r_sky.c

   1
   2 #include "quakedef.h"
   3 #include "image.h"
   4
   5 // FIXME: fix skybox after vid_restart
   6 cvar_t r_sky = {CVAR_SAVE, "r_sky", "1", "enables sky rendering (black otherwise)"};
   7 cvar_t r_skyscroll1 = {CVAR_SAVE, "r_skyscroll1", "1", "speed at which upper clouds layer scrolls in quake sky"};
   8 cvar_t r_skyscroll2 = {CVAR_SAVE, "r_skyscroll2", "2", "speed at which lower clouds layer scrolls in quake sky"};
   9 int skyrenderlater;
  10 int skyrendermasked;
  11
  12 static int skyrendersphere;
  13 static int skyrenderbox;
  14 static rtexturepool_t *skytexturepool;
  15 static char skyname[MAX_QPATH];
  16 static matrix4x4_t skymatrix;
  17 static matrix4x4_t skyinversematrix;
  18
  19 typedef struct suffixinfo_s
  20 {
  21         const char *suffix;
  22         qboolean flipx, flipy, flipdiagonal;
  23 }
  24 suffixinfo_t;
  25 static const suffixinfo_t suffix[3][6] =
  26 {
  27         {
  28                 {"px",   false, false, false},
  29                 {"nx",   false, false, false},
  30                 {"py",   false, false, false},
  31                 {"ny",   false, false, false},
  32                 {"pz",   false, false, false},
  33                 {"nz",   false, false, false}
  34         },
  35         {
  36                 {"posx", false, false, false},
  37                 {"negx", false, false, false},
  38                 {"posy", false, false, false},
  39                 {"negy", false, false, false},
  40                 {"posz", false, false, false},
  41                 {"negz", false, false, false}
  42         },
  43         {
  44                 {"rt",   false, false,  true},
  45                 {"lf",    true,  true,  true},
  46                 {"bk",   false,  true, false},
  47                 {"ft",    true, false, false},
  48                 {"up",   false, false,  true},
  49                 {"dn",   false, false,  true}
  50         }
  51 };
  52
  53 static skinframe_t *skyboxskinframe[6];
  54
  55 void R_SkyStartFrame(void)
  56 {
  57         skyrendersphere = false;
  58         skyrenderbox = false;
  59         skyrendermasked = false;
  60         // for depth-masked sky, we need to know whether any sky was rendered
  61         skyrenderlater = false;
  62         if (r_sky.integer)
  63         {
  64                 if (skyboxskinframe[0] || skyboxskinframe[1] || skyboxskinframe[2] || skyboxskinframe[3] || skyboxskinframe[4] || skyboxskinframe[5])
  65                         skyrenderbox = true;
  66                 else if (r_refdef.scene.worldmodel && r_refdef.scene.worldmodel->brush.solidskyskinframe)
  67                         skyrendersphere = true;
  68                 skyrendermasked = true;
  69         }
  70 }
  71
  72 /*
  73 ==================
  74 R_SetSkyBox
  75 ==================
  76 */
  77 static void R_UnloadSkyBox(void)
  78 {
  79         int i;
  80         int c = 0;
  81         for (i = 0;i < 6;i++)
  82         {
  83                 if (skyboxskinframe[i])
  84                 {
  85                         // TODO: make a R_SkinFrame_Purge for single skins...
