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 // used for dlight push checking and other things
29 matrix4x4_t r_identitymatrix;
31 int 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 // 8.8 fraction of base light value
50 unsigned short d_lightstylevalue[256];
52 cvar_t r_drawentities = {0, "r_drawentities","1"};
53 cvar_t r_drawviewmodel = {0, "r_drawviewmodel","1"};
54 cvar_t r_speeds = {0, "r_speeds","0"};
55 cvar_t r_fullbright = {0, "r_fullbright","0"};
56 cvar_t r_wateralpha = {CVAR_SAVE, "r_wateralpha","1"};
57 cvar_t r_dynamic = {CVAR_SAVE, "r_dynamic","1"};
58 cvar_t r_fullbrights = {CVAR_SAVE, "r_fullbrights", "1"};
60 cvar_t gl_fogenable = {0, "gl_fogenable", "0"};
61 cvar_t gl_fogdensity = {0, "gl_fogdensity", "0.25"};
62 cvar_t gl_fogred = {0, "gl_fogred","0.3"};
63 cvar_t gl_foggreen = {0, "gl_foggreen","0.3"};
64 cvar_t gl_fogblue = {0, "gl_fogblue","0.3"};
65 cvar_t gl_fogstart = {0, "gl_fogstart", "0"};
66 cvar_t gl_fogend = {0, "gl_fogend","0"};
68 cvar_t r_textureunits = {0, "r_textureunits", "32"};
70 void R_ModulateColors(float *in, float *out, int verts, float r, float g, float b)
73 for (i = 0;i < verts;i++)
84 void R_FillColors(float *out, int verts, float r, float g, float b, float a)
87 for (i = 0;i < verts;i++)
101 For program optimization
104 qboolean intimerefresh = 0;
105 static void R_TimeRefresh_f (void)
108 float start, stop, time;
111 start = Sys_DoubleTime ();
112 for (i = 0;i < 128;i++)
114 r_refdef.viewangles[0] = 0;
115 r_refdef.viewangles[1] = i/128.0*360.0;
116 r_refdef.viewangles[2] = 0;
120 stop = Sys_DoubleTime ();
123 Con_Printf ("%f seconds (%f fps)\n", time, 128/time);
128 float fog_density, fog_red, fog_green, fog_blue;
130 qboolean oldgl_fogenable;
131 void R_SetupFog(void)
133 if (gamemode == GAME_NEHAHRA)
135 if (gl_fogenable.integer)
137 oldgl_fogenable = true;
138 fog_density = gl_fogdensity.value;
139 fog_red = gl_fogred.value;
140 fog_green = gl_foggreen.value;
141 fog_blue = gl_fogblue.value;
143 else if (oldgl_fogenable)
145 oldgl_fogenable = false;
154 fogcolor[0] = fog_red = bound(0.0f, fog_red , 1.0f);
155 fogcolor[1] = fog_green = bound(0.0f, fog_green, 1.0f);
156 fogcolor[2] = fog_blue = bound(0.0f, fog_blue , 1.0f);
161 fogdensity = -4000.0f / (fog_density * fog_density);
162 // fog color was already set
168 // FIXME: move this to client?
171 if (gamemode == GAME_NEHAHRA)
173 Cvar_Set("gl_fogenable", "0");
174 Cvar_Set("gl_fogdensity", "0.2");
175 Cvar_Set("gl_fogred", "0.3");
176 Cvar_Set("gl_foggreen", "0.3");
177 Cvar_Set("gl_fogblue", "0.3");
179 fog_density = fog_red = fog_green = fog_blue = 0.0f;
182 // FIXME: move this to client?
