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.
25 ==============================================================================
29 ==============================================================================
34 // in memory representation
48 typedef struct mplane_s
52 // for texture axis selection and fast side tests
58 #define SHADERSTAGE_SKY 0
59 #define SHADERSTAGE_NORMAL 1
60 #define SHADERSTAGE_BASELIGHTING 2
61 #define SHADERSTAGE_COUNT 3
63 #define SHADERFLAGS_NEEDLIGHTMAP 1
65 #define SURF_PLANEBACK 2
66 #define SURF_DRAWSKY 4
67 #define SURF_DRAWTURB 0x10
68 #define SURF_LIGHTMAP 0x20
69 #define SURF_DRAWNOALPHA 0x100
70 #define SURF_DRAWFULLBRIGHT 0x200
71 #define SURF_LIGHTBOTHSIDES 0x400
72 #define SURF_CLIPSOLID 0x800 // this polygon can obscure other polygons
73 #define SURF_SHADOWCAST 0x1000 // this polygon can cast stencil shadows
74 #define SURF_SHADOWLIGHT 0x2000 // this polygon can be lit by stencil shadowing
75 #define SURF_WATERALPHA 0x4000 // this polygon's alpha is modulated by r_wateralpha
77 #define SURFRENDER_OPAQUE 0
78 #define SURFRENDER_ALPHA 1
79 #define SURFRENDER_ADD 2
81 struct entity_render_s;
84 // change this stuff when real shaders are added
85 typedef struct Cshader_s
87 void (*shaderfunc[SHADERSTAGE_COUNT])(const struct entity_render_s *ent, const struct texture_s *texture, const struct msurface_s *firstsurf);
92 extern Cshader_t Cshader_wall_lightmap;
93 extern Cshader_t Cshader_water;
94 extern Cshader_t Cshader_sky;
96 typedef struct texture_s
101 unsigned int width, height;
105 // type of rendering (SURFRENDER_ value)
108 // base texture without fullbrights, never NULL
110 // fullbrights texture, NULL if no fullbrights used
111 rtexture_t *glowtexture;
112 // alpha texture (used for fogging), NULL if opaque
113 rtexture_t *fogtexture;
114 // detail texture (usually not used if transparent)
115 rtexture_t *detailtexture;
116 // normalmap for bumpmap shading
117 rtexture_t *nmaptexture;
118 // color filtering for glossy surfaces
119 rtexture_t *glosstexture;
121 // shader to use for this texture
124 // total frames in sequence and alternate sequence
126 // direct pointers to each of the frames in the sequences
127 // (indexed as [alternate][frame])
128 struct texture_s *anim_frames[2][10];
129 // set if animated or there is an alternate frame set
130 // (this is an optimization in the renderer)
132 // the current texture frames in animation
133 // (index with entity frame != 0)
134 struct texture_s *currentframe[2];
152 // LordHavoc: replaces glpoly, triangle mesh
153 typedef struct surfmesh_s
155 // can be multiple meshs per surface
156 struct surfmesh_s *chain;
163 int *lightmapoffsets;
168 int *triangleneighbors;
172 typedef struct msurface_s
174 // surface number, to avoid having to do a divide to find the number of a surface from it's address
176 // should be drawn if visframe == r_framecount (set by PrepareSurfaces)
178 // should be drawn if onscreen and not a backface (used for setting visframe)
180 // chain of surfaces marked visible by pvs
181 //struct msurface_s *pvschain;
183 // the node plane this is on, backwards if SURF_PLANEBACK flag set
188 struct msurface_s *texturechain;
190 // look up in model->surfedges[], negative numbers are backwards edges
194 short texturemins[2];
199 // index into d_lightstylevalue array, 255 means not used (black)
200 qbyte styles[MAXLIGHTMAPS];
201 // RGB lighting data [numstyles][height][width][3]
203 // stain to apply on lightmap (soot/dirt/blood/whatever)
206 // these fields are generated during model loading
207 // the lightmap texture fragment to use on the surface
208 rtexture_t *lightmaptexture;
209 // the stride when building lightmaps to comply with fragment update
210 int lightmaptexturestride;
211 // mesh for rendering
214 // these are just 3D points defining the outline of the polygon,
215 // no texcoord info (that can be generated from these)
218 // bounding box for onscreen checks, and center for sorting
219 vec3_t poly_mins, poly_maxs, poly_center;
220 // bounding sphere radius (around poly_center)
221 float poly_radius, poly_radius2;
223 // neighboring surfaces (one per poly_numverts)
224 struct msurface_s **neighborsurfaces;
226 // these are regenerated every frame
230 // avoid redundent addition of dlights
232 // only render each surface once
233 //int worldnodeframe;
235 // these cause lightmap updates if regenerated
236 // values currently used in lightmap
237 unsigned short cached_light[MAXLIGHTMAPS];
238 // if lightmap was lit by dynamic lights, force update on next frame
240 // to cause lightmap to be rerendered when v_overbrightbits changes
241 short cached_lightmapscalebit;
242 // rerender lightmaps when r_ambient changes
243 float cached_ambient;
247 typedef struct mnode_s
253 struct mnode_s *parent;
254 struct mportal_s *portals;
256 // for bounding box culling
262 struct mnode_s *children[2];
264 unsigned short firstsurface;
265 unsigned short numsurfaces;
269 typedef struct mleaf_s
272 // always negative in leafs
275 struct mnode_s *parent;
276 struct mportal_s *portals;
278 // for bounding box culling
283 // potentially visible if current (r_pvsframecount)
285 // used by certain worldnode variants to avoid processing the same leaf twice in a frame
287 // used by polygon-through-portals visibility checker
290 qbyte *compressed_vis;
292 int *firstmarksurface;
294 qbyte ambient_sound_level[NUM_AMBIENTS];
300 dclipnode_t *clipnodes;
310 typedef struct mportal_s
312 struct mportal_s *next; // the next portal on this leaf
313 mleaf_t *here; // the leaf this portal is on
314 mleaf_t *past; // the leaf through this portal (infront)
318 int visframe; // is this portal visible this frame?
322 typedef struct svbspmesh_s
324 struct svbspmesh_s *next;
325 int numverts, maxverts;
326 int numtriangles, maxtriangles;
332 typedef struct mlight_s
336 // distance attenuation scale (smaller is a larger light)
338 // color and brightness combined
340 // brightness bias, used for limiting radius without a hard edge
342 // spotlight direction
344 // cosine of spotlight cone angle (or 0 if not a spotlight)
346 // distance bias (larger value is softer and darker)
348 // light style controlling this light
350 // maximum extent of the light for shading purposes
352 // maximum extent of the light for culling purposes
355 // surfaces this shines on
357 msurface_t **surfaces;
360 // precomputed shadow volume meshs
361 //svbspmesh_t *shadowvolume;
362 //vec3_t shadowvolumemins, shadowvolumemaxs;
363 shadowmesh_t *shadowvolume;
367 extern rtexture_t *r_notexture;
368 extern texture_t r_notexture_mip;
371 void Mod_LoadBrushModel (struct model_s *mod, void *buffer);
372 void Mod_BrushInit(void);
374 void Mod_FindNonSolidLocation(vec3_t pos, struct model_s *mod);
375 mleaf_t *Mod_PointInLeaf (const float *p, struct model_s *model);
376 int Mod_PointContents (const float *p, struct model_s *model);
377 qbyte *Mod_LeafPVS (mleaf_t *leaf, struct model_s *model);