ref: 7110aba73616e4f84b933a0db1ff96c4c22a9d6f
dir: heretic/r_local.h
// R_local.h
#ifndef __R_LOCAL__
#define __R_LOCAL__
#define ANGLETOSKYSHIFT 22 /* sky map is 256*128*4 maps */
#define BASEYCENTER 100
#define MAXWIDTH 1120
#define MAXHEIGHT 832
#define PI 3.141592657
#define CENTERY (SCREENHEIGHT / 2)
#define MINZ (FRACUNIT * 4)
#define FIELDOFVIEW 2048 /* fineangles in the SCREENWIDTH wide window */
/* lighting constants */
#define LIGHTLEVELS 16
#define LIGHTSEGSHIFT 4
#define MAXLIGHTSCALE 48
#define LIGHTSCALESHIFT 12
#define MAXLIGHTZ 128
#define LIGHTZSHIFT 20
#define NUMCOLORMAPS 32 /* number of diminishing */
#define INVERSECOLORMAP 32
/* ------ INTERNAL MAP TYPES ------ */
/* ---- used by play and refresh ---- */
#pragma pack on
typedef struct
{
fixed_t x,y;
} vertex_t;
struct line_s;
typedef struct
{
fixed_t floorheight, ceilingheight;
short floorpic, ceilingpic;
short lightlevel;
short special, tag;
int soundtraversed; /* 0 = untraversed, 1,2 = sndlines -1 */
mobj_t *soundtarget; /* thing that made a sound (or null) */
int blockbox[4]; /* mapblock bounding box for height changes */
degenmobj_t soundorg; /* for any sounds played by the sector */
int validcount; /* if == validcount, already checked */
mobj_t *thinglist; /* list of mobjs in sector */
void *specialdata; /* thinker_t for reversable actions */
int linecount;
struct line_s **lines; /* [linecount] size */
#ifdef RENDER3D
int flatoffx, flatoffy; /* Scrolling flats. */
int skyfix; /* Offset to ceiling height rendering w/sky. */
#endif
} sector_t;
typedef struct
{
fixed_t textureoffset; /* add this to the calculated texture col */
fixed_t rowoffset; /* add this to the calculated texture top */
short toptexture, bottomtexture, midtexture;
sector_t *sector;
} side_t;
typedef enum
{
ST_HORIZONTAL,
ST_VERTICAL,
ST_POSITIVE,
ST_NEGATIVE
} slopetype_t;
typedef struct line_s
{
vertex_t *v1, *v2;
fixed_t dx,dy; // v2 - v1 for side checking
short flags;
short special, tag;
short sidenum[2]; // sidenum[1] will be -1 if one sided
fixed_t bbox[4];
slopetype_t slopetype; // to aid move clipping
sector_t *frontsector, *backsector;
int validcount; // if == validcount, already checked
void *specialdata; // thinker_t for reversable actions
} line_t;
#ifdef RENDER3D
typedef struct
{
float x, y;
} fvertex_t;
#endif
typedef struct subsector_s
{
sector_t *sector;
short numlines;
short firstline;
#ifdef RENDER3D
/* Sorted edge vertices for rendering floors and ceilings. */
char numedgeverts;
fvertex_t *edgeverts; /* A list of edge vertices. */
fvertex_t *origedgeverts; /* Unmodified, accurate edge vertices. */
fvertex_t bbox[2]; /* Min and max points. */
fvertex_t midpoint; /* Center of bounding box. */
#endif
} subsector_t;
typedef struct
{
vertex_t *v1, *v2;
fixed_t offset;
angle_t angle;
side_t *sidedef;
line_t *linedef;
sector_t *frontsector;
sector_t *backsector; /* NULL for one sided lines */
#ifdef RENDER3D
float len; /* Length of the segment (v1 -> v2) for texture mapping. */
#endif
} seg_t;
typedef struct
{
fixed_t x, y, dx, dy; /* partition line */
fixed_t bbox[2][4]; /* bounding box for each child */
unsigned short children[2]; /* if NF_SUBSECTOR its a subsector */
} node_t;
typedef struct
{
int originx; /* block origin (allways UL), which has allready */
int originy; /* accounted for the patch's internal origin */
int patch;
} texpatch_t;
/* a maptexturedef_t describes a rectangular texture, which is composed of one
* or more mappatch_t structures that arrange graphic patches
*/
typedef struct