183 void FOG_registercvars(void)
185 if (gamemode == GAME_NEHAHRA)
187 Cvar_RegisterVariable (&gl_fogenable);
188 Cvar_RegisterVariable (&gl_fogdensity);
189 Cvar_RegisterVariable (&gl_fogred);
190 Cvar_RegisterVariable (&gl_foggreen);
191 Cvar_RegisterVariable (&gl_fogblue);
192 Cvar_RegisterVariable (&gl_fogstart);
193 Cvar_RegisterVariable (&gl_fogend);
197 void gl_main_start(void)
201 void gl_main_shutdown(void)
205 extern void CL_ParseEntityLump(char *entitystring);
206 void gl_main_newmap(void)
208 if (cl.worldmodel && cl.worldmodel->entities)
209 CL_ParseEntityLump(cl.worldmodel->entities);
213 void GL_Main_Init(void)
215 Matrix4x4_CreateIdentity(&r_identitymatrix);
216 // FIXME: move this to client?
218 Cmd_AddCommand ("timerefresh", R_TimeRefresh_f);
219 Cvar_RegisterVariable (&r_drawentities);
220 Cvar_RegisterVariable (&r_drawviewmodel);
221 Cvar_RegisterVariable (&r_speeds);
222 Cvar_RegisterVariable (&r_fullbrights);
223 Cvar_RegisterVariable (&r_wateralpha);
224 Cvar_RegisterVariable (&r_dynamic);
225 Cvar_RegisterVariable (&r_fullbright);
226 Cvar_RegisterVariable (&r_textureunits);
227 if (gamemode == GAME_NEHAHRA)
228 Cvar_SetValue("r_fullbrights", 0);
229 R_RegisterModule("GL_Main", gl_main_start, gl_main_shutdown, gl_main_newmap);
232 vec3_t r_farclip_origin;
233 vec3_t r_farclip_direction;
234 vec_t r_farclip_directiondist;
235 vec_t r_farclip_meshfarclip;
236 int r_farclip_directionbit0;
237 int r_farclip_directionbit1;
238 int r_farclip_directionbit2;
240 // start a farclip measuring session
241 void R_FarClip_Start(vec3_t origin, vec3_t direction, vec_t startfarclip)
243 VectorCopy(origin, r_farclip_origin);
244 VectorCopy(direction, r_farclip_direction);
245 r_farclip_directiondist = DotProduct(r_farclip_origin, r_farclip_direction);
246 r_farclip_directionbit0 = r_farclip_direction[0] < 0;
247 r_farclip_directionbit1 = r_farclip_direction[1] < 0;
248 r_farclip_directionbit2 = r_farclip_direction[2] < 0;
249 r_farclip_meshfarclip = r_farclip_directiondist + startfarclip;
252 // enlarge farclip to accomodate box
253 void R_FarClip_Box(vec3_t mins, vec3_t maxs)
256 d = (r_farclip_directionbit0 ? mins[0] : maxs[0]) * r_farclip_direction[0]
257 + (r_farclip_directionbit1 ? mins[1] : maxs[1]) * r_farclip_direction[1]
258 + (r_farclip_directionbit2 ? mins[2] : maxs[2]) * r_farclip_direction[2];
259 if (r_farclip_meshfarclip < d)
260 r_farclip_meshfarclip = d;
263 // return farclip value
264 float R_FarClip_Finish(void)
266 return r_farclip_meshfarclip - r_farclip_directiondist;
279 extern void R_Textures_Init(void);
280 extern void Mod_RenderInit(void);
281 extern void GL_Draw_Init(void);
282 extern void GL_Main_Init(void);
283 extern void GL_Models_Init(void);
284 extern void R_Sky_Init(void);
285 extern void GL_Surf_Init(void);
286 extern void R_Crosshairs_Init(void);
287 extern void R_Light_Init(void);
288 extern void R_Particles_Init(void);
