gl_models.c

   1
   2 #include "quakedef.h"
   3
   4 //cvar_t gl_transform = {0, "gl_transform", "1"};
   5 cvar_t gl_lockarrays = {0, "gl_lockarrays", "1"};
   6
   7 typedef struct
   8 {
   9         float m[3][4];
  10 } zymbonematrix;
  11
  12 // LordHavoc: vertex array
  13 float *aliasvert;
  14 float *aliasvertnorm;
  15 float *aliasvertcolor;
  16 float *aliasvertcolor2;
  17 zymbonematrix *zymbonepose;
  18 int *aliasvertusage;
  19
  20 rmeshinfo_t aliasmeshinfo;
  21
  22 rtexture_t *chrometexture;
  23
  24 int arraylocked = false;
  25 void GL_LockArray(int first, int count)
  26 {
  27         if (gl_supportslockarrays && gl_lockarrays.integer)
  28         {
  29                 qglLockArraysEXT(first, count);
  30                 arraylocked = true;
  31         }
  32 }
  33
  34 void GL_UnlockArray(void)
  35 {
  36         if (arraylocked)
  37         {
  38                 qglUnlockArraysEXT();
  39                 arraylocked = false;
  40         }
  41 }
  42
  43 /*
  44 void GL_SetupModelTransform (vec3_t origin, vec3_t angles, vec_t scale)
  45 {
  46     glTranslatef (origin[0], origin[1], origin[2]);
  47
  48         if (scale != 1)
  49                 glScalef (scale, scale, scale);
  50         if (angles[1])
  51             glRotatef (angles[1],  0, 0, 1);
  52         if (angles[0])
  53             glRotatef (-angles[0],  0, 1, 0);
  54         if (angles[2])
  55             glRotatef (angles[2],  1, 0, 0);
  56 }
  57 */
  58
  59 rtexturepool_t *chrometexturepool;
  60
  61 // currently unused reflection effect texture
  62 void makechrometexture(void)
  63 {
  64         int i;
  65         byte noise[64*64];
  66         byte data[64*64][4];
  67
  68         fractalnoise(noise, 64, 8);
  69
  70         // convert to RGBA data
  71         for (i = 0;i < 64*64;i++)
  72         {
  73                 data[i][0] = data[i][1] = data[i][2] = noise[i];
  74                 data[i][3] = 255;
  75         }
  76
  77         chrometexture = R_LoadTexture (chrometexturepool, "chrometexture", 64, 64, &data[0][0], TEXTYPE_RGBA, TEXF_MIPMAP | TEXF_PRECACHE);
  78 }
  79
  80 mempool_t *gl_models_mempool;
  81
  82 void gl_models_start(void)
  83 {
  84         // allocate vertex processing arrays
  85         gl_models_mempool = Mem_AllocPool("GL_Models");
  86         aliasvert = Mem_Alloc(gl_models_mempool, sizeof(float[MD2MAX_VERTS][3]));
  87         aliasvertnorm = Mem_Alloc(gl_models_mempool, sizeof(float[MD2MAX_VERTS][3]));
  88         aliasvertcolor = Mem_Alloc(gl_models_mempool, sizeof(float[MD2MAX_VERTS][4]));
  89         aliasvertcolor2 = Mem_Alloc(gl_models_mempool, sizeof(float[MD2MAX_VERTS][4])); // used temporarily for tinted coloring
  90         zymbonepose = Mem_Alloc(gl_models_mempool, sizeof(zymbonematrix[256]));
  91         aliasvertusage = Mem_Alloc(gl_models_mempool, sizeof(int[MD2MAX_VERTS]));
  92         chrometexturepool = R_AllocTexturePool();
  93         makechrometexture();
  94 }
  95
  96 void gl_models_shutdown(void)
  97 {
  98         R_FreeTexturePool(&chrometexturepool);
  99         Mem_FreePool(&gl_models_mempool);
 100 }
 101
 102 void gl_models_newmap(void)
 103 {
 104 }
 105
 106 void GL_Models_Init(void)
 107 {
 108 //      Cvar_RegisterVariable(&gl_transform);
 109         Cvar_RegisterVariable(&gl_lockarrays);
 110
 111         R_RegisterModule("GL_Models", gl_models_start, gl_models_shutdown, gl_models_newmap);
 112 }
 113
 114 void R_AliasTransformVerts(int vertcount)
 115 {
 116         vec3_t point;
 117         float *av, *avn;
 118         av = aliasvert;
 119         avn = aliasvertnorm;
 120         while (vertcount >= 4)
 121         {
 122                 VectorCopy(av, point);softwaretransform(point, av);av += 3;
 123                 VectorCopy(av, point);softwaretransform(point, av);av += 3;
 124                 VectorCopy(av, point);softwaretransform(point, av);av += 3;
 125                 VectorCopy(av, point);softwaretransform(point, av);av += 3;
 126                 VectorCopy(avn, point);softwaretransformdirection(point, avn);avn += 3;
 127                 VectorCopy(avn, point);softwaretransformdirection(point, avn);avn += 3;
 128                 VectorCopy(avn, point);softwaretransformdirection(point, avn);avn += 3;
 129                 VectorCopy(avn, point);softwaretransformdirection(point, avn);avn += 3;
 130                 vertcount -= 4;
 131         }
 132         while(vertcount > 0)
 133         {
 134                 VectorCopy(av, point);softwaretransform(point, av);av += 3;
 135                 VectorCopy(avn, point);softwaretransformdirection(point, avn);avn += 3;
 136                 vertcount--;
 137         }
 138 }
 139
 140 void R_AliasLerpVerts(int vertcount,
 141                                           float lerp1, trivertx_t *verts1, vec3_t fscale1, vec3_t translate1,
 142                                           float lerp2, trivertx_t *verts2, vec3_t fscale2, vec3_t translate2,
 143                                           float lerp3, trivertx_t *verts3, vec3_t fscale3, vec3_t translate3,
 144                                           float lerp4, trivertx_t *verts4, vec3_t fscale4, vec3_t translate4)
 145 {
 146         int i;
 147         vec3_t scale1, scale2, scale3, scale4, translate;
 148         float *n1, *n2, *n3, *n4;
 149         float *av, *avn;
 150         av = aliasvert;
 151         avn = aliasvertnorm;
 152         VectorScale(fscale1, lerp1, scale1);
 153         if (lerp2)
 154         {
 155                 VectorScale(fscale2, lerp2, scale2);
 156                 if (lerp3)
 157                 {
 158                         VectorScale(fscale3, lerp3, scale3);
 159                         if (lerp4)
 160                         {
 161                                 VectorScale(fscale4, lerp4, scale4);
 162                                 translate[0] = translate1[0] * lerp1 + translate2[0] * lerp2 + translate3[0] * lerp3 + translate4[0] * lerp4;
 163                                 translate[1] = translate1[1] * lerp1 + translate2[1] * lerp2 + translate3[1] * lerp3 + translate4[1] * lerp4;
 164                                 translate[2] = translate1[2] * lerp1 + translate2[2] * lerp2 + translate3[2] * lerp3 + translate4[2] * lerp4;
 165                                 // generate vertices
