298 lines
8.4 KiB
C
298 lines
8.4 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_things.h
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/// \brief Rendering of moving objects, sprites
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#ifndef __R_THINGS__
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#define __R_THINGS__
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#include "r_plane.h"
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#include "r_patch.h"
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#include "r_picformats.h"
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#include "r_portal.h"
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#include "r_defs.h"
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#include "r_skins.h"
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// --------------
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// SPRITE LOADING
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// --------------
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#define FEETADJUST (4<<FRACBITS) // R_AddSingleSpriteDef
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boolean R_AddSingleSpriteDef(const char *sprname, spritedef_t *spritedef, UINT16 wadnum, UINT16 startlump, UINT16 endlump);
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//faB: find sprites in wadfile, replace existing, add new ones
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// (only sprites from namelist are added or replaced)
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void R_AddSpriteDefs(UINT16 wadnum);
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// ---------------------
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// MASKED COLUMN DRAWING
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// ---------------------
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// vars for R_DrawMaskedColumn
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extern INT16 *mfloorclip;
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extern INT16 *mceilingclip;
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extern fixed_t spryscale;
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extern fixed_t sprtopscreen;
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extern fixed_t sprbotscreen;
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extern fixed_t windowtop;
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extern fixed_t windowbottom;
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extern INT32 lengthcol;
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void R_DrawMaskedColumn(column_t *column);
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void R_DrawFlippedMaskedColumn(column_t *column);
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// ----------------
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// SPRITE RENDERING
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// ----------------
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// Constant arrays used for psprite clipping
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// and initializing clipping.
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extern INT16 negonearray[MAXVIDWIDTH];
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extern INT16 screenheightarray[MAXVIDWIDTH];
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fixed_t R_GetShadowZ(mobj_t *thing, pslope_t **shadowslope);
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//SoM: 6/5/2000: Light sprites correctly!
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void R_AddSprites(sector_t *sec, INT32 lightlevel);
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void R_InitSprites(void);
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void R_ClearSprites(void);
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boolean R_ThingVisible (mobj_t *thing);
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boolean R_ThingVisibleWithinDist (mobj_t *thing,
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fixed_t draw_dist,
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fixed_t nights_draw_dist);
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boolean R_PrecipThingVisible (precipmobj_t *precipthing,
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fixed_t precip_draw_dist);
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boolean R_ThingHorizontallyFlipped (mobj_t *thing);
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boolean R_ThingVerticallyFlipped (mobj_t *thing);
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boolean R_ThingIsPaperSprite (mobj_t *thing);
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boolean R_ThingIsFloorSprite (mobj_t *thing);
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boolean R_ThingIsFullBright (mobj_t *thing);
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boolean R_ThingIsFullDark (mobj_t *thing);
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// --------------
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// MASKED DRAWING
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// --------------
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/** Used to count the amount of masked elements
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* per portal to later group them in separate
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* drawnode lists.
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*/
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typedef struct
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{
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size_t drawsegs[2];
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size_t vissprites[2];
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fixed_t viewx, viewy, viewz; /**< View z stored at the time of the BSP traversal for the view/portal. Masked sorting/drawing needs it. */
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sector_t* viewsector;
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} maskcount_t;
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void R_DrawMasked(maskcount_t* masks, UINT8 nummasks);
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// ----------
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// VISSPRITES
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// ----------
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// number of sprite lumps for spritewidth,offset,topoffset lookup tables
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// Fab: this is a hack : should allocate the lookup tables per sprite
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#define MAXVISSPRITES 2048 // added 2-2-98 was 128
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#define VISSPRITECHUNKBITS 6 // 2^6 = 64 sprites per chunk
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#define VISSPRITESPERCHUNK (1 << VISSPRITECHUNKBITS)
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#define VISSPRITEINDEXMASK (VISSPRITESPERCHUNK - 1)
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typedef enum
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{
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// actual cuts
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SC_NONE = 0,
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SC_TOP = 1,
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SC_BOTTOM = 1<<1,
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// other flags
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SC_PRECIP = 1<<2,
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SC_LINKDRAW = 1<<3,
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SC_FULLBRIGHT = 1<<4,
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SC_FULLDARK = 1<<5,
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SC_VFLIP = 1<<6,
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SC_ISSCALED = 1<<7,
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SC_ISROTATED = 1<<8,
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SC_SHADOW = 1<<9,
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SC_SHEAR = 1<<10,
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SC_SPLAT = 1<<11,
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// masks
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SC_CUTMASK = SC_TOP|SC_BOTTOM,
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SC_FLAGMASK = ~SC_CUTMASK
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} spritecut_e;
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// A vissprite_t is a thing that will be drawn during a refresh,
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// i.e. a sprite object that is partly visible.
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typedef struct vissprite_s
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{
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// Doubly linked list.
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struct vissprite_s *prev;
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struct vissprite_s *next;
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// Bonus linkdraw pointer.
