Trace.java

/*
Copyright (C) 1997-2001 Id Software, Inc.

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.

*/
/* Modifications
   Copyright 2003-2004 Bytonic Software
   Copyright 2010 Google Inc.
*/
package com.googlecode.gwtquake.shared.game;

import com.googlecode.gwtquake.shared.util.Math3D;

//a trace is returned when a box is swept through the world
public class Trace {
	public boolean allsolid; // if true, plane is not valid
	public boolean startsolid; // if true, the initial point was in a solid area
	public float fraction; // time completed, 1.0 = didn't hit anything
	public float[] endpos = { 0, 0, 0 }; // final position
	// memory
	public Plane plane = new Plane(); // surface normal at impact
	// pointer
	public Surface surface; // surface hit
	public int contents; // contents on other side of surface hit
	// pointer
	public Entity ent; // not set by CM_*() functions
	
	public void set(Trace from) {
		allsolid = from.allsolid;
		startsolid = from.allsolid;
		fraction = from.fraction;
		Math3D.VectorCopy(from.endpos, endpos);
		plane.set(from.plane);
		surface = from.surface;
		contents = from.contents;
		ent = from.ent;
	}

	public void clear() {
		allsolid = false;
		startsolid = false;
		fraction = 0;
		Math3D.VectorClear(endpos);
		plane.clear();
		surface = null;
		contents = 0;
		ent = null;
	}
}