2 Copyright (C) 1996-1997 Id Software, Inc.
4 This program is free software; you can redistribute it and/or
5 modify it under the terms of the GNU General Public License
6 as published by the Free Software Foundation; either version 2
7 of the License, or (at your option) any later version.
9 This program is distributed in the hope that it will be useful,
10 but WITHOUT ANY WARRANTY; without even the implied warranty of
11 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.
13 See the GNU General Public License for more details.
15 You should have received a copy of the GNU General Public License
16 along with this program; if not, write to the Free Software
17 Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
24 entity_render_t *currentrenderentity;
26 // used for dlight push checking and other things
31 int c_brush_polys, c_alias_polys, c_light_polys, c_faces, c_nodes, c_leafs, c_models, c_bmodels, c_sprites, c_particles, c_dlights;
33 // true during envmap command capture
49 mleaf_t *r_viewleaf, *r_oldviewleaf;
51 // 8.8 fraction of base light value
52 unsigned short d_lightstylevalue[256];
54 cvar_t r_drawentities = {0, "r_drawentities","1"};
55 cvar_t r_drawviewmodel = {0, "r_drawviewmodel","1"};
56 cvar_t r_speeds = {0, "r_speeds","0"};
57 cvar_t r_fullbright = {0, "r_fullbright","0"};
58 cvar_t r_wateralpha = {CVAR_SAVE, "r_wateralpha","1"};
59 cvar_t r_dynamic = {CVAR_SAVE, "r_dynamic","1"};
60 cvar_t r_fullbrights = {CVAR_SAVE, "r_fullbrights", "1"};
62 cvar_t gl_fogenable = {0, "gl_fogenable", "0"};
63 cvar_t gl_fogdensity = {0, "gl_fogdensity", "0.25"};
64 cvar_t gl_fogred = {0, "gl_fogred","0.3"};
65 cvar_t gl_foggreen = {0, "gl_foggreen","0.3"};
66 cvar_t gl_fogblue = {0, "gl_fogblue","0.3"};
67 cvar_t gl_fogstart = {0, "gl_fogstart", "0"};
68 cvar_t gl_fogend = {0, "gl_fogend","0"};
70 cvar_t r_textureunits = {0, "r_textureunits", "32"};
76 For program optimization
79 qboolean intimerefresh = 0;
80 static void R_TimeRefresh_f (void)
83 float start, stop, time;
86 start = Sys_DoubleTime ();
87 for (i = 0;i < 128;i++)
89 r_refdef.viewangles[0] = 0;
90 r_refdef.viewangles[1] = i/128.0*360.0;
91 r_refdef.viewangles[2] = 0;
95 stop = Sys_DoubleTime ();
98 Con_Printf ("%f seconds (%f fps)\n", time, 128/time);
101 extern cvar_t r_drawportals;
103 int R_VisibleCullBox (vec3_t mins, vec3_t maxs)
106 mnode_t *nodestack[8192], *node;
109 if (R_CullBox(mins, maxs))
112 node = cl.worldmodel->nodes;
114 if (node->contents < 0)
116 if (((mleaf_t *)node)->visframe == r_framecount)
120 node = nodestack[--stack];
124 sides = BOX_ON_PLANE_SIDE(mins, maxs, node->plane);
126 // recurse down the contacted sides
131 // put second child on the stack for later examination
132 nodestack[stack++] = node->children[1];
133 node = node->children[0];
138 node = node->children[0];
143 node = node->children[1];
149 float fog_density, fog_red, fog_green, fog_blue;
151 qboolean oldgl_fogenable;
152 void R_SetupFog(void)
154 if (gamemode == GAME_NEHAHRA)
156 if (gl_fogenable.integer)
158 oldgl_fogenable = true;
159 fog_density = gl_fogdensity.value;
160 fog_red = gl_fogred.value;
161 fog_green = gl_foggreen.value;
162 fog_blue = gl_fogblue.value;
164 else if (oldgl_fogenable)
166 oldgl_fogenable = false;
175 fogcolor[0] = fog_red = bound(0.0f, fog_red , 1.0f);
176 fogcolor[1] = fog_green = bound(0.0f, fog_green, 1.0f);
177 fogcolor[2] = fog_blue = bound(0.0f, fog_blue , 1.0f);
182 fogdensity = -4000.0f / (fog_density * fog_density);
183 // fog color was already set
189 // FIXME: move this to client?
