = 0;
 959                 R_Mesh_TextureState(&m);
 960                 qglColorMask(1,1,1,1);
 961                 qglBlendFunc(GL_DST_ALPHA, GL_ONE);
 962                 qglEnable(GL_BLEND);
 963                 if (lightcubemap)
 964                         R_Shadow_GenTexCoords_LightCubeMap(varray_texcoord[1], numverts, varray_vertex, relativelightorigin);
 965
 966                 colorscale = r_colorscale * 1.0f * r_shadow_lightintensityscale.value;
 967                 for (mult = 1, scale = ixtable[mult];mult < 64 && (lightcolor[0] * scale * colorscale > 1 || lightcolor[1] * scale * colorscale > 1 || lightcolor[2] * scale * colorscale > 1);mult++, scale = ixtable[mult]);
 968                 colorscale *= scale;
 969                 GL_Color(lightcolor[0] * colorscale, lightcolor[1] * colorscale, lightcolor[2] * colorscale, 1);
 970                 for (renders = 0;renders < mult;renders++)
 971                         R_Mesh_Draw(numverts, numtriangles, elements);
 972         }
 973         else
 974         {
 975                 // 2 texture no3D combine path, three pass
 976                 m.tex[0] = R_GetTexture(r_shadow_attenuation2dtexture);
 977                 m.tex[1] = R_GetTexture(r_shadow_attenuation2dtexture);
 978                 R_Mesh_TextureState(&m);
 979                 qglColorMask(0,0,0,1);
 980                 qglDisable(GL_BLEND);
 981                 GL_Color(1,1,1,1);
 982                 R_Shadow_GenTexCoords_Attenuation2D1D(varray_texcoord[0], varray_texcoord[1], numverts, varray_vertex, svectors, tvectors, normals, relativelightorigin, lightradius);
 983                 R_Mesh_Draw(numverts, numtriangles, elements);
 984
 985                 m.tex[0] = R_GetTexture(bumptexture);
 986                 m.tex[1] = 0;
 987                 m.texcubemap[1] = R_GetTexture(r_shadow_normalscubetexture);
 988                 m.texcombinergb[1] = GL_DOT3_RGBA_ARB;
 989                 R_Mesh_TextureState(&m);
 990                 qglBlendFunc(GL_DST_ALPHA, GL_ZERO);
 991                 qglEnable(GL_BLEND);
 992                 memcpy(varray_texcoord[0], texcoords, numverts * sizeof(float[4]));
 993                 R_Shadow_GenTexCoords_Diffuse_NormalCubeMap(varray_texcoord[1], numverts, varray_vertex, svectors, tvectors, normals, relativelightorigin);
 994                 R_Mesh_Draw(numverts, numtriangles, elements);
 995
 996                 m.tex[0] = R_GetTexture(basetexture);
 997                 m.texcubemap[1] = R_GetTexture(lightcubemap);
 998                 m.texcombinergb[1] = GL_MODULATE;
 999                 R_Mesh_TextureState(&m);
1000                 qglColorMask(1,1,1,1);
1001                 qglBlendFunc(GL_DST_ALPHA, GL_ONE);
1002                 if (lightcubemap)
1003                         R_Shadow_GenTexCoords_LightCubeMap(varray_texcoord[1], numverts, varray_vertex, relativelightorigin);
1004
1005                 colorscale = r_colorscale * 1.0f * r_shadow_lightintensityscale.value;
1006                 for (mult = 1, scale = ixtable[mult];mult < 64 && (lightcolor[0] * scale * colorscale > 1 || lightcolor[1] * scale * colorscale > 1 || lightcolor[2] * scale * colorscale > 1);mult++, scale = ixtable[mult]);
1007                 colorscale *= scale;
1008                 GL_Color(lightcolor[0] * colorscale, lightcolor[1] * colorscale, lightcolor[2] * colorscale, 1);
1009                 for (renders = 0;renders < mult;renders++)
1010                         R_Mesh_Draw(numverts, numtriangles, elements);
1011         }
1012 }
1013
1014 void R_Shadow_SpecularLighting(int numverts, int numtriangles, const int *elements, const float *svectors, const float *tvectors, const float *normals, const float *texcoords, const float *relativelightorigin, const float *relativeeyeorigin, float lightradius, const float *lightcolor, rtexture_t *glosstexture, rtexture_t *bumptexture, rtexture_t *lightcubemap)
1015 {
1016         int renders, mult;
1017         float scale, colorscale;
1018         rmeshstate_t m;
1019         memset(&m, 0, sizeof(m));
1020         if (!bumptexture)
1021                 bumptexture = r_shadow_blankbumptexture;
1022         if (!glosstexture)
1023                 glosstexture = r_shadow_blankglosstexture;
1024         if (r_shadow_gloss.integer >= 2 || (r_shadow_gloss.integer >= 1 && glosstexture != r_shadow_blankglosstexture))
1025         {
1026                 // 2 texture no3D combine path, five pass
1027                 memset(&m, 0, sizeof(m));
1028
1029                 m.tex[0] = R_GetTexture(bumptexture);
1030                 m.texcubemap[1] = R_GetTexture(r_shadow_normalscubetexture);
1031                 m.texcombinergb[1] = GL_DOT3_RGBA_ARB;
1032                 R_Mesh_TextureState(&m);
1033                 qglColorMask(0,0,0,1);
1034                 qglDisable(GL_BLEND);
1035                 GL_Color(1,1,1,1);
1036                 memcpy(varray_texcoord[0], texcoords, numverts * sizeof(float[4]));
1037                 R_Shadow_GenTexCoords_Specular_NormalCubeMap(varray_texcoord[1], numverts, varray_vertex, svectors, tvectors, normals, relativelightorigin, relativeeyeorigin);
1038                 R_Mesh_Draw(numverts, numtriangles, elements);
1039
1040                 m.tex[0] = 0;
1041                 m.texcubemap[1] = 0;
1042                 m.texcombinergb[1] = GL_MODULATE;
1043                 R_Mesh_TextureState(&m);
1044                 // square alpha in framebuffer a few times to make it shiny
1045                 qglBlendFunc(GL_ZERO, GL_DST_ALPHA);
1046                 qglEnable(GL_BLEND);
1047                 // these comments are a test run through this math for intensity 0.5
1048                 // 0.5 * 0.5 = 0.25
1049                 R_Mesh_Draw(numverts, numtriangles, elements);
1050                 // 0.25 * 0.25 = 0.0625
1051                 R_Mesh_Draw(numverts, numtriangles, elements);
1052                 // 0.0625 * 0.0625 = 0.00390625
