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];
18 int R_SetSkyBox(char *sky);
20 void R_SkyStartFrame(void)
23 skyrendersphere = false;
25 skyrendermasked = false;
26 if (r_sky.integer && !fogenabled)
30 else if (skyavailable_quake)
31 skyrendersphere = true;
32 // for depth-masked sky, render the sky on the first sky surface encountered
34 skyrendermasked = true;
43 int R_SetSkyBox(char *sky)
49 if (strcmp(sky, skyname) == 0) // no change
52 skyboxside[0] = skyboxside[1] = skyboxside[2] = skyboxside[3] = skyboxside[4] = skyboxside[5] = NULL;
53 skyavailable_box = false;
59 if (strlen(sky) > 1000)
61 Con_Printf ("sky name too long (%i, max is 1000)\n", strlen(sky));
67 sprintf (name, "env/%s%s", sky, suf[i]);
68 if (!(image_rgba = loadimagepixels(name, false, 0, 0)))
70 sprintf (name, "gfx/env/%s%s", sky, suf[i]);
71 if (!(image_rgba = loadimagepixels(name, false, 0, 0)))
73 Con_Printf ("Couldn't load env/%s%s or gfx/env/%s%s\n", sky, suf[i], sky, suf[i]);
77 skyboxside[i] = R_LoadTexture(skytexturepool, va("skyboxside%d", i), image_width, image_height, image_rgba, TEXTYPE_RGBA, TEXF_PRECACHE);
81 if (skyboxside[0] || skyboxside[1] || skyboxside[2] || skyboxside[3] || skyboxside[4] || skyboxside[5])
83 skyavailable_box = true;
90 // LordHavoc: added LoadSky console command
97 Con_Printf("current sky: %s\n", skyname);
99 Con_Printf("no skybox has been set\n");
102 if (R_SetSkyBox(Cmd_Argv(1)))
105 Con_Printf("skybox set to %s\n", skyname);
107 Con_Printf("skybox disabled\n");
110 Con_Printf("failed to load skybox %s\n", Cmd_Argv(1));
113 Con_Printf("usage: loadsky skyname\n");
118 int skyboxindex[6] = {0, 1, 2, 0, 2, 3};
120 static void R_SkyBox(void)
124 #define R_SkyBoxPolyVec(i,s,t,x,y,z) \
125 varray_vertex[i * 4 + 0] = (x) * 16.0f;\
126 varray_vertex[i * 4 + 1] = (y) * 16.0f;\
127 varray_vertex[i * 4 + 2] = (z) * 16.0f;\
128 varray_texcoord[0][i * 2 + 0] = (s) * (254.0f/256.0f) + (1.0f/256.0f);\
129 varray_texcoord[0][i * 2 + 1] = (t) * (254.0f/256.0f) + (1.0f/256.0f);
131 memset(&m, 0, sizeof(m));
132 m.blendfunc1 = GL_ONE;
133 m.blendfunc2 = GL_ZERO;
134 m.wantoverbright = false;
135 m.depthdisable = true; // don't modify or read zbuffer
136 m.tex[0] = R_GetTexture(skyboxside[3]); // front
139 memcpy(varray_element, skyboxindex, sizeof(int[6]));
140 varray_color[0] = varray_color[4] = varray_color[8] = varray_color[12] = mesh_colorscale;
141 varray_color[1] = varray_color[5] = varray_color[9] = varray_color[13] = mesh_colorscale;
142 varray_color[2] = varray_color[6] = varray_color[10] = varray_color[14] = mesh_colorscale;
143 varray_color[3] = varray_color[7] = varray_color[11] = varray_color[15] = 1;
144 R_SkyBoxPolyVec(0, 1, 0, 1, -1, 1);
145 R_SkyBoxPolyVec(1, 1, 1, 1, -1, -1);
146 R_SkyBoxPolyVec(2, 0, 1, 1, 1, -1);
147 R_SkyBoxPolyVec(3, 0, 0, 1, 1, 1);
149 m.tex[0] = R_GetTexture(skyboxside[1]); // back
151 memcpy(varray_element, skyboxindex, sizeof(int[6]));
