javax.media.j3d

Class LOD

java.lang.Object

javax.media.j3d.SceneGraphObject

javax.media.j3d.Node

javax.media.j3d.Leaf

javax.media.j3d.Behavior

javax.media.j3d.LOD

Direct Known Subclasses:

DistanceLOD

public abstract class LOD
extends Behavior

An LOD leaf node is an abstract behavior class that operates on a list of Switch group nodes to select one of the children of the Switch nodes. The LOD class is extended to implement various selection criteria.

Field Summary

Fields

Modifier and Type	Field and Description
(package private) java.util.Vector	switches The LOD Node's vector of switch nodes.
(package private) WakeupOnElapsedFrames	wakeupFrame Wakeup condition for all LOD nodes

Fields inherited from class javax.media.j3d.Node

ALLOW_AUTO_COMPUTE_BOUNDS_READ, ALLOW_AUTO_COMPUTE_BOUNDS_WRITE, ALLOW_BOUNDS_READ, ALLOW_BOUNDS_WRITE, ALLOW_COLLIDABLE_READ, ALLOW_COLLIDABLE_WRITE, ALLOW_LOCAL_TO_VWORLD_READ, ALLOW_LOCALE_READ, ALLOW_PARENT_READ, ALLOW_PICKABLE_READ, ALLOW_PICKABLE_WRITE, ENABLE_COLLISION_REPORTING, ENABLE_PICK_REPORTING

Fields inherited from class javax.media.j3d.SceneGraphObject

nodeHashtable, retained

Constructor Summary

Constructors

Constructor and Description
LOD() Constructs and initializes an LOD node.

Method Summary

Methods

Modifier and Type	Method and Description
void	addSwitch(Switch switchNode) Appends the specified switch node to this LOD's list of switches.
(package private) void	duplicateAttributes(Node originalNode, boolean forceDuplicate) Copies all LOD information from originalNode into the current node.
java.util.Enumeration	getAllSwitches() Returns the enumeration object of all switches.
Switch	getSwitch(int index) Returns the switch node specified by the index.
int	indexOfSwitch(Switch switchNode) Retrieves the index of the specified switch node in this LOD node's list of switches.
void	insertSwitch(Switch switchNode, int index) Inserts the specified switch node at specified index.
int	numSwitches() Returns a count of this LOD's switches.
void	removeAllSwitches() Removes all switch nodes from this LOD node.
void	removeSwitch(int index) Removes the switch node at specified index.
void	removeSwitch(Switch switchNode) Removes the specified switch node from this LOD node's list of switches.
void	setSwitch(Switch switchNode, int index) Replaces the specified switch node with the switch node provided.
void	updateNodeReferences(NodeReferenceTable referenceTable) Callback used to allow a node to check if any nodes referenced by that node have been duplicated via a call to cloneTree.

Methods inherited from class javax.media.j3d.Behavior

createRetained, getEnable, getNumSchedulingIntervals, getSchedulingBoundingLeaf, getSchedulingBounds, getSchedulingInterval, getView, getWakeupCondition, initialize, postId, processStimulus, setEnable, setSchedulingBoundingLeaf, setSchedulingBounds, setSchedulingInterval, wakeupOn

Methods inherited from class javax.media.j3d.Node

checkDuplicateNode, checkForCycle, cloneNode, cloneTree, cloneTree, cloneTree, cloneTree, cloneTree, cloneTree, cloneTree, duplicateNode, getBounds, getBoundsAutoCompute, getCollidable, getLocale, getLocalToVworld, getLocalToVworld, getParent, getPickable, setBounds, setBoundsAutoCompute, setCollidable, setPickable

Methods inherited from class javax.media.j3d.SceneGraphObject

capabilityBitsEmpty, checkForLiveOrCompiled, clearCapability, clearCapabilityIsFrequent, clearLive, duplicateSceneGraphObject, getCapability, getCapabilityIsFrequent, getName, getNamePrefix, getNodeComponent, getUserData, isCompiled, isLive, isLiveOrCompiled, setCapability, setCapabilityIsFrequent, setCompiled, setDefaultReadCapabilities, setLive, setName, setUserData, toString

Methods inherited from class java.lang.Object

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

Field Detail

wakeupFrame

WakeupOnElapsedFrames wakeupFrame

Wakeup condition for all LOD nodes

switches

java.util.Vector switches

The LOD Node's vector of switch nodes.