1053                 R_Mesh_Draw(numverts, numtriangles, elements);
1054
1055                 m.tex[0] = R_GetTexture(r_shadow_attenuation2dtexture);
1056                 m.tex[1] = R_GetTexture(r_shadow_attenuation2dtexture);
1057                 R_Mesh_TextureState(&m);
1058                 qglBlendFunc(GL_DST_ALPHA, GL_ZERO);
1059                 R_Shadow_GenTexCoords_Attenuation2D1D(varray_texcoord[0], varray_texcoord[1], numverts, varray_vertex, svectors, tvectors, normals, relativelightorigin, lightradius);
1060                 R_Mesh_Draw(numverts, numtriangles, elements);
1061
1062                 m.tex[0] = R_GetTexture(glosstexture);
1063                 m.texcubemap[1] = R_GetTexture(lightcubemap);
1064                 R_Mesh_TextureState(&m);
1065                 qglColorMask(1,1,1,1);
1066                 qglBlendFunc(GL_DST_ALPHA, GL_ONE);
1067                 memcpy(varray_texcoord[0], texcoords, numverts * sizeof(float[4]));
1068                 if (lightcubemap)
1069                         R_Shadow_GenTexCoords_LightCubeMap(varray_texcoord[1], numverts, varray_vertex, relativelightorigin);
1070
1071                 // the 0.25f makes specular lighting much dimmer than diffuse (intentionally)
1072                 colorscale = r_colorscale * 0.25f * r_shadow_lightintensityscale.value;
1073                 for (mult = 1, scale = ixtable[mult];mult < 64 && (lightcolor[0] * scale * colorscale > 1 || lightcolor[1] * scale * colorscale > 1 || lightcolor[2] * scale * colorscale > 1);mult++, scale = ixtable[mult]);
1074                 colorscale *= scale;
1075                 GL_Color(lightcolor[0] * colorscale, lightcolor[1] * colorscale, lightcolor[2] * colorscale, 1);
1076                 for (renders = 0;renders < mult;renders++)
1077                         R_Mesh_Draw(numverts, numtriangles, elements);
1078         }
1079 }
1080
1081 #define PRECOMPUTEDSHADOWVOLUMES 1
1082 void R_Shadow_DrawWorldLightShadowVolume(matrix4x4_t *matrix, worldlight_t *light)
1083 {
1084 #if PRECOMPUTEDSHADOWVOLUMES
1085         R_Mesh_Matrix(matrix);
1086         R_Shadow_RenderShadowMeshVolume(light->shadowvolume);
1087 #else
1088         shadowmesh_t *mesh;
1089         R_Mesh_Matrix(matrix);
1090         for (mesh = light->shadowvolume;mesh;mesh = mesh->next)
1091         {
1092                 R_Mesh_ResizeCheck(mesh->numverts * 2);
1093                 memcpy(varray_vertex, mesh->verts, mesh->numverts * sizeof(float[4]));
1094                 R_Shadow_Volume(mesh->numverts, mesh->numtriangles, varray_vertex, mesh->elements, mesh->neighbors, light->origin, light->lightradius, light->lightradius);
1095         }
1096 #endif
1097 }
1098
1099 cvar_t r_editlights = {0, "r_editlights", "0"};
1100 cvar_t r_editlights_cursordistance = {0, "r_editlights_distance", "1024"};
1101 cvar_t r_editlights_cursorpushback = {0, "r_editlights_pushback", "0"};
1102 cvar_t r_editlights_cursorpushoff = {0, "r_editlights_pushoff", "4"};
1103 cvar_t r_editlights_cursorgrid = {0, "r_editlights_grid", "4"};
1104 worldlight_t *r_shadow_worldlightchain;
1105 worldlight_t *r_shadow_selectedlight;
1106 vec3_t r_editlights_cursorlocation;
1107
1108 static int castshadowcount = 1;
1109 void R_Shadow_NewWorldLight(vec3_t origin, float radius, vec3_t color, int style, const char *cubemapname)
1110 {
1111         int i, j, k, l, maxverts, *mark;
1112         float *verts, *v, *v0, *v1, f, projectdistance, temp[3], temp2[3], temp3[3], radius2;
1113         worldlight_t *e;
1114         shadowmesh_t *mesh;
1115         mleaf_t *leaf;
1116         msurface_t *surf;
1117         qbyte *pvs;
1118
1119         e = Mem_Alloc(r_shadow_mempool, sizeof(worldlight_t));
1120         VectorCopy(origin, e->origin);
1121         VectorCopy(color, e->light);
1122         e->lightradius = radius;
1123         VectorCopy(origin, e->mins);
1124         VectorCopy(origin, e->maxs);
1125         e->cullradius = 0;
1126         e->style = style;
1127         e->next = r_shadow_worldlightchain;
1128         r_shadow_worldlightchain = e;
1129         if (cubemapname)
1130         {
1131                 e->cubemapname = Mem_Alloc(r_shadow_mempool, strlen(cubemapname) + 1);
1132                 strcpy(e->cubemapname, cubemapname);
1133                 // FIXME: add cubemap loading (and don't load a cubemap twice)
1134         }
1135         if (cl.worldmodel)
1136         {
1137                 castshadowcount++;
1138                 leaf = Mod_PointInLeaf(origin, cl.worldmodel);
1139                 pvs = Mod_LeafPVS(leaf, cl.worldmodel);
1140                 for (i = 0, leaf = cl.worldmodel->leafs + 1;i < cl.worldmodel->numleafs;i++, leaf++)
1141                 {
1142                         if (pvs[i >> 3] & (1 << (i & 7)))
1143                         {
1144                                 VectorCopy(origin, temp);
1145                                 if (temp[0] < leaf->mins[0]) temp[0] = leaf->mins[0];
1146                                 if (temp[0] > leaf->maxs[0]) temp[0] = leaf->maxs[0];
1147                                 if (temp[1] < leaf->mins[1]) temp[1] = leaf->mins[1];
1148                                 if (temp[1] > leaf->maxs[1]) temp[1] = leaf->maxs[1];
1149                                 if (temp[2] < leaf->mins[2]) temp[2] = leaf->mins[2];
1150                                 if (temp[2] > leaf->maxs[2]) temp[2] = leaf->maxs[2];
1151                                 VectorSubtract(temp, origin, temp);
1152                                 if (DotProduct(temp, temp) < e->lightradius * e->lightradius)
1153                                 {
1154                                         leaf->worldnodeframe = castshadowcount;
1155                                         for (j = 0, mark = leaf->firstmarksurface;j < leaf->nummarksurfaces;j++, mark++)
1156                                         {
1157                                                 surf = cl.worldmodel->surfaces + *mark;
