gov.nasa.worldwind.geom

Class BarycentricQuadrilateral

java.lang.Object

gov.nasa.worldwind.geom.BarycentricTriangle

gov.nasa.worldwind.geom.BarycentricQuadrilateral

All Implemented Interfaces:

BarycentricPlanarShape

public class BarycentricQuadrilateral
extends BarycentricTriangle

See http://www.cs.kuleuven.be/~ares/Publications/LagaeDutre2005AnEfficientRayQuadrilateralIntersectionTest/paper.pdf for a description of the calculations used to compute barycentric and bilinear coordinates.

Field Summary

Fields

Modifier and Type	Field and Description
protected Vec4	p11

Fields inherited from class gov.nasa.worldwind.geom.BarycentricTriangle

p00, p01, p10, q1, q3

Constructor Summary

Constructors

Constructor and Description
BarycentricQuadrilateral(LatLon p00, LatLon p10, LatLon p11, LatLon p01)
BarycentricQuadrilateral(Point p00, Point p10, Point p11, Point p01)
BarycentricQuadrilateral(Vec4 p00, Vec4 p10, Vec4 p11, Vec4 p01)

Method Summary

Modifier and Type	Method and Description
boolean	contains(Vec4 p)
double[]	getBilinearCoords(double alpha, double beta)
double[]	getBilinearCoords(Vec4 point)
Vec4	getP11()
double[]	invertBilinear(Vec4 U)
static double[]	invertBilinear(Vec4 U, Vec4 X, Vec4 Y, Vec4 Z, Vec4 W)
static void	main(String[] args)

Methods inherited from class gov.nasa.worldwind.geom.BarycentricTriangle

getBarycentricCoords, getBarycentricCoords, getLocation, getP00, getP01, getP10, getPoint

Methods inherited from class java.lang.Object

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

Field Detail

p11

protected Vec4 p11

Constructor Detail

BarycentricQuadrilateral

public BarycentricQuadrilateral(LatLon p00,
                                LatLon p10,
                                LatLon p11,
                                LatLon p01)

BarycentricQuadrilateral

public BarycentricQuadrilateral(Point p00,
                                Point p10,
                                Point p11,
                                Point p01)

BarycentricQuadrilateral

public BarycentricQuadrilateral(Vec4 p00,
                                Vec4 p10,
                                Vec4 p11,
                                Vec4 p01)

Method Detail

contains

public boolean contains(Vec4 p)

Overrides:

contains in class BarycentricTriangle

getBilinearCoords

public double[] getBilinearCoords(double alpha,
                                  double beta)

Specified by:

getBilinearCoords in interface BarycentricPlanarShape

Overrides:

getBilinearCoords in class BarycentricTriangle

getBilinearCoords

public double[] getBilinearCoords(Vec4 point)

getP11

public Vec4 getP11()

invertBilinear

public double[] invertBilinear(Vec4 U)

invertBilinear

public static double[] invertBilinear(Vec4 U,
                                      Vec4 X,
                                      Vec4 Y,
                                      Vec4 Z,
                                      Vec4 W)

main

public static void main(String[] args)