r_local.h

使用Doom引擎开发的著名游戏《毁灭巫师》的源代码。

typedef struct
{
	int                             numframes;
	spriteframe_t   *spriteframes;
} spritedef_t;

extern  spritedef_t             *sprites;
extern  int                             numsprites;

//=============================================================================

extern  int                     numvertexes;
extern  vertex_t        *vertexes;

extern  int                     numsegs;
extern  seg_t           *segs;

extern  int                     numsectors;
extern  sector_t        *sectors;

extern  int                     numsubsectors;
extern  subsector_t     *subsectors;

extern  int                     numnodes;
extern  node_t          *nodes;

extern  int                     numlines;
extern  line_t          *lines;

extern  int                     numsides;
extern  side_t          *sides;



extern  fixed_t         viewx, viewy, viewz;
extern  angle_t         viewangle;
extern  player_t        *viewplayer;


extern  angle_t         clipangle;

extern  int                     viewangletox[FINEANGLES/2];
extern  angle_t         xtoviewangle[SCREENWIDTH+1];
extern  fixed_t         finetangent[FINEANGLES/2];

extern  fixed_t         rw_distance;
extern  angle_t         rw_normalangle;

//
// R_main.c
//
extern  int                             viewwidth, viewheight, viewwindowx, viewwindowy;
extern  int                             centerx, centery;
extern  int                             flyheight;
extern  fixed_t                 centerxfrac;
extern  fixed_t                 centeryfrac;
extern  fixed_t                 projection;

extern  int                             validcount;

extern  int                             sscount, linecount, loopcount;
extern  lighttable_t    *scalelight[LIGHTLEVELS][MAXLIGHTSCALE];
extern  lighttable_t    *scalelightfixed[MAXLIGHTSCALE];
extern  lighttable_t    *zlight[LIGHTLEVELS][MAXLIGHTZ];

extern  int                             extralight;
extern  lighttable_t    *fixedcolormap;

extern  fixed_t                 viewcos, viewsin;

extern  int                             detailshift;            // 0 = high, 1 = low

extern  void            (*colfunc) (void);
extern  void            (*basecolfunc) (void);
extern  void            (*fuzzcolfunc) (void);
extern  void            (*spanfunc) (void);

int             R_PointOnSide (fixed_t x, fixed_t y, node_t *node);
int             R_PointOnSegSide (fixed_t x, fixed_t y, seg_t *line);
angle_t R_PointToAngle (fixed_t x, fixed_t y);
angle_t R_PointToAngle2 (fixed_t x1, fixed_t y1, fixed_t x2, fixed_t y2);
fixed_t R_PointToDist (fixed_t x, fixed_t y);
fixed_t R_ScaleFromGlobalAngle (angle_t visangle);
subsector_t *R_PointInSubsector (fixed_t x, fixed_t y);
//void R_AddPointToBox (int x, int y, fixed_t *box);


//
// R_bsp.c
//
extern  seg_t           *curline;
extern  side_t  *sidedef;
extern  line_t  *linedef;
extern  sector_t        *frontsector, *backsector;

extern  int     rw_x;
extern  int     rw_stopx;

extern  boolean         segtextured;
extern  boolean         markfloor;              // false if the back side is the same plane
extern  boolean         markceiling;
extern  boolean         skymap;

extern  drawseg_t       drawsegs[MAXDRAWSEGS], *ds_p;

extern  lighttable_t    **hscalelight, **vscalelight, **dscalelight;

typedef void (*drawfunc_t) (int start, int stop);
void R_ClearClipSegs (void);

void R_ClearDrawSegs (void);
void R_InitSkyMap (void);
void R_RenderBSPNode (int bspnum);

//
// R_segs.c
//
extern  int                     rw_angle1;              // angle to line origin
extern int TransTextureStart;
extern int TransTextureEnd;

void R_RenderMaskedSegRange (drawseg_t *ds, int x1, int x2);