289 extern void R_Explosion_Init(void);
290 extern void ui_init(void);
291 extern void gl_backend_init(void);
293 void Render_Init(void)
295 R_Modules_Shutdown();
318 extern char *ENGINE_EXTENSIONS;
321 VID_CheckExtensions();
323 // LordHavoc: report supported extensions
324 Con_Printf ("\nengine extensions: %s\n", ENGINE_EXTENSIONS);
326 qglCullFace(GL_FRONT);
327 qglEnable(GL_TEXTURE_2D);
331 //==================================================================================
333 static void R_MarkEntities (void)
337 entity_render_t *ent;
339 ent = &cl_entities[0].render;
340 Matrix4x4_CreateIdentity(&ent->matrix);
341 Matrix4x4_CreateIdentity(&ent->inversematrix);
344 R_FarClip_Box(cl.worldmodel->normalmins, cl.worldmodel->normalmaxs);
346 if (!r_drawentities.integer)
349 for (i = 0;i < r_refdef.numentities;i++)
351 ent = r_refdef.entities[i];
352 Mod_CheckLoaded(ent->model);
354 // move view-relative models to where they should be
355 if (ent->flags & RENDER_VIEWMODEL)
357 // remove flag so it will not be repeated incase RelinkEntities is not called again for a while
358 ent->flags -= RENDER_VIEWMODEL;
360 VectorCopy(ent->origin, v);
361 ent->origin[0] = v[0] * vpn[0] + v[1] * vright[0] + v[2] * vup[0] + r_origin[0];
362 ent->origin[1] = v[0] * vpn[1] + v[1] * vright[1] + v[2] * vup[1] + r_origin[1];
363 ent->origin[2] = v[0] * vpn[2] + v[1] * vright[2] + v[2] * vup[2] + r_origin[2];
365 VectorAdd(ent->angles, r_refdef.viewangles, ent->angles);
368 if (R_CullBox(ent->mins, ent->maxs))
371 ent->visframe = r_framecount;
372 VectorCopy(ent->angles, v);
373 if (!ent->model || ent->model->type != mod_brush)
375 Matrix4x4_CreateFromQuakeEntity(&ent->matrix, ent->origin[0], ent->origin[1], ent->origin[2], v[0], v[1], v[2], ent->scale);
376 Matrix4x4_Invert_Simple(&ent->inversematrix, &ent->matrix);
377 R_LerpAnimation(ent);
378 R_UpdateEntLights(ent);
379 R_FarClip_Box(ent->mins, ent->maxs);
383 // only used if skyrendermasked, and normally returns false
384 int R_DrawBrushModelsSky (void)
387 entity_render_t *ent;
389 if (!r_drawentities.integer)
393 for (i = 0;i < r_refdef.numentities;i++)
395 ent = r_refdef.entities[i];
396 if (ent->visframe == r_framecount && ent->model && ent->model->DrawSky)
398 ent->model->DrawSky(ent);
410 void R_DrawViewModel (void)
412 entity_render_t *ent;
414 // FIXME: move these checks to client
415 if (!r_drawviewmodel.integer || chase_active.integer || envmap || !r_drawentities.integer || cl.items & IT_INVISIBILITY || cl.stats[STAT_HEALTH] <= 0 || !cl.viewent.render.model)
418 ent = &cl.viewent.render;
419 Mod_CheckLoaded(ent->model);
420 R_LerpAnimation(ent);
421 Matrix4x4_CreateFromQuakeEntity(&ent->matrix, ent->origin[0], ent->origin[1], ent->origin[2], -ent->angles[0], ent->angles[1], ent->angles[2], ent->scale);
422 Matrix4x4_Invert_Simple(&ent->inversematrix, &ent->matrix);
423 R_UpdateEntLights(ent);
424 ent->model->Draw(ent);