 166                                 for (i = 0;i < vertcount;i++)
 167                                 {
 168                                         av[0] = verts1->v[0] * scale1[0] + verts2->v[0] * scale2[0] + verts3->v[0] * scale3[0] + verts4->v[0] * scale4[0] + translate[0];
 169                                         av[1] = verts1->v[1] * scale1[1] + verts2->v[1] * scale2[1] + verts3->v[1] * scale3[1] + verts4->v[1] * scale4[1] + translate[1];
 170                                         av[2] = verts1->v[2] * scale1[2] + verts2->v[2] * scale2[2] + verts3->v[2] * scale3[2] + verts4->v[2] * scale4[2] + translate[2];
 171                                         n1 = m_bytenormals[verts1->lightnormalindex];
 172                                         n2 = m_bytenormals[verts2->lightnormalindex];
 173                                         n3 = m_bytenormals[verts3->lightnormalindex];
 174                                         n4 = m_bytenormals[verts4->lightnormalindex];
 175                                         avn[0] = n1[0] * lerp1 + n2[0] * lerp2 + n3[0] * lerp3 + n4[0] * lerp4;
 176                                         avn[1] = n1[1] * lerp1 + n2[1] * lerp2 + n3[1] * lerp3 + n4[1] * lerp4;
 177                                         avn[2] = n1[2] * lerp1 + n2[2] * lerp2 + n3[2] * lerp3 + n4[2] * lerp4;
 178                                         av += 3;
 179                                         avn += 3;
 180                                         verts1++;verts2++;verts3++;verts4++;
 181                                 }
 182                         }
 183                         else
 184                         {
 185                                 translate[0] = translate1[0] * lerp1 + translate2[0] * lerp2 + translate3[0] * lerp3;
 186                                 translate[1] = translate1[1] * lerp1 + translate2[1] * lerp2 + translate3[1] * lerp3;
 187                                 translate[2] = translate1[2] * lerp1 + translate2[2] * lerp2 + translate3[2] * lerp3;
 188                                 // generate vertices
 189                                 for (i = 0;i < vertcount;i++)
 190                                 {
 191                                         av[0] = verts1->v[0] * scale1[0] + verts2->v[0] * scale2[0] + verts3->v[0] * scale3[0] + translate[0];
 192                                         av[1] = verts1->v[1] * scale1[1] + verts2->v[1] * scale2[1] + verts3->v[1] * scale3[1] + translate[1];
 193                                         av[2] = verts1->v[2] * scale1[2] + verts2->v[2] * scale2[2] + verts3->v[2] * scale3[2] + translate[2];
 194                                         n1 = m_bytenormals[verts1->lightnormalindex];
 195                                         n2 = m_bytenormals[verts2->lightnormalindex];
 196                                         n3 = m_bytenormals[verts3->lightnormalindex];
 197                                         avn[0] = n1[0] * lerp1 + n2[0] * lerp2 + n3[0] * lerp3;
 198                                         avn[1] = n1[1] * lerp1 + n2[1] * lerp2 + n3[1] * lerp3;
 199                                         avn[2] = n1[2] * lerp1 + n2[2] * lerp2 + n3[2] * lerp3;
 200                                         av += 3;
 201                                         avn += 3;
 202                                         verts1++;verts2++;verts3++;
 203                                 }
 204                         }
 205                 }
 206                 else
 207                 {
 208                         translate[0] = translate1[0] * lerp1 + translate2[0] * lerp2;
 209                         translate[1] = translate1[1] * lerp1 + translate2[1] * lerp2;
 210                         translate[2] = translate1[2] * lerp1 + translate2[2] * lerp2;
 211                         // generate vertices
 212                         for (i = 0;i < vertcount;i++)
 213                         {
 214                                 av[0] = verts1->v[0] * scale1[0] + verts2->v[0] * scale2[0] + translate[0];
 215                                 av[1] = verts1->v[1] * scale1[1] + verts2->v[1] * scale2[1] + translate[1];
 216                                 av[2] = verts1->v[2] * scale1[2] + verts2->v[2] * scale2[2] + translate[2];
 217                                 n1 = m_bytenormals[verts1->lightnormalindex];
 218                                 n2 = m_bytenormals[verts2->lightnormalindex];
 219                                 avn[0] = n1[0] * lerp1 + n2[0] * lerp2;
 220                                 avn[1] = n1[1] * lerp1 + n2[1] * lerp2;
 221                                 avn[2] = n1[2] * lerp1 + n2[2] * lerp2;
 222                                 av += 3;
 223                                 avn += 3;
 224                                 verts1++;verts2++;
 225                         }
 226                 }
 227         }
 228         else
 229         {
 230                 translate[0] = translate1[0] * lerp1;
 231                 translate[1] = translate1[1] * lerp1;
 232                 translate[2] = translate1[2] * lerp1;
 233                 // generate vertices
 234                 if (lerp1 != 1)
 235                 {
 236                         // general but almost never used case
 237                         for (i = 0;i < vertcount;i++)
 238                         {
 239                                 av[0] = verts1->v[0] * scale1[0] + translate[0];
 240                                 av[1] = verts1->v[1] * scale1[1] + translate[1];
 241                                 av[2] = verts1->v[2] * scale1[2] + translate[2];
 242                                 n1 = m_bytenormals[verts1->lightnormalindex];
 243                                 avn[0] = n1[0] * lerp1;
 244                                 avn[1] = n1[1] * lerp1;
 245                                 avn[2] = n1[2] * lerp1;
 246                                 av += 3;
 247                                 avn += 3;
 248                                 verts1++;
 249                         }
 250                 }
 251                 else
 252                 {
 253                         // fast normal case
 254                         for (i = 0;i < vertcount;i++)
 255                         {
 256                                 av[0] = verts1->v[0] * scale1[0] + translate[0];
