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package tesseract.objects;
import java.awt.Color;
import javax.media.j3d.*;
import javax.vecmath.*;
import common.CollidableObject;
/**
* Sphere.
* @author ?
*
*/
public class Sphere extends PhysicalObject {
/**
* Default Object color.
*/
private static final Color3f DEFAULT_COLOR = new Color3f(0.7f, 0.7f, 1);
/**
* Default divisions.
*/
private static final int DEFAULT_DIVISIONS = 22;
/**
* User definable color.
*/
private final Color3f myColor;
/**
* radius of sphere.
*/
public float radius;
/**
* Constructor.
* @param theRadius of sphere.
* @param position to start.
*/
public Sphere(final float theRadius, final Vector3f position) {
this(1, theRadius, position, DEFAULT_COLOR.get());
}
/**
* constructor.
* @param mass of object.
* @param theRadius of sphere.
* @param position of sphere.
* @param theColor of sphere.
*/
public Sphere(final float mass, final float theRadius,
final Vector3f position, final Color theColor) {
super(position, mass);
myColor = new Color3f(theColor);
setShape(createShape(DEFAULT_DIVISIONS));
radius = theRadius;
if (inverseMass != 0) {
inverseInertiaTensor.m00 = 2f / 5 / inverseMass
* radius * radius;
inverseInertiaTensor.m11 = inverseInertiaTensor.m00;
inverseInertiaTensor.m22 = inverseInertiaTensor.m00;
inverseInertiaTensor.invert();
}
updateTransformGroup();
}
/**
* createShape.
* @param divisions
* @return node
*/
protected Node createShape(final int divisions) {
Appearance appearance = new Appearance();
Material material = new Material();
material.setDiffuseColor(myColor);
appearance.setMaterial(material);
return new com.sun.j3d.utils.geometry.Sphere(radius,
com.sun.j3d.utils.geometry.Sphere.GENERATE_NORMALS,
divisions, appearance);
}
}
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