1158                                                 if (surf->castshadow != castshadowcount)
1159                                                 {
1160                                                         f = DotProduct(e->origin, surf->plane->normal) - surf->plane->dist;
1161                                                         if (surf->flags & SURF_PLANEBACK)
1162                                                                 f = -f;
1163                                                         if (f > 0 && f < e->lightradius)
1164                                                         {
1165                                                                 VectorSubtract(e->origin, surf->poly_center, temp);
1166                                                                 if (DotProduct(temp, temp) - surf->poly_radius2 < e->lightradius * e->lightradius)
1167                                                                         surf->castshadow = castshadowcount;
1168                                                         }
1169                                                 }
1170                                         }
1171                                 }
1172                         }
1173                 }
1174
1175                 e->numleafs = 0;
1176                 for (i = 0, leaf = cl.worldmodel->leafs + 1;i < cl.worldmodel->numleafs;i++, leaf++)
1177                         if (leaf->worldnodeframe == castshadowcount)
1178                                 e->numleafs++;
1179                 e->numsurfaces = 0;
1180                 for (i = 0, surf = cl.worldmodel->surfaces + cl.worldmodel->firstmodelsurface;i < cl.worldmodel->nummodelsurfaces;i++, surf++)
1181                         if (surf->castshadow == castshadowcount)
1182                                 e->numsurfaces++;
1183
1184                 if (e->numleafs)
1185                         e->leafs = Mem_Alloc(r_shadow_mempool, e->numleafs * sizeof(mleaf_t *));
1186                 if (e->numsurfaces)
1187                         e->surfaces = Mem_Alloc(r_shadow_mempool, e->numsurfaces * sizeof(msurface_t *));
1188                 e->numleafs = 0;
1189                 for (i = 0, leaf = cl.worldmodel->leafs + 1;i < cl.worldmodel->numleafs;i++, leaf++)
1190                         if (leaf->worldnodeframe == castshadowcount)
1191                                 e->leafs[e->numleafs++] = leaf;
1192                 e->numsurfaces = 0;
1193                 for (i = 0, surf = cl.worldmodel->surfaces + cl.worldmodel->firstmodelsurface;i < cl.worldmodel->nummodelsurfaces;i++, surf++)
1194                         if (surf->castshadow == castshadowcount)
1195                                 e->surfaces[e->numsurfaces++] = surf;
1196                 // find bounding box and sphere of lit surfaces
1197                 // (these will be used for creating a shape to clip the light)
1198                 radius2 = 0;
1199                 VectorCopy(e->origin, e->mins);
1200                 VectorCopy(e->origin, e->maxs);
1201                 for (j = 0;j < e->numsurfaces;j++)
1202                 {
1203                         surf = e->surfaces[j];
1204                         for (k = 0, v = surf->poly_verts;k < surf->poly_numverts;k++, v += 3)
1205                         {
1206                                 if (e->mins[0] > v[0]) e->mins[0] = v[0];if (e->maxs[0] < v[0]) e->maxs[0] = v[0];
1207                                 if (e->mins[1] > v[1]) e->mins[1] = v[1];if (e->maxs[1] < v[1]) e->maxs[1] = v[1];
1208                                 if (e->mins[2] > v[2]) e->mins[2] = v[2];if (e->maxs[2] < v[2]) e->maxs[2] = v[2];
1209                                 VectorSubtract(v, e->origin, temp);
1210                                 f = DotProduct(temp, temp);
1211                                 if (radius2 < f)
1212                                         radius2 = f;
1213                         }
1214                 }
1215                 e->cullradius = sqrt(radius2);
1216                 if (e->cullradius > e->lightradius)
1217                         e->cullradius = e->lightradius;
1218                 if (e->mins[0] < e->origin[0] - e->lightradius) e->mins[0] = e->origin[0] - e->lightradius;
1219                 if (e->maxs[0] > e->origin[0] + e->lightradius) e->maxs[0] = e->origin[0] + e->lightradius;
1220                 if (e->mins[1] < e->origin[1] - e->lightradius) e->mins[1] = e->origin[1] - e->lightradius;
1221                 if (e->maxs[1] > e->origin[1] + e->lightradius) e->maxs[1] = e->origin[1] + e->lightradius;
1222                 if (e->mins[2] < e->origin[2] - e->lightradius) e->mins[2] = e->origin[2] - e->lightradius;
1223                 if (e->maxs[2] > e->origin[2] + e->lightradius) e->maxs[2] = e->origin[2] + e->lightradius;
1224                 Con_Printf("%f %f %f, %f %f %f, %f, %f, %d, %d\n", e->mins[0], e->mins[1], e->mins[2], e->maxs[0], e->maxs[1], e->maxs[2], e->cullradius, e->lightradius, e->numleafs, e->numsurfaces);
1225                 // clip shadow volumes against eachother to remove unnecessary
1226                 // polygons (and sections of polygons)
1227                 maxverts = 256;
1228                 verts = NULL;
1229                 castshadowcount++;
1230                 for (j = 0;j < e->numsurfaces;j++)
1231                 {
1232                         surf = e->surfaces[j];
1233                         if (surf->flags & SURF_SHADOWCAST)
1234                         {
1235                                 surf->castshadow = castshadowcount;
1236                                 if (maxverts < surf->poly_numverts)
1237                                         maxverts = surf->poly_numverts;
1238                         }
1239                 }
1240                 e->shadowvolume = Mod_ShadowMesh_Begin(r_shadow_mempool, 32768);
1241 #if !PRECOMPUTEDSHADOWVOLUMES
1242                 // make a mesh to cast a shadow volume from
