* This allows an application to specify a bounding region in one coordinate system
* (the local coordinate system of the BoundingLeaf node) other than the local
* coordinate system of the node that references the bounds. For an example of how
* this might be used, consider a closed room with a number of track lights. Each
* light can move independent of the other lights and, as such, needs its own local
* coordinate system. However, the bounding volume is used by all the lights in the
* boundary of the room, which doesn't move when the lights move. In this example,
* the BoundingLeaf node allows the bounding region to be defined in the local
* coordinate system of the room, rather than in the local coordinate system of a
* particular light. All lights can then share this single bounding volume.
*/
public class BoundingLeaf extends Leaf {
/**
* Specifies that this BoundingLeaf node allows read access to its
* bounding region object.
*/
public static final int
ALLOW_REGION_READ = CapabilityBits.BOUNDING_LEAF_ALLOW_REGION_READ;
/**
* Specifies that this BoundingLeaf node allows write access to its
* bounding region object.
*/
public static final int
ALLOW_REGION_WRITE = CapabilityBits.BOUNDING_LEAF_ALLOW_REGION_WRITE;
// Array for setting default read capabilities
private static final int[] readCapabilities = {
ALLOW_REGION_READ
};
/**
* Constructs a BoundingLeaf node with a null (empty) bounding region.
*/
public BoundingLeaf() {
// set default read capabilities
setDefaultReadCapabilities(readCapabilities);
((BoundingLeafRetained)this.retained).createBoundingLeaf();
}
/**
* Constructs a BoundingLeaf node with the specified bounding region.
* @param region the bounding region of this leaf node
*/
public BoundingLeaf(Bounds region) {
// set default read capabilities
setDefaultReadCapabilities(readCapabilities);
((BoundingLeafRetained)this.retained).createBoundingLeaf();
((BoundingLeafRetained)this.retained).initRegion(region);
}
/**
* Sets this BoundingLeaf node's bounding region.
* @param region the bounding region of this leaf node
* @exception CapabilityNotSetException if appropriate capability is
* not set and this object is part of live or compiled scene graph
*/
public void setRegion(Bounds region) {
if (isLiveOrCompiled())
if(!this.getCapability(ALLOW_REGION_WRITE))
throw new CapabilityNotSetException(J3dI18N.getString("BoundingLeaf0"));
if (isLive())
((BoundingLeafRetained)this.retained).setRegion(region);
else
((BoundingLeafRetained)this.retained).initRegion(region);
}
/**
* Retrieves this BoundingLeaf's bounding region.
* @return the bounding region of this leaf node
* @exception CapabilityNotSetException if appropriate capability is
* not set and this object is part of live or compiled scene graph
*/
public Bounds getRegion() {
if (isLiveOrCompiled())
if(!this.getCapability(ALLOW_REGION_READ))
throw new CapabilityNotSetException(J3dI18N.getString("BoundingLeaf1"));
return ((BoundingLeafRetained)this.retained).getRegion();
}
/**
* Creates the BoundingLeafRetained object that this
* BoundingLeaf object will point to.
*/
@Override
void createRetained() {
this.retained = new BoundingLeafRetained();
this.retained.setSource(this);
}
/**
* Used to create a new instance of the node. This routine is called
* by cloneTree to duplicate the current node.
* @param forceDuplicate when set to true, causes the
* duplicateOnCloneTree flag to be ignored. When
* false, the value of each node's
* duplicateOnCloneTree variable determines whether
* NodeComponent data is duplicated or copied.
*
* @see Node#cloneTree
* @see Node#cloneNode
* @see Node#duplicateNode
* @see NodeComponent#setDuplicateOnCloneTree
*/
@Override
public Node cloneNode(boolean forceDuplicate) {
BoundingLeaf bl = new BoundingLeaf();
bl.duplicateNode(this, forceDuplicate);
return bl;
}
/**
* Copies all BoundingLeaf information from
* originalNode into
* the current node. This method is called from the
* cloneNode method which is, in turn, called by the
* cloneTree method.
*
* @param originalNode the original node to duplicate.
* @param forceDuplicate when set to true, causes the
* duplicateOnCloneTree flag to be ignored. When
* false, the value of each node's
* duplicateOnCloneTree variable determines whether
* NodeComponent data is duplicated or copied.
*
* @exception RestrictedAccessException if this object is part of a live
* or compiled scenegraph.
*
* @see Node#duplicateNode
* @see Node#cloneTree
* @see NodeComponent#setDuplicateOnCloneTree
*/
@Override
void duplicateAttributes(Node originalNode, boolean forceDuplicate) {
super.duplicateAttributes(originalNode, forceDuplicate);
((BoundingLeafRetained) retained).initRegion(
((BoundingLeafRetained) originalNode.retained).getRegion());
}
}