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"};
12 static int skyrendersphere;
13 static int skyrenderbox;
14 static rtexturepool_t *skytexturepool;
15 static char skyname[MAX_QPATH];
17 typedef struct suffixinfo_s
20 qboolean flipx, flipy, flipdiagonal;
23 static const suffixinfo_t suffix[3][6] =
26 {"px", false, false, false},
27 {"nx", false, false, false},
28 {"py", false, false, false},
29 {"ny", false, false, false},
30 {"pz", false, false, false},
31 {"nz", false, false, false}
34 {"posx", false, false, false},
35 {"negx", false, false, false},
36 {"posy", false, false, false},
37 {"negy", false, false, false},
38 {"posz", false, false, false},
39 {"negz", false, false, false}
42 {"rt", false, false, true},
43 {"lf", true, true, true},
44 {"bk", false, true, false},
45 {"ft", true, false, false},
46 {"up", false, false, true},
47 {"dn", false, false, true}
51 static rtexture_t *skyboxside[6];
53 void R_SkyStartFrame(void)
56 skyrendersphere = false;
58 skyrendermasked = false;
59 if (r_sky.integer && !(r_refdef.fogenabled && r_refdef.fogmasktable[FOGMASKTABLEWIDTH-1] < (1.0f / 256.0f)))
61 if (skyboxside[0] || skyboxside[1] || skyboxside[2] || skyboxside[3] || skyboxside[4] || skyboxside[5])
63 else if (r_refdef.scene.worldmodel && r_refdef.scene.worldmodel->brush.solidskytexture)
64 skyrendersphere = true;
65 // for depth-masked sky, render the sky on the first sky surface encountered
67 skyrendermasked = true;
76 void R_UnloadSkyBox(void)
84 R_FreeTexture(skyboxside[i]);
89 if (c && developer_loading.integer)
90 Con_Printf("unloading skybox\n");
93 int R_LoadSkyBox(void)
96 int indices[4] = {0,1,2,3};
97 char name[MAX_INPUTLINE];
98 unsigned char *image_buffer;
111 if (dpsnprintf(name, sizeof(name), "%s_%s", skyname, suffix[j][i].suffix) < 0 || !(image_buffer = loadimagepixelsbgra(name, false, false)))
113 if (dpsnprintf(name, sizeof(name), "%s%s", skyname, suffix[j][i].suffix) < 0 || !(image_buffer = loadimagepixelsbgra(name, false, false)))
115 if (dpsnprintf(name, sizeof(name), "env/%s%s", skyname, suffix[j][i].suffix) < 0 || !(image_buffer = loadimagepixelsbgra(name, false, false)))
117 if (dpsnprintf(name, sizeof(name), "gfx/env/%s%s", skyname, suffix[j][i].suffix) < 0 || !(image_buffer = loadimagepixelsbgra(name, false, false)))
122 temp = (unsigned char *)Mem_Alloc(tempmempool, image_width*image_height*4);
123 Image_CopyMux (temp, image_buffer, image_width, image_height, suffix[j][i].flipx, suffix[j][i].flipy, suffix[j][i].flipdiagonal, 4, 4, indices);
124 skyboxside[i] = R_LoadTexture2D(skytexturepool, va("skyboxside%d", i), image_width, image_height, temp, TEXTYPE_BGRA, TEXF_CLAMP | TEXF_PRECACHE | (gl_texturecompression_sky.integer ? TEXF_COMPRESS : 0), NULL);
125 Mem_Free(image_buffer);
137 if (developer_loading.integer)
138 Con_Printf("loading skybox \"%s\"\n", name);
143 int R_SetSkyBox(const char *sky)
145 if (strcmp(sky, skyname) == 0) // no change
148 if (strlen(sky) > 1000)
150 Con_Printf("sky name too long (%i, max is 1000)\n", (int)strlen(sky));
154 strlcpy(skyname, sky, sizeof(skyname));
156 return R_LoadSkyBox();
159 // LordHavoc: added LoadSky console command
160 void LoadSky_f (void)
166 Con_Printf("current sky: %s\n", skyname);
168 Con_Print("no skybox has been set\n");
171 if (R_SetSkyBox(Cmd_Argv(1)))
174 Con_Printf("skybox set to %s\n", skyname);