1243                 for (j = 0;j < e->numsurfaces;j++)
1244                         if (e->surfaces[j]->castshadow == castshadowcount)
1245                                 Mod_ShadowMesh_AddPolygon(r_shadow_mempool, e->shadowvolume, e->surfaces[j]->poly_numverts, e->surfaces[j]->poly_verts);
1246 #else
1247 #if 1
1248                 {
1249                 int tris;
1250                 shadowmesh_t *castmesh, *mesh;
1251                 surfmesh_t *surfmesh;
1252                 // make a mesh to cast a shadow volume from
1253                 castmesh = Mod_ShadowMesh_Begin(r_shadow_mempool, 32768);
1254                 for (j = 0;j < e->numsurfaces;j++)
1255                         if (e->surfaces[j]->castshadow == castshadowcount)
1256                                 for (surfmesh = e->surfaces[j]->mesh;surfmesh;surfmesh = surfmesh->chain)
1257                                         Mod_ShadowMesh_AddMesh(r_shadow_mempool, castmesh, surfmesh->numverts, surfmesh->verts, surfmesh->numtriangles, surfmesh->index);
1258                 castmesh = Mod_ShadowMesh_Finish(r_shadow_mempool, castmesh);
1259
1260                 // cast shadow volume from castmesh
1261                 for (mesh = castmesh;mesh;mesh = mesh->next)
1262                 {
1263                         R_Shadow_ResizeTriangleFacingLight(castmesh->numtriangles);
1264                         R_Shadow_ResizeShadowElements(castmesh->numtriangles);
1265
1266                         if (maxverts < castmesh->numverts * 2)
1267                         {
1268                                 maxverts = castmesh->numverts * 2;
1269                                 if (verts)
1270                                         Mem_Free(verts);
1271                                 verts = NULL;
1272                         }
1273                         if (verts == NULL && maxverts > 0)
1274                                 verts = Mem_Alloc(r_shadow_mempool, maxverts * sizeof(float[4]));
1275
1276                         // now that we have the buffers big enough, construct shadow volume mesh
1277                         memcpy(verts, castmesh->verts, castmesh->numverts * sizeof(float[4]));
1278                         R_Shadow_ProjectVertices(verts, verts + castmesh->numverts * 4, castmesh->numverts, e->origin, e->lightradius);
1279                         R_Shadow_MakeTriangleShadowFlags(castmesh->elements, verts, castmesh->numtriangles, trianglefacinglight, e->origin, e->lightradius);
1280                         tris = R_Shadow_BuildShadowVolumeTriangles(castmesh->elements, castmesh->neighbors, castmesh->numtriangles, castmesh->numverts, trianglefacinglight, shadowelements);
1281                         // add the constructed shadow volume mesh
1282                         Mod_ShadowMesh_AddMesh(r_shadow_mempool, e->shadowvolume, castmesh->numverts, verts, tris, shadowelements);
1283                 }
1284                 // we're done with castmesh now
1285                 Mod_ShadowMesh_Free(castmesh);
1286                 }
1287 #else
1288                 // make a shadow volume mesh
1289                 if (verts == NULL && maxverts > 0)
1290                         verts = Mem_Alloc(r_shadow_mempool, maxverts * sizeof(float[4]));
1291                 for (j = 0;j < e->numsurfaces;j++)
1292                 {
1293                         surf = e->surfaces[j];
1294                         if (surf->castshadow != castshadowcount)
1295                                 continue;
1296                         projectdistance = 1000000.0f;//e->lightradius;
1297                         // copy the original polygon, for the front cap of the volume
1298                         for (k = 0, v0 = surf->poly_verts, v1 = verts;k < surf->poly_numverts;k++, v0 += 3, v1 += 3)
1299                                 VectorCopy(v0, v1);
1300                         Mod_ShadowMesh_AddPolygon(r_shadow_mempool, e->shadowvolume, surf->poly_numverts, verts);
1301                         // project the original polygon, reversed, for the back cap of the volume
1302                         for (k = 0, v0 = surf->poly_verts + (surf->poly_numverts - 1) * 3, v1 = verts;k < surf->poly_numverts;k++, v0 -= 3, v1 += 3)
1303                         {
1304                                 VectorSubtract(v0, e->origin, temp);
1305                                 //VectorNormalize(temp);
1306                                 VectorMA(v0, projectdistance, temp, v1);
1307                         }
1308                         Mod_ShadowMesh_AddPolygon(r_shadow_mempool, e->shadowvolume, surf->poly_numverts, verts);
1309                         // project the shadow volume sides
1310                         for (l = surf->poly_numverts - 1, k = 0, v0 = surf->poly_verts + (surf->poly_numverts - 1) * 3, v1 = surf->poly_verts;k < surf->poly_numverts;l = k, k++, v0 = v1, v1 += 3)
1311                         {
1312                                 if (surf->neighborsurfaces == NULL || surf->neighborsurfaces[l] == NULL || surf->neighborsurfaces[l]->castshadow != castshadowcount)
1313                                 {
1314                                         VectorCopy(v1, &verts[0]);
1315                                         VectorCopy(v0, &verts[3]);
1316                                         VectorCopy(v0, &verts[6]);
1317                                         VectorCopy(v1, &verts[9]);
1318                                         VectorSubtract(&verts[6], e->origin, temp);
1319                                         //VectorNormalize(temp);
1320                                         VectorMA(&verts[6], projectdistance, temp, &verts[6]);
1321                                         VectorSubtract(&verts[9], e->origin, temp);
1322                                         //VectorNormalize(temp);
1323                                         VectorMA(&verts[9], projectdistance, temp, &verts[9]);
1324
