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;
74 // total frames in sequence and alternate sequence
76 // direct pointers to each of the frames in the sequences
77 // (indexed as [alternate][frame])
78 struct texture_s *anim_frames[2][10];
79 // set if animated or there is an alternate frame set
80 // (this is an optimization in the renderer)
86 #define SURF_PLANEBACK 2
87 #define SURF_DRAWSKY 4
88 #define SURF_DRAWTURB 0x10
89 #define SURF_LIGHTMAP 0x20
90 #define SURF_DRAWNOALPHA 0x100
91 #define SURF_DRAWFULLBRIGHT 0x200
92 #define SURF_LIGHTBOTHSIDES 0x400
93 #define SURF_CLIPSOLID 0x800 // this polygon can obscure other polygons
109 typedef struct surfvertex_s
113 // offset into lightmap (used by vertex lighting)
115 // texture coordinates
117 // lightmap coordinates
122 // LordHavoc: replaces glpoly, triangle mesh
123 typedef struct surfmesh_s
125 // can be multiple meshs per surface
126 struct surfmesh_s *chain;
129 surfvertex_t *vertex;
134 typedef struct msurface_s
136 // should be drawn if visframe == r_framecount (set by WorldNode functions)
139 // the node plane this is on, backwards if SURF_PLANEBACK flag set
143 struct Cshader_s *shader;
144 struct msurface_s *chain; // shader rendering chain
146 // look up in model->surfedges[], negative numbers are backwards edges
150 short texturemins[2];
154 texture_t *currenttexture; // updated (animated) during early surface processing each frame
156 // index into d_lightstylevalue array, 255 means not used (black)
157 qbyte styles[MAXLIGHTMAPS];
158 // RGB lighting data [numstyles][height][width][3]
160 // stain to apply on lightmap (soot/dirt/blood/whatever)
163 // these fields are generated during model loading
164 // the lightmap texture fragment to use on the surface
165 rtexture_t *lightmaptexture;
166 // the stride when building lightmaps to comply with fragment update
167 int lightmaptexturestride;
168 // mesh for rendering
171 // these are just 3D points defining the outline of the polygon,
172 // no texcoord info (that can be generated from these)
176 // these are regenerated every frame
180 // avoid redundent addition of dlights
182 // only render each surface once
184 // marked when surface is prepared for the frame
187 // these cause lightmap updates if regenerated
188 // values currently used in lightmap
189 unsigned short cached_light[MAXLIGHTMAPS];
190 // if lightmap was lit by dynamic lights, force update on next frame
192 // to cause lightmap to be rerendered when v_overbrightbits changes
193 short cached_lightscalebit;
194 // rerender lightmaps when r_ambient changes
195 float cached_ambient;
199 #define SHADERSTAGE_SKY 0
200 #define SHADERSTAGE_NORMAL 1
201 #define SHADERSTAGE_COUNT 2
203 // change this stuff when real shaders are added
204 typedef struct Cshader_s
206 void (*shaderfunc[SHADERSTAGE_COUNT])(msurface_t *firstsurf);
207 // list of surfaces using this shader (used during surface rendering)
212 extern Cshader_t Cshader_wall_vertex;
213 extern Cshader_t Cshader_wall_lightmap;
214 extern Cshader_t Cshader_wall_fullbright;
215 extern Cshader_t Cshader_water;
216 extern Cshader_t Cshader_sky;
218 // warning: if this is changed, references must be updated in cpu_* assembly files
219 typedef struct mnode_s
222 int contents; // 0, to differentiate from leafs
224 struct mnode_s *parent;
225 struct mportal_s *portals;
227 // for bounding box culling
233 struct mnode_s *children[2];
235 unsigned short firstsurface;
236 unsigned short numsurfaces;
240 typedef struct mleaf_s
243 int contents; // will be a negative contents number
245 struct mnode_s *parent;
246 struct mportal_s *portals;
248 // for bounding box culling
253 int visframe; // visible if current (r_framecount)
254 int worldnodeframe; // used by certain worldnode variants to avoid processing the same leaf twice in a frame
255 int portalmarkid; // used by polygon-through-portals visibility checker
257 // LordHavoc: leaf based dynamic lighting
261 qbyte *compressed_vis;
263 msurface_t **firstmarksurface;
265 qbyte ambient_sound_level[NUM_AMBIENTS];
271 dclipnode_t *clipnodes;
281 typedef struct mportal_s
283 struct mportal_s *next; // the next portal on this leaf
284 mleaf_t *here; // the leaf this portal is on
285 mleaf_t *past; // the leaf through this portal (infront)
289 int visframe; // is this portal visible this frame?
293 typedef struct mlight_s
300 float spotcone; // cosine of spotlight cone angle (or 0 if not a spotlight)
303 int numleafs; // used only for loading calculations, number of leafs this shines on
307 extern rtexture_t *r_notexture;
308 extern texture_t r_notexture_mip;
311 void Mod_LoadBrushModel (struct model_s *mod, void *buffer);
312 void Mod_BrushInit(void);
313 void Mod_FindNonSolidLocation(vec3_t pos, struct model_s *mod);