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/*
 * Java port of Bullet (c) 2008 Martin Dvorak 
 *
 * Bullet Continuous Collision Detection and Physics Library
 * Copyright (c) 2003-2008 Erwin Coumans  http://www.bulletphysics.com/
 *
 * This software is provided 'as-is', without any express or implied warranty.
 * In no event will the authors be held liable for any damages arising from
 * the use of this software.
 * 
 * Permission is granted to anyone to use this software for any purpose, 
 * including commercial applications, and to alter it and redistribute it
 * freely, subject to the following restrictions:
 * 
 * 1. The origin of this software must not be misrepresented; you must not
 *    claim that you wrote the original software. If you use this software
 *    in a product, an acknowledgment in the product documentation would be
 *    appreciated but is not required.
 * 2. Altered source versions must be plainly marked as such, and must not be
 *    misrepresented as being the original software.
 * 3. This notice may not be removed or altered from any source distribution.
 */

package com.bulletphysics.collision.narrowphase;

import javax.vecmath.Vector3f;

/**
 * SimplexSolverInterface can incrementally calculate distance between origin and
 * up to 4 vertices. Used by GJK or Linear Casting. Can be implemented by the
 * Johnson-algorithm or alternative approaches based on voronoi regions or barycentric
 * coordinates.
 * 
 * @author jezek2
 */
public abstract class SimplexSolverInterface {

	public abstract void reset();

	public abstract void addVertex(Vector3f w, Vector3f p, Vector3f q);
	
	public abstract boolean closest(Vector3f v);

	public abstract float maxVertex();

	public abstract boolean fullSimplex();

	public abstract int getSimplex(Vector3f[] pBuf, Vector3f[] qBuf, Vector3f[] yBuf);

	public abstract boolean inSimplex(Vector3f w);
	
	public abstract void backup_closest(Vector3f v);

	public abstract boolean emptySimplex();

	public abstract void compute_points(Vector3f p1, Vector3f p2);

	public abstract int numVertices();
	
}