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

Doom 3 BFG Edition GPL Source Code
Copyright (C) 1993-2012 id Software LLC, a ZeniMax Media company. 

This file is part of the Doom 3 BFG Edition GPL Source Code ("Doom 3 BFG Edition Source Code").  

Doom 3 BFG Edition Source Code 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 3 of the License, or
(at your option) any later version.

Doom 3 BFG Edition Source Code 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.

You should have received a copy of the GNU General Public License
along with Doom 3 BFG Edition Source Code.  If not, see <http://www.gnu.org/licenses/>.

In addition, the Doom 3 BFG Edition Source Code is also subject to certain additional terms. You should have received a copy of these additional terms immediately following the terms and conditions of the GNU General Public License which accompanied the Doom 3 BFG Edition Source Code.  If not, please request a copy in writing from id Software at the address below.

If you have questions concerning this license or the applicable additional terms, you may contact in writing id Software LLC, c/o ZeniMax Media Inc., Suite 120, Rockville, Maryland 20850 USA.

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

#ifndef __R_PLANE__
#define __R_PLANE__


#include "r_data.h"

#ifdef __GNUG__
#pragma interface
#endif


// Visplane related.
extern  short*		lastopening;


typedef void (*planefunction_t) (int top, int bottom);

extern planefunction_t	floorfunc;
extern planefunction_t	ceilingfunc_t;

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 );

visplane_t*
R_CheckPlane
( visplane_t*	pl,
  int		start,
  int		stop );



#endif