192 if (gamemode == GAME_NEHAHRA)
194 Cvar_Set("gl_fogenable", "0");
195 Cvar_Set("gl_fogdensity", "0.2");
196 Cvar_Set("gl_fogred", "0.3");
197 Cvar_Set("gl_foggreen", "0.3");
198 Cvar_Set("gl_fogblue", "0.3");
200 fog_density = fog_red = fog_green = fog_blue = 0.0f;
203 // FIXME: move this to client?
204 void FOG_registercvars(void)
206 if (gamemode == GAME_NEHAHRA)
208 Cvar_RegisterVariable (&gl_fogenable);
209 Cvar_RegisterVariable (&gl_fogdensity);
210 Cvar_RegisterVariable (&gl_fogred);
211 Cvar_RegisterVariable (&gl_foggreen);
212 Cvar_RegisterVariable (&gl_fogblue);
213 Cvar_RegisterVariable (&gl_fogstart);
214 Cvar_RegisterVariable (&gl_fogend);
218 void gl_main_start(void)
222 void gl_main_shutdown(void)
226 void gl_main_newmap(void)
231 void GL_Main_Init(void)
233 // FIXME: move this to client?
235 Cmd_AddCommand ("timerefresh", R_TimeRefresh_f);
236 Cvar_RegisterVariable (&r_drawentities);
237 Cvar_RegisterVariable (&r_drawviewmodel);
238 Cvar_RegisterVariable (&r_speeds);
239 Cvar_RegisterVariable (&r_fullbrights);
240 Cvar_RegisterVariable (&r_wateralpha);
241 Cvar_RegisterVariable (&r_dynamic);
242 Cvar_RegisterVariable (&r_fullbright);
243 Cvar_RegisterVariable (&r_textureunits);
244 if (gamemode == GAME_NEHAHRA)
245 Cvar_SetValue("r_fullbrights", 0);
246 R_RegisterModule("GL_Main", gl_main_start, gl_main_shutdown, gl_main_newmap);
249 vec3_t r_farclip_origin;
250 vec3_t r_farclip_direction;
251 vec_t r_farclip_directiondist;
252 vec_t r_farclip_meshfarclip;
253 int r_farclip_directionbit0;
254 int r_farclip_directionbit1;
255 int r_farclip_directionbit2;
257 // start a farclip measuring session
258 void R_FarClip_Start(vec3_t origin, vec3_t direction, vec_t startfarclip)
260 VectorCopy(origin, r_farclip_origin);
261 VectorCopy(direction, r_farclip_direction);
262 r_farclip_directiondist = DotProduct(r_farclip_origin, r_farclip_direction);
263 r_farclip_directionbit0 = r_farclip_direction[0] < 0;
264 r_farclip_directionbit1 = r_farclip_direction[1] < 0;
265 r_farclip_directionbit2 = r_farclip_direction[2] < 0;
266 r_farclip_meshfarclip = r_farclip_directiondist + startfarclip;
269 // enlarge farclip to accomodate box
270 void R_FarClip_Box(vec3_t mins, vec3_t maxs)
273 d = (r_farclip_directionbit0 ? mins[0] : maxs[0]) * r_farclip_direction[0]
274 + (r_farclip_directionbit1 ? mins[1] : maxs[1]) * r_farclip_direction[1]
275 + (r_farclip_directionbit2 ? mins[2] : maxs[2]) * r_farclip_direction[2];
276 if (r_farclip_meshfarclip < d)
277 r_farclip_meshfarclip = d;
280 // return farclip value
281 float R_FarClip_Finish(void)
283 return r_farclip_meshfarclip - r_farclip_directiondist;
291 void CL_ParseEntityLump(char *entitystring);
296 for (i = 0;i < 256;i++)
297 d_lightstylevalue[i] = 264; // normal light value
300 if (cl.worldmodel->entities)
301 CL_ParseEntityLump(cl.worldmodel->entities);
307 extern void R_Textures_Init(void);
308 extern void Mod_RenderInit(void);
309 extern void GL_Draw_Init(void);
310 extern void GL_Main_Init(void);
311 extern void GL_Models_Init(void);
312 extern void R_Sky_Init(void);
313 extern void GL_Surf_Init(void);
314 extern void R_Crosshairs_Init(void);
315 extern void R_Light_Init(void);
316 extern void R_Particles_Init(void);
317 extern void R_Explosion_Init(void);
318 extern void ui_init(void);
319 extern void gl_backend_init(void);
321 void Render_Init(void)
323 R_Modules_Shutdown();
345 extern char *ENGINE_EXTENSIONS;
348 VID_CheckExtensions();
350 // LordHavoc: report supported extensions
