158 lines
4.8 KiB
C
158 lines
4.8 KiB
C
/*
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Copyright (C) 1996-1997 Id Software, Inc.
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This program is free software; you can redistribute it and/or
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modify it under the terms of the GNU General Public License
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as published by the Free Software Foundation; either version 2
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of the License, or (at your option) any later version.
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This program is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.
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See the GNU General Public License for more details.
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You should have received a copy of the GNU General Public License
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along with this program; if not, write to the Free Software
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Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
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*/
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#ifndef GLQUAKE
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// r_shared.h: general refresh-related stuff shared between the refresh and the
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// driver
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// FIXME: clean up and move into d_iface.h
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#ifndef _R_SHARED_H_
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#define _R_SHARED_H_
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#define MAXVERTS 16 // max points in a surface polygon
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#define MAXWORKINGVERTS (MAXVERTS+4) // max points in an intermediate
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// polygon (while processing)
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// !!! if this is changed, it must be changed in d_ifacea.h too !!!
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#define MAXHEIGHT 1024
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#define MAXWIDTH 1280
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#define MAXDIMENSION ((MAXHEIGHT > MAXWIDTH) ? MAXHEIGHT : MAXWIDTH)
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#define SIN_BUFFER_SIZE (MAXDIMENSION+CYCLE)
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#define INFINITE_DISTANCE 0x10000 // distance that's always guaranteed to
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// be farther away than anything in
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// the scene
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//===================================================================
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extern void R_DrawLine (polyvert_t *polyvert0, polyvert_t *polyvert1);
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extern int cachewidth;
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extern pixel_t *cacheblock;
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extern int screenwidth;
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extern float pixelAspect;
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extern int r_drawnpolycount;
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extern cvar_t r_clearcolor;
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extern int sintable[SIN_BUFFER_SIZE];
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extern int intsintable[SIN_BUFFER_SIZE];
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extern vec3_t vup, base_vup;
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extern vec3_t vpn, base_vpn;
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extern vec3_t vright, base_vright;
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extern entity_t *currententity;
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#define NUMSTACKEDGES 2400
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#define MINEDGES NUMSTACKEDGES
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#define NUMSTACKSURFACES 800
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#define MINSURFACES NUMSTACKSURFACES
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#define MAXSPANS 3000
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// !!! if this is changed, it must be changed in asm_draw.h too !!!
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typedef struct espan_s
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{
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int u, v, count;
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struct espan_s *pnext;
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} espan_t;
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// FIXME: compress, make a union if that will help
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// insubmodel is only 1, flags is fewer than 32, spanstate could be a byte
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typedef struct surf_s
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{
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struct surf_s *next; // active surface stack in r_edge.c
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struct surf_s *prev; // used in r_edge.c for active surf stack
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struct espan_s *spans; // pointer to linked list of spans to draw
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int key; // sorting key (BSP order)
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int last_u; // set during tracing
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int spanstate; // 0 = not in span
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// 1 = in span
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// -1 = in inverted span (end before
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// start)
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int flags; // currentface flags
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void *data; // associated data like msurface_t
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entity_t *entity;
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float nearzi; // nearest 1/z on surface, for mipmapping
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qboolean insubmodel;
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float d_ziorigin, d_zistepu, d_zistepv;
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int pad[2]; // to 64 bytes
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} surf_t;
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extern surf_t *surfaces, *surface_p, *surf_max;
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// surfaces are generated in back to front order by the bsp, so if a surf
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// pointer is greater than another one, it should be drawn in front
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// surfaces[1] is the background, and is used as the active surface stack.
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// surfaces[0] is a dummy, because index 0 is used to indicate no surface
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// attached to an edge_t
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//===================================================================
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extern vec3_t sxformaxis[4]; // s axis transformed into viewspace
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extern vec3_t txformaxis[4]; // t axis transformed into viewspac
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extern vec3_t modelorg, base_modelorg;
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extern float xcenter, ycenter;
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extern float xscale, yscale;
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extern float xscaleinv, yscaleinv;
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extern float xscaleshrink, yscaleshrink;
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extern int d_lightstylevalue[256]; // 8.8 frac of base light value
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extern void TransformVector (vec3_t in, vec3_t out);
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extern void SetUpForLineScan(fixed8_t startvertu, fixed8_t startvertv,
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fixed8_t endvertu, fixed8_t endvertv);
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extern int r_skymade;
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extern void R_MakeSky (void);
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extern int ubasestep, errorterm, erroradjustup, erroradjustdown;
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// flags in finalvert_t.flags
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#define ALIAS_LEFT_CLIP 0x0001
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#define ALIAS_TOP_CLIP 0x0002
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#define ALIAS_RIGHT_CLIP 0x0004
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#define ALIAS_BOTTOM_CLIP 0x0008
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#define ALIAS_Z_CLIP 0x0010
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// !!! if this is changed, it must be changed in d_ifacea.h too !!!
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#define ALIAS_ONSEAM 0x0020 // also defined in modelgen.h;
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// must be kept in sync
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#define ALIAS_XY_CLIP_MASK 0x000F
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// !!! if this is changed, it must be changed in asm_draw.h too !!!
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typedef struct edge_s
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{
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fixed16_t u;
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fixed16_t u_step;
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struct edge_s *prev, *next;
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unsigned short surfs[2];
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struct edge_s *nextremove;
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float nearzi;
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medge_t *owner;
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} edge_t;
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#endif // _R_SHARED_H_
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#endif // GLQUAKE
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