152 varray_color[0] = varray_color[4] = varray_color[8] = varray_color[12] = mesh_colorscale;
153 varray_color[1] = varray_color[5] = varray_color[9] = varray_color[13] = mesh_colorscale;
154 varray_color[2] = varray_color[6] = varray_color[10] = varray_color[14] = mesh_colorscale;
155 varray_color[3] = varray_color[7] = varray_color[11] = varray_color[15] = 1;
156 R_SkyBoxPolyVec(0, 1, 0, -1, 1, 1);
157 R_SkyBoxPolyVec(1, 1, 1, -1, 1, -1);
158 R_SkyBoxPolyVec(2, 0, 1, -1, -1, -1);
159 R_SkyBoxPolyVec(3, 0, 0, -1, -1, 1);
161 m.tex[0] = R_GetTexture(skyboxside[0]); // right
163 memcpy(varray_element, skyboxindex, sizeof(int[6]));
164 varray_color[0] = varray_color[4] = varray_color[8] = varray_color[12] = mesh_colorscale;
165 varray_color[1] = varray_color[5] = varray_color[9] = varray_color[13] = mesh_colorscale;
166 varray_color[2] = varray_color[6] = varray_color[10] = varray_color[14] = mesh_colorscale;
167 varray_color[3] = varray_color[7] = varray_color[11] = varray_color[15] = 1;
168 R_SkyBoxPolyVec(0, 1, 0, 1, 1, 1);
169 R_SkyBoxPolyVec(1, 1, 1, 1, 1, -1);
170 R_SkyBoxPolyVec(2, 0, 1, -1, 1, -1);
171 R_SkyBoxPolyVec(3, 0, 0, -1, 1, 1);
173 m.tex[0] = R_GetTexture(skyboxside[2]); // left
175 memcpy(varray_element, skyboxindex, sizeof(int[6]));
176 varray_color[0] = varray_color[4] = varray_color[8] = varray_color[12] = mesh_colorscale;
177 varray_color[1] = varray_color[5] = varray_color[9] = varray_color[13] = mesh_colorscale;
178 varray_color[2] = varray_color[6] = varray_color[10] = varray_color[14] = mesh_colorscale;
179 varray_color[3] = varray_color[7] = varray_color[11] = varray_color[15] = 1;
180 R_SkyBoxPolyVec(0, 1, 0, -1, -1, 1);
181 R_SkyBoxPolyVec(1, 1, 1, -1, -1, -1);
182 R_SkyBoxPolyVec(2, 0, 1, 1, -1, -1);
183 R_SkyBoxPolyVec(3, 0, 0, 1, -1, 1);
185 m.tex[0] = R_GetTexture(skyboxside[4]); // up
187 memcpy(varray_element, skyboxindex, sizeof(int[6]));
188 varray_color[0] = varray_color[4] = varray_color[8] = varray_color[12] = mesh_colorscale;
189 varray_color[1] = varray_color[5] = varray_color[9] = varray_color[13] = mesh_colorscale;
190 varray_color[2] = varray_color[6] = varray_color[10] = varray_color[14] = mesh_colorscale;
191 varray_color[3] = varray_color[7] = varray_color[11] = varray_color[15] = 1;
192 R_SkyBoxPolyVec(0, 1, 0, 1, -1, 1);
193 R_SkyBoxPolyVec(1, 1, 1, 1, 1, 1);
194 R_SkyBoxPolyVec(2, 0, 1, -1, 1, 1);
195 R_SkyBoxPolyVec(3, 0, 0, -1, -1, 1);
197 m.tex[0] = R_GetTexture(skyboxside[5]); // down
199 memcpy(varray_element, skyboxindex, sizeof(int[6]));
200 varray_color[0] = varray_color[4] = varray_color[8] = varray_color[12] = mesh_colorscale;
201 varray_color[1] = varray_color[5] = varray_color[9] = varray_color[13] = mesh_colorscale;
202 varray_color[2] = varray_color[6] = varray_color[10] = varray_color[14] = mesh_colorscale;
203 varray_color[3] = varray_color[7] = varray_color[11] = varray_color[15] = 1;