//
// R_plane.c
//
typedef void (*planefunction_t) (int top, int bottom);
extern  planefunction_t         floorfunc, ceilingfunc;

extern  int                     skyflatnum;

extern  short                   openings[MAXOPENINGS], *lastopening;

extern  short           floorclip[SCREENWIDTH];
extern  short           ceilingclip[SCREENWIDTH];

extern  fixed_t         yslope[SCREENHEIGHT];
extern  fixed_t         distscale[SCREENWIDTH];

void R_InitPlanes (void);
void R_ClearPlanes (void);
void R_MapPlane (int y, int x1, int x2);
void R_MakeSpans (int x, int t1, int b1, int t2, int b2);
void R_DrawPlanes (void);

visplane_t *R_FindPlane (fixed_t height, int picnum, int lightlevel,
	int special);
visplane_t *R_CheckPlane (visplane_t *pl, int start, int stop);


//
// R_debug.m
//
extern  int     drawbsp;

void RD_OpenMapWindow (void);
void RD_ClearMapWindow (void);
void RD_DisplayLine (int x1, int y1, int x2, int y2, float gray);
void RD_DrawNodeLine (node_t *node);
void RD_DrawLineCheck (seg_t *line);
void RD_DrawLine (seg_t *line);
void RD_DrawBBox (fixed_t *bbox);


//
// R_data.c
//
extern  fixed_t         *textureheight;         // needed for texture pegging
extern  fixed_t         *spritewidth;           // needed for pre rendering (fracs)
extern  fixed_t         *spriteoffset;
extern  fixed_t         *spritetopoffset;
extern  lighttable_t    *colormaps;
extern  int             viewwidth, scaledviewwidth, viewheight;
extern  int                     firstflat;
extern  int                     numflats;

extern  int                     *flattranslation;               // for global animation
extern  int                     *texturetranslation;    // for global animation

extern  int             firstspritelump, lastspritelump, numspritelumps;
extern boolean LevelUseFullBright;

byte    *R_GetColumn (int tex, int col);
void    R_InitData (void);
void R_PrecacheLevel (void);


//
// R_things.c
//
#define MAXVISSPRITES   192

extern  vissprite_t     vissprites[MAXVISSPRITES], *vissprite_p;
extern  vissprite_t     vsprsortedhead;

// constant arrays used for psprite clipping and initializing clipping
extern  short   negonearray[SCREENWIDTH];
extern  short   screenheightarray[SCREENWIDTH];

// vars for R_DrawMaskedColumn
extern  short           *mfloorclip;
extern  short           *mceilingclip;
extern  fixed_t         spryscale;
extern  fixed_t         sprtopscreen;
extern  fixed_t         sprbotscreen;

extern  fixed_t         pspritescale, pspriteiscale;


void R_DrawMaskedColumn (column_t *column, signed int baseclip);


void    R_SortVisSprites (void);

void    R_AddSprites (sector_t *sec);
void    R_AddPSprites (void);
void    R_DrawSprites (void);
void    R_InitSprites (char **namelist);
void    R_ClearSprites (void);
void    R_DrawMasked (void);
void    R_ClipVisSprite (vissprite_t *vis, int xl, int xh);

//=============================================================================
//
// R_draw.c
//
//=============================================================================

extern  lighttable_t    *dc_colormap;
extern  int                             dc_x;
extern  int                             dc_yl;
extern  int                             dc_yh;
extern  fixed_t                 dc_iscale;
extern  fixed_t                 dc_texturemid;
extern  byte                    *dc_source;             // first pixel in a column

void    R_DrawColumn (void);
void    R_DrawColumnLow (void);
void    R_DrawFuzzColumn (void);
void    R_DrawFuzzColumnLow (void);
void    R_DrawTranslatedColumn (void);
void    R_DrawTranslatedFuzzColumn (void);
void    R_DrawTranslatedColumnLow (void);
void 	R_DrawAltFuzzColumn(void);
//void 	R_DrawTranslatedAltFuzzColumn(void);

extern  int                             ds_y;
extern  int                             ds_x1;
extern  int                             ds_x2;
extern  lighttable_t    *ds_colormap;
extern  fixed_t                 ds_xfrac;
extern  fixed_t                 ds_yfrac;
extern  fixed_t                 ds_xstep;
extern  fixed_t                 ds_ystep;
extern  byte                    *ds_source;             // start of a 64*64 tile image

extern  byte    *translationtables;
extern  byte    *dc_translation;

void    R_DrawSpan (void);
void    R_DrawSpanLow (void);

void    R_InitBuffer (int width, int height);
void    R_InitTranslationTables (void);

#endif          // __R_LOCAL__