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_waterripple = {CVAR_SAVE, "r_waterripple","0"};
61 cvar_t r_fullbrights = {CVAR_SAVE, "r_fullbrights", "1"};
63 cvar_t gl_fogenable = {0, "gl_fogenable", "0"};
64 cvar_t gl_fogdensity = {0, "gl_fogdensity", "0.25"};
65 cvar_t gl_fogred = {0, "gl_fogred","0.3"};
66 cvar_t gl_foggreen = {0, "gl_foggreen","0.3"};
67 cvar_t gl_fogblue = {0, "gl_fogblue","0.3"};
68 cvar_t gl_fogstart = {0, "gl_fogstart", "0"};
69 cvar_t gl_fogend = {0, "gl_fogend","0"};
71 cvar_t r_multitexture = {0, "r_multitexture", "1"};
77 For program optimization
80 qboolean intimerefresh = 0;
81 static void R_TimeRefresh_f (void)
84 float start, stop, time;
87 start = Sys_DoubleTime ();
88 for (i = 0;i < 128;i++)
90 r_refdef.viewangles[0] = 0;
91 r_refdef.viewangles[1] = i/128.0*360.0;
92 r_refdef.viewangles[2] = 0;
96 stop = Sys_DoubleTime ();
99 Con_Printf ("%f seconds (%f fps)\n", time, 128/time);
102 extern cvar_t r_drawportals;
104 int R_VisibleCullBox (vec3_t mins, vec3_t maxs)
107 mnode_t *nodestack[8192], *node;
110 if (R_CullBox(mins, maxs))
113 node = cl.worldmodel->nodes;
115 if (node->contents < 0)
117 if (((mleaf_t *)node)->visframe == r_framecount)
121 node = nodestack[--stack];
125 sides = BOX_ON_PLANE_SIDE(mins, maxs, node->plane);
127 // recurse down the contacted sides
132 // put second child on the stack for later examination
133 nodestack[stack++] = node->children[1];
134 node = node->children[0];
139 node = node->children[0];
144 node = node->children[1];
150 float fog_density, fog_red, fog_green, fog_blue;
152 qboolean oldgl_fogenable;
153 void R_SetupFog(void)
155 if (gamemode == GAME_NEHAHRA)
157 if (gl_fogenable.integer)
159 oldgl_fogenable = true;
160 fog_density = gl_fogdensity.value;
161 fog_red = gl_fogred.value;
162 fog_green = gl_foggreen.value;
163 fog_blue = gl_fogblue.value;
165 else if (oldgl_fogenable)
167 oldgl_fogenable = false;
176 fogcolor[0] = fog_red = bound(0.0f, fog_red , 1.0f);
177 fogcolor[1] = fog_green = bound(0.0f, fog_green, 1.0f);
178 fogcolor[2] = fog_blue = bound(0.0f, fog_blue , 1.0f);
183 fogdensity = -4000.0f / (fog_density * fog_density);
184 // fog color was already set
190 // FIXME: move this to client?
193 if (gamemode == GAME_NEHAHRA)
195 Cvar_Set("gl_fogenable", "0");
196 Cvar_Set("gl_fogdensity", "0.2");
197 Cvar_Set("gl_fogred", "0.3");
198 Cvar_Set("gl_foggreen", "0.3");
199 Cvar_Set("gl_fogblue", "0.3");
201 fog_density = fog_red = fog_green = fog_blue = 0.0f;
204 // FIXME: move this to client?
205 void FOG_registercvars(void)
207 if (gamemode == GAME_NEHAHRA)
209 Cvar_RegisterVariable (&gl_fogenable);
210 Cvar_RegisterVariable (&gl_fogdensity);
211 Cvar_RegisterVariable (&gl_fogred);
212 Cvar_RegisterVariable (&gl_foggreen);
213 Cvar_RegisterVariable (&gl_fogblue);
214 Cvar_RegisterVariable (&gl_fogstart);
215 Cvar_RegisterVariable (&gl_fogend);
219 void gl_main_start(void)
223 void gl_main_shutdown(void)
227 void gl_main_newmap(void)
232 void GL_Main_Init(void)
234 // FIXME: move this to client?
