cz.cuni.jagrlib
Class BoundingSphere

java.lang.Object
  cz.cuni.jagrlib.BoundingSphere

All Implemented Interfaces:

BoundingVolume

public class BoundingSphere
extends java.lang.Object
implements BoundingVolume

Sphere as simple bounding-volume.

Since:

0.25

See Also:

BoundingSphere.java

Field Summary

protected double[]	center Center of the sphere in cartesian coordinates.
protected double	r Radius of the sphere.
protected double	rr Square of the radius.

Constructor Summary

BoundingSphere(double[] center, double radius)

Method Summary

double	intersection(double[] P0, double[] P1) Ray vs. bounding-volume intersection test with quantitative result.
boolean	intersectsCell(double[] o, double[] size) Rectangular box (AABB) vs. bounding-volume intersection test.
boolean	intersectsRay(double[] P0, double[] P1) Ray vs. bounding-volume intersection test.
boolean	isInside(double[] point) Point vs. bounding-volume test ("inside-test").

Methods inherited from class java.lang.Object

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

Field Detail

center

protected double[] center

Center of the sphere in cartesian coordinates.

r

protected double r

Radius of the sphere.

rr

protected double rr

Square of the radius.

Constructor Detail

BoundingSphere

public BoundingSphere(double[] center,
                      double radius)

Method Detail

intersectsRay

public boolean intersectsRay(double[] P0,
                             double[] P1)

Ray vs. bounding-volume intersection test.

Specified by:

intersectsRay in interface BoundingVolume

Parameters:

P0 - Ray origin (double[3] or double[4]).

P1 - Direction vector of the ray (double[3] or double[4]).

Returns:

true if the ray intersects the bounding-volume.

See Also:

intersection(double[], double[])

intersection

public double intersection(double[] P0,
                           double[] P1)

Ray vs. bounding-volume intersection test with quantitative result.

Specified by:

intersection in interface BoundingVolume

Parameters:

P0 - Ray origin (double[3] or double[4]).

P1 - Direction vector of the ray (double[3] or double[4]).

Returns:

t-parameter >= 0.0 if the ray intersects the bounding-volume, number < 0.0 if no intersection exists.

See Also:

intersectsRay(double[], double[])

intersectsCell

public boolean intersectsCell(double[] o,
                              double[] size)

Rectangular box (AABB) vs. bounding-volume intersection test.

Specified by:

intersectsCell in interface BoundingVolume

Parameters:

o - Coordinate of minimal cell-vertex (double[3]).

size - Box size (double[3]).

Returns:

true if intersection of the cell and the bounding-volume is non-empty.

See Also:

isInside(double[])

isInside

public boolean isInside(double[] point)

Point vs. bounding-volume test ("inside-test").

Specified by:

isInside in interface BoundingVolume

Parameters:

point - Coordinates of the 3D point (double[3] or double[4]).

Returns:

true if the given point lies inside the bounding-volume.

See Also:

intersectsCell(double[], double[])