Class RobustDeterminant

java.lang.Object

org.jzy3d.maths.algorithms.convexhull.algorithms.RobustDeterminant

public class RobustDeterminant
extends Object

Implements an algorithm to compute the sign of a 2x2 determinant for double precision values robustly. It is a direct translation of code developed by Olivier Devillers.

The original code carries the following copyright notice:

Author : Olivier Devillers Olivier.Devillers@sophia.inria.fr http:/www.inria.fr:/prisme/personnel/devillers/anglais/determinant.html

Copyright (c) 1995 by INRIA Prisme Project BP 93 06902 Sophia Antipolis Cedex, France. All rights reserved

Constructor Summary

Constructors

Constructor	Description
RobustDeterminant()

Method Summary

Modifier and Type	Method	Description
static int	signOfDet2x2(double x1, double y1, double x2, double y2)

Methods inherited from class Object

clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

Constructor Details

RobustDeterminant

public RobustDeterminant()

Method Details

signOfDet2x2

public static int signOfDet2x2(double x1,
 double y1,
 double x2,
 double y2)

returns -1 if the determinant is negative, returns 1 if the determinant is positive, retunrs 0 if the determinant is null.