236 Cmd_AddCommand ("timerefresh", R_TimeRefresh_f);
237 Cvar_RegisterVariable (&r_drawentities);
238 Cvar_RegisterVariable (&r_drawviewmodel);
239 Cvar_RegisterVariable (&r_speeds);
240 Cvar_RegisterVariable (&r_fullbrights);
241 Cvar_RegisterVariable (&r_wateralpha);
242 Cvar_RegisterVariable (&r_dynamic);
243 Cvar_RegisterVariable (&r_waterripple);
244 Cvar_RegisterVariable (&r_fullbright);
245 Cvar_RegisterVariable (&r_multitexture);
246 if (gamemode == GAME_NEHAHRA)
247 Cvar_SetValue("r_fullbrights", 0);
248 R_RegisterModule("GL_Main", gl_main_start, gl_main_shutdown, gl_main_newmap);
251 vec3_t r_farclip_origin;
252 vec3_t r_farclip_direction;
253 vec_t r_farclip_directiondist;
254 vec_t r_farclip_meshfarclip;
255 int r_farclip_directionbit0;
256 int r_farclip_directionbit1;
257 int r_farclip_directionbit2;
259 // start a farclip measuring session
260 void R_FarClip_Start(vec3_t origin, vec3_t direction, vec_t startfarclip)
262 VectorCopy(origin, r_farclip_origin);
263 VectorCopy(direction, r_farclip_direction);
264 r_farclip_directiondist = DotProduct(r_farclip_origin, r_farclip_direction);
265 r_farclip_directionbit0 = r_farclip_direction[0] < 0;
266 r_farclip_directionbit1 = r_farclip_direction[1] < 0;
267 r_farclip_directionbit2 = r_farclip_direction[2] < 0;
268 r_farclip_meshfarclip = r_farclip_directiondist + startfarclip;
271 // enlarge farclip to accomodate box
272 void R_FarClip_Box(vec3_t mins, vec3_t maxs)
275 d = (r_farclip_directionbit0 ? mins[0] : maxs[0]) * r_farclip_direction[0]
276 + (r_farclip_directionbit1 ? mins[1] : maxs[1]) * r_farclip_direction[1]
277 + (r_farclip_directionbit2 ? mins[2] : maxs[2]) * r_farclip_direction[2];
278 if (r_farclip_meshfarclip < d)
279 r_farclip_meshfarclip = d;
282 // return farclip value
283 float R_FarClip_Finish(void)
285 return r_farclip_meshfarclip - r_farclip_directiondist;
293 void CL_ParseEntityLump(char *entitystring);
298 for (i = 0;i < 256;i++)
299 d_lightstylevalue[i] = 264; // normal light value
302 if (cl.worldmodel->entities)
303 CL_ParseEntityLump(cl.worldmodel->entities);
309 extern void R_Textures_Init(void);
310 extern void Mod_RenderInit(void);
311 extern void GL_Draw_Init(void);
312 extern void GL_Main_Init(void);
313 extern void GL_Models_Init(void);
314 extern void R_Sky_Init(void);
315 extern void GL_Surf_Init(void);
316 extern void R_Crosshairs_Init(void);
317 extern void R_Light_Init(void);
318 extern void R_Particles_Init(void);
319 extern void R_Explosion_Init(void);
320 extern void ui_init(void);
321 extern void gl_backend_init(void);
323 void Render_Init(void)
325 R_Modules_Shutdown();
347 extern char *ENGINE_EXTENSIONS;
350 VID_CheckExtensions();
352 // LordHavoc: report supported extensions
353 Con_Printf ("\nengine extensions: %s\n", ENGINE_EXTENSIONS);
355 qglCullFace(GL_FRONT);
356 qglEnable(GL_TEXTURE_2D);
360 //==================================================================================
362 static void R_MarkEntities (void)
367 R_FarClip_Box(cl.worldmodel->normalmins, cl.worldmodel->normalmaxs);
369 if (!r_drawentities.integer)
372 for (i = 0;i < r_refdef.numentities;i++)
374 currentrenderentity = r_refdef.entities[i];
375 Mod_CheckLoaded(currentrenderentity->model);
377 // move view-relative models to where they should be