351 Con_Printf ("\nengine extensions: %s\n", ENGINE_EXTENSIONS);
353 qglCullFace(GL_FRONT);
354 qglEnable(GL_TEXTURE_2D);
358 //==================================================================================
360 static void R_MarkEntities (void)
365 R_FarClip_Box(cl.worldmodel->normalmins, cl.worldmodel->normalmaxs);
367 if (!r_drawentities.integer)
370 for (i = 0;i < r_refdef.numentities;i++)
372 currentrenderentity = r_refdef.entities[i];
373 Mod_CheckLoaded(currentrenderentity->model);
375 // move view-relative models to where they should be
376 if (currentrenderentity->flags & RENDER_VIEWMODEL)
378 // remove flag so it will not be repeated incase RelinkEntities is not called again for a while
379 currentrenderentity->flags -= RENDER_VIEWMODEL;
381 VectorCopy(currentrenderentity->origin, v);
382 currentrenderentity->origin[0] = v[0] * vpn[0] + v[1] * vright[0] + v[2] * vup[0] + r_origin[0];
383 currentrenderentity->origin[1] = v[0] * vpn[1] + v[1] * vright[1] + v[2] * vup[1] + r_origin[1];
384 currentrenderentity->origin[2] = v[0] * vpn[2] + v[1] * vright[2] + v[2] * vup[2] + r_origin[2];
386 VectorAdd(currentrenderentity->angles, r_refdef.viewangles, currentrenderentity->angles);
389 if (currentrenderentity->angles[0] || currentrenderentity->angles[2])
391 VectorMA(currentrenderentity->origin, currentrenderentity->scale, currentrenderentity->model->rotatedmins, currentrenderentity->mins);
392 VectorMA(currentrenderentity->origin, currentrenderentity->scale, currentrenderentity->model->rotatedmaxs, currentrenderentity->maxs);
394 else if (currentrenderentity->angles[1])
396 VectorMA(currentrenderentity->origin, currentrenderentity->scale, currentrenderentity->model->yawmins, currentrenderentity->mins);
397 VectorMA(currentrenderentity->origin, currentrenderentity->scale, currentrenderentity->model->yawmaxs, currentrenderentity->maxs);
401 VectorMA(currentrenderentity->origin, currentrenderentity->scale, currentrenderentity->model->normalmins, currentrenderentity->mins);
402 VectorMA(currentrenderentity->origin, currentrenderentity->scale, currentrenderentity->model->normalmaxs, currentrenderentity->maxs);
404 if (R_VisibleCullBox(currentrenderentity->mins, currentrenderentity->maxs))
407 R_LerpAnimation(currentrenderentity);
408 currentrenderentity->visframe = r_framecount;
410 R_FarClip_Box(currentrenderentity->mins, currentrenderentity->maxs);
414 // only used if skyrendermasked, and normally returns false
415 int R_DrawBModelSky (void)
419 if (!r_drawentities.integer)
423 for (i = 0;i < r_refdef.numentities;i++)
425 currentrenderentity = r_refdef.entities[i];
426 if (currentrenderentity->visframe == r_framecount && currentrenderentity->model->DrawSky)
428 currentrenderentity->model->DrawSky();
435 void R_DrawModels (void)
439 if (!r_drawentities.integer)
442 for (i = 0;i < r_refdef.numentities;i++)
444 currentrenderentity = r_refdef.entities[i];
445 if (currentrenderentity->visframe == r_framecount && currentrenderentity->model->Draw)
446 currentrenderentity->model->Draw();
455 void R_DrawViewModel (void)
457 // FIXME: move these checks to client
458 if (!r_drawviewmodel.integer || chase_active.integer || envmap || !r_drawentities.integer || cl.items & IT_INVISIBILITY || cl.stats[STAT_HEALTH] <= 0 || !cl.viewent.render.model)
461 currentrenderentity = &cl.viewent.render;
462 Mod_CheckLoaded(currentrenderentity->model);
464 R_LerpAnimation(currentrenderentity);
466 currentrenderentity->model->Draw();
469 static void R_SetFrustum (void)
473 // LordHavoc: note to all quake engine coders, the special case for 90
