com.sun.j3d.utils.universe

Class MultiTransformGroup

java.lang.Object

com.sun.j3d.utils.universe.MultiTransformGroup

public class MultiTransformGroup
extends Object

A convenience class that effectively creates a series of TransformGroup nodes connected one to another hierarchically. For most applications, creating a MultiTransformGroup containing one transform will suffice. More sophisticated applications that use a complex portal/head tracking viewing system may find that more transforms are needed.

When more than one transform is needed, transform[0] is considered the "top most" transform with repsect to the scene graph, (attached to the ViewingPlatform node) and transform[numTransforms - 1] is the "bottom most" transform (the ViewPlatorm object is attached to this transform).

Constructor Summary

Constructors

Constructor and Description
MultiTransformGroup() Creates a MultiTransformGroup node that contains a single transform.
MultiTransformGroup(int numTransforms) Creates a MultiTransformGroup node that contains the specified number of transforms.

Method Summary

Methods

Modifier and Type	Method and Description
int	getNumTransforms() Returns the number of transforms in this MultiTransformGroup object.
javax.media.j3d.TransformGroup	getTransformGroup(int transform) Returns the selected TransformGroup node.

Methods inherited from class java.lang.Object

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

Constructor Detail

MultiTransformGroup

public MultiTransformGroup()

Creates a MultiTransformGroup node that contains a single transform. This is effectively equivalent to creating a single TransformGroup node.

MultiTransformGroup

public MultiTransformGroup(int numTransforms)

Creates a MultiTransformGroup node that contains the specified number of transforms.

When more than one transform is needed, transform[0] is considered the "top most" transform with repsect to the scene graph, (attached to the ViewingPlatform node) and transform[numTransforms - 1] is the "bottom most" transform (the ViewPlatorm object is attached to this transform).

Parameters:

numTransforms - The number of transforms for this node to contain. If this number is less than one, one is assumed.

Method Detail

getTransformGroup

public javax.media.j3d.TransformGroup getTransformGroup(int transform)

Returns the selected TransformGroup node.

Parameters:

transform - The index of the transform to return. The indices are in the range [0..(n - 1)] - where n was the number of transforms created. transform[0] is considered the "top most" transform with repsect to the scene graph, (attached to the ViewingPlatform node) and transform[numTransforms - 1] is the "bottom most" transform (the ViewPlatorm object is attached to this transform).

Returns:

The TransformGroup node at the designated index. If an out of range index is given, null is returned.

getNumTransforms

public int getNumTransforms()

Returns the number of transforms in this MultiTransformGroup object.

Returns:

The number of transforms in this object.