220 lines
8.4 KiB
C
220 lines
8.4 KiB
C
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/***************************************************************************/
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/* */
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/* */
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/* Raven 3D Engine */
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/* Copyright (C) 1995 by Softdisk Publishing */
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/* */
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/* Original Design: */
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/* John Carmack of id Software */
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/* */
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/* Enhancements by: */
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/* Robert Morgan of Channel 7............................Main Engine Code */
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/* Todd Lewis of Softdisk Publishing......Tools,Utilities,Special Effects */
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/* John Bianca of Softdisk Publishing..............Low-level Optimization */
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/* Carlos Hasan..........................................Music/Sound Code */
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/* */
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/* */
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/***************************************************************************/
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#ifndef R_REFDEF_H
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#define R_REFDEF_H
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#include "r_public.h"
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#define rint(x) (int)(x+0.5)
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/**** CONSTANTS ****/
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#define TANANGLES 8192 // one quadrant
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#define FINESHIFT 5
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#define MAXVISVERTEXES 1536 // max tile corners visible at once
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// for spans
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#define MAXSPANS 4096
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#define ZSHIFT 12
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#define ZTOFRAC 4 // shift the Z into frac position
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#define ZMASK (0xfffff<<ZSHIFT) // 20 bits
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#define SPANMASK 0x000000fff // 12 bits
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#define MAXPEND 3072
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#define MAXAUTO (16*16)
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/* flags */
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#define F_RIGHT (1<<0)
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#define F_LEFT (1<<1)
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#define F_UP (1<<2)
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#define F_DOWN (1<<3)
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#define F_TRANSPARENT (1<<4)
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#define F_NOCLIP (1<<5)
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#define F_NOBULLETCLIP (1<<6)
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#define F_DAMAGE (1<<7)
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/**** TYPES ****/
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typedef struct
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{
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fixed_t floorheight, ceilingheight;
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fixed_t tx, tz; // transformed x / distance
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int px; // projected x if tz > 0
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int floory, ceilingy;
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} vertex_t;
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typedef struct
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{
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int tilex, tiley, xmin, xmax, mapspot, counter;
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} entry_t;
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typedef enum
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{
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sp_flat, sp_slope, sp_door, sp_shape, sp_maskeddoor,
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sp_transparentwall, sp_step, sp_sky, sp_slopesky, sp_flatsky,
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sp_inviswall
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} spanobj_t;
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typedef struct
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{
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spanobj_t spantype;
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byte *picture;
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void *structure; // either doorobj or scaleobj
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fixed_t x2, y, yh;
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int light, shadow;
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} span_t;
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typedef struct
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{
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short leftoffset, width;
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short collumnofs[256]; // only uses [width] entries
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} scalepic_t;
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typedef struct
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{
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fixed_t tx, ty, tz;
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int px, py;
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} clippoint_t;
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/**** VARIABLES ****/
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extern void (*actionhook)(void);
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extern vertex_t vertexlist[MAXVISVERTEXES], *vertexlist_p;
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extern fixed_t yslope[MAX_VIEW_HEIGHT+MAXSCROLL2], xslope[MAX_VIEW_WIDTH+1];
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extern byte **wallposts;
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extern byte *colormaps;
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extern int numcolormaps;
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extern byte *zcolormap[(MAXZ>>FRACBITS)+1];
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extern fixed_t viewx, viewy, viewz;
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extern fixed_t viewcos, viewsin;
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extern fixed_t xscale, yscale;
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extern int viewangle, viewfineangle;
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extern int viewtilex, viewtiley;
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extern int side;
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extern int walltype;
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extern int wallshadow;
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extern vertex_t *vertex[4]; // points to the for corner vertexes in vert
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extern vertex_t *p1, *p2;
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extern int xclipl, xcliph; // clip window for current tile
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extern int tilex, tiley; // coordinates of the tile being rendered
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extern int mapspot; // tiley*MAPSIZE+tilex
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extern boolean doortile; // true if the tile being renderd has a door
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extern fixed_t tangents[TANANGLES *2];
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extern fixed_t sines[TANANGLES *5];
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extern int backtangents[TANANGLES*2];
