4 cvar_t r_sky = {CVAR_SAVE, "r_sky", "1"};
5 qboolean skyavailable_quake;
6 qboolean skyavailable_box;
10 static rtexture_t *solidskytexture;
11 static rtexture_t *alphaskytexture;
12 static int skyrendersphere;
13 static int skyrenderbox;
14 static rtexturepool_t *skytexturepool;
15 static char skyname[256];
16 static char *suf[6] = {"rt", "bk", "lf", "ft", "up", "dn"};
17 static rtexture_t *skyboxside[6];
19 void R_SkyStartFrame(void)
22 skyrendersphere = false;
24 skyrendermasked = false;
25 if (r_sky.integer && !fogenabled)
29 else if (skyavailable_quake)
30 skyrendersphere = true;
31 // for depth-masked sky, render the sky on the first sky surface encountered
33 skyrendermasked = true;
42 int R_SetSkyBox(const char *sky)
48 if (strcmp(sky, skyname) == 0) // no change
51 skyboxside[0] = skyboxside[1] = skyboxside[2] = skyboxside[3] = skyboxside[4] = skyboxside[5] = NULL;
52 skyavailable_box = false;
58 if (strlen(sky) > 1000)
60 Con_Printf ("sky name too long (%i, max is 1000)\n", strlen(sky));
66 sprintf (name, "env/%s%s", sky, suf[i]);
67 if (!(image_rgba = loadimagepixels(name, false, 0, 0)))
69 sprintf (name, "gfx/env/%s%s", sky, suf[i]);
70 if (!(image_rgba = loadimagepixels(name, false, 0, 0)))
72 Con_Printf ("Couldn't load env/%s%s or gfx/env/%s%s\n", sky, suf[i], sky, suf[i]);
76 skyboxside[i] = R_LoadTexture(skytexturepool, va("skyboxside%d", i), image_width, image_height, image_rgba, TEXTYPE_RGBA, TEXF_PRECACHE);
80 if (skyboxside[0] || skyboxside[1] || skyboxside[2] || skyboxside[3] || skyboxside[4] || skyboxside[5])
82 skyavailable_box = true;
89 // LordHavoc: added LoadSky console command
96 Con_Printf("current sky: %s\n", skyname);
98 Con_Printf("no skybox has been set\n");
101 if (R_SetSkyBox(Cmd_Argv(1)))
104 Con_Printf("skybox set to %s\n", skyname);
106 Con_Printf("skybox disabled\n");
109 Con_Printf("failed to load skybox %s\n", Cmd_Argv(1));
112 Con_Printf("usage: loadsky skyname\n");
117 int skyboxindex[6] = {0, 1, 2, 0, 2, 3};
119 static void R_SkyBox(void)
123 #define R_SkyBoxPolyVec(i,s,t,x,y,z) \
124 varray_vertex[i * 4 + 0] = (x) * 16.0f;\
125 varray_vertex[i * 4 + 1] = (y) * 16.0f;\
126 varray_vertex[i * 4 + 2] = (z) * 16.0f;\
127 varray_texcoord[0][i * 2 + 0] = (s) * (254.0f/256.0f) + (1.0f/256.0f);\
128 varray_texcoord[0][i * 2 + 1] = (t) * (254.0f/256.0f) + (1.0f/256.0f);
130 memset(&m, 0, sizeof(m));
131 m.blendfunc1 = GL_ONE;
132 m.blendfunc2 = GL_ZERO;
133 m.wantoverbright = false;
134 m.depthdisable = true; // don't modify or read zbuffer
135 m.tex[0] = R_GetTexture(skyboxside[3]); // front
138 memcpy(varray_element, skyboxindex, sizeof(int[6]));
139 varray_color[0] = varray_color[4] = varray_color[8] = varray_color[12] = mesh_colorscale;
140 varray_color[1] = varray_color[5] = varray_color[9] = varray_color[13] = mesh_colorscale;
141 varray_color[2] = varray_color[6] = varray_color[10] = varray_color[14] = mesh_colorscale;
142 varray_color[3] = varray_color[7] = varray_color[11] = varray_color[15] = 1;