474 // degrees assumed a square view (wrong), so I removed it, Quake2 has it
476 // rotate VPN right by FOV_X/2 degrees
477 RotatePointAroundVector( frustum[0].normal, vup, vpn, -(90-r_refdef.fov_x / 2 ) );
478 // rotate VPN left by FOV_X/2 degrees
479 RotatePointAroundVector( frustum[1].normal, vup, vpn, 90-r_refdef.fov_x / 2 );
480 // rotate VPN up by FOV_X/2 degrees
481 RotatePointAroundVector( frustum[2].normal, vright, vpn, 90-r_refdef.fov_y / 2 );
482 // rotate VPN down by FOV_X/2 degrees
483 RotatePointAroundVector( frustum[3].normal, vright, vpn, -( 90 - r_refdef.fov_y / 2 ) );
485 for (i = 0;i < 4;i++)
487 frustum[i].type = PLANE_ANYZ;
488 frustum[i].dist = DotProduct (r_origin, frustum[i].normal);
489 PlaneClassify(&frustum[i]);
498 static void R_SetupFrame (void)
500 // don't allow cheats in multiplayer
501 if (cl.maxclients > 1)
503 if (r_fullbright.integer != 0)
504 Cvar_Set ("r_fullbright", "0");
505 if (r_ambient.value != 0)
506 Cvar_Set ("r_ambient", "0");
511 // build the transformation matrix for the given view angles
512 VectorCopy (r_refdef.vieworg, r_origin);
514 AngleVectors (r_refdef.viewangles, vpn, vright, vup);
517 r_oldviewleaf = r_viewleaf;
518 r_viewleaf = Mod_PointInLeaf (r_origin, cl.worldmodel);
524 static void R_BlendView(void)
529 if (r_refdef.viewblend[3] < 0.01f)
532 memset(&m, 0, sizeof(m));
533 m.transparent = false;
534 m.blendfunc1 = GL_SRC_ALPHA;
535 m.blendfunc2 = GL_ONE_MINUS_SRC_ALPHA;
536 m.depthdisable = true; // magic
539 if (R_Mesh_Draw_GetBuffer(&m, false))
544 m.color[0] = m.color[4] = m.color[8] = r_refdef.viewblend[0];
545 m.color[1] = m.color[5] = m.color[9] = r_refdef.viewblend[1];
546 m.color[2] = m.color[6] = m.color[10] = r_refdef.viewblend[2];
547 m.color[3] = m.color[7] = m.color[11] = r_refdef.viewblend[3];
549 m.vertex[0] = r_origin[0] + vpn[0] * 1.5 - vright[0] * r - vup[0] * r;
550 m.vertex[1] = r_origin[1] + vpn[1] * 1.5 - vright[1] * r - vup[1] * r;
551 m.vertex[2] = r_origin[2] + vpn[2] * 1.5 - vright[2] * r - vup[2] * r;
553 m.vertex[4] = m.vertex[0] + vup[0] * r;
554 m.vertex[5] = m.vertex[1] + vup[1] * r;
555 m.vertex[6] = m.vertex[2] + vup[2] * r;
556 m.vertex[8] = m.vertex[0] + vright[0] * r;
557 m.vertex[9] = m.vertex[1] + vright[1] * r;
558 m.vertex[10] = m.vertex[2] + vright[2] * r;
567 r_refdef must be set before the first call
570 void R_RenderView (void)
573 return; //Host_Error ("R_RenderView: NULL worldmodel");
575 // FIXME: move to client
577 R_TimeReport("mexplosion");
585 R_FarClip_Start(r_origin, vpn, 768.0f);
587 R_TimeReport("setup");
590 R_TimeReport("worldnode");
593 R_TimeReport("markentity");
596 R_TimeReport("marklights");
598 r_farclip = R_FarClip_Finish() + 256.0f;
600 R_Mesh_Start(r_farclip);
604 if (R_DrawBModelSky())
605 R_TimeReport("bmodelsky");
610 R_TimeReport("viewmodel");
613 R_SetupForWorldRendering();
615 R_TimeReport("surfprep");
617 R_DrawSurfaces(SHADERSTAGE_SKY);
618 R_DrawSurfaces(SHADERSTAGE_NORMAL);
619 R_TimeReport("surfdraw");
621 if (r_drawportals.integer)
624 R_TimeReport("portals");
627 // don't let sound skip if going slow
628 if (!intimerefresh && !r_speeds.integer)
634 R_TimeReport("viewmodel");
638 R_TimeReport("models");
641 R_TimeReport("particles");
644 R_TimeReport("explosions");
646 // draw transparent meshs
647 R_Mesh_AddTransparent();
648 R_TimeReport("addtrans");
651 R_TimeReport("coronas");
654 R_TimeReport("blendview");
657 R_TimeReport("crosshair");
659 // render any queued meshs
661 R_TimeReport("meshfinish");