common/r_main.h

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// Emacs style mode select   -*- C++ -*-
//-----------------------------------------------------------------------------
//
// $Id: r_main.h 1856 2010-09-05 03:14:13Z ladna $
//
// Copyright (C) 1993-1996 by id Software, Inc.
// Copyright (C) 2006-2010 by The Odamex Team.
//
// This program is free software; you can redistribute it and/or
// modify it under the terms of the GNU General Public License
// as published by the Free Software Foundation; either version 2
// of the License, or (at your option) any later version.
//
// This program is distributed in the hope that it will be useful,
// but WITHOUT ANY WARRANTY; without even the implied warranty of
// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
// GNU General Public License for more details.
//
// DESCRIPTION:
//      System specific interface stuff.
//
//-----------------------------------------------------------------------------


#ifndef __R_MAIN_H__
#define __R_MAIN_H__

#include "d_player.h"
#include "r_data.h"

// killough 10/98: special mask indicates sky flat comes from sidedef
#define PL_SKYFLAT (0x80000000)

BOOL R_AlignFlat (int linenum, int side, int fc);

//
// POV related.
//
extern fixed_t                  viewcos;
extern fixed_t                  viewsin;

extern int                              viewwidth;
extern int                              viewheight;
extern int                              viewwindowx;
extern int                              viewwindowy;



extern int                              centerx;
extern "C" int                  centery;

extern fixed_t                  centerxfrac;
extern fixed_t                  centeryfrac;
extern fixed_t                  yaspectmul;

extern byte*                    basecolormap;   // [RH] Colormap for sector currently being drawn

extern int                              validcount;

extern int                              linecount;
extern int                              loopcount;

//
// Lighting LUT.
// Used for z-depth cuing per column/row,
//      and other lighting effects (sector ambient, flash).
//

// Lighting constants.
// Now why not 32 levels here?
#define LIGHTLEVELS                     16
#define LIGHTSEGSHIFT                    4

#define MAXLIGHTSCALE                   48
#define LIGHTSCALEMULBITS                8      // [RH] for hires lighting fix
#define LIGHTSCALESHIFT                 (12+LIGHTSCALEMULBITS)
#define MAXLIGHTZ                          128
#define LIGHTZSHIFT                     20

// [RH] Changed from lighttable_t* to int.
extern int                              scalelight[LIGHTLEVELS][MAXLIGHTSCALE];
extern int                              scalelightfixed[MAXLIGHTSCALE];
extern int                              zlight[LIGHTLEVELS][MAXLIGHTZ];

extern int                              extralight;
extern BOOL                             foggy;
extern int                              fixedlightlev;
extern lighttable_t*    fixedcolormap;

extern int                              lightscalexmul; // [RH] for hires lighting fix
extern int                              lightscaleymul;


// Number of diminishing brightness levels.
// There a 0-31, i.e. 32 LUT in the COLORMAP lump.
#define NUMCOLORMAPS                    32


// [RH] New detail modes
extern "C" int                  detailxshift;
extern "C" int                  detailyshift;


//
// Function pointers to switch refresh/drawing functions.
// Used to select shadow mode etc.
//
extern void                     (*colfunc) (void);
extern void                     (*basecolfunc) (void);
extern void                     (*fuzzcolfunc) (void);
extern void                             (*lucentcolfunc) (void);
extern void                             (*transcolfunc) (void);
extern void                             (*tlatedlucentcolfunc) (void);
// No shadow effects on floors.
extern void                     (*spanfunc) (void);

// [RH] Function pointers for the horizontal column drawers.
extern void (*hcolfunc_pre) (void);
extern void (*hcolfunc_post1) (int hx, int sx, int yl, int yh);
extern void (*hcolfunc_post2) (int hx, int sx, int yl, int yh);
extern void (*hcolfunc_post4) (int sx, int yl, int yh);



//
// Utility functions.

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 );

// 2/1/10: Updated (from EE) to restore vanilla style, with tweak for overflow tolerance
angle_t R_PointToAngle2(fixed_t viewx, fixed_t viewy, fixed_t x, fixed_t y);

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 );

fixed_t R_PointToDist2 (fixed_t dx, fixed_t dy);
void R_SetFOV (float fov);
float R_GetFOV (void);

//
// REFRESH - the actual rendering functions.
//

// Called by G_Drawer.
void R_RenderPlayerView (player_t *player);

// Called by startup code.
void R_Init (void);

// Called by exit code.
void R_Shutdown (void);

// Called by M_Responder.
void R_SetViewSize (int blocks);

// [RH] Initialize multires stuff for renderer
void R_MultiresInit (void);

#endif // __R_MAIN_H__