  86                         c++;
  87                 }
  88                 skyboxskinframe[i] = NULL;
  89         }
  90         if (c && developer_loading.integer)
  91                 Con_Printf("unloading skybox\n");
  92 }
  93
  94 static int R_LoadSkyBox(void)
  95 {
  96         int i, j, success;
  97         int indices[4] = {0,1,2,3};
  98         char name[MAX_INPUTLINE];
  99         unsigned char *image_buffer;
 100         unsigned char *temp;
 101         char vabuf[1024];
 102
 103         R_UnloadSkyBox();
 104
 105         if (!skyname[0])
 106                 return true;
 107
 108         for (j=0; j<3; j++)
 109         {
 110                 success = 0;
 111                 for (i=0; i<6; i++)
 112                 {
 113                         if (dpsnprintf(name, sizeof(name), "%s_%s", skyname, suffix[j][i].suffix) < 0 || !(image_buffer = loadimagepixelsbgra(name, false, false, false, NULL)))
 114                         {
 115                                 if (dpsnprintf(name, sizeof(name), "%s%s", skyname, suffix[j][i].suffix) < 0 || !(image_buffer = loadimagepixelsbgra(name, false, false, false, NULL)))
 116                                 {
 117                                         if (dpsnprintf(name, sizeof(name), "env/%s%s", skyname, suffix[j][i].suffix) < 0 || !(image_buffer = loadimagepixelsbgra(name, false, false, false, NULL)))
 118                                         {
 119                                                 if (dpsnprintf(name, sizeof(name), "gfx/env/%s%s", skyname, suffix[j][i].suffix) < 0 || !(image_buffer = loadimagepixelsbgra(name, false, false, false, NULL)))
 120                                                         continue;
 121                                         }
 122                                 }
 123                         }
 124                         temp = (unsigned char *)Mem_Alloc(tempmempool, image_width*image_height*4);
 125                         Image_CopyMux (temp, image_buffer, image_width, image_height, suffix[j][i].flipx, suffix[j][i].flipy, suffix[j][i].flipdiagonal, 4, 4, indices);
 126                         skyboxskinframe[i] = R_SkinFrame_LoadInternalBGRA(va(vabuf, sizeof(vabuf), "skyboxside%d", i), TEXF_CLAMP | (gl_texturecompression_sky.integer ? TEXF_COMPRESS : 0), temp, image_width, image_height, vid.sRGB3D);
 127                         Mem_Free(image_buffer);
 128                         Mem_Free(temp);
 129                         success++;
 130                 }
 131
 132                 if (success)
 133                         break;
 134         }
 135
 136         if (j == 3)
 137                 return false;
 138
 139         if (developer_loading.integer)
 140                 Con_Printf("loading skybox \"%s\"\n", name);
 141
 142         return true;
 143 }
 144
 145 int R_SetSkyBox(const char *sky)
 146 {
 147         if (strcmp(sky, skyname) == 0) // no change
 148                 return true;
 149
 150         if (strlen(sky) > 1000)
 151         {
 152                 Con_Printf("sky name too long (%i, max is 1000)\n", (int)strlen(sky));
 153                 return false;
 154         }
 155
 156         strlcpy(skyname, sky, sizeof(skyname));
 157
 158         return R_LoadSkyBox();
 159 }
 160
 161 // LordHavoc: added LoadSky console command
 162 static void LoadSky_f (void)
 163 {
 164         switch (Cmd_Argc())
 165         {
 166         case 1:
 167                 if (skyname[0])
 168                         Con_Printf("current sky: %s\n", skyname);
 169                 else
 170                         Con_Print("no skybox has been set\n");
 171                 break;
 172         case 2:
 173                 if (R_SetSkyBox(Cmd_Argv(1)))
 174                 {
 175                         if (skyname[0])
 176                                 Con_Printf("skybox set to %s\n", skyname);
 177                         else
 178                                 Con_Print("skybox disabled\n");
 179                 }
 180                 else
 181                         Con_Printf("failed to load skybox %s\n", Cmd_Argv(1));
 182                 break;
 183         default:
 184                 Con_Print("usage: loadsky skyname\n");
 185                 break;
 186         }
 187 }
 188
 189 static const float skyboxvertex3f[6*4*3] =
 190 {
 191         // skyside[0]
 192          16, -16,  16,
 193          16, -16, -16,
 194          16,  16, -16,
 195          16,  16,  16,
 196         // skyside[1]
 197         -16,  16,  16,
 198         -16,  16, -16,
 199         -16, -16, -16,
 200         -16, -16,  16,
 201         // skyside[2]
 202          16,  16,  16,
