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];
16 static matrix4x4_t skymatrix;
17 static matrix4x4_t skyinversematrix;
19 typedef struct suffixinfo_s
22 qboolean flipx, flipy, flipdiagonal;
25 static const suffixinfo_t suffix[3][6] =
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}
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}
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}
53 static rtexture_t *skyboxside[6];
55 void R_SkyStartFrame(void)
57 skyrendersphere = 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 && !(r_refdef.fogenabled && r_refdef.fogmasktable[FOGMASKTABLEWIDTH-1] < (1.0f / 256.0f)))
64 if (skyboxside[0] || skyboxside[1] || skyboxside[2] || skyboxside[3] || skyboxside[4] || skyboxside[5])
66 else if (r_refdef.scene.worldmodel && r_refdef.scene.worldmodel->brush.solidskytexture)
67 skyrendersphere = true;
68 skyrendermasked = true;
77 void R_UnloadSkyBox(void)
85 R_FreeTexture(skyboxside[i]);
90 if (c && developer_loading.integer)
91 Con_Printf("unloading skybox\n");
94 int R_LoadSkyBox(void)
97 int indices[4] = {0,1,2,3};
98 char name[MAX_INPUTLINE];
99 unsigned char *image_buffer;
112 if (dpsnprintf(name, sizeof(name), "%s_%s", skyname, suffix[j][i].suffix) < 0 || !(image_buffer = loadimagepixelsbgra(name, false, false)))
114 if (dpsnprintf(name, sizeof(name), "%s%s", skyname, suffix[j][i].suffix) < 0 || !(image_buffer = loadimagepixelsbgra(name, false, false)))
116 if (dpsnprintf(name, sizeof(name), "env/%s%s", skyname, suffix[j][i].suffix) < 0 || !(image_buffer = loadimagepixelsbgra(name, false, false)))
118 if (dpsnprintf(name, sizeof(name), "gfx/env/%s%s", skyname, suffix[j][i].suffix) < 0 || !(image_buffer = loadimagepixelsbgra(name, false, false)))
123 temp = (unsigned char *)Mem_Alloc(tempmempool, image_width*image_height*4);
124 Image_CopyMux (temp, image_buffer, image_width, image_height, suffix[j][i].flipx, suffix[j][i].flipy, suffix[j][i].flipdiagonal, 4, 4, indices);
125 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);
126 Mem_Free(image_buffer);
138 if (developer_loading.integer)
139 Con_Printf("loading skybox \"%s\"\n", name);
144 int R_SetSkyBox(const char *sky)
146 if (strcmp(sky, skyname) == 0) // no change
149 if (strlen(sky) > 1000)
151 Con_Printf("sky name too long (%i, max is 1000)\n", (int)strlen(sky));
155 strlcpy(skyname, sky, sizeof(skyname));
157 return R_LoadSkyBox();
160 // LordHavoc: added LoadSky console command
161 void LoadSky_f (void)
167 Con_Printf("current sky: %s\n", skyname);
169 Con_Print("no skybox has been set\n");
172 if (R_SetSkyBox(Cmd_Argv(1)))
175 Con_Printf("skybox set to %s\n", skyname);
177 Con_Print("skybox disabled\n");
180 Con_Printf("failed to load skybox %s\n", Cmd_Argv(1));
183 Con_Print("usage: loadsky skyname\n");
188 static const float skyboxvertex3f[6*4*3] =
222 static const float skyboxtexcoord2f[6*4*2] =
256 static const unsigned short skyboxelements[6*2*3] =
278 static void R_SkyBox(void)
281 // FIXME: fixed function path can't properly handle r_refdef.view.colorscale > 1
