r_local.h

Quake 2 Source code for students by Theerthan You can also download from idsoftwares.com

	float                   nearzi;
	medge_t                 *owner;
} edge_t;


/*
====================================================

VARS

====================================================
*/

extern int              d_spanpixcount;
extern int              r_framecount;           // sequence # of current frame since Quake
									//  started
extern float    r_aliasuvscale;         // scale-up factor for screen u and v
									//  on Alias vertices passed to driver
extern qboolean r_dowarp;

extern affinetridesc_t  r_affinetridesc;

extern vec3_t   r_pright, r_pup, r_ppn;

void D_DrawSurfaces (void);
void R_DrawParticle( void );
void D_ViewChanged (void);
void D_WarpScreen (void);
void R_PolysetUpdateTables (void);

extern void *acolormap; // FIXME: should go away

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

// callbacks to Quake

extern drawsurf_t       r_drawsurf;

void R_DrawSurface (void);

extern int              c_surf;

extern byte             r_warpbuffer[WARP_WIDTH * WARP_HEIGHT];




extern float    scale_for_mip;

extern qboolean         d_roverwrapped;
extern surfcache_t      *sc_rover;
extern surfcache_t      *d_initial_rover;

extern float    d_sdivzstepu, d_tdivzstepu, d_zistepu;
extern float    d_sdivzstepv, d_tdivzstepv, d_zistepv;
extern float    d_sdivzorigin, d_tdivzorigin, d_ziorigin;

extern  fixed16_t       sadjust, tadjust;
extern  fixed16_t       bbextents, bbextentt;


void D_DrawSpans16 (espan_t *pspans);
void D_DrawZSpans (espan_t *pspans);
void Turbulent8 (espan_t *pspan);
void NonTurbulent8 (espan_t *pspan);	//PGM

surfcache_t     *D_CacheSurface (msurface_t *surface, int miplevel);

extern int      d_vrectx, d_vrecty, d_vrectright_particle, d_vrectbottom_particle;

extern int      d_pix_min, d_pix_max, d_pix_shift;

extern pixel_t  *d_viewbuffer;
extern short *d_pzbuffer;
extern unsigned int d_zrowbytes, d_zwidth;
extern short    *zspantable[MAXHEIGHT];
extern int      d_scantable[MAXHEIGHT];

extern int              d_minmip;
extern float    d_scalemip[3];

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

extern int              cachewidth;
extern pixel_t  *cacheblock;
extern int              r_screenwidth;

extern int              r_drawnpolycount;

extern int      sintable[1280];
extern int      intsintable[1280];
extern int		blanktable[1280];		// PGM

extern  vec3_t  vup, base_vup;
extern  vec3_t  vpn, base_vpn;
extern  vec3_t  vright, base_vright;

extern  surf_t  *surfaces, *surface_p, *surf_max;

// surfaces are generated in back to front order by the bsp, so if a surf
// pointer is greater than another one, it should be drawn in front
// surfaces[1] is the background, and is used as the active surface stack.
// surfaces[0] is a dummy, because index 0 is used to indicate no surface
//  attached to an edge_t

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

extern vec3_t   sxformaxis[4];  // s axis transformed into viewspace
extern vec3_t   txformaxis[4];  // t axis transformed into viewspac

extern  float   xcenter, ycenter;
extern  float   xscale, yscale;
extern  float   xscaleinv, yscaleinv;
extern  float   xscaleshrink, yscaleshrink;

extern void TransformVector (vec3_t in, vec3_t out);
extern void SetUpForLineScan(fixed8_t startvertu, fixed8_t startvertv,
	fixed8_t endvertu, fixed8_t endvertv);

extern int      ubasestep, errorterm, erroradjustup, erroradjustdown;

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

extern cvar_t   *sw_aliasstats;
extern cvar_t   *sw_clearcolor;
extern cvar_t   *sw_drawflat;
extern cvar_t   *sw_draworder;
extern cvar_t   *sw_maxedges;
extern cvar_t   *sw_maxsurfs;
extern cvar_t   *sw_mipcap;
extern cvar_t   *sw_mipscale;
extern cvar_t   *sw_mode;
extern cvar_t   *sw_reportsurfout;
extern cvar_t   *sw_reportedgeout;
extern cvar_t   *sw_stipplealpha;
extern cvar_t   *sw_surfcacheoverride;
extern cvar_t   *sw_waterwarp;

extern cvar_t   *r_fullbright;
extern cvar_t	*r_lefthand;
extern cvar_t   *r_drawentities;
extern cvar_t   *r_drawworld;
extern cvar_t   *r_dspeeds;
extern cvar_t   *r_lerpmodels;

extern cvar_t   *r_speeds;

extern cvar_t   *r_lightlevel;  //FIXME HACK

extern cvar_t	*vid_fullscreen;
extern	cvar_t	*vid_gamma;


extern  clipplane_t     view_clipplanes[4];
extern int              *pfrustum_indexes[4];