 203          16,  16, -16,
 204         -16,  16, -16,
 205         -16,  16,  16,
 206         // skyside[3]
 207         -16, -16,  16,
 208         -16, -16, -16,
 209          16, -16, -16,
 210          16, -16,  16,
 211         // skyside[4]
 212         -16, -16,  16,
 213          16, -16,  16,
 214          16,  16,  16,
 215         -16,  16,  16,
 216         // skyside[5]
 217          16, -16, -16,
 218         -16, -16, -16,
 219         -16,  16, -16,
 220          16,  16, -16
 221 };
 222
 223 static const float skyboxtexcoord2f[6*4*2] =
 224 {
 225         // skyside[0]
 226         0, 1,
 227         1, 1,
 228         1, 0,
 229         0, 0,
 230         // skyside[1]
 231         1, 0,
 232         0, 0,
 233         0, 1,
 234         1, 1,
 235         // skyside[2]
 236         1, 1,
 237         1, 0,
 238         0, 0,
 239         0, 1,
 240         // skyside[3]
 241         0, 0,
 242         0, 1,
 243         1, 1,
 244         1, 0,
 245         // skyside[4]
 246         0, 1,
 247         1, 1,
 248         1, 0,
 249         0, 0,
 250         // skyside[5]
 251         0, 1,
 252         1, 1,
 253         1, 0,
 254         0, 0
 255 };
 256
 257 static const int skyboxelement3i[6*2*3] =
 258 {
 259         // skyside[3]
 260          0,  1,  2,
 261          0,  2,  3,
 262         // skyside[1]
 263          4,  5,  6,
 264          4,  6,  7,
 265         // skyside[0]
 266          8,  9, 10,
 267          8, 10, 11,
 268         // skyside[2]
 269         12, 13, 14,
 270         12, 14, 15,
 271         // skyside[4]
 272         16, 17, 18,
 273         16, 18, 19,
 274         // skyside[5]
 275         20, 21, 22,
 276         20, 22, 23
 277 };
 278
 279 static const unsigned short skyboxelement3s[6*2*3] =
 280 {
 281         // skyside[3]
 282          0,  1,  2,
 283          0,  2,  3,
 284         // skyside[1]
 285          4,  5,  6,
 286          4,  6,  7,
 287         // skyside[0]
 288          8,  9, 10,
 289          8, 10, 11,
 290         // skyside[2]
 291         12, 13, 14,
 292         12, 14, 15,
 293         // skyside[4]
 294         16, 17, 18,
 295         16, 18, 19,
 296         // skyside[5]
 297         20, 21, 22,
 298         20, 22, 23
 299 };
 300
 301 static void R_SkyBox(void)
 302 {
 303         int i;
 304         RSurf_ActiveCustomEntity(&skymatrix, &skyinversematrix, 0, 0, 1, 1, 1, 1, 6*4, skyboxvertex3f, skyboxtexcoord2f, NULL, NULL, NULL, NULL, 6*2, skyboxelement3i, skyboxelement3s, false, false);
 305         for (i = 0;i < 6;i++)
 306                 if(skyboxskinframe[i])
 307                         R_DrawCustomSurface(skyboxskinframe[i], &identitymatrix, MATERIALFLAG_SKY | MATERIALFLAG_FULLBRIGHT | MATERIALFLAG_NOCULLFACE | MATERIALFLAG_NODEPTHTEST, i*4, 4, i*2, 2, false, false);
 308 }
 309
 310 #define skygridx 32
 311 #define skygridx1 (skygridx + 1)
 312 #define skygridxrecip (1.0f / (skygridx))
 313 #define skygridy 32
 314 #define skygridy1 (skygridy + 1)
 315 #define skygridyrecip (1.0f / (skygridy))
 316 #define skysphere_numverts (skygridx1 * skygridy1)
 317 #define skysphere_numtriangles (skygridx * skygridy * 2)
 318 static float skysphere_vertex3f[skysphere_numverts * 3];
 319 static float skysphere_texcoord2f[skysphere_numverts * 2];
 320 static int skysphere_element3i[skysphere_numtriangles * 3];
 321 static unsigned short skysphere_element3s[skysphere_numtriangles * 3];
 322
 323 static void skyspherecalc(void)
 324 {
 325         int i, j;
 326         unsigned short *e;
 327         float a, b, x, ax, ay, v[3], length, *vertex3f, *texcoord2f;
 328         float dx, dy, dz;
 329         dx = 16.0f;
 330         dy = 16.0f;
 331         dz = 16.0f / 3.0f;
 332         vertex3f = skysphere_vertex3f;
 333         texcoord2f = skysphere_texcoord2f;
 334         for (j = 0;j <= skygridy;j++)
 335         {
 336                 a = j * skygridyrecip;
 337                 ax = cos(a * M_PI * 2);
 338                 ay = -sin(a * M_PI * 2);
 339                 for (i = 0;i <= skygridx;i++)
 340                 {
 341                         b = i * skygridxrecip;
 342                         x = cos((b + 0.5) * M_PI);
 343                         v[0] = ax*x * dx;
 344                         v[1] = ay*x * dy;
 345                         v[2] = -sin((b + 0.5) * M_PI) * dz;
 346                         length = 3.0f / sqrt(v[0]*v[0]+v[1]*v[1]+(v[2]*v[2]*9));
 347                         *texcoord2f++ = v[0] * length;
 348                         *texcoord2f++ = v[1] * length;
 349                         *vertex3f++ = v[0];
 350                         *vertex3f++ = v[1];
 351                         *vertex3f++ = v[2];
