/*
** p_trace.h
**
**---------------------------------------------------------------------------
** Copyright 1998-2006 Randy Heit
** All rights reserved.
**
** Redistribution and use in source and binary forms, with or without
** modification, are permitted provided that the following conditions
** are met:
**
** 1. Redistributions of source code must retain the above copyright
**    notice, this list of conditions and the following disclaimer.
** 2. Redistributions in binary form must reproduce the above copyright
**    notice, this list of conditions and the following disclaimer in the
**    documentation and/or other materials provided with the distribution.
** 3. The name of the author may not be used to endorse or promote products
**    derived from this software without specific prior written permission.
**
** THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
** IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
** OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
** IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
** INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
** NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
** DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
** THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
** (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
** THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
**---------------------------------------------------------------------------
**
*/

#ifndef __P_TRACE_H__
#define __P_TRACE_H__

#include "r_defs.h"

enum ETraceResult
{
	TRACE_HitNone,
	TRACE_HitFloor,
	TRACE_HitCeiling,
	TRACE_HitWall,
	TRACE_HitActor
};

enum
{
	TIER_Middle,
	TIER_Upper,
	TIER_Lower
};

struct FTraceResults
{
	sector_t *Sector;
	fixed_t X, Y, Z;
	fixed_t Distance;
	fixed_t Fraction;
	
	AActor *Actor;		// valid if hit an actor

	line_t *Line;		// valid if hit a line
	BYTE Side;
	BYTE Tier;
	ETraceResult HitType;
	sector_t *CrossedWater;
};

enum
{
	TRACE_NoSky			= 1,	// Hitting the sky returns TRACE_HitNone
	TRACE_PCross		= 2,	// Trigger SPAC_PCROSS lines
	TRACE_Impact		= 4,	// Trigger SPAC_IMPACT lines
};

bool Trace (fixed_t x, fixed_t y, fixed_t z, sector_t *sector,
			fixed_t vx, fixed_t vy, fixed_t vz, fixed_t maxDist,
			DWORD ActorMask, DWORD WallMask, AActor *ignore,
			FTraceResults &res,
			DWORD traceFlags=0, bool (*callback)(FTraceResults &res)=NULL);

#endif //__P_TRACE_H__