1325 #if 0
1326                                         VectorSubtract(&verts[0], &verts[3], temp);
1327                                         VectorSubtract(&verts[6], &verts[3], temp2);
1328                                         CrossProduct(temp, temp2, temp3);
1329                                         VectorNormalize(temp3);
1330                                         if (DotProduct(surf->poly_center, temp3) > DotProduct(&verts[0], temp3))
1331                                         {
1332                                                 VectorCopy(v0, &verts[0]);
1333                                                 VectorCopy(v1, &verts[3]);
1334                                                 VectorCopy(v1, &verts[6]);
1335                                                 VectorCopy(v0, &verts[9]);
1336                                                 VectorSubtract(&verts[6], e->origin, temp);
1337                                                 //VectorNormalize(temp);
1338                                                 VectorMA(&verts[6], projectdistance, temp, &verts[6]);
1339                                                 VectorSubtract(&verts[9], e->origin, temp);
1340                                                 //VectorNormalize(temp);
1341                                                 VectorMA(&verts[9], projectdistance, temp, &verts[9]);
1342                                                 Con_Printf("flipped shadow volume edge %8p %i\n", surf, l);
1343                                         }
1344 #endif
1345
1346                                         Mod_ShadowMesh_AddPolygon(r_shadow_mempool, e->shadowvolume, 4, verts);
1347                                 }
1348                         }
1349                 }
1350 #endif
1351 #endif
1352                 e->shadowvolume = Mod_ShadowMesh_Finish(r_shadow_mempool, e->shadowvolume);
1353                 for (l = 0, mesh = e->shadowvolume;mesh;mesh = mesh->next)
1354                         l += mesh->numtriangles;
1355                 Con_Printf("static shadow volume built containing %i triangles\n", l);
1356         }
1357 }
1358
1359 void R_Shadow_FreeWorldLight(worldlight_t *light)
1360 {
1361         worldlight_t **lightpointer;
1362         for (lightpointer = &r_shadow_worldlightchain;*lightpointer && *lightpointer != light;lightpointer = &(*lightpointer)->next);
1363         if (*lightpointer != light)
1364                 Sys_Error("R_Shadow_FreeWorldLight: light not linked into chain\n");
1365         *lightpointer = light->next;
1366         if (light->cubemapname)
1367                 Mem_Free(light->cubemapname);
1368         if (light->shadowvolume)
1369                 Mod_ShadowMesh_Free(light->shadowvolume);
1370         if (light->surfaces)
1371                 Mem_Free(light->surfaces);
1372         if (light->leafs)
1373                 Mem_Free(light->leafs);
1374         Mem_Free(light);
1375 }
1376
1377 void R_Shadow_ClearWorldLights(void)
1378 {
1379         while (r_shadow_worldlightchain)
1380                 R_Shadow_FreeWorldLight(r_shadow_worldlightchain);
1381         r_shadow_selectedlight = NULL;
1382 }
1383
1384 void R_Shadow_SelectLight(worldlight_t *light)
1385 {
1386         if (r_shadow_selectedlight)
1387                 r_shadow_selectedlight->selected = false;
1388         r_shadow_selectedlight = light;
1389         if (r_shadow_selectedlight)
1390                 r_shadow_selectedlight->selected = true;
1391 }
1392
1393 void R_Shadow_FreeSelectedWorldLight(void)
1394 {
1395         if (r_shadow_selectedlight)
1396         {
1397                 R_Shadow_FreeWorldLight(r_shadow_selectedlight);
1398                 r_shadow_selectedlight = NULL;
1399         }
1400 }
1401
1402 void R_Shadow_SelectLightInView(void)
1403 {
1404         float bestrating, rating, temp[3], dist;
1405         worldlight_t *best, *light;
1406         best = NULL;
1407         bestrating = 1e30;
1408         for (light = r_shadow_worldlightchain;light;light = light->next)
1409         {
1410                 VectorSubtract(light->origin, r_refdef.vieworg, temp);
1411                 dist = sqrt(DotProduct(temp, temp));
1412                 if (DotProduct(temp, vpn) >= 0.97 * dist && bestrating > dist && CL_TraceLine(light->origin, r_refdef.vieworg, NULL, NULL, 0, true, NULL) == 1.0f)
1413                 {
1414                         bestrating = dist;
1415                         best = light;
1416                 }
1417         }
1418         R_Shadow_SelectLight(best);
1419 }
1420
1421 void R_Shadow_LoadWorldLights(void)
1422 {
1423         int n, a, style;
1424         char name[MAX_QPATH], cubemapname[MAX_QPATH], *lightsstring, *s, *t;
1425         float origin[3], radius, color[3];
1426         COM_StripExtension(cl.worldmodel->name, name);
1427         strcat(name, ".rtlights");
1428         lightsstring = COM_LoadFile(name, false);
1429         if (lightsstring)
1430         {
1431                 s = lightsstring;
1432                 n = 0;
1433                 while (*s)
1434                 {
1435                         t = s;
1436                         while (*s && *s != '\n')
1437                                 s++;
1438                         if (!*s)
1439                                 break;
1440                         *s = 0;
1441                         a = sscanf(t, "%f %f %f %f %f %f %f %d %s", &origin[0], &origin[1], &origin[2], &radius, &color[0], &color[1], &color[2], &style, &cubemapname);
1442                         if (a < 9)
1443                                 cubemapname[0] = 0;
1444                         *s = '\n';
1445                         if (a < 8)
1446                         {
1447                                 Con_Printf("found %d parameters on line %i, should be 8 or 9 parameters (origin[0] origin[1] origin[2] radius color[0] color[1] color[2] style cubemapname)\n", a, n + 1);