204 R_SkyBoxPolyVec(0, 1, 0, 1, 1, -1);
205 R_SkyBoxPolyVec(1, 1, 1, 1, -1, -1);
206 R_SkyBoxPolyVec(2, 0, 1, -1, -1, -1);
207 R_SkyBoxPolyVec(3, 0, 0, -1, 1, -1);
212 #define skygridx1 (skygridx + 1)
213 #define skygridxrecip (1.0f / (skygridx))
215 #define skygridy1 (skygridy + 1)
216 #define skygridyrecip (1.0f / (skygridy))
218 static float skysphere[skygridx1*skygridy1*5];
219 static int skysphereindices[skygridx*skygridy*6];
220 static void skyspherecalc(float *sphere, float dx, float dy, float dz)
222 float a, b, x, ax, ay, v[3], length;
224 for (j = 0;j <= skygridy;j++)
226 a = j * skygridyrecip;
227 ax = cos(a * M_PI * 2);
228 ay = -sin(a * M_PI * 2);
229 for (i = 0;i <= skygridx;i++)
231 b = i * skygridxrecip;
232 x = cos(b * M_PI * 2);
235 v[2] = -sin(b * M_PI * 2) * dz;
236 length = 3.0f / sqrt(v[0]*v[0]+v[1]*v[1]+(v[2]*v[2]*9));
237 *sphere++ = v[0] * length;
238 *sphere++ = v[1] * length;
244 index = skysphereindices;
245 for (j = 0;j < skygridy;j++)
247 for (i = 0;i < skygridx;i++)
249 *index++ = j * skygridx1 + i;
250 *index++ = j * skygridx1 + i + 1;
251 *index++ = (j + 1) * skygridx1 + i;
253 *index++ = j * skygridx1 + i + 1;
254 *index++ = (j + 1) * skygridx1 + i + 1;
255 *index++ = (j + 1) * skygridx1 + i;
261 static void skyspherearrays(float *v, float *t, float *c, float *source, float s, float colorscale)
264 for (i = 0;i < (skygridx1*skygridy1);i++, c += 4, t += 2, v += 4, source += 5)
270 t[0] = source[0] + s;
271 t[1] = source[1] + s;
278 static void R_SkySphere(void)
280 int numverts, numtriangles;
281 float speedscale, speedscale2;
282 static qboolean skysphereinitialized = false;
284 if (!skysphereinitialized)
286 skysphereinitialized = true;
287 skyspherecalc(skysphere, 16, 16, 16 / 3);
290 speedscale = cl.time*8.0/128.0;
291 speedscale -= (int)speedscale;
292 speedscale2 = cl.time*16.0/128.0;
293 speedscale2 -= (int)speedscale2;
295 numverts = skygridx1*skygridy1;
296 numtriangles = skygridx*skygridy*2;
298 R_Mesh_ResizeCheck(numverts, numtriangles);
300 memset(&m, 0, sizeof(m));
301 m.blendfunc1 = GL_ONE;
302 m.blendfunc2 = GL_ZERO;
303 m.wantoverbright = false;
304 m.depthdisable = true; // don't modify or read zbuffer
305 m.tex[0] = R_GetTexture(solidskytexture);
308 memcpy(varray_element, skysphereindices, numtriangles * sizeof(int[3]));
309 skyspherearrays(varray_vertex, varray_texcoord[0], varray_color, skysphere, speedscale, mesh_colorscale);
310 R_Mesh_Draw(numverts, numtriangles);
312 m.blendfunc1 = GL_SRC_ALPHA;
313 m.blendfunc2 = GL_ONE_MINUS_SRC_ALPHA;
314 m.tex[0] = R_GetTexture(alphaskytexture);
317 memcpy(varray_element, skysphereindices, numtriangles * sizeof(int[3]));
318 skyspherearrays(varray_vertex, varray_texcoord[0], varray_color, skysphere, speedscale2, mesh_colorscale);
319 R_Mesh_Draw(numverts, numtriangles);
324 matrix4x4_t skymatrix;
327 Matrix4x4_CreateTranslate(&skymatrix, r_origin[0], r_origin[1], r_origin[2]);