 257                                 av[1] = verts1->v[1] * scale1[1] + translate[1];
 258                                 av[2] = verts1->v[2] * scale1[2] + translate[2];
 259                                 VectorCopy(m_bytenormals[verts1->lightnormalindex], avn);
 260                                 av += 3;
 261                                 avn += 3;
 262                                 verts1++;
 263                         }
 264                 }
 265         }
 266 }
 267
 268 void GL_DrawModelMesh(rtexture_t *skin, float *colors, float cred, float cgreen, float cblue)
 269 {
 270         aliasmeshinfo.tex[0] = R_GetTexture(skin);
 271         aliasmeshinfo.color = colors;
 272         if (colors == NULL)
 273         {
 274                 aliasmeshinfo.cr = cred;
 275                 aliasmeshinfo.cg = cgreen;
 276                 aliasmeshinfo.cb = cblue;
 277                 aliasmeshinfo.ca = currentrenderentity->alpha;
 278         }
 279
 280         R_Mesh_Draw(&aliasmeshinfo);
 281
 282         // leave it in a state for additional passes
 283         aliasmeshinfo.blendfunc1 = GL_SRC_ALPHA;
 284         aliasmeshinfo.blendfunc2 = GL_ONE;
 285 }
 286
 287 void R_TintModel(float *in, float *out, int verts, float r, float g, float b)
 288 {
 289         int i;
 290         for (i = 0;i < verts;i++)
 291         {
 292                 out[0] = in[0] * r;
 293                 out[1] = in[1] * g;
 294                 out[2] = in[2] * b;
 295                 out[3] = in[3];
 296                 in += 4;
 297                 out += 4;
 298         }
 299 }
 300
 301 void R_SetupMDLMD2Frames(skinframe_t **skinframe)
 302 {
 303         md2frame_t *frame1, *frame2, *frame3, *frame4;
 304         trivertx_t *frame1verts, *frame2verts, *frame3verts, *frame4verts;
 305         model_t *model;
 306         model = currentrenderentity->model;
 307
 308         if (model->skinscenes[currentrenderentity->skinnum].framecount > 1)
 309                 *skinframe = &model->skinframes[model->skinscenes[currentrenderentity->skinnum].firstframe + (int) (cl.time * 10) % model->skinscenes[currentrenderentity->skinnum].framecount];
 310         else
 311                 *skinframe = &model->skinframes[model->skinscenes[currentrenderentity->skinnum].firstframe];
 312
 313         softwaretransformforentity(currentrenderentity);
 314
 315         frame1 = &model->mdlmd2data_frames[currentrenderentity->frameblend[0].frame];
 316         frame2 = &model->mdlmd2data_frames[currentrenderentity->frameblend[1].frame];
 317         frame3 = &model->mdlmd2data_frames[currentrenderentity->frameblend[2].frame];
 318         frame4 = &model->mdlmd2data_frames[currentrenderentity->frameblend[3].frame];
 319         frame1verts = &model->mdlmd2data_pose[currentrenderentity->frameblend[0].frame * model->numverts];
 320         frame2verts = &model->mdlmd2data_pose[currentrenderentity->frameblend[1].frame * model->numverts];
 321         frame3verts = &model->mdlmd2data_pose[currentrenderentity->frameblend[2].frame * model->numverts];
 322         frame4verts = &model->mdlmd2data_pose[currentrenderentity->frameblend[3].frame * model->numverts];
 323         /*
 324         if (currentrenderentity->frameblend[0].lerp)
 325                 Con_Printf("frame1: %i/%i %s scale %f %f %f translate %f %f %f\n", currentrenderentity->frameblend[0].frame, model->numframes, frame1->name, frame1->scale[0], frame1->scale[1], frame1->scale[2], frame1->translate[0], frame1->translate[1], frame1->translate[2]);
 326         if (currentrenderentity->frameblend[1].lerp)
 327                 Con_Printf("frame2: %i/%i %s scale %f %f %f translate %f %f %f\n", currentrenderentity->frameblend[0].frame, model->numframes, frame2->name, frame2->scale[0], frame2->scale[1], frame2->scale[2], frame2->translate[0], frame2->translate[1], frame2->translate[2]);
 328         if (currentrenderentity->frameblend[2].lerp)
 329                 Con_Printf("frame3: %i/%i %s scale %f %f %f translate %f %f %f\n", currentrenderentity->frameblend[0].frame, model->numframes, frame3->name, frame3->scale[0], frame3->scale[1], frame3->scale[2], frame3->translate[0], frame3->translate[1], frame3->translate[2]);
 330         if (currentrenderentity->frameblend[3].lerp)
 331                 Con_Printf("frame4: %i/%i %s scale %f %f %f translate %f %f %f\n", currentrenderentity->frameblend[0].frame, model->numframes, frame4->name, frame4->scale[0], frame4->scale[1], frame4->scale[2], frame4->translate[0], frame4->translate[1], frame4->translate[2]);
 332         */
 333         R_AliasLerpVerts(model->numverts,
 334                 currentrenderentity->frameblend[0].lerp, frame1verts, frame1->scale, frame1->translate,
 335                 currentrenderentity->frameblend[1].lerp, frame2verts, frame2->scale, frame2->translate,
 336                 currentrenderentity->frameblend[2].lerp, frame3verts, frame3->scale, frame3->translate,
 337                 currentrenderentity->frameblend[3].lerp, frame4verts, frame4->scale, frame4->translate);
 338         R_AliasTransformVerts(model->numverts);
 339
 340         R_LightModel(model->numverts);
 341 }
 342
 343 void R_DrawQ1AliasModel (void)
 344 {
 345         float fog;
 346         vec3_t diff;
 347         model_t *model;
 348         skinframe_t *skinframe;
 349
 350         model = currentrenderentity->model;
 351
 352         R_SetupMDLMD2Frames(&skinframe);
 353
 354         memset(&aliasmeshinfo, 0, sizeof(aliasmeshinfo));
 355
 356         aliasmeshinfo.vertex = aliasvert;
 357         aliasmeshinfo.vertexstep = sizeof(float[3]);
 358         aliasmeshinfo.numverts = model->numverts;
 359         aliasmeshinfo.numtriangles = model->numtris;
 360         aliasmeshinfo.index = model->mdldata_indices;
 361         aliasmeshinfo.colorstep = sizeof(float[4]);
 362         aliasmeshinfo.texcoords[0] = model->mdldata_texcoords;
 363         aliasmeshinfo.texcoordstep[0] = sizeof(float[2]);
 364
 365         fog = 0;
 366         if (fogenabled)
 367         {
 368                 VectorSubtract(currentrenderentity->origin, r_origin, diff);
 369                 fog = exp(fogdensity/DotProduct(diff,diff));
 370                 if (fog > 1)
 371                         fog = 1;
 372                 if (fog < 0.01f)
 373                         fog = 0;