1448                                 break;
1449                         }
1450                         R_Shadow_NewWorldLight(origin, radius, color, style, cubemapname);
1451                         s++;
1452                         n++;
1453                 }
1454                 if (*s)
1455                         Con_Printf("invalid rtlights file \"%s\"\n", name);
1456                 Mem_Free(lightsstring);
1457         }
1458 }
1459
1460 void R_Shadow_SaveWorldLights(void)
1461 {
1462         worldlight_t *light;
1463         int bufchars, bufmaxchars;
1464         char *buf, *oldbuf;
1465         char name[MAX_QPATH];
1466         char line[1024];
1467         if (!r_shadow_worldlightchain)
1468                 return;
1469         COM_StripExtension(cl.worldmodel->name, name);
1470         strcat(name, ".rtlights");
1471         bufchars = bufmaxchars = 0;
1472         buf = NULL;
1473         for (light = r_shadow_worldlightchain;light;light = light->next)
1474         {
1475                 sprintf(line, "%g %g %g %g %g %g %g %d %s\n", light->origin[0], light->origin[1], light->origin[2], light->lightradius, light->light[0], light->light[1], light->light[2], light->style, light->cubemapname ? light->cubemapname : "");
1476                 if (bufchars + strlen(line) > bufmaxchars)
1477                 {
1478                         bufmaxchars = bufchars + strlen(line) + 2048;
1479                         oldbuf = buf;
1480                         buf = Mem_Alloc(r_shadow_mempool, bufmaxchars);
1481                         if (oldbuf)
1482                         {
1483                                 if (bufchars)
1484                                         memcpy(buf, oldbuf, bufchars);
1485                                 Mem_Free(oldbuf);
1486                         }
1487                 }
1488                 if (strlen(line))
1489                 {
1490                         memcpy(buf + bufchars, line, strlen(line));
1491                         bufchars += strlen(line);
1492                 }
1493         }
1494         if (bufchars)
1495                 COM_WriteFile(name, buf, bufchars);
1496         if (buf)
1497                 Mem_Free(buf);
1498 }
1499
1500 void R_Shadow_LoadLightsFile(void)
1501 {
1502         int n, a, style;
1503         char name[MAX_QPATH], cubemapname[MAX_QPATH], *lightsstring, *s, *t;
1504         float origin[3], radius, color[3], subtract, spotdir[3], spotcone, falloff, distbias;
1505         COM_StripExtension(cl.worldmodel->name, name);
1506         strcat(name, ".lights");
1507         lightsstring = COM_LoadFile(name, false);
1508         if (lightsstring)
1509         {
1510                 s = lightsstring;
1511                 n = 0;
1512                 while (*s)
1513                 {
1514                         t = s;
1515                         while (*s && *s != '\n')
1516                                 s++;
1517                         if (!*s)
1518                                 break;
1519                         *s = 0;
1520                         a = sscanf(t, "%f %f %f %f %f %f %f %f %f %f %f %f %f %d", &origin[0], &origin[1], &origin[2], &falloff, &color[0], &color[1], &color[2], &subtract, &spotdir[0], &spotdir[1], &spotdir[2], &spotcone, &distbias, &style);
1521                         *s = '\n';
1522                         if (a < 14)
1523                         {
1524                                 Con_Printf("invalid lights file, found %d parameters on line %i, should be 14 parameters (origin[0] origin[1] origin[2] falloff light[0] light[1] light[2] subtract spotdir[0] spotdir[1] spotdir[2] spotcone distancebias style)\n", a, n + 1);
1525                                 break;
1526                         }
1527                         radius = sqrt(DotProduct(color, color) / (falloff * falloff * 16384.0f * 16384.0f));
1528                         radius = bound(15, radius, 4096);
1529                         VectorScale(color, (1.0f / 32768.0f), color);
1530                         R_Shadow_NewWorldLight(origin, radius, color, style, NULL);
1531                         s++;
1532                         n++;
1533                 }
1534                 if (*s)
1535                         Con_Printf("invalid lights file \"%s\"\n", name);
1536                 Mem_Free(lightsstring);
1537         }
1538 }
1539
1540 void R_Shadow_LoadWorldLightsFromMap_LightArghliteTyrlite(void)
1541 {
1542         int entnum, style, islight;
1543         char key[256], value[1024];
1544         float origin[3], radius, color[3], light, scale;
1545         const char *data;
1546
1547         data = cl.worldmodel->entities;
1548         if (!data)
1549                 return;
1550         for (entnum = 0;COM_ParseToken(&data) && com_token[0] == '{';entnum++)
1551         {
1552                 light = 0;
1553                 origin[0] = origin[1] = origin[2] = 0;
1554                 color[0] = color[1] = color[2] = 1;
1555                 scale = 1;
1556                 style = 0;
1557                 islight = false;
1558                 while (1)
1559                 {
1560                         if (!COM_ParseToken(&data))
1561                                 break; // error
1562                         if (com_token[0] == '}')
1563                                 break; // end of entity
1564                         if (com_token[0] == '_')
1565                                 strcpy(key, com_token + 1);
1566                         else
1567                                 strcpy(key, com_token);
1568                         while (key[strlen(key)-1] == ' ') // remove trailing spaces
1569                                 key[strlen(key)-1] = 0;
1570                         if (!COM_ParseToken(&data))
1571                                 break; // error
1572                         strcpy(value, com_token);
1573
1574                         // now that we have the key pair worked out...
