javax.media.j3d
Class Bounds

java.lang.Object
  |
  +--javax.media.j3d.Bounds

All Implemented Interfaces:

java.lang.Cloneable

Direct Known Subclasses:

BoundingBox, BoundingPolytope, BoundingSphere

public abstract class Bounds

extends java.lang.Object

implements java.lang.Cloneable

The abstract base class for bounds objects. Bounds objects define a convex, closed volume that is used for various intersection and culling operations.

Constructor Summary

Bounds()
Constructs a new Bounds object.

Method Summary

abstract java.lang.Object	clone() Makes a copy of a bounds object.
abstract Bounds	closestIntersection(Bounds[] boundsObjects) Finds closest bounding object that intersects this bounding object.
abstract void	combine(Bounds boundsObject) Combines this bounding object with a bounding object so that the resulting bounding object encloses the original bounding object and the given bounds object.
abstract void	combine(Bounds[] boundsObjects) Combines this bounding object with an array of bounding objects so that the resulting bounding object encloses the original bounding object and the given array of bounds object.
abstract void	combine(Point3d point) Combines this bounding object with a point.
abstract void	combine(Point3d[] points) Combines this bounding object with an array of points.
abstract boolean	equals(java.lang.Object bounds) Indicates whether the specified bounds object is equal to this Bounds object.
abstract int	hashCode() Returns a hash code for this Bounds object based on the data values in this object.
abstract boolean	intersect(Bounds boundsObject) Test for intersection with another bounds object.
abstract boolean	intersect(Bounds[] boundsObjects) Test for intersection with another bounds object.
abstract boolean	intersect(Point3d point) Test for intersection with a point.
abstract boolean	intersect(Point3d origin, Vector3d direction) Test for intersection with a ray.
abstract boolean	isEmpty() Tests whether the bounds is empty.
abstract void	set(Bounds boundsObject) Sets the value of this Bounds object.
abstract void	transform(Bounds bounds, Transform3D trans) Modifies the bounding object so that it bounds the volume generated by transforming the given bounding object.
abstract void	transform(Transform3D trans) Transforms this bounding object by the given matrix.

Methods inherited from class java.lang.Object

finalize, getClass, notify, notifyAll, toString, wait, wait, wait

Constructor Detail

Bounds

public Bounds()

Constructs a new Bounds object.

Method Detail

clone

public abstract java.lang.Object clone()

Makes a copy of a bounds object.

Overrides:

clone in class java.lang.Object

equals

public abstract boolean equals(java.lang.Object bounds)

Indicates whether the specified bounds object is equal to this Bounds object. They are equal if both the specified bounds object and this Bounds are instances of the same Bounds subclass and all of the data members of bounds are equal to the corresponding data members in this Bounds.

Overrides:

equals in class java.lang.Object

Parameters:

bounds - the object with which the comparison is made.

Returns:

true if this Bounds object is equal to bounds; otherwise false

Since:

Java 3D 1.2

hashCode

public abstract int hashCode()

Returns a hash code for this Bounds object based on the data values in this object. Two different Bounds objects of the same type with identical data values (i.e., Bounds.equals returns true) will return the same hash code. Two Bounds objects with different data members may return the same hash code value, although this is not likely.

Overrides:

hashCode in class java.lang.Object

Returns:

a hash code for this Bounds object.

Since:

Java 3D 1.2

intersect

public abstract boolean intersect(Point3d origin,
                                  Vector3d direction)

Test for intersection with a ray.

Parameters:

origin - the starting point of the ray

direction - the direction of the ray

Returns:

true or false indicating if an intersection occured

intersect

public abstract boolean intersect(Point3d point)

Test for intersection with a point.

Parameters:

point - a point defining a position in 3-space

Returns:

true or false indicating if an intersection occured

intersect

public abstract boolean intersect(Bounds boundsObject)

Test for intersection with another bounds object.

Parameters:

boundsObject - another bounds object

Returns:

true or false indicating if an intersection occurred

intersect

public abstract boolean intersect(Bounds[] boundsObjects)

Test for intersection with another bounds object.

Parameters:

boundsObjects - an array of bounding objects

Returns:

true or false indicating if an intersection occured

closestIntersection

public abstract Bounds closestIntersection(Bounds[] boundsObjects)

Finds closest bounding object that intersects this bounding object.

Parameters:

boundsObjects - an array of bounds objects

Returns:

closest bounding object

combine

public abstract void combine(Bounds boundsObject)

Combines this bounding object with a bounding object so that the resulting bounding object encloses the original bounding object and the given bounds object.

Parameters:

boundsObject - another bounds object

combine

public abstract void combine(Bounds[] boundsObjects)

Combines this bounding object with an array of bounding objects so that the resulting bounding object encloses the original bounding object and the given array of bounds object.

Parameters:

boundsObjects - an array of bounds objects

combine

public abstract void combine(Point3d point)

Combines this bounding object with a point.

Parameters:

point - a 3d point in space

combine

public abstract void combine(Point3d[] points)

Combines this bounding object with an array of points.

Parameters:

points - an array of 3d points in space

transform

public abstract void transform(Transform3D trans)

Transforms this bounding object by the given matrix.

Parameters:

trans - the transformation matrix

transform

public abstract void transform(Bounds bounds,
                               Transform3D trans)

Modifies the bounding object so that it bounds the volume generated by transforming the given bounding object.

Parameters:

bounds - the bounding object to be transformed

trans - the transformation matrix

isEmpty

public abstract boolean isEmpty()

Tests whether the bounds is empty. A bounds is empty if it is null (either by construction or as the result of a null intersection) or if its volume is negative. A bounds with a volume of zero is not empty.

Returns:

true if the bounds is empty; otherwise, it returns false

set

public abstract void set(Bounds boundsObject)

Sets the value of this Bounds object.

Parameters:

boundsObject - another bounds object.