 374                 // fog method: darken, additive fog
 375                 // 1. render model as normal, scaled by inverse of fog alpha (darkens it)
 376                 // 2. render fog as additive
 377         }
 378
 379         if (currentrenderentity->effects & EF_ADDITIVE)
 380         {
 381                 aliasmeshinfo.transparent = true;
 382                 aliasmeshinfo.blendfunc1 = GL_SRC_ALPHA;
 383                 aliasmeshinfo.blendfunc2 = GL_ONE;
 384         }
 385         else if (currentrenderentity->alpha != 1.0 || skinframe->fog != NULL)
 386         {
 387                 aliasmeshinfo.transparent = true;
 388                 aliasmeshinfo.blendfunc1 = GL_SRC_ALPHA;
 389                 aliasmeshinfo.blendfunc2 = GL_ONE_MINUS_SRC_ALPHA;
 390         }
 391         else
 392         {
 393                 aliasmeshinfo.transparent = false;
 394                 aliasmeshinfo.blendfunc1 = GL_ONE;
 395                 aliasmeshinfo.blendfunc2 = GL_ZERO;
 396         }
 397
 398         // darken source
 399         if (fog)
 400                 R_TintModel(aliasvertcolor, aliasvertcolor, model->numverts, 1 - fog, 1 - fog, 1 - fog);
 401
 402         if (skinframe->base || skinframe->pants || skinframe->shirt || skinframe->glow || skinframe->merged)
 403         {
 404                 if (currentrenderentity->colormap >= 0 && (skinframe->base || skinframe->pants || skinframe->shirt))
 405                 {
 406                         int c;
 407                         byte *color;
 408                         if (skinframe->base)
 409                                 GL_DrawModelMesh(skinframe->base, aliasvertcolor, 0, 0, 0);
 410                         if (skinframe->pants)
 411                         {
 412                                 c = (currentrenderentity->colormap & 0xF) << 4;c += (c >= 128 && c < 224) ? 4 : 12; // 128-224 are backwards ranges
 413                                 color = (byte *) (&d_8to24table[c]);
 414                                 if (c >= 224) // fullbright ranges
 415                                         GL_DrawModelMesh(skinframe->pants, NULL, color[0] * (1.0f / 255.0f), color[1] * (1.0f / 255.0f), color[2] * (1.0f / 255.0f));
 416                                 else
 417                                 {
 418                                         R_TintModel(aliasvertcolor, aliasvertcolor2, model->numverts, color[0] * (1.0f / 255.0f), color[1] * (1.0f / 255.0f), color[2] * (1.0f / 255.0f));
 419                                         GL_DrawModelMesh(skinframe->pants, aliasvertcolor2, 0, 0, 0);
 420                                 }
 421                         }
 422                         if (skinframe->shirt)
 423                         {
 424                                 c = currentrenderentity->colormap & 0xF0      ;c += (c >= 128 && c < 224) ? 4 : 12; // 128-224 are backwards ranges
 425                                 color = (byte *) (&d_8to24table[c]);
 426                                 if (c >= 224) // fullbright ranges
 427                                         GL_DrawModelMesh(skinframe->shirt, NULL, color[0] * (1.0f / 255.0f), color[1] * (1.0f / 255.0f), color[2] * (1.0f / 255.0f));
 428                                 else
 429                                 {
 430                                         R_TintModel(aliasvertcolor, aliasvertcolor2, model->numverts, color[0] * (1.0f / 255.0f), color[1] * (1.0f / 255.0f), color[2] * (1.0f / 255.0f));
 431                                         GL_DrawModelMesh(skinframe->shirt, aliasvertcolor2, 0, 0, 0);
 432                                 }
 433                         }
 434                 }
 435                 else
 436                 {
 437                         if (skinframe->merged)
 438                                 GL_DrawModelMesh(skinframe->merged, aliasvertcolor, 0, 0, 0);
 439                         else
 440                         {
 441                                 if (skinframe->base) GL_DrawModelMesh(skinframe->base, aliasvertcolor, 0, 0, 0);
 442                                 if (skinframe->pants) GL_DrawModelMesh(skinframe->pants, aliasvertcolor, 0, 0, 0);
 443                                 if (skinframe->shirt) GL_DrawModelMesh(skinframe->shirt, aliasvertcolor, 0, 0, 0);
 444                         }
 445                 }
 446                 if (skinframe->glow) GL_DrawModelMesh(skinframe->glow, NULL, 1 - fog, 1 - fog, 1 - fog);
 447         }
 448         else
 449                 GL_DrawModelMesh(0, NULL, 1 - fog, 1 - fog, 1 - fog);
 450
 451         if (fog)
 452         {
 453                 aliasmeshinfo.tex[0] = R_GetTexture(skinframe->fog);
 454                 aliasmeshinfo.blendfunc1 = GL_SRC_ALPHA;
 455                 aliasmeshinfo.blendfunc2 = GL_ONE;
 456                 aliasmeshinfo.color = NULL;
 457
 458                 aliasmeshinfo.cr = fogcolor[0];
 459                 aliasmeshinfo.cg = fogcolor[1];
 460                 aliasmeshinfo.cb = fogcolor[2];
 461                 aliasmeshinfo.ca = currentrenderentity->alpha * fog;
 462
 463                 R_Mesh_Draw(&aliasmeshinfo);
 464         }
 465 }
 466
 467 void R_DrawQ2AliasModel (void)
 468 {
 469         int *order, count;
 470         vec3_t diff;
 471         skinframe_t *skinframe;
 472         model_t *model;
 473
 474         model = currentrenderentity->model;
 475
 476         R_SetupMDLMD2Frames(&skinframe);
 477
 478         if (!r_render.integer)
 479                 return;
 480
 481         // FIXME FIXME FIXME rewrite loader to convert to triangle mesh
 482         glBindTexture(GL_TEXTURE_2D, R_GetTexture(skinframe->base));
 483
 484         if (currentrenderentity->effects & EF_ADDITIVE)
 485         {
 486                 glBlendFunc(GL_SRC_ALPHA, GL_ONE); // additive rendering
 487                 glEnable(GL_BLEND);
 488                 glDepthMask(0);
 489         }
 490         else if (currentrenderentity->alpha != 1.0 || R_TextureHasAlpha(skinframe->base))
 491         {
 492                 glBlendFunc(GL_SRC_ALPHA, GL_ONE_MINUS_SRC_ALPHA);
 493                 glEnable(GL_BLEND);
 494                 glDepthMask(0);
 495         }
 496         else
 497         {
 498                 glDisable(GL_BLEND);
 499                 glDepthMask(1);
 500         }
 501
 502         // LordHavoc: big mess...