282 GL_Color(1 * r_refdef.view.colorscale, 1 * r_refdef.view.colorscale, 1 * r_refdef.view.colorscale, 1);
283 GL_BlendFunc(GL_ONE, GL_ZERO);
284 GL_CullFace(GL_NONE);
287 GL_PolygonOffset(0, 0);
288 GL_DepthTest(false); // don't modify or read zbuffer
289 R_Mesh_VertexPointer(skyboxvertex3f, 0, 0);
290 R_Mesh_ColorPointer(NULL, 0, 0);
291 R_Mesh_ResetTextureState();
292 R_Mesh_TexCoordPointer(0, 2, skyboxtexcoord2f, 0, 0);
293 R_SetupGenericShader(true);
294 GL_LockArrays(0, 6*4);
295 for (i = 0;i < 6;i++)
297 R_Mesh_TexBind(0, R_GetTexture(skyboxside[i]));
298 R_Mesh_Draw(0, 6*4, i*2, 2, NULL, skyboxelements, 0, 0);
301 if(r_refdef.fogenabled)
303 R_SetupGenericShader(false);
304 GL_BlendFunc(GL_SRC_ALPHA, GL_ONE_MINUS_SRC_ALPHA);
305 GL_Color(r_refdef.fogcolor[0], r_refdef.fogcolor[1], r_refdef.fogcolor[2], 1 - r_refdef.fogmasktable[FOGMASKTABLEWIDTH-1]);
306 for (i = 0;i < 6;i++)
308 R_Mesh_TexBind(0, 0);
309 R_Mesh_Draw(0, 6*4, i*2, 2, NULL, skyboxelements, 0, 0);
317 #define skygridx1 (skygridx + 1)
318 #define skygridxrecip (1.0f / (skygridx))
320 #define skygridy1 (skygridy + 1)
321 #define skygridyrecip (1.0f / (skygridy))
322 #define skysphere_numverts (skygridx1 * skygridy1)
323 #define skysphere_numtriangles (skygridx * skygridy * 2)
324 static float skysphere_vertex3f[skysphere_numverts * 3];
325 static float skysphere_texcoord2f[skysphere_numverts * 2];
326 static unsigned short skysphere_elements[skysphere_numtriangles * 3];
328 static void skyspherecalc(void)
332 float a, b, x, ax, ay, v[3], length, *vertex3f, *texcoord2f;
337 vertex3f = skysphere_vertex3f;
338 texcoord2f = skysphere_texcoord2f;
339 for (j = 0;j <= skygridy;j++)
341 a = j * skygridyrecip;
342 ax = cos(a * M_PI * 2);
343 ay = -sin(a * M_PI * 2);
344 for (i = 0;i <= skygridx;i++)
346 b = i * skygridxrecip;
347 x = cos((b + 0.5) * M_PI);
350 v[2] = -sin((b + 0.5) * M_PI) * dz;
351 length = 3.0f / sqrt(v[0]*v[0]+v[1]*v[1]+(v[2]*v[2]*9));
352 *texcoord2f++ = v[0] * length;
353 *texcoord2f++ = v[1] * length;
359 e = skysphere_elements;
360 for (j = 0;j < skygridy;j++)
362 for (i = 0;i < skygridx;i++)
364 *e++ = j * skygridx1 + i;
365 *e++ = j * skygridx1 + i + 1;
366 *e++ = (j + 1) * skygridx1 + i;
368 *e++ = j * skygridx1 + i + 1;
369 *e++ = (j + 1) * skygridx1 + i + 1;
370 *e++ = (j + 1) * skygridx1 + i;
375 static void R_SkySphere(void)
378 static qboolean skysphereinitialized = false;
379 matrix4x4_t scroll1matrix, scroll2matrix;
380 if (!skysphereinitialized)
382 skysphereinitialized = true;
386 // wrap the scroll values just to be extra kind to float accuracy
388 // scroll speed for upper layer
389 speedscale = r_refdef.scene.time*r_skyscroll1.value*8.0/128.0;
390 speedscale -= floor(speedscale);
391 Matrix4x4_CreateTranslate(&scroll1matrix, speedscale, speedscale, 0);
392 // scroll speed for lower layer (transparent layer)
393 speedscale = r_refdef.scene.time*r_skyscroll2.value*8.0/128.0;
394 speedscale -= floor(speedscale);
