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 // LordHavoc: replaces glpoly, triangle mesh
112 typedef struct surfmesh_s
114 // can be multiple meshs per surface
115 struct surfmesh_s *chain;
119 int *lightmapoffsets;
127 typedef struct msurface_s
129 // should be drawn if visframe == r_framecount (set by WorldNode functions)
131 // should be drawn if onscreen and not a backface (used for setting visframe)
133 // chain of surfaces marked visible by pvs
134 struct msurface_s *pvschain;
136 // the node plane this is on, backwards if SURF_PLANEBACK flag set
140 struct Cshader_s *shader;
141 struct msurface_s *chain; // shader rendering chain
143 // look up in model->surfedges[], negative numbers are backwards edges
147 short texturemins[2];
151 texture_t *currenttexture; // updated (animated) during early surface processing each frame
153 // index into d_lightstylevalue array, 255 means not used (black)
154 qbyte styles[MAXLIGHTMAPS];
155 // RGB lighting data [numstyles][height][width][3]
157 // stain to apply on lightmap (soot/dirt/blood/whatever)
160 // these fields are generated during model loading
161 // the lightmap texture fragment to use on the surface
162 rtexture_t *lightmaptexture;
163 // the stride when building lightmaps to comply with fragment update
164 int lightmaptexturestride;
165 // mesh for rendering
168 // these are just 3D points defining the outline of the polygon,
169 // no texcoord info (that can be generated from these)
172 // bounding box for onscreen checks, and center for sorting
173 vec3_t poly_mins, poly_maxs, poly_center;
175 // these are regenerated every frame
179 // avoid redundent addition of dlights
181 // only render each surface once
184 // these cause lightmap updates if regenerated
185 // values currently used in lightmap
186 unsigned short cached_light[MAXLIGHTMAPS];
187 // if lightmap was lit by dynamic lights, force update on next frame
189 // to cause lightmap to be rerendered when v_overbrightbits changes
190 short cached_lightscalebit;
191 // rerender lightmaps when r_ambient changes
192 float cached_ambient;
196 #define SHADERSTAGE_SKY 0
197 #define SHADERSTAGE_NORMAL 1
198 #define SHADERSTAGE_COUNT 2
200 struct entity_render_s;
201 // change this stuff when real shaders are added
202 typedef struct Cshader_s
204 void (*shaderfunc[SHADERSTAGE_COUNT])(const struct entity_render_s *ent, const msurface_t *firstsurf);
205 // list of surfaces using this shader (used during surface rendering)
210 extern Cshader_t Cshader_wall_vertex;
211 extern Cshader_t Cshader_wall_lightmap;
212 extern Cshader_t Cshader_wall_fullbright;
213 extern Cshader_t Cshader_water;
214 extern Cshader_t Cshader_sky;
216 // warning: if this is changed, references must be updated in cpu_* assembly files
217 typedef struct mnode_s
220 int contents; // 0, to differentiate from leafs
222 struct mnode_s *parent;
223 struct mportal_s *portals;
225 // for bounding box culling
231 struct mnode_s *children[2];
233 unsigned short firstsurface;
234 unsigned short numsurfaces;
238 typedef struct mleaf_s
241 int contents; // will be a negative contents number
243 struct mnode_s *parent;
244 struct mportal_s *portals;
246 // for bounding box culling
251 int pvsframe; // potentially visible if current (r_pvsframecount)
252 int worldnodeframe; // used by certain worldnode variants to avoid processing the same leaf twice in a frame
253 int portalmarkid; // used by polygon-through-portals visibility checker
255 qbyte *compressed_vis;
257 msurface_t **firstmarksurface;
259 qbyte ambient_sound_level[NUM_AMBIENTS];
265 dclipnode_t *clipnodes;
275 typedef struct mportal_s
277 struct mportal_s *next; // the next portal on this leaf
278 mleaf_t *here; // the leaf this portal is on
279 mleaf_t *past; // the leaf through this portal (infront)
283 int visframe; // is this portal visible this frame?
287 typedef struct mlight_s
294 float spotcone; // cosine of spotlight cone angle (or 0 if not a spotlight)
297 int numleafs; // used only for loading calculations, number of leafs this shines on
301 extern rtexture_t *r_notexture;
302 extern texture_t r_notexture_mip;
305 void Mod_LoadBrushModel (struct model_s *mod, void *buffer);
306 void Mod_BrushInit(void);
308 void Mod_FindNonSolidLocation(vec3_t pos, struct model_s *mod);
309 mleaf_t *Mod_PointInLeaf (const float *p, struct model_s *model);
310 int Mod_PointContents (const float *p, struct model_s *model);
311 qbyte *Mod_LeafPVS (mleaf_t *leaf, struct model_s *model);