 503         // using vertex arrays only slightly, although it is enough to prevent duplicates
 504         // (saving half the transforms)
 505         glVertexPointer(3, GL_FLOAT, sizeof(float[3]), aliasvert);
 506         glColorPointer(4, GL_FLOAT, sizeof(float[4]), aliasvertcolor);
 507         glEnableClientState(GL_VERTEX_ARRAY);
 508         glEnableClientState(GL_COLOR_ARRAY);
 509
 510         GL_LockArray(0, model->numverts);
 511
 512         order = model->md2data_glcmds;
 513         while(1)
 514         {
 515                 if (!(count = *order++))
 516                         break;
 517                 if (count > 0)
 518                         glBegin(GL_TRIANGLE_STRIP);
 519                 else
 520                 {
 521                         glBegin(GL_TRIANGLE_FAN);
 522                         count = -count;
 523                 }
 524                 do
 525                 {
 526                         glTexCoord2f(((float *)order)[0], ((float *)order)[1]);
 527                         glArrayElement(order[2]);
 528                         order += 3;
 529                 }
 530                 while (count--);
 531         }
 532
 533         GL_UnlockArray();
 534
 535         glDisableClientState(GL_COLOR_ARRAY);
 536         glDisableClientState(GL_VERTEX_ARRAY);
 537
 538         if (fogenabled)
 539         {
 540                 glDisable (GL_TEXTURE_2D);
 541                 glBlendFunc(GL_SRC_ALPHA, GL_ONE_MINUS_SRC_ALPHA);
 542                 glEnable (GL_BLEND);
 543                 glDepthMask(0); // disable zbuffer updates
 544
 545                 VectorSubtract(currentrenderentity->origin, r_origin, diff);
 546                 glColor4f(fogcolor[0], fogcolor[1], fogcolor[2], currentrenderentity->alpha * exp(fogdensity/DotProduct(diff,diff)));
 547
 548                 // LordHavoc: big mess...
 549                 // using vertex arrays only slightly, although it is enough to prevent duplicates
 550                 // (saving half the transforms)
 551                 glVertexPointer(3, GL_FLOAT, sizeof(float[3]), aliasvert);
 552                 glEnableClientState(GL_VERTEX_ARRAY);
 553
 554                 GL_LockArray(0, model->numverts);
 555
 556                 order = model->md2data_glcmds;
 557                 while(1)
 558                 {
 559                         if (!(count = *order++))
 560                                 break;
 561                         if (count > 0)
 562                                 glBegin(GL_TRIANGLE_STRIP);
 563                         else
 564                         {
 565                                 glBegin(GL_TRIANGLE_FAN);
 566                                 count = -count;
 567                         }
 568                         do
 569                         {
 570                                 glArrayElement(order[2]);
 571                                 order += 3;
 572                         }
 573                         while (count--);
 574                 }
 575
 576                 GL_UnlockArray();
 577
 578                 glDisableClientState(GL_VERTEX_ARRAY);
 579
 580                 glEnable (GL_TEXTURE_2D);
 581                 glColor3f (1,1,1);
 582         }
 583
 584         glBlendFunc(GL_SRC_ALPHA, GL_ONE_MINUS_SRC_ALPHA);
 585         glEnable (GL_BLEND);
 586         glDepthMask(1);
 587 }
 588
 589 void ZymoticLerpBones(int count, zymbonematrix *bonebase, frameblend_t *blend, zymbone_t *bone, float rootorigin[3], float rootangles[3], float rootscale)
 590 {
 591         float lerp1, lerp2, lerp3, lerp4;
 592         zymbonematrix *out, rootmatrix, m, *bone1, *bone2, *bone3, *bone4;
 593         out = zymbonepose;
 594         AngleVectors(rootangles, rootmatrix.m[0], rootmatrix.m[1], rootmatrix.m[2]);
 595         VectorScale(rootmatrix.m[0], rootscale, rootmatrix.m[0]);
 596         VectorScale(rootmatrix.m[1], rootscale, rootmatrix.m[1]);
 597         VectorScale(rootmatrix.m[2], rootscale, rootmatrix.m[2]);
 598         rootmatrix.m[0][3] = rootorigin[0];
 599         rootmatrix.m[1][3] = rootorigin[1];
 600         rootmatrix.m[2][3] = rootorigin[2];
 601         bone1 = bonebase + blend[0].frame * count;
 602         lerp1 = blend[0].lerp;
 603         if (blend[1].lerp)
 604         {
 605                 bone2 = bonebase + blend[1].frame * count;
 606                 lerp2 = blend[1].lerp;
 607                 if (blend[2].lerp)
 608                 {
 609                         bone3 = bonebase + blend[2].frame * count;
 610                         lerp3 = blend[2].lerp;
 611                         if (blend[3].lerp)
 612                         {
 613                                 // 4 poses
 614                                 bone4 = bonebase + blend[3].frame * count;
 615                                 lerp4 = blend[3].lerp;
 616                                 while(count--)
 617                                 {
 618                                         // interpolate matrices
 619                                         m.m[0][0] = bone1->m[0][0] * lerp1 + bone2->m[0][0] * lerp2 + bone3->m[0][0] * lerp3 + bone4->m[0][0] * lerp4;
 620                                         m.m[0][1] = bone1->m[0][1] * lerp1 + bone2->m[0][1] * lerp2 + bone3->m[0][1] * lerp3 + bone4->m[0][1] * lerp4;
 621                                         m.m[0][2] = bone1->m[0][2] * lerp1 + bone2->m[0][2] * lerp2 + bone3->m[0][2] * lerp3 + bone4->m[0][2] * lerp4;
 622                                         m.m[0][3] = bone1->m[0][3] * lerp1 + bone2->m[0][3] * lerp2 + bone3->m[0][3] * lerp3 + bone4->m[0][3] * lerp4;
 623                                         m.m[1][0] = bone1->m[1][0] * lerp1 + bone2->m[1][0] * lerp2 + bone3->m[1][0] * lerp3 + bone4->m[1][0] * lerp4;
 624                                         m.m[1][1] = bone1->m[1][1] * lerp1 + bone2->m[1][1] * lerp2 + bone3->m[1][1] * lerp3 + bone4->m[1][1] * lerp4;
