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 int type; // for texture axis selection and fast side tests
53 // LordHavoc: faster than id's signbits system
54 int (*BoxOnPlaneSideFunc) (vec3_t emins, vec3_t emaxs, struct mplane_s *p);
58 typedef struct texture_s
63 unsigned int width, height;
67 // base texture without fullbrights, never NULL
69 // fullbrights texture, NULL if no fullbrights used
70 rtexture_t *glowtexture;
71 // alpha texture (used for fogging), NULL if opaque
72 rtexture_t *fogtexture;
73 // detail texture (usually not used if transparent)
74 rtexture_t *detailtexture;
76 // total frames in sequence and alternate sequence
78 // direct pointers to each of the frames in the sequences
79 // (indexed as [alternate][frame])
80 struct texture_s *anim_frames[2][10];
81 // set if animated or there is an alternate frame set
82 // (this is an optimization in the renderer)
88 #define SURF_PLANEBACK 2
89 #define SURF_DRAWSKY 4
90 #define SURF_DRAWTURB 0x10
91 #define SURF_LIGHTMAP 0x20
92 #define SURF_DRAWNOALPHA 0x100
93 #define SURF_DRAWFULLBRIGHT 0x200
94 #define SURF_LIGHTBOTHSIDES 0x400
95 #define SURF_CLIPSOLID 0x800 // this polygon can obscure other polygons
111 typedef struct surfvertex_s
115 // offset into lightmap (used by vertex lighting)
117 // texture coordinates
119 // lightmap coordinates
121 // detail texture coordinates
126 // LordHavoc: replaces glpoly, triangle mesh
127 typedef struct surfmesh_s
129 // can be multiple meshs per surface
130 struct surfmesh_s *chain;
133 surfvertex_t *vertex;
138 typedef struct msurface_s
140 // should be drawn if visframe == r_framecount (set by WorldNode functions)
142 // should be drawn if onscreen and not a backface (used for setting visframe)
145 // the node plane this is on, backwards if SURF_PLANEBACK flag set
149 struct Cshader_s *shader;
150 struct msurface_s *chain; // shader rendering chain
152 // look up in model->surfedges[], negative numbers are backwards edges
156 short texturemins[2];
160 texture_t *currenttexture; // updated (animated) during early surface processing each frame
162 // index into d_lightstylevalue array, 255 means not used (black)
163 qbyte styles[MAXLIGHTMAPS];
164 // RGB lighting data [numstyles][height][width][3]
166 // stain to apply on lightmap (soot/dirt/blood/whatever)
169 // these fields are generated during model loading
170 // the lightmap texture fragment to use on the surface
171 rtexture_t *lightmaptexture;
172 // the stride when building lightmaps to comply with fragment update
173 int lightmaptexturestride;
174 // mesh for rendering
177 // these are just 3D points defining the outline of the polygon,
178 // no texcoord info (that can be generated from these)
181 // bounding box for onscreen checks, and center for sorting
182 vec3_t poly_mins, poly_maxs, poly_center;
184 // these are regenerated every frame
188 // avoid redundent addition of dlights
190 // only render each surface once
193 // these cause lightmap updates if regenerated
194 // values currently used in lightmap
195 unsigned short cached_light[MAXLIGHTMAPS];
196 // if lightmap was lit by dynamic lights, force update on next frame
198 // to cause lightmap to be rerendered when v_overbrightbits changes
199 short cached_lightscalebit;
200 // rerender lightmaps when r_ambient changes
201 float cached_ambient;
205 #define SHADERSTAGE_SKY 0
206 #define SHADERSTAGE_NORMAL 1
207 #define SHADERSTAGE_COUNT 2
209 struct entity_render_s;
210 // change this stuff when real shaders are added
211 typedef struct Cshader_s
213 void (*shaderfunc[SHADERSTAGE_COUNT])(const struct entity_render_s *ent, const msurface_t *firstsurf);
214 // list of surfaces using this shader (used during surface rendering)
219 extern Cshader_t Cshader_wall_vertex;
220 extern Cshader_t Cshader_wall_lightmap;
221 extern Cshader_t Cshader_wall_fullbright;
222 extern Cshader_t Cshader_water;
223 extern Cshader_t Cshader_sky;
225 // warning: if this is changed, references must be updated in cpu_* assembly files
226 typedef struct mnode_s
229 int contents; // 0, to differentiate from leafs
231 struct mnode_s *parent;
232 struct mportal_s *portals;
234 // for bounding box culling
238 int pvsframe; // potentially visible if current (r_pvsframecount)
242 struct mnode_s *children[2];
244 unsigned short firstsurface;
245 unsigned short numsurfaces;
249 typedef struct mleaf_s
252 int contents; // will be a negative contents number
254 struct mnode_s *parent;
255 struct mportal_s *portals;
257 // for bounding box culling
261 int pvsframe; // potentially visible if current (r_pvsframecount)
264 int visframe; // visible if current (r_framecount)
265 int worldnodeframe; // used by certain worldnode variants to avoid processing the same leaf twice in a frame
266 int portalmarkid; // used by polygon-through-portals visibility checker
268 qbyte *compressed_vis;
270 msurface_t **firstmarksurface;
272 qbyte ambient_sound_level[NUM_AMBIENTS];
278 dclipnode_t *clipnodes;
288 typedef struct mportal_s
290 struct mportal_s *next; // the next portal on this leaf
291 mleaf_t *here; // the leaf this portal is on
292 mleaf_t *past; // the leaf through this portal (infront)
296 int visframe; // is this portal visible this frame?
300 typedef struct mlight_s
307 float spotcone; // cosine of spotlight cone angle (or 0 if not a spotlight)
310 int numleafs; // used only for loading calculations, number of leafs this shines on
314 extern rtexture_t *r_notexture;
315 extern texture_t r_notexture_mip;
318 void Mod_LoadBrushModel (struct model_s *mod, void *buffer);
319 void Mod_BrushInit(void);
321 void Mod_FindNonSolidLocation(vec3_t pos, struct model_s *mod);
322 mleaf_t *Mod_PointInLeaf (const float *p, struct model_s *model);
323 int Mod_PointContents (const float *p, struct model_s *model);
324 qbyte *Mod_LeafPVS (mleaf_t *leaf, struct model_s *model);