143 R_SkyBoxPolyVec(0, 1, 0, 1, -1, 1);
144 R_SkyBoxPolyVec(1, 1, 1, 1, -1, -1);
145 R_SkyBoxPolyVec(2, 0, 1, 1, 1, -1);
146 R_SkyBoxPolyVec(3, 0, 0, 1, 1, 1);
148 m.tex[0] = R_GetTexture(skyboxside[1]); // back
150 memcpy(varray_element, skyboxindex, sizeof(int[6]));
151 varray_color[0] = varray_color[4] = varray_color[8] = varray_color[12] = mesh_colorscale;
152 varray_color[1] = varray_color[5] = varray_color[9] = varray_color[13] = mesh_colorscale;
153 varray_color[2] = varray_color[6] = varray_color[10] = varray_color[14] = mesh_colorscale;
154 varray_color[3] = varray_color[7] = varray_color[11] = varray_color[15] = 1;
155 R_SkyBoxPolyVec(0, 1, 0, -1, 1, 1);
156 R_SkyBoxPolyVec(1, 1, 1, -1, 1, -1);
157 R_SkyBoxPolyVec(2, 0, 1, -1, -1, -1);
158 R_SkyBoxPolyVec(3, 0, 0, -1, -1, 1);
160 m.tex[0] = R_GetTexture(skyboxside[0]); // right
162 memcpy(varray_element, skyboxindex, sizeof(int[6]));
163 varray_color[0] = varray_color[4] = varray_color[8] = varray_color[12] = mesh_colorscale;
164 varray_color[1] = varray_color[5] = varray_color[9] = varray_color[13] = mesh_colorscale;
165 varray_color[2] = varray_color[6] = varray_color[10] = varray_color[14] = mesh_colorscale;
166 varray_color[3] = varray_color[7] = varray_color[11] = varray_color[15] = 1;
167 R_SkyBoxPolyVec(0, 1, 0, 1, 1, 1);
168 R_SkyBoxPolyVec(1, 1, 1, 1, 1, -1);
169 R_SkyBoxPolyVec(2, 0, 1, -1, 1, -1);
170 R_SkyBoxPolyVec(3, 0, 0, -1, 1, 1);
172 m.tex[0] = R_GetTexture(skyboxside[2]); // left
174 memcpy(varray_element, skyboxindex, sizeof(int[6]));
175 varray_color[0] = varray_color[4] = varray_color[8] = varray_color[12] = mesh_colorscale;
176 varray_color[1] = varray_color[5] = varray_color[9] = varray_color[13] = mesh_colorscale;
177 varray_color[2] = varray_color[6] = varray_color[10] = varray_color[14] = mesh_colorscale;
178 varray_color[3] = varray_color[7] = varray_color[11] = varray_color[15] = 1;
179 R_SkyBoxPolyVec(0, 1, 0, -1, -1, 1);
180 R_SkyBoxPolyVec(1, 1, 1, -1, -1, -1);
181 R_SkyBoxPolyVec(2, 0, 1, 1, -1, -1);
182 R_SkyBoxPolyVec(3, 0, 0, 1, -1, 1);
184 m.tex[0] = R_GetTexture(skyboxside[4]); // up
186 memcpy(varray_element, skyboxindex, sizeof(int[6]));
187 varray_color[0] = varray_color[4] = varray_color[8] = varray_color[12] = mesh_colorscale;
188 varray_color[1] = varray_color[5] = varray_color[9] = varray_color[13] = mesh_colorscale;
189 varray_color[2] = varray_color[6] = varray_color[10] = varray_color[14] = mesh_colorscale;
190 varray_color[3] = varray_color[7] = varray_color[11] = varray_color[15] = 1;
191 R_SkyBoxPolyVec(0, 1, 0, 1, -1, 1);
192 R_SkyBoxPolyVec(1, 1, 1, 1, 1, 1);
193 R_SkyBoxPolyVec(2, 0, 1, -1, 1, 1);
194 R_SkyBoxPolyVec(3, 0, 0, -1, -1, 1);
196 m.tex[0] = R_GetTexture(skyboxside[5]); // down
198 memcpy(varray_element, skyboxindex, sizeof(int[6]));
199 varray_color[0] = varray_color[4] = varray_color[8] = varray_color[12] = mesh_colorscale;
200 varray_color[1] = varray_color[5] = varray_color[9] = varray_color[13] = mesh_colorscale;