 625                                         m.m[1][2] = bone1->m[1][2] * lerp1 + bone2->m[1][2] * lerp2 + bone3->m[1][2] * lerp3 + bone4->m[1][2] * lerp4;
 626                                         m.m[1][3] = bone1->m[1][3] * lerp1 + bone2->m[1][3] * lerp2 + bone3->m[1][3] * lerp3 + bone4->m[1][3] * lerp4;
 627                                         m.m[2][0] = bone1->m[2][0] * lerp1 + bone2->m[2][0] * lerp2 + bone3->m[2][0] * lerp3 + bone4->m[2][0] * lerp4;
 628                                         m.m[2][1] = bone1->m[2][1] * lerp1 + bone2->m[2][1] * lerp2 + bone3->m[2][1] * lerp3 + bone4->m[2][1] * lerp4;
 629                                         m.m[2][2] = bone1->m[2][2] * lerp1 + bone2->m[2][2] * lerp2 + bone3->m[2][2] * lerp3 + bone4->m[2][2] * lerp4;
 630                                         m.m[2][3] = bone1->m[2][3] * lerp1 + bone2->m[2][3] * lerp2 + bone3->m[2][3] * lerp3 + bone4->m[2][3] * lerp4;
 631                                         if (bone->parent >= 0)
 632                                                 R_ConcatTransforms(&zymbonepose[bone->parent].m[0], &m.m[0], &out->m[0]);
 633                                         else
 634                                                 R_ConcatTransforms(&rootmatrix.m[0], &m.m[0], &out->m[0]);
 635                                         bone1++;
 636                                         bone2++;
 637                                         bone3++;
 638                                         bone4++;
 639                                         bone++;
 640                                         out++;
 641                                 }
 642                         }
 643                         else
 644                         {
 645                                 // 3 poses
 646                                 while(count--)
 647                                 {
 648                                         // interpolate matrices
 649                                         m.m[0][0] = bone1->m[0][0] * lerp1 + bone2->m[0][0] * lerp2 + bone3->m[0][0] * lerp3;
 650                                         m.m[0][1] = bone1->m[0][1] * lerp1 + bone2->m[0][1] * lerp2 + bone3->m[0][1] * lerp3;
 651                                         m.m[0][2] = bone1->m[0][2] * lerp1 + bone2->m[0][2] * lerp2 + bone3->m[0][2] * lerp3;
 652                                         m.m[0][3] = bone1->m[0][3] * lerp1 + bone2->m[0][3] * lerp2 + bone3->m[0][3] * lerp3;
 653                                         m.m[1][0] = bone1->m[1][0] * lerp1 + bone2->m[1][0] * lerp2 + bone3->m[1][0] * lerp3;
 654                                         m.m[1][1] = bone1->m[1][1] * lerp1 + bone2->m[1][1] * lerp2 + bone3->m[1][1] * lerp3;
 655                                         m.m[1][2] = bone1->m[1][2] * lerp1 + bone2->m[1][2] * lerp2 + bone3->m[1][2] * lerp3;
 656                                         m.m[1][3] = bone1->m[1][3] * lerp1 + bone2->m[1][3] * lerp2 + bone3->m[1][3] * lerp3;
 657                                         m.m[2][0] = bone1->m[2][0] * lerp1 + bone2->m[2][0] * lerp2 + bone3->m[2][0] * lerp3;
 658                                         m.m[2][1] = bone1->m[2][1] * lerp1 + bone2->m[2][1] * lerp2 + bone3->m[2][1] * lerp3;
 659                                         m.m[2][2] = bone1->m[2][2] * lerp1 + bone2->m[2][2] * lerp2 + bone3->m[2][2] * lerp3;
 660                                         m.m[2][3] = bone1->m[2][3] * lerp1 + bone2->m[2][3] * lerp2 + bone3->m[2][3] * lerp3;
 661                                         if (bone->parent >= 0)
 662                                                 R_ConcatTransforms(&zymbonepose[bone->parent].m[0], &m.m[0], &out->m[0]);
 663                                         else
 664                                                 R_ConcatTransforms(&rootmatrix.m[0], &m.m[0], &out->m[0]);
 665                                         bone1++;
 666                                         bone2++;
 667                                         bone3++;
 668                                         bone++;
 669                                         out++;
 670                                 }
 671                         }
 672                 }
 673                 else
 674                 {
 675                         // 2 poses
 676                         while(count--)
 677                         {
 678                                 // interpolate matrices
 679                                 m.m[0][0] = bone1->m[0][0] * lerp1 + bone2->m[0][0] * lerp2;
 680                                 m.m[0][1] = bone1->m[0][1] * lerp1 + bone2->m[0][1] * lerp2;
 681                                 m.m[0][2] = bone1->m[0][2] * lerp1 + bone2->m[0][2] * lerp2;
 682                                 m.m[0][3] = bone1->m[0][3] * lerp1 + bone2->m[0][3] * lerp2;
 683                                 m.m[1][0] = bone1->m[1][0] * lerp1 + bone2->m[1][0] * lerp2;
 684                                 m.m[1][1] = bone1->m[1][1] * lerp1 + bone2->m[1][1] * lerp2;
 685                                 m.m[1][2] = bone1->m[1][2] * lerp1 + bone2->m[1][2] * lerp2;
 686                                 m.m[1][3] = bone1->m[1][3] * lerp1 + bone2->m[1][3] * lerp2;
 687                                 m.m[2][0] = bone1->m[2][0] * lerp1 + bone2->m[2][0] * lerp2;
 688                                 m.m[2][1] = bone1->m[2][1] * lerp1 + bone2->m[2][1] * lerp2;
 689                                 m.m[2][2] = bone1->m[2][2] * lerp1 + bone2->m[2][2] * lerp2;
 690                                 m.m[2][3] = bone1->m[2][3] * lerp1 + bone2->m[2][3] * lerp2;
 691                                 if (bone->parent >= 0)
 692                                         R_ConcatTransforms(&zymbonepose[bone->parent].m[0], &m.m[0], &out->m[0]);
 693                                 else
 694                                         R_ConcatTransforms(&rootmatrix.m[0], &m.m[0], &out->m[0]);