427 void R_DrawNoModel(entity_render_t *ent);
428 void R_DrawModels (void)
431 entity_render_t *ent;
433 if (!r_drawentities.integer)
437 for (i = 0;i < r_refdef.numentities;i++)
439 ent = r_refdef.entities[i];
440 if (ent->visframe == r_framecount)
444 if (ent->model->Draw)
445 ent->model->Draw(ent);
453 static void R_SetFrustum (void)
457 // LordHavoc: note to all quake engine coders, the special case for 90
458 // degrees assumed a square view (wrong), so I removed it, Quake2 has it
460 // rotate VPN right by FOV_X/2 degrees
461 RotatePointAroundVector( frustum[0].normal, vup, vpn, -(90-r_refdef.fov_x / 2 ) );
462 // rotate VPN left by FOV_X/2 degrees
463 RotatePointAroundVector( frustum[1].normal, vup, vpn, 90-r_refdef.fov_x / 2 );
464 // rotate VPN up by FOV_X/2 degrees
465 RotatePointAroundVector( frustum[2].normal, vright, vpn, 90-r_refdef.fov_y / 2 );
466 // rotate VPN down by FOV_X/2 degrees
467 RotatePointAroundVector( frustum[3].normal, vright, vpn, -( 90 - r_refdef.fov_y / 2 ) );
469 for (i = 0;i < 4;i++)
471 frustum[i].type = PLANE_ANYZ;
472 frustum[i].dist = DotProduct (r_origin, frustum[i].normal);
473 PlaneClassify(&frustum[i]);
482 static void R_SetupFrame (void)
484 // don't allow cheats in multiplayer
485 if (cl.maxclients > 1)
487 if (r_fullbright.integer != 0)
488 Cvar_Set ("r_fullbright", "0");
489 if (r_ambient.value != 0)
490 Cvar_Set ("r_ambient", "0");
495 // build the transformation matrix for the given view angles
496 VectorCopy (r_refdef.vieworg, r_origin);
498 AngleVectors (r_refdef.viewangles, vpn, vright, vup);
504 static void R_BlendView(void)
509 if (r_refdef.viewblend[3] < 0.01f)
512 memset(&m, 0, sizeof(m));
513 m.blendfunc1 = GL_SRC_ALPHA;
514 m.blendfunc2 = GL_ONE_MINUS_SRC_ALPHA;
515 m.wantoverbright = false;
516 m.depthdisable = true; // magic
517 R_Mesh_Matrix(&r_identitymatrix);
520 varray_element[0] = 0;
521 varray_element[1] = 1;
522 varray_element[2] = 2;
523 varray_color[0] = varray_color[4] = varray_color[8] = r_refdef.viewblend[0];
524 varray_color[1] = varray_color[5] = varray_color[9] = r_refdef.viewblend[1];
525 varray_color[2] = varray_color[6] = varray_color[10] = r_refdef.viewblend[2];
526 varray_color[3] = varray_color[7] = varray_color[11] = r_refdef.viewblend[3];
528 varray_vertex[0] = r_origin[0] + vpn[0] * 1.5 - vright[0] * r - vup[0] * r;
529 varray_vertex[1] = r_origin[1] + vpn[1] * 1.5 - vright[1] * r - vup[1] * r;
530 varray_vertex[2] = r_origin[2] + vpn[2] * 1.5 - vright[2] * r - vup[2] * r;
532 varray_vertex[4] = varray_vertex[0] + vup[0] * r;
533 varray_vertex[5] = varray_vertex[1] + vup[1] * r;
534 varray_vertex[6] = varray_vertex[2] + vup[2] * r;
535 varray_vertex[8] = varray_vertex[0] + vright[0] * r;
536 varray_vertex[9] = varray_vertex[1] + vright[1] * r;
537 varray_vertex[10] = varray_vertex[2] + vright[2] * r;
545 r_refdef must be set before the first call
548 void R_RenderView (void)
550 entity_render_t *world;