378 if (currentrenderentity->flags & RENDER_VIEWMODEL)
380 // remove flag so it will not be repeated incase RelinkEntities is not called again for a while
381 currentrenderentity->flags -= RENDER_VIEWMODEL;
383 VectorCopy(currentrenderentity->origin, v);
384 currentrenderentity->origin[0] = v[0] * vpn[0] + v[1] * vright[0] + v[2] * vup[0] + r_origin[0];
385 currentrenderentity->origin[1] = v[0] * vpn[1] + v[1] * vright[1] + v[2] * vup[1] + r_origin[1];
386 currentrenderentity->origin[2] = v[0] * vpn[2] + v[1] * vright[2] + v[2] * vup[2] + r_origin[2];
388 VectorAdd(currentrenderentity->angles, r_refdef.viewangles, currentrenderentity->angles);
391 if (currentrenderentity->angles[0] || currentrenderentity->angles[2])
393 VectorMA(currentrenderentity->origin, currentrenderentity->scale, currentrenderentity->model->rotatedmins, currentrenderentity->mins);
394 VectorMA(currentrenderentity->origin, currentrenderentity->scale, currentrenderentity->model->rotatedmaxs, currentrenderentity->maxs);
396 else if (currentrenderentity->angles[1])
398 VectorMA(currentrenderentity->origin, currentrenderentity->scale, currentrenderentity->model->yawmins, currentrenderentity->mins);
399 VectorMA(currentrenderentity->origin, currentrenderentity->scale, currentrenderentity->model->yawmaxs, currentrenderentity->maxs);
403 VectorMA(currentrenderentity->origin, currentrenderentity->scale, currentrenderentity->model->normalmins, currentrenderentity->mins);
404 VectorMA(currentrenderentity->origin, currentrenderentity->scale, currentrenderentity->model->normalmaxs, currentrenderentity->maxs);
406 if (R_VisibleCullBox(currentrenderentity->mins, currentrenderentity->maxs))
409 R_LerpAnimation(currentrenderentity);
410 currentrenderentity->visframe = r_framecount;
412 R_FarClip_Box(currentrenderentity->mins, currentrenderentity->maxs);
416 // only used if skyrendermasked, and normally returns false
417 int R_DrawBModelSky (void)
421 if (!r_drawentities.integer)
425 for (i = 0;i < r_refdef.numentities;i++)
427 currentrenderentity = r_refdef.entities[i];
428 if (currentrenderentity->visframe == r_framecount && currentrenderentity->model->DrawSky)
430 currentrenderentity->model->DrawSky();
437 void R_DrawModels (void)
441 if (!r_drawentities.integer)
444 for (i = 0;i < r_refdef.numentities;i++)
446 currentrenderentity = r_refdef.entities[i];
447 if (currentrenderentity->visframe == r_framecount && currentrenderentity->model->Draw)
448 currentrenderentity->model->Draw();
457 void R_DrawViewModel (void)
459 // FIXME: move these checks to client
460 if (!r_drawviewmodel.integer || chase_active.integer || envmap || !r_drawentities.integer || cl.items & IT_INVISIBILITY || cl.stats[STAT_HEALTH] <= 0 || !cl.viewent.render.model)
463 currentrenderentity = &cl.viewent.render;
464 Mod_CheckLoaded(currentrenderentity->model);
466 R_LerpAnimation(currentrenderentity);
468 currentrenderentity->model->Draw();
471 static void R_SetFrustum (void)
475 // LordHavoc: note to all quake engine coders, the special case for 90
476 // degrees assumed a square view (wrong), so I removed it, Quake2 has it
478 // rotate VPN right by FOV_X/2 degrees
479 RotatePointAroundVector( frustum[0].normal, vup, vpn, -(90-r_refdef.fov_x / 2 ) );
480 // rotate VPN left by FOV_X/2 degrees