176 Con_Print("skybox disabled\n");
179 Con_Printf("failed to load skybox %s\n", Cmd_Argv(1));
182 Con_Print("usage: loadsky skyname\n");
187 static const float skyboxvertex3f[6*4*3] =
221 static const float skyboxtexcoord2f[6*4*2] =
255 static const unsigned short skyboxelements[6*2*3] =
277 static void R_SkyBox(void)
280 // FIXME: fixed function path can't properly handle r_refdef.view.colorscale > 1
281 GL_Color(1 * r_refdef.view.colorscale, 1 * r_refdef.view.colorscale, 1 * r_refdef.view.colorscale, 1);
282 GL_BlendFunc(GL_ONE, GL_ZERO);
283 GL_CullFace(GL_NONE);
286 GL_PolygonOffset(0, 0);
287 GL_DepthTest(false); // don't modify or read zbuffer
288 R_Mesh_VertexPointer(skyboxvertex3f, 0, 0);
289 R_Mesh_ColorPointer(NULL, 0, 0);
290 R_Mesh_ResetTextureState();
291 R_Mesh_TexCoordPointer(0, 2, skyboxtexcoord2f, 0, 0);
292 R_SetupGenericShader(true);
293 GL_LockArrays(0, 6*4);
294 for (i = 0;i < 6;i++)
296 R_Mesh_TexBind(0, R_GetTexture(skyboxside[i]));
297 R_Mesh_Draw(0, 6*4, i*2, 2, NULL, skyboxelements, 0, 0);
300 if(r_refdef.fogenabled)
302 R_SetupGenericShader(false);
303 GL_BlendFunc(GL_SRC_ALPHA, GL_ONE_MINUS_SRC_ALPHA);
304 GL_Color(r_refdef.fogcolor[0], r_refdef.fogcolor[1], r_refdef.fogcolor[2], 1 - r_refdef.fogmasktable[FOGMASKTABLEWIDTH-1]);
305 for (i = 0;i < 6;i++)
307 R_Mesh_TexBind(0, 0);
308 R_Mesh_Draw(0, 6*4, i*2, 2, NULL, skyboxelements, 0, 0);
316 #define skygridx1 (skygridx + 1)
317 #define skygridxrecip (1.0f / (skygridx))
319 #define skygridy1 (skygridy + 1)
320 #define skygridyrecip (1.0f / (skygridy))
321 #define skysphere_numverts (skygridx1 * skygridy1)
322 #define skysphere_numtriangles (skygridx * skygridy * 2)
323 static float skysphere_vertex3f[skysphere_numverts * 3];
324 static float skysphere_texcoord2f[skysphere_numverts * 2];
325 static unsigned short skysphere_elements[skysphere_numtriangles * 3];
327 static void skyspherecalc(void)
331 float a, b, x, ax, ay, v[3], length, *vertex3f, *texcoord2f;
336 vertex3f = skysphere_vertex3f;
337 texcoord2f = skysphere_texcoord2f;
338 for (j = 0;j <= skygridy;j++)
340 a = j * skygridyrecip;
341 ax = cos(a * M_PI * 2);
342 ay = -sin(a * M_PI * 2);
343 for (i = 0;i <= skygridx;i++)
345 b = i * skygridxrecip;
346 x = cos((b + 0.5) * M_PI);
349 v[2] = -sin((b + 0.5) * M_PI) * dz;
350 length = 3.0f / sqrt(v[0]*v[0]+v[1]*v[1]+(v[2]*v[2]*9));
351 *texcoord2f++ = v[0] * length;
352 *texcoord2f++ = v[1] * length;
358 e = skysphere_elements;
359 for (j = 0;j < skygridy;j++)
361 for (i = 0;i < skygridx;i++)
363 *e++ = j * skygridx1 + i;
364 *e++ = j * skygridx1 + i + 1;
365 *e++ = (j + 1) * skygridx1 + i;
367 *e++ = j * skygridx1 + i + 1;
368 *e++ = (j + 1) * skygridx1 + i + 1;
369 *e++ = (j + 1) * skygridx1 + i;
374 static void R_SkySphere(void)
377 static qboolean skysphereinitialized = false;
378 matrix4x4_t scroll1matrix, scroll2matrix;
379 if (!skysphereinitialized)
381 skysphereinitialized = true;
385 // wrap the scroll values just to be extra kind to float accuracy
387 // scroll speed for upper layer
388 speedscale = r_refdef.scene.time*r_skyscroll1.value*8.0/128.0;
389 speedscale -= (int)speedscale;
390 Matrix4x4_CreateTranslate(&scroll1matrix, speedscale, speedscale, 0);
391 // scroll speed for lower layer (transparent layer)
392 speedscale = r_refdef.scene.time*r_skyscroll2.value*8.0/128.0;
393 speedscale -= (int)speedscale;