1575                         if (!strcmp("light", key))
1576                                 light = atof(value);
1577                         else if (!strcmp("origin", key))
1578                                 sscanf(value, "%f %f %f", &origin[0], &origin[1], &origin[2]);
1579                         else if (!strcmp("color", key))
1580                                 sscanf(value, "%f %f %f", &color[0], &color[1], &color[2]);
1581                         else if (!strcmp("wait", key))
1582                                 scale = atof(value);
1583                         else if (!strcmp("classname", key))
1584                         {
1585                                 if (!strncmp(value, "light", 5))
1586                                         islight = true;
1587                         }
1588                         else if (!strcmp("style", key))
1589                                 style = atoi(value);
1590                 }
1591                 if (light <= 0 && islight)
1592                         light = 300;
1593                 radius = bound(0, light / scale, 1048576) + 15.0f;
1594                 light = bound(0, light, 1048576) * (1.0f / 256.0f);
1595                 VectorScale(color, light, color);
1596                 if (radius >= 15)
1597                         R_Shadow_NewWorldLight(origin, radius, color, style, NULL);
1598         }
1599 }
1600
1601
1602 void R_Shadow_SetCursorLocationForView(void)
1603 {
1604         vec_t dist, push, frac;
1605         vec3_t dest, endpos, normal;
1606         VectorMA(r_refdef.vieworg, r_editlights_cursordistance.value, vpn, dest);
1607         frac = CL_TraceLine(r_refdef.vieworg, dest, endpos, normal, 0, true, NULL);
1608         if (frac < 1)
1609         {
1610                 dist = frac * r_editlights_cursordistance.value;
1611                 push = r_editlights_cursorpushback.value;
1612                 if (push > dist)
1613                         push = dist;
1614                 push = -push;
1615                 VectorMA(endpos, push, vpn, endpos);
1616                 VectorMA(endpos, r_editlights_cursorpushoff.value, normal, endpos);
1617         }
1618         r_editlights_cursorlocation[0] = floor(endpos[0] / r_editlights_cursorgrid.value + 0.5f) * r_editlights_cursorgrid.value;
1619         r_editlights_cursorlocation[1] = floor(endpos[1] / r_editlights_cursorgrid.value + 0.5f) * r_editlights_cursorgrid.value;
1620         r_editlights_cursorlocation[2] = floor(endpos[2] / r_editlights_cursorgrid.value + 0.5f) * r_editlights_cursorgrid.value;
1621 }
1622
1623 extern void R_DrawCrosshairSprite(rtexture_t *texture, vec3_t origin, vec_t scale, float cr, float cg, float cb, float ca);
1624 void R_Shadow_DrawCursorCallback(const void *calldata1, int calldata2)
1625 {
1626         cachepic_t *pic;
1627         pic = Draw_CachePic("gfx/crosshair1.tga");
1628         if (pic)
1629                 R_DrawCrosshairSprite(pic->tex, r_editlights_cursorlocation, r_editlights_cursorgrid.value * 0.5f, 1, 1, 1, 1);
1630 }
1631
1632 void R_Shadow_DrawCursor(void)
1633 {
1634         R_MeshQueue_AddTransparent(r_editlights_cursorlocation, R_Shadow_DrawCursorCallback, NULL, 0);
1635 }
1636
1637 void R_Shadow_UpdateLightingMode(void)
1638 {
1639         r_shadow_lightingmode = 0;
1640         if (r_shadow_realtime.integer)
1641         {
1642                 if (r_shadow_worldlightchain)
1643                         r_shadow_lightingmode = 2;
1644                 else
1645                         r_shadow_lightingmode = 1;
1646         }
1647 }
1648
1649 void R_Shadow_UpdateWorldLightSelection(void)
1650 {
1651         if (r_editlights.integer)
1652         {
1653                 R_Shadow_SelectLightInView();
1654                 R_Shadow_SetCursorLocationForView();
1655                 R_Shadow_DrawCursor();
1656         }
1657         else
1658                 R_Shadow_SelectLight(NULL);
1659 }
1660
1661 void R_Shadow_EditLights_Clear_f(void)
1662 {
1663         R_Shadow_ClearWorldLights();
1664 }
1665
1666 void R_Shadow_EditLights_Reload_f(void)
1667 {
1668         if (cl.worldmodel)
1669         {
1670                 R_Shadow_ClearWorldLights();
1671                 R_Shadow_LoadWorldLights();
1672         }
1673 }
1674
1675 void R_Shadow_EditLights_Save_f(void)
1676 {
1677         if (cl.worldmodel)
1678                 R_Shadow_SaveWorldLights();
1679 }
1680
1681 void R_Shadow_EditLights_ImportLightEntitiesFromMap_f(void)
1682 {
1683         R_Shadow_ClearWorldLights();
1684         R_Shadow_LoadWorldLightsFromMap_LightArghliteTyrlite();
1685 }
1686
1687 void R_Shadow_EditLights_ImportLightsFile_f(void)
1688 {
1689         R_Shadow_ClearWorldLights();
1690         R_Shadow_LoadLightsFile();
1691 }
1692
1693 void R_Shadow_EditLights_Spawn_f(void)
1694 {
1695         vec3_t origin, color;
1696         vec_t radius;
1697         int style;
1698         const char *cubemapname;
1699         if (!r_editlights.integer)
1700         {
1701                 Con_Printf("Cannot spawn light when not in editing mode.  Set r_editlights to 1.\n");
1702                 return;
1703         }
1704         if (Cmd_Argc() <= 7)
1705         {
1706                 radius = 200;
1707                 color[0] = color[1] = color[2] = 1;
1708                 style = 0;
1709                 cubemapname = NULL;
1710                 if (Cmd_Argc() >= 2)
1711                 {
1712                         radius = atof(Cmd_Argv(1));
1713                         if (Cmd_Argc() >= 3)
1714                         {
1715                                 color[0] = atof(Cmd_Argv(2));
1716                                 color[1] = color[0];