551 if (!r_refdef.entities/* || !cl.worldmodel*/)
552 return; //Host_Error ("R_RenderView: NULL worldmodel");
554 world = &cl_entities[0].render;
556 // FIXME: move to client
558 R_TimeReport("mexplosion");
566 R_TimeReport("setup");
568 R_FarClip_Start(r_origin, vpn, 768.0f);
570 r_farclip = R_FarClip_Finish() + 256.0f;
571 R_TimeReport("markentity");
573 R_Mesh_Start(r_farclip);
574 R_MeshQueue_BeginScene();
576 if (R_DrawBrushModelsSky())
577 R_TimeReport("bmodelsky");
579 // must occur early because it can draw sky
581 R_TimeReport("world");
583 // don't let sound skip if going slow
584 if (!intimerefresh && !r_speeds.integer)
588 R_TimeReport("models");
591 R_TimeReport("particles");
594 R_TimeReport("explosions");
596 R_MeshQueue_RenderTransparent();
597 R_TimeReport("drawtrans");
600 R_TimeReport("coronas");
603 R_TimeReport("crosshair");
606 R_TimeReport("blendview");
608 R_MeshQueue_Render();
609 R_MeshQueue_EndScene();
611 R_TimeReport("meshfinish");
615 void R_DrawBBoxMesh(vec3_t mins, vec3_t maxs, float cr, float cg, float cb, float ca)
618 float *v, *c, f1, f2, diff[3];
620 m.blendfunc1 = GL_SRC_ALPHA;
621 m.blendfunc2 = GL_ONE_MINUS_SRC_ALPHA;
622 m.wantoverbright = false;
623 R_Mesh_Matrix(&r_identitymatrix);
627 varray_vertex[ 0] = mins[0];varray_vertex[ 1] = mins[1];varray_vertex[ 2] = mins[2];
628 varray_vertex[ 4] = maxs[0];varray_vertex[ 5] = mins[1];varray_vertex[ 6] = mins[2];
629 varray_vertex[ 8] = mins[0];varray_vertex[ 9] = maxs[1];varray_vertex[10] = mins[2];
630 varray_vertex[12] = maxs[0];varray_vertex[13] = maxs[1];varray_vertex[14] = mins[2];
631 varray_vertex[16] = mins[0];varray_vertex[17] = mins[1];varray_vertex[18] = maxs[2];
632 varray_vertex[20] = maxs[0];varray_vertex[21] = mins[1];varray_vertex[22] = maxs[2];
633 varray_vertex[24] = mins[0];varray_vertex[25] = maxs[1];varray_vertex[26] = maxs[2];
634 varray_vertex[28] = maxs[0];varray_vertex[29] = maxs[1];varray_vertex[30] = maxs[2];
635 varray_color[ 0] = varray_color[ 4] = varray_color[ 8] = varray_color[12] = varray_color[16] = varray_color[20] = varray_color[24] = varray_color[28] = cr * mesh_colorscale;
636 varray_color[ 1] = varray_color[ 5] = varray_color[ 9] = varray_color[13] = varray_color[17] = varray_color[21] = varray_color[25] = varray_color[29] = cg * mesh_colorscale;
637 varray_color[ 2] = varray_color[ 6] = varray_color[10] = varray_color[14] = varray_color[18] = varray_color[22] = varray_color[26] = varray_color[30] = cb * mesh_colorscale;
638 varray_color[ 3] = varray_color[ 7] = varray_color[11] = varray_color[15] = varray_color[19] = varray_color[23] = varray_color[27] = varray_color[31] = ca;
641 for (i = 0, v = varray_vertex, c = varray_color;i < 8;i++, v += 4, c += 4)
643 VectorSubtract(v, r_origin, diff);
644 f2 = exp(fogdensity/DotProduct(diff, diff));
646 f2 *= mesh_colorscale;
647 c[0] = c[0] * f1 + fogcolor[0] * f2;
648 c[1] = c[1] * f1 + fogcolor[1] * f2;