Constructor Detail

LOD

public LOD()

Constructs and initializes an LOD node.

Method Detail

addSwitch

public void addSwitch(Switch switchNode)

Appends the specified switch node to this LOD's list of switches.

Parameters:

switchNode - the switch node to add to this LOD's list of switches

setSwitch

public void setSwitch(Switch switchNode,
             int index)

Replaces the specified switch node with the switch node provided.

Parameters:

switchNode - the new switch node

index - which switch node to replace

insertSwitch

public void insertSwitch(Switch switchNode,
                int index)

Inserts the specified switch node at specified index.

Parameters:

switchNode - the new switch node

index - position to insert new switch node at

removeSwitch

public void removeSwitch(int index)

Removes the switch node at specified index.

Parameters:

index - which switch node to remove

getSwitch

public Switch getSwitch(int index)

Returns the switch node specified by the index.

Parameters:

index - which switch node to return

Returns:

the switch node at location index

getAllSwitches

public java.util.Enumeration getAllSwitches()

Returns the enumeration object of all switches.

Returns:

the enumeration object of all switches

numSwitches

public int numSwitches()

Returns a count of this LOD's switches.

Returns:

the number of switches controlled by this LOD

indexOfSwitch

public int indexOfSwitch(Switch switchNode)

Retrieves the index of the specified switch node in this LOD node's list of switches.

Parameters:

switchNode - the switch node to be looked up.

Returns:

the index of the specified switch node; returns -1 if the object is not in the list.

Since:

Java 3D 1.3

removeSwitch

public void removeSwitch(Switch switchNode)

Removes the specified switch node from this LOD node's list of switches. If the specified object is not in the list, the list is not modified.

Parameters:

switchNode - the switch node to be removed.

Since:

Java 3D 1.3

removeAllSwitches

public void removeAllSwitches()

Removes all switch nodes from this LOD node.

Since:

Java 3D 1.3

duplicateAttributes

void duplicateAttributes(Node originalNode,
                       boolean forceDuplicate)

Copies all LOD information from originalNode into the current node. This method is called from the cloneNode method which is, in turn, called by the cloneTree method.

Overrides:

duplicateAttributes in class Behavior

Parameters:

originalNode - the original node to duplicate.

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.

Throws:

RestrictedAccessException - if this object is part of a live or compiled scenegraph.

See Also:

Node.duplicateNode(javax.media.j3d.Node, boolean), Node.cloneTree(), NodeComponent.setDuplicateOnCloneTree(boolean)

updateNodeReferences

public void updateNodeReferences(NodeReferenceTable referenceTable)

Callback used to allow a node to check if any nodes referenced by that node have been duplicated via a call to cloneTree. This method is called by cloneTree after all nodes in the sub-graph have been duplicated. The cloned Leaf node's method will be called and the Leaf node can then look up any node references by using the getNewObjectReference method found in the NodeReferenceTable object. If a match is found, a reference to the corresponding Node in the newly cloned sub-graph is returned. If no corresponding reference is found, either a DanglingReferenceException is thrown or a reference to the original node is returned depending on the value of the allowDanglingReferences parameter passed in the cloneTree call.

NOTE: Applications should not call this method directly. It should only be called by the cloneTree method.

Overrides:

updateNodeReferences in class Behavior

Parameters:

referenceTable - a NodeReferenceTableObject that contains the getNewObjectReference method needed to search for new object instances.

See Also:

NodeReferenceTable, Node.cloneTree(), DanglingReferenceException