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

void R_RenderWorld (void);

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

extern  mplane_t        screenedge[4];

extern  vec3_t  r_origin;

extern	entity_t	r_worldentity;
extern  model_t         *currentmodel;
extern  entity_t                *currententity;
extern  vec3_t  modelorg;
extern  vec3_t  r_entorigin;

extern  float   verticalFieldOfView;
extern  float   xOrigin, yOrigin;

extern  int             r_visframecount;

extern msurface_t *r_alpha_surfaces;

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

void R_ClearPolyList (void);
void R_DrawPolyList (void);

//
// current entity info
//
extern  qboolean                insubmodel;

void R_DrawAlphaSurfaces( void );

void R_DrawSprite (void);
void R_DrawBeam( entity_t *e );

void R_RenderFace (msurface_t *fa, int clipflags);
void R_RenderBmodelFace (bedge_t *pedges, msurface_t *psurf);
void R_TransformPlane (mplane_t *p, float *normal, float *dist);
void R_TransformFrustum (void);
void R_DrawSurfaceBlock16 (void);
void R_DrawSurfaceBlock8 (void);

#if     id386

void R_DrawSurfaceBlock8_mip0 (void);
void R_DrawSurfaceBlock8_mip1 (void);
void R_DrawSurfaceBlock8_mip2 (void);
void R_DrawSurfaceBlock8_mip3 (void);

#endif

void R_GenSkyTile (void *pdest);
void R_GenSkyTile16 (void *pdest);
void R_Surf8Patch (void);
void R_Surf16Patch (void);
void R_DrawSubmodelPolygons (model_t *pmodel, int clipflags, mnode_t *topnode);
void R_DrawSolidClippedSubmodelPolygons (model_t *pmodel, mnode_t *topnode);

void R_AddPolygonEdges (emitpoint_t *pverts, int numverts, int miplevel);
surf_t *R_GetSurf (void);
void R_AliasDrawModel (void);
void R_BeginEdgeFrame (void);
void R_ScanEdges (void);
void D_DrawSurfaces (void);
void R_InsertNewEdges (edge_t *edgestoadd, edge_t *edgelist);
void R_StepActiveU (edge_t *pedge);
void R_RemoveEdges (edge_t *pedge);
void R_PushDlights (model_t *model);

extern void R_Surf8Start (void);
extern void R_Surf8End (void);
extern void R_Surf16Start (void);
extern void R_Surf16End (void);
extern void R_EdgeCodeStart (void);
extern void R_EdgeCodeEnd (void);

extern void R_RotateBmodel (void);

extern int      c_faceclip;
extern int      r_polycount;
extern int      r_wholepolycount;

extern int                      ubasestep, errorterm, erroradjustup, erroradjustdown;

extern fixed16_t        sadjust, tadjust;
extern fixed16_t        bbextents, bbextentt;

extern mvertex_t        *r_ptverts, *r_ptvertsmax;

extern float                    entity_rotation[3][3];

extern int              r_currentkey;
extern int              r_currentbkey;

void    R_InitTurb (void);

void R_DrawParticles (void);
void R_SurfacePatch (void);

extern int              r_amodels_drawn;
extern edge_t   *auxedges;
extern int              r_numallocatededges;
extern edge_t   *r_edges, *edge_p, *edge_max;

extern  edge_t  *newedges[MAXHEIGHT];
extern  edge_t  *removeedges[MAXHEIGHT];

