5 // FIXME: fix skybox after vid_restart
6 cvar_t r_sky = {CVAR_SAVE, "r_sky", "1"};
7 cvar_t r_skyscroll1 = {CVAR_SAVE, "r_skyscroll1", "1"};
8 cvar_t r_skyscroll2 = {CVAR_SAVE, "r_skyscroll2", "2"};
12 static int skyrendersphere;
13 static int skyrenderbox;
14 static rtexturepool_t *skytexturepool;
15 static char skyname[256];
17 typedef struct suffixinfo_s
20 qboolean flipx, flipy, flipdiagonal;
23 static 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 && !fogenabled)
61 if (skyboxside[0] || skyboxside[1] || skyboxside[2] || skyboxside[3] || skyboxside[4] || skyboxside[5])
63 else if (r_refdef.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)
82 R_FreeTexture(skyboxside[i]);
87 void R_LoadSkyBox(void)
90 int indices[4] = {0,1,2,3};
105 if (dpsnprintf(name, sizeof(name), "%s_%s", skyname, suffix[j][i].suffix) < 0 || !(image_rgba = loadimagepixels(name, false, 0, 0)))
107 if (dpsnprintf(name, sizeof(name), "%s%s", skyname, suffix[j][i].suffix) < 0 || !(image_rgba = loadimagepixels(name, false, 0, 0)))
109 if (dpsnprintf(name, sizeof(name), "env/%s%s", skyname, suffix[j][i].suffix) < 0 || !(image_rgba = loadimagepixels(name, false, 0, 0)))
111 if (dpsnprintf(name, sizeof(name), "gfx/env/%s%s", skyname, suffix[j][i].suffix) < 0 || !(image_rgba = loadimagepixels(name, false, 0, 0)))
116 temp = Mem_Alloc(tempmempool, image_width*image_height*4);
117 Image_CopyMux (temp, image_rgba, image_width, image_height, suffix[j][i].flipx, suffix[j][i].flipy, suffix[j][i].flipdiagonal, 4, 4, indices);
118 skyboxside[i] = R_LoadTexture2D(skytexturepool, va("skyboxside%d", i), image_width, image_height, temp, TEXTYPE_RGBA, TEXF_CLAMP | TEXF_PRECACHE, NULL);
119 Mem_Free(image_rgba);
129 Con_Printf ("Failed to load %s as skybox\n", skyname);
132 int R_SetSkyBox(const char *sky)
134 if (strcmp(sky, skyname) == 0) // no change
137 if (strlen(sky) > 1000)
139 Con_Printf("sky name too long (%i, max is 1000)\n", strlen(sky));
143 strcpy(skyname, sky);
152 // LordHavoc: added LoadSky console command
153 void LoadSky_f (void)
159 Con_Printf("current sky: %s\n", skyname);
161 Con_Print("no skybox has been set\n");
164 if (R_SetSkyBox(Cmd_Argv(1)))
167 Con_Printf("skybox set to %s\n", skyname);
169 Con_Print("skybox disabled\n");
172 Con_Printf("failed to load skybox %s\n", Cmd_Argv(1));
175 Con_Print("usage: loadsky skyname\n");
180 float skyboxvertex3f[6*4*3] =
214 float skyboxtexcoord2f[6*4*2] =
248 int skyboxelements[6*2*3] =
270 static void R_SkyBox(void)
274 GL_Color(1, 1, 1, 1);
275 memset(&m, 0, sizeof(m));
276 GL_BlendFunc(GL_ONE, GL_ZERO);
278 GL_DepthTest(false); // don't modify or read zbuffer
279 m.pointer_vertex = skyboxvertex3f;
280 m.pointer_texcoord[0] = skyboxtexcoord2f;
281 GL_LockArrays(0, 6*4);
282 for (i = 0;i < 6;i++)
284 m.tex[0] = R_GetTexture(skyboxside[i]);
286 R_Mesh_Draw(0, 6*4, 2, skyboxelements + i * 6);
292 #define skygridx1 (skygridx + 1)
293 #define skygridxrecip (1.0f / (skygridx))
295 #define skygridy1 (skygridy + 1)
296 #define skygridyrecip (1.0f / (skygridy))
297 #define skysphere_numverts (skygridx1 * skygridy1)
298 #define skysphere_numtriangles (skygridx * skygridy * 2)
299 static float skysphere_vertex3f[skysphere_numverts * 3];
300 static float skysphere_texcoord2f[skysphere_numverts * 2];
301 static int skysphere_element3i[skysphere_numtriangles * 3];
303 static void skyspherecalc(void)
306 float a, b, x, ax, ay, v[3], length, *vertex3f, *texcoord2f;
311 vertex3f = skysphere_vertex3f;
312 texcoord2f = skysphere_texcoord2f;
313 for (j = 0;j <= skygridy;j++)
315 a = j * skygridyrecip;
316 ax = cos(a * M_PI * 2);