201 varray_color[2] = varray_color[6] = varray_color[10] = varray_color[14] = mesh_colorscale;
202 varray_color[3] = varray_color[7] = varray_color[11] = varray_color[15] = 1;
203 R_SkyBoxPolyVec(0, 1, 0, 1, 1, -1);
204 R_SkyBoxPolyVec(1, 1, 1, 1, -1, -1);
205 R_SkyBoxPolyVec(2, 0, 1, -1, -1, -1);
206 R_SkyBoxPolyVec(3, 0, 0, -1, 1, -1);
211 #define skygridx1 (skygridx + 1)
212 #define skygridxrecip (1.0f / (skygridx))
214 #define skygridy1 (skygridy + 1)
215 #define skygridyrecip (1.0f / (skygridy))
217 static float skysphere[skygridx1*skygridy1*5];
218 static int skysphereindices[skygridx*skygridy*6];
219 static void skyspherecalc(float *sphere, float dx, float dy, float dz)
221 float a, b, x, ax, ay, v[3], length;
223 for (j = 0;j <= skygridy;j++)
225 a = j * skygridyrecip;
226 ax = cos(a * M_PI * 2);
227 ay = -sin(a * M_PI * 2);
228 for (i = 0;i <= skygridx;i++)
230 b = i * skygridxrecip;
231 x = cos(b * M_PI * 2);
234 v[2] = -sin(b * M_PI * 2) * dz;
235 length = 3.0f / sqrt(v[0]*v[0]+v[1]*v[1]+(v[2]*v[2]*9));
236 *sphere++ = v[0] * length;
237 *sphere++ = v[1] * length;
243 index = skysphereindices;
244 for (j = 0;j < skygridy;j++)
246 for (i = 0;i < skygridx;i++)
248 *index++ = j * skygridx1 + i;
249 *index++ = j * skygridx1 + i + 1;
250 *index++ = (j + 1) * skygridx1 + i;
252 *index++ = j * skygridx1 + i + 1;
253 *index++ = (j + 1) * skygridx1 + i + 1;
254 *index++ = (j + 1) * skygridx1 + i;
260 static void skyspherearrays(float *v, float *t, float *c, float *source, float s, float colorscale)
263 for (i = 0;i < (skygridx1*skygridy1);i++, c += 4, t += 2, v += 4, source += 5)
269 t[0] = source[0] + s;
270 t[1] = source[1] + s;
277 static void R_SkySphere(void)
279 int numverts, numtriangles;
280 float speedscale, speedscale2;
281 static qboolean skysphereinitialized = false;
283 if (!skysphereinitialized)
285 skysphereinitialized = true;
286 skyspherecalc(skysphere, 16, 16, 16 / 3);
289 speedscale = cl.time*8.0/128.0;
290 speedscale -= (int)speedscale;
291 speedscale2 = cl.time*16.0/128.0;
292 speedscale2 -= (int)speedscale2;
294 numverts = skygridx1*skygridy1;
295 numtriangles = skygridx*skygridy*2;
297 R_Mesh_ResizeCheck(numverts, numtriangles);
299 memset(&m, 0, sizeof(m));
300 m.blendfunc1 = GL_ONE;
301 m.blendfunc2 = GL_ZERO;
302 m.wantoverbright = false;
303 m.depthdisable = true; // don't modify or read zbuffer
304 m.tex[0] = R_GetTexture(solidskytexture);
307 memcpy(varray_element, skysphereindices, numtriangles * sizeof(int[3]));
308 skyspherearrays(varray_vertex, varray_texcoord[0], varray_color, skysphere, speedscale, mesh_colorscale);
309 R_Mesh_Draw(numverts, numtriangles);
311 m.blendfunc1 = GL_SRC_ALPHA;
312 m.blendfunc2 = GL_ONE_MINUS_SRC_ALPHA;
313 m.tex[0] = R_GetTexture(alphaskytexture);
316 memcpy(varray_element, skysphereindices, numtriangles * sizeof(int[3]));
317 skyspherearrays(varray_vertex, varray_texcoord[0], varray_color, skysphere, speedscale2, mesh_colorscale);
318 R_Mesh_Draw(numverts, numtriangles);
