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)
143 // the node plane this is on, backwards if SURF_PLANEBACK flag set
147 struct Cshader_s *shader;
148 struct msurface_s *chain; // shader rendering chain
150 // look up in model->surfedges[], negative numbers are backwards edges
154 short texturemins[2];
158 texture_t *currenttexture; // updated (animated) during early surface processing each frame
160 // index into d_lightstylevalue array, 255 means not used (black)
161 qbyte styles[MAXLIGHTMAPS];
162 // RGB lighting data [numstyles][height][width][3]
164 // stain to apply on lightmap (soot/dirt/blood/whatever)
167 // these fields are generated during model loading
168 // the lightmap texture fragment to use on the surface
169 rtexture_t *lightmaptexture;
170 // the stride when building lightmaps to comply with fragment update
171 int lightmaptexturestride;
172 // mesh for rendering
175 // these are just 3D points defining the outline of the polygon,
176 // no texcoord info (that can be generated from these)
180 // these are regenerated every frame
184 // avoid redundent addition of dlights
186 // only render each surface once
188 // marked when surface is prepared for the frame
191 // these cause lightmap updates if regenerated
192 // values currently used in lightmap
193 unsigned short cached_light[MAXLIGHTMAPS];
194 // if lightmap was lit by dynamic lights, force update on next frame
196 // to cause lightmap to be rerendered when v_overbrightbits changes
197 short cached_lightscalebit;
198 // rerender lightmaps when r_ambient changes
199 float cached_ambient;
203 #define SHADERSTAGE_SKY 0
204 #define SHADERSTAGE_NORMAL 1
205 #define SHADERSTAGE_COUNT 2
207 // change this stuff when real shaders are added
208 typedef struct Cshader_s
210 void (*shaderfunc[SHADERSTAGE_COUNT])(msurface_t *firstsurf);
211 // list of surfaces using this shader (used during surface rendering)
216 extern Cshader_t Cshader_wall_vertex;
217 extern Cshader_t Cshader_wall_lightmap;
218 extern Cshader_t Cshader_wall_fullbright;
219 extern Cshader_t Cshader_water;
220 extern Cshader_t Cshader_sky;
222 // warning: if this is changed, references must be updated in cpu_* assembly files
223 typedef struct mnode_s
226 int contents; // 0, to differentiate from leafs
228 struct mnode_s *parent;
229 struct mportal_s *portals;
231 // for bounding box culling
237 struct mnode_s *children[2];
239 unsigned short firstsurface;
240 unsigned short numsurfaces;
244 typedef struct mleaf_s
247 int contents; // will be a negative contents number
249 struct mnode_s *parent;
250 struct mportal_s *portals;
252 // for bounding box culling
257 int visframe; // visible if current (r_framecount)
258 int worldnodeframe; // used by certain worldnode variants to avoid processing the same leaf twice in a frame
259 int portalmarkid; // used by polygon-through-portals visibility checker
261 // LordHavoc: leaf based dynamic lighting
265 qbyte *compressed_vis;
267 msurface_t **firstmarksurface;
269 qbyte ambient_sound_level[NUM_AMBIENTS];
275 dclipnode_t *clipnodes;
285 typedef struct mportal_s
287 struct mportal_s *next; // the next portal on this leaf
288 mleaf_t *here; // the leaf this portal is on
289 mleaf_t *past; // the leaf through this portal (infront)
293 int visframe; // is this portal visible this frame?
297 typedef struct mlight_s
304 float spotcone; // cosine of spotlight cone angle (or 0 if not a spotlight)
307 int numleafs; // used only for loading calculations, number of leafs this shines on
311 extern rtexture_t *r_notexture;
312 extern texture_t r_notexture_mip;
315 void Mod_LoadBrushModel (struct model_s *mod, void *buffer);
316 void Mod_BrushInit(void);
317 void Mod_FindNonSolidLocation(vec3_t pos, struct model_s *mod);