128 lines
3.8 KiB
C
128 lines
3.8 KiB
C
// SONIC ROBO BLAST 2
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//-----------------------------------------------------------------------------
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// Copyright (C) 1993-1996 by id Software, Inc.
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// Copyright (C) 1998-2000 by DooM Legacy Team.
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// Copyright (C) 1999-2021 by Sonic Team Junior.
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//
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// This program is free software distributed under the
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// terms of the GNU General Public License, version 2.
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// See the 'LICENSE' file for more details.
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//-----------------------------------------------------------------------------
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/// \file r_plane.h
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/// \brief Refresh, visplane stuff (floor, ceilings)
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#ifndef __R_PLANE__
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#define __R_PLANE__
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#include "screen.h" // needs MAXVIDWIDTH/MAXVIDHEIGHT
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#include "r_data.h"
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#include "r_textures.h"
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#include "p_polyobj.h"
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#define VISPLANEHASHBITS 9
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#define VISPLANEHASHMASK ((1<<VISPLANEHASHBITS)-1)
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// the last visplane list is outside of the hash table and is used for fof planes
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#define MAXVISPLANES ((1<<VISPLANEHASHBITS)+1)
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//
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// Now what is a visplane, anyway?
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// Simple: kinda floor/ceiling polygon optimised for SRB2 rendering.
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//
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typedef struct visplane_s
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{
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struct visplane_s *next;
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fixed_t height;
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fixed_t viewx, viewy, viewz;
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angle_t viewangle;
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angle_t plangle;
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INT32 picnum;
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INT32 lightlevel;
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INT32 minx, maxx;
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// colormaps per sector
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extracolormap_t *extra_colormap;
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// leave pads for [minx-1]/[maxx+1]
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UINT16 padtopstart, top[MAXVIDWIDTH], padtopend;
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UINT16 padbottomstart, bottom[MAXVIDWIDTH], padbottomend;
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INT32 high, low; // R_PlaneBounds should set these.
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fixed_t xoffs, yoffs; // Scrolling flats.
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struct ffloor_s *ffloor;
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polyobj_t *polyobj;
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pslope_t *slope;
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} visplane_t;
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extern visplane_t *visplanes[MAXVISPLANES];
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extern visplane_t *floorplane;
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extern visplane_t *ceilingplane;
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// Visplane related.
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extern INT16 *lastopening, *openings;
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extern size_t maxopenings;
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extern INT16 floorclip[MAXVIDWIDTH], ceilingclip[MAXVIDWIDTH];
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extern fixed_t frontscale[MAXVIDWIDTH], yslopetab[MAXVIDHEIGHT*16];
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extern fixed_t cachedheight[MAXVIDHEIGHT];
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extern fixed_t cacheddistance[MAXVIDHEIGHT];
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extern fixed_t cachedxstep[MAXVIDHEIGHT];
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extern fixed_t cachedystep[MAXVIDHEIGHT];
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extern fixed_t basexscale, baseyscale;
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extern fixed_t *yslope;
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extern lighttable_t **planezlight;
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void R_InitPlanes(void);
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void R_ClearPlanes(void);
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void R_ClearFFloorClips (void);
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void R_MapPlane(INT32 y, INT32 x1, INT32 x2);
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void R_MakeSpans(INT32 x, INT32 t1, INT32 b1, INT32 t2, INT32 b2);
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void R_DrawPlanes(void);
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visplane_t *R_FindPlane(fixed_t height, INT32 picnum, INT32 lightlevel, fixed_t xoff, fixed_t yoff, angle_t plangle,
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extracolormap_t *planecolormap, ffloor_t *ffloor, polyobj_t *polyobj, pslope_t *slope);
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visplane_t *R_CheckPlane(visplane_t *pl, INT32 start, INT32 stop);
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void R_ExpandPlane(visplane_t *pl, INT32 start, INT32 stop);
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void R_PlaneBounds(visplane_t *plane);
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void R_CheckFlatLength(size_t size);
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boolean R_CheckPowersOfTwo(void);
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// Draws a single visplane.
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void R_DrawSinglePlane(visplane_t *pl);
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// Calculates the slope vectors needed for tilted span drawing.
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void R_CalculateSlopeVectors(pslope_t *slope, fixed_t planeviewx, fixed_t planeviewy, fixed_t planeviewz, fixed_t planexscale, fixed_t planeyscale, fixed_t planexoffset, fixed_t planeyoffset, angle_t planeviewangle, angle_t planeangle, float fudge);
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// Sets the slope vector pointers for the current tilted span.
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void R_SetTiltedSpan(INT32 span);
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typedef struct planemgr_s
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{
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visplane_t *plane;
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fixed_t height;
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fixed_t f_pos; // F for Front sector
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fixed_t b_pos; // B for Back sector
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fixed_t f_frac, f_step;
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fixed_t b_frac, b_step;
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INT16 f_clip[MAXVIDWIDTH];
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INT16 c_clip[MAXVIDWIDTH];
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// For slope rendering; the height at the other end
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fixed_t f_pos_slope;
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fixed_t b_pos_slope;
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struct pslope_s *slope;
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struct ffloor_s *ffloor;
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polyobj_t *polyobj;
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} visffloor_t;
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extern visffloor_t ffloor[MAXFFLOORS];
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extern INT32 numffloors;
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void Portal_AddSkyboxPortals (void);
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#endif
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