395 Matrix4x4_CreateTranslate(&scroll2matrix, speedscale, speedscale, 0);
397 // FIXME: fixed function path can't properly handle r_refdef.view.colorscale > 1
398 GL_Color(1 * r_refdef.view.colorscale, 1 * r_refdef.view.colorscale, 1 * r_refdef.view.colorscale, 1);
399 GL_BlendFunc(GL_ONE, GL_ZERO);
400 GL_CullFace(GL_NONE);
403 GL_PolygonOffset(0, 0);
404 GL_DepthTest(false); // don't modify or read zbuffer
405 R_Mesh_VertexPointer(skysphere_vertex3f, 0, 0);
406 R_Mesh_ColorPointer(NULL, 0, 0);
407 R_Mesh_ResetTextureState();
408 R_Mesh_TexBind(0, R_GetTexture(r_refdef.scene.worldmodel->brush.solidskytexture));
409 R_Mesh_TexCoordPointer(0, 2, skysphere_texcoord2f, 0, 0);
410 R_Mesh_TexMatrix(0, &scroll1matrix);
411 if (r_textureunits.integer >= 2 && r_refdef.view.colorscale == 1)
413 // one pass using GL_DECAL or GL_INTERPOLATE_ARB for alpha layer
414 R_SetupGenericTwoTextureShader(GL_DECAL);
415 R_Mesh_TexBind(1, R_GetTexture(r_refdef.scene.worldmodel->brush.alphaskytexture));
416 R_Mesh_TexCoordPointer(1, 2, skysphere_texcoord2f, 0, 0);
417 R_Mesh_TexMatrix(1, &scroll2matrix);
418 GL_LockArrays(0, skysphere_numverts);
419 R_Mesh_Draw(0, skysphere_numverts, 0, skysphere_numtriangles, NULL, skysphere_elements, 0, 0);
421 R_Mesh_TexBind(1, 0);
426 R_SetupGenericShader(true);
427 GL_LockArrays(0, skysphere_numverts);
428 R_Mesh_Draw(0, skysphere_numverts, 0, skysphere_numtriangles, NULL, skysphere_elements, 0, 0);
430 GL_BlendFunc(GL_SRC_ALPHA, GL_ONE_MINUS_SRC_ALPHA);
431 R_Mesh_TexBind(0, R_GetTexture(r_refdef.scene.worldmodel->brush.alphaskytexture));
432 R_Mesh_TexMatrix(0, &scroll2matrix);
433 GL_LockArrays(0, skysphere_numverts);
434 R_Mesh_Draw(0, skysphere_numverts, 0, skysphere_numtriangles, NULL, skysphere_elements, 0, 0);
438 if(r_refdef.fogenabled)
440 R_SetupGenericShader(false);
441 R_Mesh_TexBind(0, 0);
442 GL_BlendFunc(GL_SRC_ALPHA, GL_ONE_MINUS_SRC_ALPHA);
443 GL_Color(r_refdef.fogcolor[0], r_refdef.fogcolor[1], r_refdef.fogcolor[2], 1 - r_refdef.fogmasktable[FOGMASKTABLEWIDTH-1]);
444 GL_LockArrays(0, skysphere_numverts);
445 R_Mesh_Draw(0, skysphere_numverts, 0, skysphere_numtriangles, NULL, skysphere_elements, 0, 0);
452 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));
453 Matrix4x4_Invert_Simple(&skyinversematrix, &skymatrix);
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);
480 //===============================================================
482 void R_ResetSkyBox(void)
489 static void r_sky_start(void)
491 skytexturepool = R_AllocTexturePool();
495 static void r_sky_shutdown(void)
498 R_FreeTexturePool(&skytexturepool);
501 static void r_sky_newmap(void)
506 void R_Sky_Init(void)
508 Cmd_AddCommand ("loadsky", &LoadSky_f, "load a skybox by basename (for example loadsky mtnsun_ loads mtnsun_ft.tga and so on)");
509 Cvar_RegisterVariable (&r_sky);
510 Cvar_RegisterVariable (&r_skyscroll1);
511 Cvar_RegisterVariable (&r_skyscroll2);
512 memset(&skyboxside, 0, sizeof(skyboxside));
514 R_RegisterModule("R_Sky", r_sky_start, r_sky_shutdown, r_sky_newmap);