1 /* 2 Copyright (C) 1996-1997 Id Software, Inc. 3 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. 8 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. 12 13 See the GNU General Public License for more details. 14 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. 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 #define MAXDIMENSION ((MAXHEIGHT > MAXWIDTH) ? MAXHEIGHT : MAXWIDTH) 36 37 #define SIN_BUFFER_SIZE (MAXDIMENSION+CYCLE) 38 39 #define INFINITE_DISTANCE 0x10000 // distance that's always guaranteed to 40 // be farther away than anything in 41 // the scene 42 43 //=================================================================== 44 45 extern void R_DrawLine (polyvert_t *polyvert0, polyvert_t *polyvert1); 46 47 extern int cachewidth; 48 extern pixel_t *cacheblock; 49 extern int screenwidth; 50 51 extern float pixelAspect; 52 53 extern int r_drawnpolycount; 54 55 extern cvar_t r_clearcolor; 56 57 extern int sintable[SIN_BUFFER_SIZE]; 58 extern int intsintable[SIN_BUFFER_SIZE]; 59 60 extern vec3_t vup, base_vup; 61 extern vec3_t vpn, base_vpn; 62 extern vec3_t vright, base_vright; 63 extern entity_t *currententity; 64 65 #define NUMSTACKEDGES 2400 66 #define MINEDGES NUMSTACKEDGES 67 #define NUMSTACKSURFACES 800 68 #define MINSURFACES NUMSTACKSURFACES 69 #define MAXSPANS 3000 70 71 // !!! if this is changed, it must be changed in asm_draw.h too !!! 72 typedef struct espan_s 73 { 74 int u, v, count; 75 struct espan_s *pnext; 76 } espan_t; 77 78 // FIXME: compress, make a union if that will help 79 // insubmodel is only 1, flags is fewer than 32, spanstate could be a byte 80 typedef struct surf_s 81 { 82 struct surf_s *next; // active surface stack in r_edge.c 83 struct surf_s *prev; // used in r_edge.c for active surf stack 84 struct espan_s *spans; // pointer to linked list of spans to draw 85 int key; // sorting key (BSP order) 86 int last_u; // set during tracing 87 int spanstate; // 0 = not in span 88 // 1 = in span 89 // -1 = in inverted span (end before 90 // start) 91 int flags; // currentface flags 92 void *data; // associated data like msurface_t 93 entity_t *entity; 94 float nearzi; // nearest 1/z on surface, for mipmapping 95 qboolean insubmodel; 96 float d_ziorigin, d_zistepu, d_zistepv; 97 98 int pad[2]; // to 64 bytes 99 } surf_t; 100 101 extern surf_t *surfaces, *surface_p, *surf_max; 102 103 // surfaces are generated in back to front order by the bsp, so if a surf 104 // pointer is greater than another one, it should be drawn in front 105 // surfaces[1] is the background, and is used as the active surface stack. 106 // surfaces[0] is a dummy, because index 0 is used to indicate no surface 107 // attached to an edge_t 108 109 //=================================================================== 110 111 extern vec3_t sxformaxis[4]; // s axis transformed into viewspace 112 extern vec3_t txformaxis[4]; // t axis transformed into viewspac 113 114 extern vec3_t modelorg, base_modelorg; 115 116 extern float xcenter, ycenter; 117 extern float xscale, yscale; 118 extern float xscaleinv, yscaleinv; 119 extern float xscaleshrink, yscaleshrink; 120 121 extern int d_lightstylevalue[256]; // 8.8 frac of base light value 122 123 extern void TransformVector (vec3_t in, vec3_t out); 124 extern void SetUpForLineScan(fixed8_t startvertu, fixed8_t startvertv, 125 fixed8_t endvertu, fixed8_t endvertv); 126 127 extern int r_skymade; 128 extern void R_MakeSky (void); 129 130 extern int ubasestep, errorterm, erroradjustup, erroradjustdown; 131 132 // flags in finalvert_t.flags 133 #define ALIAS_LEFT_CLIP 0x0001 134 #define ALIAS_TOP_CLIP 0x0002 135 #define ALIAS_RIGHT_CLIP 0x0004 136 #define ALIAS_BOTTOM_CLIP 0x0008 137 #define ALIAS_Z_CLIP 0x0010 138 // !!! if this is changed, it must be changed in d_ifacea.h too !!! 139 #define ALIAS_ONSEAM 0x0020 // also defined in modelgen.h; 140 // must be kept in sync 141 #define ALIAS_XY_CLIP_MASK 0x000F 142 143 // !!! if this is changed, it must be changed in asm_draw.h too !!! 144 typedef struct edge_s 145 { 146 fixed16_t u; 147 fixed16_t u_step; 148 struct edge_s *prev, *next; 149 unsigned short surfs[2]; 150 struct edge_s *nextremove; 151 float nearzi; 152 medge_t *owner; 153 } edge_t; 154 155 #endif // _R_SHARED_H_ 156 157 #endif // GLQUAKE 158