/*

	Copyright (C) 2004 Michael Liebscher
	Copyright (C) 2000-2002 by DarkOne the Hacker

	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.

	You should have received a copy of the GNU General Public License
	along with this program; if not, write to the Free Software
	Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA  02111-1307, USA.

*/

/*
 *	wolf_raycast.h:  Wolfenstein3-D ray-casting.
 *	
 *	Author:	Michael Liebscher <johnnycanuck@users.sourceforge.net>
 *	Date:	2004 
 *
 *	Acknowledgement:
 *	Portion of this code was derived from NewWolf, and was originally
 *	written by DarkOne the Hacker. 
 *
 */

/*
	Notes:	
	This module is implemented by wolf_raycast.c

*/

#ifndef __WOLF_RAYCAST_H__
#define __WOLF_RAYCAST_H__

// marks
#define TRACE_MARK_MAP		1	// marks traced area in 'AM_AutoMap.vis' array
// obstacle levels
#define TRACE_SIGHT			2	// player sight
#define TRACE_SIGHT_AI		4	// enemy sight
#define TRACE_BULLET		8	// bullet
#define TRACE_OBJECT		16	// object

#define TRACE_HIT_VERT		32	// vertical wall was hit
#define TRACE_HIT_DOOR		64	// door was hit
#define TRACE_HIT_PWALL		128	// pushwall was hit

typedef struct r_trace_s
{
	int x, y; // origin
	int a;		// trace angle
	int flags;
	W8 (*tile_vis)[ 64 ]; // should point to [ 64 ][ 64 ] array

} r_trace_t;

#define UPPERZCOORD	 0.6f
#define	LOWERZCOORD -0.6f

extern W8 tile_visible[ 64 ][ 64 ]; // can player see this tile?


extern void R_RayCast( placeonplane_t viewport, LevelData_t *lvl );
extern void R_Trace( r_trace_t *trace, LevelData_t *lvl );


#endif /* __WOLF_RAYCAST_H__ */