323 matrix4x4_t skymatrix;
326 Matrix4x4_CreateTranslate(&skymatrix, r_origin[0], r_origin[1], r_origin[2]);
327 R_Mesh_Matrix(&skymatrix);
330 // this does not modify depth buffer
333 else if (skyrenderbox)
335 // this does not modify depth buffer
338 /* this will be skyroom someday
341 // this modifies the depth buffer so we have to clear it afterward
343 // clear the depthbuffer that was used while rendering the skyroom
344 //R_Mesh_ClearDepth();
350 //===============================================================
356 A sky texture is 256*128, with the right side being a masked overlay
359 void R_InitSky (qbyte *src, int bytesperpixel)
361 int i, j, p, r, g, b;
362 qbyte skyupperlayerpixels[128*128*4], skylowerlayerpixels[128*128*4];
363 unsigned trans[128*128], transpix, *rgba;
365 skyavailable_quake = true;
367 // flush skytexturepool so we won't build up a leak from uploading textures multiple times
368 R_FreeTexturePool(&skytexturepool);
369 skytexturepool = R_AllocTexturePool();
370 solidskytexture = NULL;
371 alphaskytexture = NULL;
373 if (bytesperpixel == 4)
375 for (i = 0;i < 128;i++)
376 for (j = 0;j < 128;j++)
377 trans[(i*128) + j] = src[i*256+j+128];
381 // make an average value for the back to avoid
382 // a fringe on the top level
384 for (i=0 ; i<128 ; i++)
386 for (j=0 ; j<128 ; j++)
388 p = src[i*256 + j + 128];
389 rgba = &d_8to24table[p];
390 trans[(i*128) + j] = *rgba;
391 r += ((qbyte *)rgba)[0];
392 g += ((qbyte *)rgba)[1];
393 b += ((qbyte *)rgba)[2];
397 ((qbyte *)&transpix)[0] = r/(128*128);
398 ((qbyte *)&transpix)[1] = g/(128*128);
399 ((qbyte *)&transpix)[2] = b/(128*128);
400 ((qbyte *)&transpix)[3] = 0;
403 memcpy(skyupperlayerpixels, trans, 128*128*4);
405 solidskytexture = R_LoadTexture (skytexturepool, "sky_solidtexture", 128, 128, (qbyte *) trans, TEXTYPE_RGBA, TEXF_PRECACHE);
407 if (bytesperpixel == 4)
409 for (i = 0;i < 128;i++)
410 for (j = 0;j < 128;j++)
411 trans[(i*128) + j] = src[i*256+j];
415 for (i=0 ; i<128 ; i++)
417 for (j=0 ; j<128 ; j++)
421 trans[(i*128) + j] = transpix;
423 trans[(i*128) + j] = d_8to24table[p];
428 memcpy(skylowerlayerpixels, trans, 128*128*4);
430 alphaskytexture = R_LoadTexture (skytexturepool, "sky_alphatexture", 128, 128, (qbyte *) trans, TEXTYPE_RGBA, TEXF_ALPHA | TEXF_PRECACHE);
433 void R_ResetQuakeSky(void)
435 skyavailable_quake = false;
438 void R_ResetSkyBox(void)
440 skyboxside[0] = skyboxside[1] = skyboxside[2] = skyboxside[3] = skyboxside[4] = skyboxside[5] = NULL;
442 skyavailable_box = false;
445 static void r_sky_start(void)
447 skytexturepool = R_AllocTexturePool();
448 solidskytexture = NULL;
449 alphaskytexture = NULL;
452 static void r_sky_shutdown(void)
454 R_FreeTexturePool(&skytexturepool);
455 solidskytexture = NULL;
456 alphaskytexture = NULL;
459 static void r_sky_newmap(void)
463 void R_Sky_Init(void)
465 Cmd_AddCommand ("loadsky", &LoadSky_f);
466 Cvar_RegisterVariable (&r_sky);
467 R_RegisterModule("R_Sky", r_sky_start, r_sky_shutdown, r_sky_newmap);