 695                                 bone1++;
 696                                 bone2++;
 697                                 bone++;
 698                                 out++;
 699                         }
 700                 }
 701         }
 702         else
 703         {
 704                 // 1 pose
 705                 if (lerp1 != 1)
 706                 {
 707                         // lerp != 1.0
 708                         while(count--)
 709                         {
 710                                 // interpolate matrices
 711                                 m.m[0][0] = bone1->m[0][0] * lerp1;
 712                                 m.m[0][1] = bone1->m[0][1] * lerp1;
 713                                 m.m[0][2] = bone1->m[0][2] * lerp1;
 714                                 m.m[0][3] = bone1->m[0][3] * lerp1;
 715                                 m.m[1][0] = bone1->m[1][0] * lerp1;
 716                                 m.m[1][1] = bone1->m[1][1] * lerp1;
 717                                 m.m[1][2] = bone1->m[1][2] * lerp1;
 718                                 m.m[1][3] = bone1->m[1][3] * lerp1;
 719                                 m.m[2][0] = bone1->m[2][0] * lerp1;
 720                                 m.m[2][1] = bone1->m[2][1] * lerp1;
 721                                 m.m[2][2] = bone1->m[2][2] * lerp1;
 722                                 m.m[2][3] = bone1->m[2][3] * lerp1;
 723                                 if (bone->parent >= 0)
 724                                         R_ConcatTransforms(&zymbonepose[bone->parent].m[0], &m.m[0], &out->m[0]);
 725                                 else
 726                                         R_ConcatTransforms(&rootmatrix.m[0], &m.m[0], &out->m[0]);
 727                                 bone1++;
 728                                 bone++;
 729                                 out++;
 730                         }
 731                 }
 732                 else
 733                 {
 734                         // lerp == 1.0
 735                         while(count--)
 736                         {
 737                                 if (bone->parent >= 0)
 738                                         R_ConcatTransforms(&zymbonepose[bone->parent].m[0], &bone1->m[0], &out->m[0]);
 739                                 else
 740                                         R_ConcatTransforms(&rootmatrix.m[0], &bone1->m[0], &out->m[0]);
 741                                 bone1++;
 742                                 bone++;
 743                                 out++;
 744                         }
 745                 }
 746         }
 747 }
 748
 749 void ZymoticTransformVerts(int vertcount, int *bonecounts, zymvertex_t *vert)
 750 {
 751         int c;
 752         float *out = aliasvert;
 753         zymbonematrix *matrix;
 754         while(vertcount--)
 755         {
 756                 c = *bonecounts++;
 757                 // FIXME: validate bonecounts at load time (must be >= 1)
 758                 if (c == 1)
 759                 {
 760                         matrix = &zymbonepose[vert->bonenum];
 761                         out[0] = vert->origin[0] * matrix->m[0][0] + vert->origin[1] * matrix->m[0][1] + vert->origin[2] * matrix->m[0][2] + matrix->m[0][3];
 762                         out[1] = vert->origin[0] * matrix->m[1][0] + vert->origin[1] * matrix->m[1][1] + vert->origin[2] * matrix->m[1][2] + matrix->m[1][3];
 763                         out[2] = vert->origin[0] * matrix->m[2][0] + vert->origin[1] * matrix->m[2][1] + vert->origin[2] * matrix->m[2][2] + matrix->m[2][3];
 764                         vert++;
 765                 }
 766                 else
 767                 {
 768                         VectorClear(out);
 769                         while(c--)
 770                         {
 771                                 matrix = &zymbonepose[vert->bonenum];
 772                                 out[0] += vert->origin[0] * matrix->m[0][0] + vert->origin[1] * matrix->m[0][1] + vert->origin[2] * matrix->m[0][2] + matrix->m[0][3];
 773                                 out[1] += vert->origin[0] * matrix->m[1][0] + vert->origin[1] * matrix->m[1][1] + vert->origin[2] * matrix->m[1][2] + matrix->m[1][3];
 774                                 out[2] += vert->origin[0] * matrix->m[2][0] + vert->origin[1] * matrix->m[2][1] + vert->origin[2] * matrix->m[2][2] + matrix->m[2][3];
 775                                 vert++;
 776                         }
 777                 }
 778                 out += 3;
 779         }
 780 }
 781
 782 void ZymoticCalcNormals(int vertcount, int shadercount, int *renderlist)
 783 {
 784         int a, b, c, d;
 785         float *out, v1[3], v2[3], normal[3];
 786         int *u;
 787         // clear normals
 788         memset(aliasvertnorm, 0, sizeof(float[3]) * vertcount);
 789         memset(aliasvertusage, 0, sizeof(int) * vertcount);
 790         // parse render list and accumulate surface normals
 791         while(shadercount--)
 792         {
 793                 d = *renderlist++;
 794                 while (d--)
 795                 {
 796                         a = renderlist[0]*3;
 797                         b = renderlist[1]*3;
 798                         c = renderlist[2]*3;
 799                         v1[0] = aliasvert[a+0] - aliasvert[b+0];
 800                         v1[1] = aliasvert[a+1] - aliasvert[b+1];
 801                         v1[2] = aliasvert[a+2] - aliasvert[b+2];
 802                         v2[0] = aliasvert[c+0] - aliasvert[b+0];
 803                         v2[1] = aliasvert[c+1] - aliasvert[b+1];
 804                         v2[2] = aliasvert[c+2] - aliasvert[b+2];
 805                         CrossProduct(v1, v2, normal);
 806                         VectorNormalizeFast(normal);
 807                         // add surface normal to vertices