// FIXME: make stack vars when debugging done
extern  edge_t  edge_head;
extern  edge_t  edge_tail;
extern  edge_t  edge_aftertail;

extern	int	r_aliasblendcolor;

extern float    aliasxscale, aliasyscale, aliasxcenter, aliasycenter;

extern int              r_outofsurfaces;
extern int              r_outofedges;

extern mvertex_t        *r_pcurrentvertbase;
extern int                      r_maxvalidedgeoffset;

typedef struct
{
	finalvert_t *a, *b, *c;
} aliastriangleparms_t;

extern aliastriangleparms_t aliastriangleparms;

void R_DrawTriangle( void );
//void R_DrawTriangle (finalvert_t *index0, finalvert_t *index1, finalvert_t *index2);
void R_AliasClipTriangle (finalvert_t *index0, finalvert_t *index1, finalvert_t *index2);


extern float    r_time1;
extern float	da_time1, da_time2;
extern float	dp_time1, dp_time2, db_time1, db_time2, rw_time1, rw_time2;
extern float	se_time1, se_time2, de_time1, de_time2, dv_time1, dv_time2;
extern int              r_frustum_indexes[4*6];
extern int              r_maxsurfsseen, r_maxedgesseen, r_cnumsurfs;
extern qboolean r_surfsonstack;

extern	mleaf_t		*r_viewleaf;
extern	int			r_viewcluster, r_oldviewcluster;

extern int              r_clipflags;
extern int              r_dlightframecount;
extern qboolean r_fov_greater_than_90;

extern  image_t         *r_notexture_mip;
extern  model_t         *r_worldmodel;

void R_PrintAliasStats (void);
void R_PrintTimes (void);
void R_PrintDSpeeds (void);
void R_AnimateLight (void);
void R_LightPoint (vec3_t p, vec3_t color);
void R_SetupFrame (void);
void R_cshift_f (void);
void R_EmitEdge (mvertex_t *pv0, mvertex_t *pv1);
void R_ClipEdge (mvertex_t *pv0, mvertex_t *pv1, clipplane_t *clip);
void R_SplitEntityOnNode2 (mnode_t *node);

extern  refdef_t        r_newrefdef;

extern  surfcache_t     *sc_rover, *sc_base;

extern  void            *colormap;

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

float R_DLightPoint (vec3_t p);

void R_NewMap (void);
void R_Register (void);
void R_UnRegister (void);
void Draw_InitLocal (void);
qboolean R_Init( void *hInstance, void *wndProc );
void R_Shutdown (void);
void R_InitCaches (void);
void D_FlushCaches (void);

void	R_ScreenShot_f( void );
void    R_BeginRegistration (char *map);
struct model_s  *R_RegisterModel (char *name);
void    R_EndRegistration (void);

void    R_RenderFrame (refdef_t *fd);

struct image_s  *Draw_FindPic (char *name);

void    Draw_GetPicSize (int *w, int *h, char *name);
void    Draw_Pic (int x, int y, char *name);
void    Draw_StretchPic (int x, int y, int w, int h, char *name);
void    Draw_StretchRaw (int x, int y, int w, int h, int cols, int rows, byte *data);
void    Draw_Char (int x, int y, int c);
void    Draw_TileClear (int x, int y, int w, int h, char *name);
void    Draw_Fill (int x, int y, int w, int h, int c);
void    Draw_FadeScreen (void);

void    Draw_GetPalette (void);

void	 R_BeginFrame( float camera_separation );

void	R_CinematicSetPalette( const unsigned char *palette );

extern unsigned d_8to24table[256]; // base

void    Sys_MakeCodeWriteable (unsigned long startaddr, unsigned long length);
void    Sys_SetFPCW (void);

void LoadPCX (char *filename, byte **pic, byte **palette, int *width, int *height);

void    R_InitImages (void);
void	R_ShutdownImages (void);
image_t *R_FindImage (char *name, imagetype_t type);
void    R_FreeUnusedImages (void);

void	R_GammaCorrectAndSetPalette( const unsigned char *pal );

extern mtexinfo_t  *sky_texinfo[6];

void R_InitSkyBox (void);

typedef struct swstate_s
{
	qboolean fullscreen;
	int      prev_mode;				// last valid SW mode

	byte		gammatable[256];
	byte		currentpalette[1024];

} swstate_t;

void R_IMFlatShadedQuad( vec3_t a, vec3_t b, vec3_t c, vec3_t d, int color, float alpha );

extern swstate_t sw_state;

/*
====================================================================

IMPORTED FUNCTIONS

====================================================================
*/

extern  refimport_t     ri;

/*
====================================================================

IMPLEMENTATION FUNCTIONS

====================================================================
*/

void		SWimp_BeginFrame( float camera_separation );
void		SWimp_EndFrame (void);
int			SWimp_Init( void *hInstance, void *wndProc );
void		SWimp_SetPalette( const unsigned char *palette);
void		SWimp_Shutdown( void );
rserr_t		SWimp_SetMode( int *pwidth, int *pheight, int mode, qboolean fullscreen );
void		SWimp_AppActivate( qboolean active );