{
char name[8]; /* for switch changing, etc */
short width;
short height;
short patchcount;
texpatch_t patches[1]; /* [patchcount] drawn back to front */
/* into the cached texture */
#ifdef RENDER3D
boolean masked; /* from maptexture_t */
#endif
} texture_t;
/* ------ OTHER TYPES ------ */
typedef byte lighttable_t; /* this could be wider for >8 bit display */
#define MAXVISPLANES 128
#define MAXOPENINGS (SCREENWIDTH * 64)
typedef struct
{
fixed_t height;
int picnum;
int lightlevel;
int special;
int minx, maxx;
byte pad1; /* leave pads for [minx-1]/[maxx+1] */
byte top[SCREENWIDTH];
byte pad2;
byte pad3;
byte bottom[SCREENWIDTH];
byte pad4;
} visplane_t;
typedef struct drawseg_s
{
seg_t *curline;
int x1, x2;
fixed_t scale1, scale2, scalestep;
int silhouette; /* 0 = none, 1 = bottom, 2 = top, 3 = both */
fixed_t bsilheight; /* don't clip sprites above this */
fixed_t tsilheight; /* don't clip sprites below this */
/* pointers to lists for sprite clipping */
short *sprtopclip; /* adjusted so [x1] is first value */
short *sprbottomclip; /* adjusted so [x1] is first value */
short *maskedtexturecol; /* adjusted so [x1] is first value */
} drawseg_t;
#define SIL_NONE 0
#define SIL_BOTTOM 1
#define SIL_TOP 2
#define SIL_BOTH 3
#define MAXDRAWSEGS 256
/* A vissprite_t is a thing that will be drawn during a refresh */
typedef struct vissprite_s
{
struct vissprite_s *prev, *next;
int x1, x2;
fixed_t gx, gy; /* for line side calculation */
fixed_t gz, gzt; /* global bottom / top for silhouette clipping */
fixed_t startfrac; /* horizontal position of x1 */
fixed_t scale;
fixed_t xiscale; /* negative if flipped */
fixed_t texturemid;
int patch;
#ifdef RENDER3D
int lightlevel;
float v1[2], v2[2]; /* The vertices (v1 is the left one). */
float secfloor, secceil;
#else
lighttable_t *colormap;
#endif
int mobjflags; /* for color translation and shadow draw */
boolean psprite; /* true if psprite */
fixed_t footclip; /* foot clipping */
} vissprite_t;
extern visplane_t *floorplane, *ceilingplane;
/* Sprites are patches with a special naming convention so they can be
* recognized by R_InitSprites. The sprite and frame specified by a
* thing_t is range checked at run time.
* a sprite is a patch_t that is assumed to represent a three dimensional
* object and may have multiple rotations pre drawn. Horizontal flipping
* is used to save space. Some sprites will only have one picture used
* for all views.
*/
typedef struct
{
boolean rotate; /* if false use 0 for any position */
short lump[8]; /* lump to use for view angles 0-7 */
byte flip[8]; /* flip (1 = flip) to use for view angles 0-7 */
} spriteframe_t;
typedef struct
{
int numframes;
spriteframe_t *spriteframes;
} spritedef_t;
extern spritedef_t *sprites;
extern int numsprites;
#pragma pack off
/*============================================================================*/
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;
#ifdef RENDER3D
extern float viewpitch;
extern int sbarscale;
#endif
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 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 */
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_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;
byte *R_GetColumn (int tex, int col);
void R_InitData (void);
void R_PrecacheLevel (void);
/* ---- R_things.c ---- */
#define MAXVISSPRITES 128
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 (const 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);
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__ */