481 RotatePointAroundVector( frustum[1].normal, vup, vpn, 90-r_refdef.fov_x / 2 );
482 // rotate VPN up by FOV_X/2 degrees
483 RotatePointAroundVector( frustum[2].normal, vright, vpn, 90-r_refdef.fov_y / 2 );
484 // rotate VPN down by FOV_X/2 degrees
485 RotatePointAroundVector( frustum[3].normal, vright, vpn, -( 90 - r_refdef.fov_y / 2 ) );
487 for (i = 0;i < 4;i++)
489 frustum[i].type = PLANE_ANYZ;
490 frustum[i].dist = DotProduct (r_origin, frustum[i].normal);
491 PlaneClassify(&frustum[i]);
500 static void R_SetupFrame (void)
502 // don't allow cheats in multiplayer
503 if (cl.maxclients > 1)
505 if (r_fullbright.integer != 0)
506 Cvar_Set ("r_fullbright", "0");
507 if (r_ambient.value != 0)
508 Cvar_Set ("r_ambient", "0");
510 if (r_multitexture.integer && gl_textureunits < 2)
511 Cvar_SetValue("r_multitexture", 0);
515 // build the transformation matrix for the given view angles
516 VectorCopy (r_refdef.vieworg, r_origin);
518 AngleVectors (r_refdef.viewangles, vpn, vright, vup);
521 r_oldviewleaf = r_viewleaf;
522 r_viewleaf = Mod_PointInLeaf (r_origin, cl.worldmodel);
528 static void R_BlendView(void)
533 if (r_refdef.viewblend[3] < 0.01f)
536 memset(&m, 0, sizeof(m));
537 m.transparent = false;
538 m.blendfunc1 = GL_SRC_ALPHA;
539 m.blendfunc2 = GL_ONE_MINUS_SRC_ALPHA;
540 m.depthdisable = true; // magic
543 if (R_Mesh_Draw_GetBuffer(&m))
548 m.color[0] = m.color[4] = m.color[8] = r_refdef.viewblend[0];
549 m.color[1] = m.color[5] = m.color[9] = r_refdef.viewblend[1];
550 m.color[2] = m.color[6] = m.color[10] = r_refdef.viewblend[2];
551 m.color[3] = m.color[7] = m.color[11] = r_refdef.viewblend[3];
553 m.vertex[0] = r_origin[0] + vpn[0] * 1.5 - vright[0] * r - vup[0] * r;
554 m.vertex[1] = r_origin[1] + vpn[1] * 1.5 - vright[1] * r - vup[1] * r;
555 m.vertex[2] = r_origin[2] + vpn[2] * 1.5 - vright[2] * r - vup[2] * r;
557 m.vertex[4] = m.vertex[0] + vup[0] * r;
558 m.vertex[5] = m.vertex[1] + vup[1] * r;
559 m.vertex[6] = m.vertex[2] + vup[2] * r;
560 m.vertex[8] = m.vertex[0] + vright[0] * r;
561 m.vertex[9] = m.vertex[1] + vright[1] * r;
562 m.vertex[10] = m.vertex[2] + vright[2] * r;
570 r_refdef must be set before the first call
573 void R_RenderView (void)
576 return; //Host_Error ("R_RenderView: NULL worldmodel");
578 // FIXME: move to client
580 R_TimeReport("mexplosion");
588 R_FarClip_Start(r_origin, vpn, 768.0f);
590 R_TimeReport("setup");
593 R_TimeReport("worldnode");
596 R_TimeReport("markentity");
599 R_TimeReport("marklights");
601 r_farclip = R_FarClip_Finish() + 256.0f;
603 R_Mesh_Start(r_farclip);
607 if (R_DrawBModelSky())
608 R_TimeReport("bmodelsky");
613 R_TimeReport("viewmodel");
616 R_SetupForWorldRendering();
618 R_TimeReport("surfprep");
620 R_DrawSurfaces(SHADERSTAGE_SKY);
621 R_DrawSurfaces(SHADERSTAGE_NORMAL);
622 R_TimeReport("surfdraw");
624 if (r_drawportals.integer)
627 R_TimeReport("portals");
630 // don't let sound skip if going slow
631 if (!intimerefresh && !r_speeds.integer)
637 R_TimeReport("viewmodel");
641 R_TimeReport("models");
644 R_TimeReport("particles");
647 R_TimeReport("explosions");
649 // draw transparent meshs
650 R_Mesh_AddTransparent();
651 R_TimeReport("addtrans");
654 R_TimeReport("coronas");
657 R_TimeReport("blendview");
660 R_TimeReport("crosshair");
662 // render any queued meshs
664 R_TimeReport("meshfinish");