317 ay = -sin(a * M_PI * 2);
318 for (i = 0;i <= skygridx;i++)
320 b = i * skygridxrecip;
321 x = cos((b + 0.5) * M_PI);
324 v[2] = -sin((b + 0.5) * M_PI) * dz;
325 length = 3.0f / sqrt(v[0]*v[0]+v[1]*v[1]+(v[2]*v[2]*9));
326 *texcoord2f++ = v[0] * length;
327 *texcoord2f++ = v[1] * length;
333 e = skysphere_element3i;
334 for (j = 0;j < skygridy;j++)
336 for (i = 0;i < skygridx;i++)
338 *e++ = j * skygridx1 + i;
339 *e++ = j * skygridx1 + i + 1;
340 *e++ = (j + 1) * skygridx1 + i;
342 *e++ = j * skygridx1 + i + 1;
343 *e++ = (j + 1) * skygridx1 + i + 1;
344 *e++ = (j + 1) * skygridx1 + i;
349 static void R_SkySphere(void)
352 static qboolean skysphereinitialized = false;
354 matrix4x4_t scroll1matrix, scroll2matrix;
355 if (!skysphereinitialized)
357 skysphereinitialized = true;
361 // wrap the scroll values just to be extra kind to float accuracy
363 // scroll speed for upper layer
364 speedscale = r_refdef.time*r_skyscroll1.value*8.0/128.0;
365 speedscale -= (int)speedscale;
366 Matrix4x4_CreateTranslate(&scroll1matrix, speedscale, speedscale, 0);
367 // scroll speed for lower layer (transparent layer)
368 speedscale = r_refdef.time*r_skyscroll2.value*8.0/128.0;
369 speedscale -= (int)speedscale;
370 Matrix4x4_CreateTranslate(&scroll2matrix, speedscale, speedscale, 0);
372 GL_Color(1, 1, 1, 1);
373 GL_BlendFunc(GL_ONE, GL_ZERO);
375 GL_DepthTest(false); // don't modify or read zbuffer
376 memset(&m, 0, sizeof(m));
377 m.pointer_vertex = skysphere_vertex3f;
378 m.tex[0] = R_GetTexture(r_refdef.worldmodel->brush.solidskytexture);
379 m.pointer_texcoord[0] = skysphere_texcoord2f;
380 m.texmatrix[0] = scroll1matrix;
381 if (r_textureunits.integer >= 2)
383 // one pass using GL_DECAL or GL_INTERPOLATE_ARB for alpha layer
384 m.tex[1] = R_GetTexture(r_refdef.worldmodel->brush.alphaskytexture);
385 m.texcombinergb[1] = gl_combine.integer ? GL_INTERPOLATE_ARB : GL_DECAL;
386 m.pointer_texcoord[1] = skysphere_texcoord2f;
387 m.texmatrix[1] = scroll2matrix;
389 GL_LockArrays(0, skysphere_numverts);
390 R_Mesh_Draw(0, skysphere_numverts, skysphere_numtriangles, skysphere_element3i);
397 GL_LockArrays(0, skysphere_numverts);
398 R_Mesh_Draw(0, skysphere_numverts, skysphere_numtriangles, skysphere_element3i);
401 GL_BlendFunc(GL_SRC_ALPHA, GL_ONE_MINUS_SRC_ALPHA);
402 m.tex[0] = R_GetTexture(r_refdef.worldmodel->brush.alphaskytexture);
403 m.texmatrix[0] = scroll2matrix;
405 GL_LockArrays(0, skysphere_numverts);
406 R_Mesh_Draw(0, skysphere_numverts, skysphere_numtriangles, skysphere_element3i);
413 matrix4x4_t skymatrix;
416 Matrix4x4_CreateTranslate(&skymatrix, r_vieworigin[0], r_vieworigin[1], r_vieworigin[2]);
417 R_Mesh_Matrix(&skymatrix);
420 // this does not modify depth buffer
423 else if (skyrenderbox)
425 // this does not modify depth buffer
428 /* this will be skyroom someday
431 // this modifies the depth buffer so we have to clear it afterward
433 // clear the depthbuffer that was used while rendering the skyroom
434 //GL_Clear(GL_DEPTH_BUFFER_BIT);
440 //===============================================================
442 void R_ResetSkyBox(void)
449 static void r_sky_start(void)
451 skytexturepool = R_AllocTexturePool();
455 static void r_sky_shutdown(void)
458 R_FreeTexturePool(&skytexturepool);
461 static void r_sky_newmap(void)
466 void R_Sky_Init(void)
468 Cmd_AddCommand ("loadsky", &LoadSky_f);
469 Cvar_RegisterVariable (&r_sky);
470 Cvar_RegisterVariable (&r_skyscroll1);
471 Cvar_RegisterVariable (&r_skyscroll2);
472 memset(&skyboxside, 0, sizeof(skyboxside));
474 R_RegisterModule("R_Sky", r_sky_start, r_sky_shutdown, r_sky_newmap);