 808                         aliasvertnorm[a+0] += normal[0];
 809                         aliasvertnorm[a+1] += normal[1];
 810                         aliasvertnorm[a+2] += normal[2];
 811                         aliasvertusage[a]++;
 812                         aliasvertnorm[b+0] += normal[0];
 813                         aliasvertnorm[b+1] += normal[1];
 814                         aliasvertnorm[b+2] += normal[2];
 815                         aliasvertusage[b]++;
 816                         aliasvertnorm[c+0] += normal[0];
 817                         aliasvertnorm[c+1] += normal[1];
 818                         aliasvertnorm[c+2] += normal[2];
 819                         aliasvertusage[c]++;
 820                         renderlist += 3;
 821                 }
 822         }
 823         // average surface normals
 824         out = aliasvertnorm;
 825         u = aliasvertusage;
 826         while(vertcount--)
 827         {
 828                 if (*u > 1)
 829                 {
 830                         a = ixtable[*u];
 831                         out[0] *= a;
 832                         out[1] *= a;
 833                         out[2] *= a;
 834                 }
 835                 u++;
 836                 out += 3;
 837         }
 838 }
 839
 840 void GL_DrawZymoticModelMesh(zymtype1header_t *m)
 841 {
 842         int i, *renderlist;
 843         rtexture_t **texture;
 844
 845         // FIXME: do better fog
 846         renderlist = (int *)(m->lump_render.start + (int) m);
 847         texture = (rtexture_t **)(m->lump_shaders.start + (int) m);
 848
 849         aliasmeshinfo.vertex = aliasvert;
 850         aliasmeshinfo.vertexstep = sizeof(float[3]);
 851         aliasmeshinfo.color = aliasvertcolor;
 852         aliasmeshinfo.colorstep = sizeof(float[4]);
 853         aliasmeshinfo.texcoords[0] = (float *)(m->lump_texcoords.start + (int) m);
 854         aliasmeshinfo.texcoordstep[0] = sizeof(float[2]);
 855
 856         for (i = 0;i < m->numshaders;i++)
 857         {
 858                 aliasmeshinfo.tex[0] = R_GetTexture(*texture);
 859                 aliasmeshinfo.tex[1] = 0;
 860                 if (currentrenderentity->effects & EF_ADDITIVE)
 861                 {
 862                         aliasmeshinfo.transparent = true;
 863                         aliasmeshinfo.blendfunc1 = GL_SRC_ALPHA;
 864                         aliasmeshinfo.blendfunc2 = GL_ONE;
 865                 }
 866                 else if (currentrenderentity->alpha != 1.0 || R_TextureHasAlpha(*texture))
 867                 {
 868                         aliasmeshinfo.transparent = true;
 869                         aliasmeshinfo.blendfunc1 = GL_SRC_ALPHA;
 870                         aliasmeshinfo.blendfunc2 = GL_ONE_MINUS_SRC_ALPHA;
 871                 }
 872                 else
 873                 {
 874                         aliasmeshinfo.transparent = false;
 875                         aliasmeshinfo.blendfunc1 = GL_ONE;
 876                         aliasmeshinfo.blendfunc2 = GL_ZERO;
 877                 }
 878                 aliasmeshinfo.numtriangles = *renderlist++;
 879                 aliasmeshinfo.index = renderlist;
 880                 R_Mesh_Draw(&aliasmeshinfo);
 881                 renderlist += aliasmeshinfo.numtriangles * 3;
 882         }
 883 }
 884
 885 void GL_DrawZymoticModelMeshFog(vec3_t org, zymtype1header_t *m)
 886 {
 887         int i, *renderlist;
 888         vec3_t diff;
 889
 890         // FIXME: do better fog
 891         renderlist = (int *)(m->lump_render.start + (int) m);
 892
 893         aliasmeshinfo.tex[0] = 0;
 894         aliasmeshinfo.blendfunc1 = GL_SRC_ALPHA;
 895         aliasmeshinfo.blendfunc2 = GL_ONE_MINUS_SRC_ALPHA;
 896
 897         VectorSubtract(org, r_origin, diff);
 898         aliasmeshinfo.cr = fogcolor[0];
 899         aliasmeshinfo.cg = fogcolor[1];
 900         aliasmeshinfo.cb = fogcolor[2];
 901         aliasmeshinfo.ca = currentrenderentity->alpha * exp(fogdensity/DotProduct(diff,diff));
 902
 903         for (i = 0;i < m->numshaders;i++)
 904         {
 905                 aliasmeshinfo.numtriangles = *renderlist++;
 906                 aliasmeshinfo.index = renderlist;
 907                 R_Mesh_Draw(&aliasmeshinfo);
 908                 renderlist += aliasmeshinfo.numtriangles * 3;
 909         }
 910 }
 911
 912 void R_DrawZymoticModel (void)
 913 {
 914         zymtype1header_t *m;
 915
 916         // FIXME: do better fog
 917         m = currentrenderentity->model->zymdata_header;
 918         ZymoticLerpBones(m->numbones, (zymbonematrix *)(m->lump_poses.start + (int) m), currentrenderentity->frameblend, (zymbone_t *)(m->lump_bones.start + (int) m), currentrenderentity->origin, currentrenderentity->angles, currentrenderentity->scale);
 919         ZymoticTransformVerts(m->numverts, (int *)(m->lump_vertbonecounts.start + (int) m), (zymvertex_t *)(m->lump_verts.start + (int) m));
 920         ZymoticCalcNormals(m->numverts, m->numshaders, (int *)(m->lump_render.start + (int) m));
 921
 922         R_LightModel(m->numverts);
 923
 924         memset(&aliasmeshinfo, 0, sizeof(aliasmeshinfo));
 925         aliasmeshinfo.numverts = m->numverts;
 926
 927         GL_DrawZymoticModelMesh(m);
 928
 929         if (fogenabled)
 930                 GL_DrawZymoticModelMeshFog(currentrenderentity->origin, m);
 931 }
 932
 933 void R_DrawAliasModel (void)
 934 {
 935         if (currentrenderentity->alpha < (1.0f / 64.0f))
 936                 return; // basically completely transparent
 937
 938         c_models++;
 939
 940         c_alias_polys += currentrenderentity->model->numtris;
 941         if (currentrenderentity->model->aliastype == ALIASTYPE_ZYM)
 942                 R_DrawZymoticModel ();
 943         else if (currentrenderentity->model->aliastype == ALIASTYPE_MD2)
 944                 R_DrawQ2AliasModel ();
 945         else
 946                 R_DrawQ1AliasModel   ();
 947 }