1717                                 color[2] = color[0];
1718                                 if (Cmd_Argc() >= 5)
1719                                 {
1720                                         color[1] = atof(Cmd_Argv(3));
1721                                         color[2] = atof(Cmd_Argv(4));
1722                                         if (Cmd_Argc() >= 6)
1723                                         {
1724                                                 style = atoi(Cmd_Argv(5));
1725                                                 if (Cmd_Argc() >= 7)
1726                                                         cubemapname = Cmd_Argv(6);
1727                                         }
1728                                 }
1729                         }
1730                 }
1731                 if (cubemapname && !cubemapname[0])
1732                         cubemapname = NULL;
1733                 if (radius >= 16 && color[0] >= 0 && color[1] >= 0 && color[2] >= 0 && style >= 0 && style < 256 && (color[0] >= 0.1 || color[1] >= 0.1 || color[2] >= 0.1))
1734                 {
1735                         VectorCopy(r_editlights_cursorlocation, origin);
1736                         R_Shadow_NewWorldLight(origin, radius, color, style, cubemapname);
1737                         return;
1738                 }
1739         }
1740         Con_Printf("usage: r_editlights_spawn radius red green blue [style [cubemap]]\n");
1741 }
1742
1743 void R_Shadow_EditLights_Edit_f(void)
1744 {
1745         vec3_t origin, color;
1746         vec_t radius;
1747         int style;
1748         const char *cubemapname;
1749         if (!r_editlights.integer)
1750         {
1751                 Con_Printf("Cannot spawn light when not in editing mode.  Set r_editlights to 1.\n");
1752                 return;
1753         }
1754         if (!r_shadow_selectedlight)
1755         {
1756                 Con_Printf("No selected light.\n");
1757                 return;
1758         }
1759         if (Cmd_Argc() <= 7)
1760         {
1761                 radius = 200;
1762                 color[0] = color[1] = color[2] = 1;
1763                 style = 0;
1764                 cubemapname = NULL;
1765                 if (Cmd_Argc() >= 2)
1766                 {
1767                         radius = atof(Cmd_Argv(1));
1768                         if (Cmd_Argc() >= 3)
1769                         {
1770                                 color[0] = atof(Cmd_Argv(2));
1771                                 color[1] = color[0];
1772                                 color[2] = color[0];
1773                                 if (Cmd_Argc() >= 5)
1774                                 {
1775                                         color[1] = atof(Cmd_Argv(3));
1776                                         color[2] = atof(Cmd_Argv(4));
1777                                         if (Cmd_Argc() >= 6)
1778                                         {
1779                                                 style = atoi(Cmd_Argv(5));
1780                                                 if (Cmd_Argc() >= 7)
1781                                                         cubemapname = Cmd_Argv(6);
1782                                         }
1783                                 }
1784                         }
1785                 }
1786                 if (cubemapname && !cubemapname[0])
1787                         cubemapname = NULL;
1788                 if (radius >= 16 && color[0] >= 0 && color[1] >= 0 && color[2] >= 0 && style >= 0 && style < 256 && (color[0] >= 0.1 || color[1] >= 0.1 || color[2] >= 0.1))
1789                 {
1790                         VectorCopy(r_shadow_selectedlight->origin, origin);
1791                         R_Shadow_FreeWorldLight(r_shadow_selectedlight);
1792                         r_shadow_selectedlight = NULL;
1793                         R_Shadow_NewWorldLight(origin, radius, color, style, cubemapname);
1794                         return;
1795                 }
1796         }
1797         Con_Printf("usage: r_editlights_edit radius red green blue [style [cubemap]]\n");
1798 }
1799
1800 void R_Shadow_EditLights_Remove_f(void)
1801 {
1802         if (!r_editlights.integer)
1803         {
1804                 Con_Printf("Cannot remove light when not in editing mode.  Set r_editlights to 1.\n");
1805                 return;
1806         }
1807         if (!r_shadow_selectedlight)
1808         {
1809                 Con_Printf("No selected light.\n");
1810                 return;
1811         }
1812         R_Shadow_FreeSelectedWorldLight();
1813 }
1814
1815 void R_Shadow_EditLights_Init(void)
1816 {
1817         Cvar_RegisterVariable(&r_editlights);
1818         Cvar_RegisterVariable(&r_editlights_cursordistance);
1819         Cvar_RegisterVariable(&r_editlights_cursorpushback);
1820         Cvar_RegisterVariable(&r_editlights_cursorpushoff);
1821         Cvar_RegisterVariable(&r_editlights_cursorgrid);
1822         Cmd_AddCommand("r_editlights_clear", R_Shadow_EditLights_Clear_f);
1823         Cmd_AddCommand("r_editlights_reload", R_Shadow_EditLights_Reload_f);
1824         Cmd_AddCommand("r_editlights_save", R_Shadow_EditLights_Save_f);
1825         Cmd_AddCommand("r_editlights_spawn", R_Shadow_EditLights_Spawn_f);
1826         Cmd_AddCommand("r_editlights_edit", R_Shadow_EditLights_Edit_f);
1827         Cmd_AddCommand("r_editlights_remove", R_Shadow_EditLights_Remove_f);
1828         Cmd_AddCommand("r_editlights_importlightentitiesfrommap", R_Shadow_EditLights_ImportLightEntitiesFromMap_f);
1829         Cmd_AddCommand("r_editlights_importlightsfile", R_Shadow_EditLights_ImportLightsFile_f);
1830 }