328 R_Mesh_Matrix(&skymatrix);
331 // this does not modify depth buffer
334 else if (skyrenderbox)
336 // this does not modify depth buffer
339 /* this will be skyroom someday
342 // this modifies the depth buffer so we have to clear it afterward
344 // clear the depthbuffer that was used while rendering the skyroom
345 //R_Mesh_ClearDepth();
351 //===============================================================
357 A sky texture is 256*128, with the right side being a masked overlay
360 void R_InitSky (qbyte *src, int bytesperpixel)
362 int i, j, p, r, g, b;
363 qbyte skyupperlayerpixels[128*128*4], skylowerlayerpixels[128*128*4];
364 unsigned trans[128*128], transpix, *rgba;
366 skyavailable_quake = true;
368 // flush skytexturepool so we won't build up a leak from uploading textures multiple times
369 R_FreeTexturePool(&skytexturepool);
370 skytexturepool = R_AllocTexturePool();
371 solidskytexture = NULL;
372 alphaskytexture = NULL;
374 if (bytesperpixel == 4)
376 for (i = 0;i < 128;i++)
377 for (j = 0;j < 128;j++)
378 trans[(i*128) + j] = src[i*256+j+128];
382 // make an average value for the back to avoid
383 // a fringe on the top level
385 for (i=0 ; i<128 ; i++)
387 for (j=0 ; j<128 ; j++)
389 p = src[i*256 + j + 128];
390 rgba = &d_8to24table[p];
391 trans[(i*128) + j] = *rgba;
392 r += ((qbyte *)rgba)[0];
393 g += ((qbyte *)rgba)[1];
394 b += ((qbyte *)rgba)[2];
398 ((qbyte *)&transpix)[0] = r/(128*128);
399 ((qbyte *)&transpix)[1] = g/(128*128);
400 ((qbyte *)&transpix)[2] = b/(128*128);
401 ((qbyte *)&transpix)[3] = 0;
404 memcpy(skyupperlayerpixels, trans, 128*128*4);
406 solidskytexture = R_LoadTexture (skytexturepool, "sky_solidtexture", 128, 128, (qbyte *) trans, TEXTYPE_RGBA, TEXF_PRECACHE);
408 if (bytesperpixel == 4)
410 for (i = 0;i < 128;i++)
411 for (j = 0;j < 128;j++)
412 trans[(i*128) + j] = src[i*256+j];
416 for (i=0 ; i<128 ; i++)
418 for (j=0 ; j<128 ; j++)
422 trans[(i*128) + j] = transpix;
424 trans[(i*128) + j] = d_8to24table[p];
429 memcpy(skylowerlayerpixels, trans, 128*128*4);
431 alphaskytexture = R_LoadTexture (skytexturepool, "sky_alphatexture", 128, 128, (qbyte *) trans, TEXTYPE_RGBA, TEXF_ALPHA | TEXF_PRECACHE);
434 void R_ResetQuakeSky(void)
436 skyavailable_quake = false;
439 void R_ResetSkyBox(void)
441 skyboxside[0] = skyboxside[1] = skyboxside[2] = skyboxside[3] = skyboxside[4] = skyboxside[5] = NULL;
443 skyavailable_box = false;
446 static void r_sky_start(void)
448 skytexturepool = R_AllocTexturePool();
449 solidskytexture = NULL;
450 alphaskytexture = NULL;
453 static void r_sky_shutdown(void)
455 R_FreeTexturePool(&skytexturepool);
456 solidskytexture = NULL;
457 alphaskytexture = NULL;
460 static void r_sky_newmap(void)
464 void R_Sky_Init(void)
466 Cmd_AddCommand ("loadsky", &LoadSky_f);
467 Cvar_RegisterVariable (&r_sky);
468 R_RegisterModule("R_Sky", r_sky_start, r_sky_shutdown, r_sky_newmap);