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struct vissprite_s *linkdraw;
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mobj_t *mobj; // for easy access
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INT32 x1, x2;
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fixed_t gx, gy; // for line side calculation
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fixed_t gz, gzt; // global bottom/top for silhouette clipping
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fixed_t pz, pzt; // physical bottom/top for sorting with 3D floors
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fixed_t startfrac; // horizontal position of x1
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fixed_t xscale, scale; // projected horizontal and vertical scales
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fixed_t thingscale; // the object's scale
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fixed_t sortscale; // sortscale only differs from scale for paper sprites, floor sprites, and MF2_LINKDRAW
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fixed_t sortsplat; // the sortscale from behind the floor sprite
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fixed_t scalestep; // only for paper sprites, 0 otherwise
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fixed_t paperoffset, paperdistance; // for paper sprites, offset/dist relative to the angle
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fixed_t xiscale; // negative if flipped
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angle_t centerangle; // for paper sprites
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angle_t viewangle; // for floor sprites, the viewpoint's current angle
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struct {
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fixed_t tan; // The amount to shear the sprite vertically per row
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INT32 offset; // The center of the shearing location offset from x1
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} shear;
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fixed_t texturemid;
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patch_t *patch;
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lighttable_t *colormap; // for color translation and shadow draw
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// maxbright frames as well
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UINT8 *transmap; // for MF2_SHADOW sprites, which translucency table to use
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INT32 mobjflags;
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INT32 heightsec; // height sector for underwater/fake ceiling support
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extracolormap_t *extra_colormap; // global colormaps
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// Precalculated top and bottom screen coords for the sprite.
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fixed_t thingheight; // The actual height of the thing (for 3D floors)
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sector_t *sector; // The sector containing the thing.
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INT16 sz, szt;
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spritecut_e cut;
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UINT32 renderflags;
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UINT8 rotateflags;
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fixed_t spritexscale, spriteyscale;
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fixed_t spritexoffset, spriteyoffset;
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fixed_t shadowscale;
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INT16 clipbot[MAXVIDWIDTH], cliptop[MAXVIDWIDTH];
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INT32 dispoffset; // copy of info->dispoffset, affects ordering but not drawing
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} vissprite_t;
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extern UINT32 visspritecount;
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void R_ClipSprites(drawseg_t* dsstart, portal_t* portal);
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void R_ClipVisSprite(vissprite_t *spr, INT32 x1, INT32 x2, drawseg_t* dsstart, portal_t* portal);
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boolean R_SpriteIsFlashing(vissprite_t *vis);
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UINT8 *R_GetSpriteTranslation(vissprite_t *vis);
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// ----------
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// DRAW NODES
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// ----------
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// A drawnode is something that points to a 3D floor, 3D side, or masked
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// middle texture. This is used for sorting with sprites.
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typedef struct drawnode_s
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{
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visplane_t *plane;
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drawseg_t *seg;
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drawseg_t *thickseg;
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ffloor_t *ffloor;
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vissprite_t *sprite;
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struct drawnode_s *next;
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struct drawnode_s *prev;
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} drawnode_t;
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void R_InitDrawNodes(void);
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// -----------------------
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// SPRITE FRAME CHARACTERS
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// -----------------------
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// Functions to go from sprite character ID to frame number
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// for 2.1 compatibility this still uses the old 'A' + frame code
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// The use of symbols tends to be painful for wad editors though
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// So the future version of this tries to avoid using symbols
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// as much as possible while also defining all 64 slots in a sane manner
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// 2.1: [[ ABCDEFGHIJKLMNOPQRSTUVWXYZ[\]^_`abcdefghijklmnopqrstuvwxyz{|}~ ]]
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// Future: [[ ABCDEFGHIJKLMNOPQRSTUVWXYZ0123456789abcdefghijklmnopqrstuvwxyz!@ ]]
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FUNCMATH FUNCINLINE static ATTRINLINE char R_Frame2Char(UINT8 frame)
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{
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#if 0 // 2.1 compat
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return 'A' + frame;
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#else
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if (frame < 26) return 'A' + frame;
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if (frame < 36) return '0' + (frame - 26);
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if (frame < 62) return 'a' + (frame - 36);
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if (frame == 62) return '!';
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if (frame == 63) return '@';
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return '\xFF';
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#endif
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}
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FUNCMATH FUNCINLINE static ATTRINLINE UINT8 R_Char2Frame(char cn)
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{
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#if 0 // 2.1 compat
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if (cn == '+') return '\\' - 'A'; // PK3 can't use backslash, so use + instead
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return cn - 'A';
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#else
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if (cn >= 'A' && cn <= 'Z') return (cn - 'A');
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if (cn >= '0' && cn <= '9') return (cn - '0') + 26;
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if (cn >= 'a' && cn <= 'z') return (cn - 'a') + 36;
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if (cn == '!') return 62;
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if (cn == '@') return 63;
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return 255;
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#endif
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}
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// "Left" and "Right" character symbols for additional rotation functionality
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#define ROT_L 17
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#define ROT_R 18
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FUNCMATH FUNCINLINE static ATTRINLINE char R_Rotation2Char(UINT8 rot)
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{
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if (rot <= 9) return '0' + rot;
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if (rot <= 16) return 'A' + (rot - 10);
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if (rot == ROT_L) return 'L';
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if (rot == ROT_R) return 'R';
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return '\xFF';
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}
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FUNCMATH FUNCINLINE static ATTRINLINE UINT8 R_Char2Rotation(char cn)
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{
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if (cn >= '0' && cn <= '9') return (cn - '0');
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if (cn >= 'A' && cn <= 'G') return (cn - 'A') + 10;
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if (cn == 'L') return ROT_L;
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if (cn == 'R') return ROT_R;
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return 255;
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}
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#endif //__R_THINGS__
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