Source to src/r_local.h
//**************************************************************************
//**
//** r_local.h : Heretic 2 : Raven Software, Corp.
//**
//** $RCSfile: r_local.h,v $
//** $Revision: 1.12 $
//** $Date: 96/01/06 18:37:38 $
//** $Author: bgokey $
//**
//**************************************************************************
#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
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)
seqtype_t seqType; // stone, metal, heavy, etc...
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
} 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;
*/
typedef struct line_s
{
vertex_t *v1;
vertex_t *v2;
fixed_t dx;
fixed_t dy;
short flags;
byte special;
byte arg1;
byte arg2;
byte arg3;
byte arg4;
byte arg5;
short sidenum[2];
fixed_t bbox[4];
slopetype_t slopetype;
sector_t *frontsector;
sector_t *backsector;
int validcount;
void *specialdata;
} line_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
} seg_t;
// ===== Polyobj data =====
typedef struct
{
int numsegs;
seg_t **segs;
degenmobj_t startSpot;
vertex_t *originalPts; // used as the base for the rotations
vertex_t *prevPts; // use to restore the old point values
angle_t angle;
int tag; // reference tag assigned in HereticEd
int bbox[4];
int validcount;
boolean crush; // should the polyobj attempt to crush mobjs?
int seqType;
fixed_t size; // polyobj size (area of POLY_AREAUNIT == size of FRACUNIT)
void *specialdata; // pointer a thinker, if the poly is moving
} polyobj_t;
typedef struct polyblock_s
{
polyobj_t *polyobj;
struct polyblock_s *prev;
struct polyblock_s *next;
} polyblock_t;
typedef struct subsector_s
{
sector_t *sector;
short numlines;
short firstline;
polyobj_t *poly;
} subsector_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;
/*
==============================================================================
OTHER TYPES
==============================================================================
*/
typedef byte lighttable_t; // this could be wider for >8 bit display
#define MAXVISPLANES 160
#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;
lighttable_t *colormap;
int mobjflags; // for color translation and shadow draw
boolean psprite; // true if psprite
int class; // player class (used in translation)
fixed_t floorclip;
} 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;
//=============================================================================
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__