649 c[2] = c[2] * f1 + fogcolor[2] * f2;
656 void R_DrawNoModelCallback(const void *calldata1, int calldata2)
658 const entity_render_t *ent = calldata1;
660 float f1, f2, *c, diff[3];
662 memset(&m, 0, sizeof(m));
663 if (ent->flags & EF_ADDITIVE)
665 m.blendfunc1 = GL_SRC_ALPHA;
666 m.blendfunc2 = GL_ONE;
668 else if (ent->alpha < 1)
670 m.blendfunc1 = GL_SRC_ALPHA;
671 m.blendfunc2 = GL_ONE_MINUS_SRC_ALPHA;
675 m.blendfunc1 = GL_ONE;
676 m.blendfunc2 = GL_ZERO;
678 m.wantoverbright = false;
679 R_Mesh_Matrix(&ent->matrix);
682 varray_element[ 0] = 5;varray_element[ 1] = 2;varray_element[ 2] = 0;
683 varray_element[ 3] = 5;varray_element[ 4] = 1;varray_element[ 5] = 2;
684 varray_element[ 6] = 5;varray_element[ 7] = 0;varray_element[ 8] = 3;
685 varray_element[ 9] = 5;varray_element[10] = 3;varray_element[11] = 1;
686 varray_element[12] = 0;varray_element[13] = 2;varray_element[14] = 4;
687 varray_element[15] = 2;varray_element[16] = 1;varray_element[17] = 4;
688 varray_element[18] = 3;varray_element[19] = 0;varray_element[20] = 4;
689 varray_element[21] = 1;varray_element[22] = 3;varray_element[23] = 4;
690 varray_vertex[ 0] = -16;varray_vertex[ 1] = 0;varray_vertex[ 2] = 0;
691 varray_vertex[ 4] = 16;varray_vertex[ 5] = 0;varray_vertex[ 6] = 0;
692 varray_vertex[ 8] = 0;varray_vertex[ 9] = -16;varray_vertex[10] = 0;
693 varray_vertex[12] = 0;varray_vertex[13] = 16;varray_vertex[14] = 0;
694 varray_vertex[16] = 0;varray_vertex[17] = 0;varray_vertex[18] = -16;
695 varray_vertex[20] = 0;varray_vertex[21] = 0;varray_vertex[22] = 16;
696 varray_color[ 0] = 0.00f;varray_color[ 1] = 0.00f;varray_color[ 2] = 0.50f;varray_color[ 3] = ent->alpha;
697 varray_color[ 4] = 0.00f;varray_color[ 5] = 0.00f;varray_color[ 6] = 0.50f;varray_color[ 7] = ent->alpha;
698 varray_color[ 8] = 0.00f;varray_color[ 9] = 0.50f;varray_color[10] = 0.00f;varray_color[11] = ent->alpha;
699 varray_color[12] = 0.00f;varray_color[13] = 0.50f;varray_color[14] = 0.00f;varray_color[15] = ent->alpha;
700 varray_color[16] = 0.50f;varray_color[17] = 0.00f;varray_color[18] = 0.00f;varray_color[19] = ent->alpha;
701 varray_color[20] = 0.50f;varray_color[21] = 0.00f;varray_color[22] = 0.00f;varray_color[23] = ent->alpha;
704 VectorSubtract(ent->origin, r_origin, diff);
705 f2 = exp(fogdensity/DotProduct(diff, diff));
707 for (i = 0, c = varray_color;i < 6;i++, c += 4)
709 c[0] = (c[0] * f1 + fogcolor[0] * f2) * mesh_colorscale;
710 c[1] = (c[1] * f1 + fogcolor[1] * f2) * mesh_colorscale;
711 c[2] = (c[2] * f1 + fogcolor[2] * f2) * mesh_colorscale;
716 for (i = 0, c = varray_color;i < 6;i++, c += 4)
718 c[0] *= mesh_colorscale;
719 c[1] *= mesh_colorscale;
720 c[2] *= mesh_colorscale;
726 void R_DrawNoModel(entity_render_t *ent)
728 //if ((ent->effects & EF_ADDITIVE) || (ent->alpha < 1))
729 R_MeshQueue_AddTransparent(ent->origin, R_DrawNoModelCallback, ent, 0);
731 // R_DrawNoModelCallback(ent, 0);