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extern fixed_t *cosines; // point 1/4 phase into sines
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extern int pixelangle[MAX_VIEW_WIDTH+1]; // +1 because span ends go one past
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extern fixed_t pixelcosine[MAX_VIEW_WIDTH+1];
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extern int wallpixelangle[MAX_VIEW_WIDTH+1];
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extern fixed_t wallpixelcosine[MAX_VIEW_WIDTH+1];
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extern int campixelangle[MAX_VIEW_WIDTH+1];
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extern fixed_t campixelcosine[MAX_VIEW_WIDTH+1];
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extern fixed_t wallz[MAX_VIEW_WIDTH];
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extern byte *mr_picture; // pointer to a raw 64*64 pixel picture
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extern fixed_t mf_deltaheight;
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extern scaleobj_t firstscaleobj, lastscaleobj;
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extern scaleobj_t scaleobjlist[MAXSPRITES], *freescaleobj_p;
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extern doorobj_t doorlist[MAXDOORS];
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extern int numdoors;
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extern elevobj_t firstelevobj, lastelevobj;
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extern elevobj_t elevlist[MAXELEVATORS], *freeelevobj_p;
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extern spawnarea_t spawnareas[MAXSPAWNAREAS];
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extern int numspawnareas;
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extern int doorxl, doorxh;
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extern byte *sp_dest; // the bottom most pixel to be drawn (in vie
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extern byte *sp_source; // the first pixel in the vertical post (may
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extern byte *sp_colormap; // pointer to a 256 byte color number to pal
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extern long sp_frac; // fixed point location past sp_source
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extern long sp_fracstep; // fixed point step value
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extern int sp_count; // the number of pixels to draw
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extern long sp_loopvalue;
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extern byte *mr_dest; // the left most pixel to be drawn (in viewb
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extern byte *mr_picture; // pointer to a raw 64*64 pixel picture
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extern byte *mr_colormap; // pointer to a 256 byte color number to pal
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extern int mr_xfrac; // starting texture coordinate
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extern int mr_yfrac; // starting texture coordinate
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extern int mr_xstep; // fixed point step value
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extern int mr_ystep; // fixed point step value
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extern int mr_count; // the number of pixels to draw
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extern int mr_shadow;
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extern unsigned spantags[MAXSPANS];
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extern unsigned *starttaglist_p, *endtaglist_p;
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extern span_t spans[MAXSPANS], *spans_p;
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extern int spansx[MAXSPANS];
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extern int numspans;
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extern int wallglow; // wallshadow = 1
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extern int wallglowindex; // counter for wall glow
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extern int wallrotate;
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extern int maplight;
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extern byte *tpwalls_dest[MAXPEND]; // transparentposts
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extern byte *tpwalls_colormap[MAXPEND];
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extern int tpwalls_count[MAXPEND];
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extern int transparentposts;
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extern int autoangle[MAXAUTO*2+1][MAXAUTO*2+1];
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extern int autoangle2[MAXAUTO][MAXAUTO];
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extern int wallflicker1, wallflicker2, wallflicker3, wallcycle, wallflicker4;
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extern int wallflags;
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extern fixed_t afrac, hfrac;
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/**** FUNCTIONS ****/
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void SetupFrame(void);
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vertex_t *TransformVertex(int tilex, int tiley);
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void FlowView();
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void InitWalls(void);
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void RenderTileWalls(entry_t *e);
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void DrawWall(int x1,int x2);
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void DrawSteps(int x1, int x2);
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void InitPlane(void);
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void ClearMapCache(void);
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void RenderTileEnds(void);
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void FindBackVertex(void);
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void RenderDoor(void);
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void RenderSprites();
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void ScalePost(void);
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void ScaleMaskedPost(void);
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void MapRow(void);
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void DrawSpans(void);
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void MS_Error(char *error, ...);
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#pragma aux ScalePost "*" parm [] modify [edi esi ebx];
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#pragma aux ScaleMaskedPost "*" parm [] modify [edi esi ebx];
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#pragma aux MapRow "*" parm [] modify [edi esi ebx];
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#pragma aux sp_dest "*";
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#pragma aux sp_source "*";
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#pragma aux sp_colormap "*";
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#pragma aux sp_frac "*";
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#pragma aux sp_fracstep "*";
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#pragma aux sp_count "*";
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#pragma aux sp_loopvalue "*";
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#pragma aux mr_xfrac "*";
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#pragma aux mr_yfrac "*";
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#pragma aux mr_xstep "*";
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#pragma aux mr_ystep "*";
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#pragma aux mr_count "*";
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#pragma aux mr_picture "*";
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#pragma aux mr_colormap "*";
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#pragma aux mr_dest "*";
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#pragma aux actionhook "*";
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#endif
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