394 Matrix4x4_CreateTranslate(&scroll2matrix, speedscale, speedscale, 0);
396 // FIXME: fixed function path can't properly handle r_refdef.view.colorscale > 1
397 GL_Color(1 * r_refdef.view.colorscale, 1 * r_refdef.view.colorscale, 1 * r_refdef.view.colorscale, 1);
398 GL_BlendFunc(GL_ONE, GL_ZERO);
399 GL_CullFace(GL_NONE);
402 GL_PolygonOffset(0, 0);
403 GL_DepthTest(false); // don't modify or read zbuffer
404 R_Mesh_VertexPointer(skysphere_vertex3f, 0, 0);
405 R_Mesh_ColorPointer(NULL, 0, 0);
406 R_Mesh_ResetTextureState();
407 R_Mesh_TexBind(0, R_GetTexture(r_refdef.scene.worldmodel->brush.solidskytexture));
408 R_Mesh_TexCoordPointer(0, 2, skysphere_texcoord2f, 0, 0);
409 R_Mesh_TexMatrix(0, &scroll1matrix);
410 if (r_textureunits.integer >= 2 && r_refdef.view.colorscale == 1)
412 // one pass using GL_DECAL or GL_INTERPOLATE_ARB for alpha layer
413 R_SetupGenericTwoTextureShader(GL_DECAL);
414 R_Mesh_TexBind(1, R_GetTexture(r_refdef.scene.worldmodel->brush.alphaskytexture));
415 R_Mesh_TexCoordPointer(1, 2, skysphere_texcoord2f, 0, 0);
416 R_Mesh_TexMatrix(1, &scroll2matrix);
417 GL_LockArrays(0, skysphere_numverts);
418 R_Mesh_Draw(0, skysphere_numverts, 0, skysphere_numtriangles, NULL, skysphere_elements, 0, 0);
420 R_Mesh_TexBind(1, 0);
425 R_SetupGenericShader(true);
426 GL_LockArrays(0, skysphere_numverts);
427 R_Mesh_Draw(0, skysphere_numverts, 0, skysphere_numtriangles, NULL, skysphere_elements, 0, 0);
429 GL_BlendFunc(GL_SRC_ALPHA, GL_ONE_MINUS_SRC_ALPHA);
430 R_Mesh_TexBind(0, R_GetTexture(r_refdef.scene.worldmodel->brush.alphaskytexture));
431 R_Mesh_TexMatrix(0, &scroll2matrix);
432 GL_LockArrays(0, skysphere_numverts);
433 R_Mesh_Draw(0, skysphere_numverts, 0, skysphere_numtriangles, NULL, skysphere_elements, 0, 0);
437 if(r_refdef.fogenabled)
439 R_SetupGenericShader(false);
440 R_Mesh_TexBind(0, 0);
441 GL_BlendFunc(GL_SRC_ALPHA, GL_ONE_MINUS_SRC_ALPHA);
442 GL_Color(r_refdef.fogcolor[0], r_refdef.fogcolor[1], r_refdef.fogcolor[2], 1 - r_refdef.fogmasktable[FOGMASKTABLEWIDTH-1]);
443 GL_LockArrays(0, skysphere_numverts);
444 R_Mesh_Draw(0, skysphere_numverts, 0, skysphere_numtriangles, NULL, skysphere_elements, 0, 0);
451 matrix4x4_t skymatrix;
454 Matrix4x4_CreateTranslate(&skymatrix, r_refdef.view.origin[0], r_refdef.view.origin[1], r_refdef.view.origin[2]);
455 R_Mesh_Matrix(&skymatrix);
458 // this does not modify depth buffer
461 else if (skyrenderbox)
463 // this does not modify depth buffer
466 /* this will be skyroom someday
469 // this modifies the depth buffer so we have to clear it afterward
471 // clear the depthbuffer that was used while rendering the skyroom
472 //GL_Clear(GL_DEPTH_BUFFER_BIT);
481 //===============================================================
483 void R_ResetSkyBox(void)
490 static void r_sky_start(void)
492 skytexturepool = R_AllocTexturePool();
496 static void r_sky_shutdown(void)
499 R_FreeTexturePool(&skytexturepool);
502 static void r_sky_newmap(void)
507 void R_Sky_Init(void)
509 Cmd_AddCommand ("loadsky", &LoadSky_f, "load a skybox by basename (for example loadsky mtnsun_ loads mtnsun_ft.tga and so on)");
510 Cvar_RegisterVariable (&r_sky);
511 Cvar_RegisterVariable (&r_skyscroll1);
512 Cvar_RegisterVariable (&r_skyscroll2);
513 memset(&skyboxside, 0, sizeof(skyboxside));
515 R_RegisterModule("R_Sky", r_sky_start, r_sky_shutdown, r_sky_newmap);