 352                 }
 353         }
 354         e = skysphere_element3s;
 355         for (j = 0;j < skygridy;j++)
 356         {
 357                 for (i = 0;i < skygridx;i++)
 358                 {
 359                         *e++ =  j      * skygridx1 + i;
 360                         *e++ =  j      * skygridx1 + i + 1;
 361                         *e++ = (j + 1) * skygridx1 + i;
 362
 363                         *e++ =  j      * skygridx1 + i + 1;
 364                         *e++ = (j + 1) * skygridx1 + i + 1;
 365                         *e++ = (j + 1) * skygridx1 + i;
 366                 }
 367         }
 368         for (i = 0;i < skysphere_numtriangles*3;i++)
 369                 skysphere_element3i[i] = skysphere_element3s[i];
 370 }
 371
 372 static void R_SkySphere(void)
 373 {
 374         double speedscale;
 375         static qboolean skysphereinitialized = false;
 376         matrix4x4_t scroll1matrix, scroll2matrix;
 377         if (!skysphereinitialized)
 378         {
 379                 skysphereinitialized = true;
 380                 skyspherecalc();
 381         }
 382
 383         // wrap the scroll values just to be extra kind to float accuracy
 384
 385         // scroll speed for upper layer
 386         speedscale = r_refdef.scene.time*r_skyscroll1.value*8.0/128.0;
 387         speedscale -= floor(speedscale);
 388         Matrix4x4_CreateTranslate(&scroll1matrix, speedscale, speedscale, 0);
 389         // scroll speed for lower layer (transparent layer)
 390         speedscale = r_refdef.scene.time*r_skyscroll2.value*8.0/128.0;
 391         speedscale -= floor(speedscale);
 392         Matrix4x4_CreateTranslate(&scroll2matrix, speedscale, speedscale, 0);
 393
 394         RSurf_ActiveCustomEntity(&skymatrix, &skyinversematrix, 0, 0, 1, 1, 1, 1, skysphere_numverts, skysphere_vertex3f, skysphere_texcoord2f, NULL, NULL, NULL, NULL, skysphere_numtriangles, skysphere_element3i, skysphere_element3s, false, false);
 395         R_DrawCustomSurface(r_refdef.scene.worldmodel->brush.solidskyskinframe, &scroll1matrix, MATERIALFLAG_SKY | MATERIALFLAG_FULLBRIGHT | MATERIALFLAG_NOCULLFACE | MATERIALFLAG_NODEPTHTEST                                            , 0, skysphere_numverts, 0, skysphere_numtriangles, false, false);
 396         R_DrawCustomSurface(r_refdef.scene.worldmodel->brush.alphaskyskinframe, &scroll2matrix, MATERIALFLAG_SKY | MATERIALFLAG_FULLBRIGHT | MATERIALFLAG_NOCULLFACE | MATERIALFLAG_NODEPTHTEST | MATERIALFLAG_ALPHA | MATERIALFLAG_BLENDED, 0, skysphere_numverts, 0, skysphere_numtriangles, false, false);
 397 }
 398
 399 void R_Sky(void)
 400 {
 401         Matrix4x4_CreateFromQuakeEntity(&skymatrix, r_refdef.view.origin[0], r_refdef.view.origin[1], r_refdef.view.origin[2], 0, 0, 0, r_refdef.farclip * (0.5f / 16.0f));
 402         Matrix4x4_Invert_Simple(&skyinversematrix, &skymatrix);
 403
 404         if (skyrendersphere)
 405         {
 406                 // this does not modify depth buffer
 407                 R_SkySphere();
 408         }
 409         else if (skyrenderbox)
 410         {
 411                 // this does not modify depth buffer
 412                 R_SkyBox();
 413         }
 414         /* this will be skyroom someday
 415         else
 416         {
 417                 // this modifies the depth buffer so we have to clear it afterward
 418                 //R_SkyRoom();
 419                 // clear the depthbuffer that was used while rendering the skyroom
 420                 //GL_Clear(GL_DEPTH_BUFFER_BIT);
 421         }
 422         */
 423 }
 424
 425 //===============================================================
 426
 427 void R_ResetSkyBox(void)
 428 {
 429         R_UnloadSkyBox();
 430         skyname[0] = 0;
 431         R_LoadSkyBox();
 432 }
 433
 434 static void r_sky_start(void)
 435 {
 436         skytexturepool = R_AllocTexturePool();
 437         R_LoadSkyBox();
 438 }
 439
 440 static void r_sky_shutdown(void)
 441 {
 442         R_UnloadSkyBox();
 443         R_FreeTexturePool(&skytexturepool);
 444 }
 445
 446 static void r_sky_newmap(void)
 447 {
 448 }
 449
 450
 451 void R_Sky_Init(void)
 452 {
 453         Cmd_AddCommand ("loadsky", &LoadSky_f, "load a skybox by basename (for example loadsky mtnsun_ loads mtnsun_ft.tga and so on)");
 454         Cvar_RegisterVariable (&r_sky);
 455         Cvar_RegisterVariable (&r_skyscroll1);
 456         Cvar_RegisterVariable (&r_skyscroll2);
 457         memset(&skyboxskinframe, 0, sizeof(skyboxskinframe));
 458         skyname[0] = 0;
 459         R_RegisterModule("R_Sky", r_sky_start, r_sky_shutdown, r_sky_newmap, NULL, NULL);
 460 }
 461