1/* 2Copyright (C) 1996-1997 Id Software, Inc. 3 4This program is free software; you can redistribute it and/or 5modify it under the terms of the GNU General Public License 6as published by the Free Software Foundation; either version 2 7of the License, or (at your option) any later version. 8 9This program is distributed in the hope that it will be useful, 10but WITHOUT ANY WARRANTY; without even the implied warranty of 11MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. 12 13See the GNU General Public License for more details. 14 15You should have received a copy of the GNU General Public License 16along with this program; if not, write to the Free Software 17Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. 18 19*/ 20#ifndef GLQUAKE 21// r_shared.h: general refresh-related stuff shared between the refresh and the 22// driver 23 24// FIXME: clean up and move into d_iface.h 25 26#ifndef _R_SHARED_H_ 27#define _R_SHARED_H_ 28 29#define MAXVERTS 16 // max points in a surface polygon 30#define MAXWORKINGVERTS (MAXVERTS+4) // max points in an intermediate 31 // polygon (while processing) 32// !!! if this is changed, it must be changed in d_ifacea.h too !!! 33#define MAXHEIGHT 1024 34#define MAXWIDTH 1280 35 36#define INFINITE_DISTANCE 0x10000 // distance that's always guaranteed to 37 // be farther away than anything in 38 // the scene 39 40//=================================================================== 41 42extern void R_DrawLine (polyvert_t *polyvert0, polyvert_t *polyvert1); 43 44extern int cachewidth; 45extern pixel_t *cacheblock; 46extern int screenwidth; 47 48extern float pixelAspect; 49 50extern int r_drawnpolycount; 51 52extern cvar_t r_clearcolor; 53 54extern int sintable[1280]; 55extern int intsintable[1280]; 56 57extern vec3_t vup, base_vup; 58extern vec3_t vpn, base_vpn; 59extern vec3_t vright, base_vright; 60extern entity_t *currententity; 61 62#define NUMSTACKEDGES 2000 63#define MINEDGES NUMSTACKEDGES 64#define NUMSTACKSURFACES 1000 65#define MINSURFACES NUMSTACKSURFACES 66#define MAXSPANS 3000 67 68// !!! if this is changed, it must be changed in asm_draw.h too !!! 69typedef struct espan_s 70{ 71 int u, v, count; 72 struct espan_s *pnext; 73} espan_t; 74 75// FIXME: compress, make a union if that will help 76// insubmodel is only 1, flags is fewer than 32, spanstate could be a byte 77typedef struct surf_s 78{ 79 struct surf_s *next; // active surface stack in r_edge.c 80 struct surf_s *prev; // used in r_edge.c for active surf stack 81 struct espan_s *spans; // pointer to linked list of spans to draw 82 int key; // sorting key (BSP order) 83 int last_u; // set during tracing 84 int spanstate; // 0 = not in span 85 // 1 = in span 86 // -1 = in inverted span (end before 87 // start) 88 int flags; // currentface flags 89 void *data; // associated data like msurface_t 90 entity_t *entity; 91 float nearzi; // nearest 1/z on surface, for mipmapping 92 qboolean insubmodel; 93 float d_ziorigin, d_zistepu, d_zistepv; 94 95 int pad[2]; // to 64 bytes 96} surf_t; 97 98extern surf_t *surfaces, *surface_p, *surf_max; 99 100// surfaces are generated in back to front order by the bsp, so if a surf 101// pointer is greater than another one, it should be drawn in front 102// surfaces[1] is the background, and is used as the active surface stack. 103// surfaces[0] is a dummy, because index 0 is used to indicate no surface 104// attached to an edge_t 105 106//=================================================================== 107 108extern vec3_t sxformaxis[4]; // s axis transformed into viewspace 109extern vec3_t txformaxis[4]; // t axis transformed into viewspac 110 111extern vec3_t modelorg, base_modelorg; 112 113extern float xcenter, ycenter; 114extern float xscale, yscale; 115extern float xscaleinv, yscaleinv; 116extern float xscaleshrink, yscaleshrink; 117 118extern int d_lightstylevalue[256]; // 8.8 frac of base light value 119 120extern void TransformVector (vec3_t in, vec3_t out); 121extern void SetUpForLineScan(fixed8_t startvertu, fixed8_t startvertv, 122 fixed8_t endvertu, fixed8_t endvertv); 123 124extern int r_skymade; 125extern void R_MakeSky (void); 126 127extern int ubasestep, errorterm, erroradjustup, erroradjustdown; 128 129// flags in finalvert_t.flags 130#define ALIAS_LEFT_CLIP 0x0001 131#define ALIAS_TOP_CLIP 0x0002 132#define ALIAS_RIGHT_CLIP 0x0004 133#define ALIAS_BOTTOM_CLIP 0x0008 134#define ALIAS_Z_CLIP 0x0010 135// !!! if this is changed, it must be changed in d_ifacea.h too !!! 136#define ALIAS_ONSEAM 0x0020 // also defined in modelgen.h; 137 // must be kept in sync 138#define ALIAS_XY_CLIP_MASK 0x000F 139 140// !!! if this is changed, it must be changed in asm_draw.h too !!! 141typedef struct edge_s 142{ 143 fixed16_t u; 144 fixed16_t u_step; 145 struct edge_s *prev, *next; 146 unsigned short surfs[2]; 147 struct edge_s *nextremove; 148 float nearzi; 149 medge_t *owner; 150} edge_t; 151 152#endif // _R_SHARED_H_ 153 154#endif // GLQUAKE 155