javax.media.j3d
Class TransparencyInterpolator

java.lang.Object
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  +--javax.media.j3d.SceneGraphObject
        |
        +--javax.media.j3d.Node
              |
              +--javax.media.j3d.Leaf
                    |
                    +--javax.media.j3d.Behavior
                          |
                          +--javax.media.j3d.Interpolator
                                |
                                +--javax.media.j3d.TransparencyInterpolator

public class TransparencyInterpolator

extends Interpolator

TransparencyInterpolator behavior. This class defines a behavior that modifies the transparency of its target TransparencyAttributes object by linearly interpolating between a pair of specified transparency values (using the value generated by the specified Alpha object).

Fields inherited from class javax.media.j3d.Interpolator

defaultWakeupCriterion

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_PICK, ALLOW_PICKABLE_READ, ALLOW_PICKABLE_WRITE, ENABLE_COLLISION_REPORTING, ENABLE_PICK_REPORTING

Constructor Summary

TransparencyInterpolator(Alpha alpha, TransparencyAttributes target)
Constructs a trivial transparency interpolator with a specified target, a minimum transparency of 0.0f and a maximum transparency of 1.0f.

TransparencyInterpolator(Alpha alpha, TransparencyAttributes target, float minimumTransparency, float maximumTransparency)
Constructs a new transparency interpolator that varies the target material's transparency between the two transparency values.

Method Summary

Node	cloneNode(boolean forceDuplicate) Used to create a new instance of the node.
void	duplicateNode(Node originalNode, boolean forceDuplicate) Copies all node information from originalNode into the current node.
float	getMaximumTransparency() This method retrieves this interpolator's maximumTransparency.
float	getMinimumTransparency() This method retrieves this interpolator's minimumTransparency.
TransparencyAttributes	getTarget() This method retrieves this interpolator's target reference.
void	processStimulus(java.util.Enumeration criteria) This method is invoked by the behavior scheduler every frame.
void	setMaximumTransparency(float transparency) This method sets the maximumTransparency for this interpolator.
void	setMinimumTransparency(float transparency) This method sets the minimumTransparency for this interpolator.
void	setTarget(TransparencyAttributes target) This method sets the target TransparencyAttributes object for this interpolator.
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.Interpolator

getAlpha, initialize, setAlpha

Methods inherited from class javax.media.j3d.Behavior

getEnable, getSchedulingBoundingLeaf, getSchedulingBounds, getView, postId, setEnable, setSchedulingBoundingLeaf, setSchedulingBounds, wakeupOn

Methods inherited from class javax.media.j3d.Node

cloneTree, cloneTree, cloneTree, getBounds, getBoundsAutoCompute, getCollidable, getLocalToVworld, getLocalToVworld, getParent, getPickable, setBounds, setBoundsAutoCompute, setCollidable, setPickable

Methods inherited from class javax.media.j3d.SceneGraphObject

clearCapability, duplicateSceneGraphObject, getCapability, getUserData, isCompiled, isLive, setCapability, setUserData

Methods inherited from class java.lang.Object

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

Constructor Detail

TransparencyInterpolator

public TransparencyInterpolator(Alpha alpha,
                                TransparencyAttributes target)

Constructs a trivial transparency interpolator with a specified target, a minimum transparency of 0.0f and a maximum transparency of 1.0f.

Parameters:

alpha - the alpha object for this interpolator

target - the TransparencyAttributes component object affected by this interpolator

TransparencyInterpolator

public TransparencyInterpolator(Alpha alpha,
                                TransparencyAttributes target,
                                float minimumTransparency,
                                float maximumTransparency)

Constructs a new transparency interpolator that varies the target material's transparency between the two transparency values.

Parameters:

alpha - the alpha object for this Interpolator

target - the TransparencyAttributes component object affected by this interpolator

minimumTransparency - the starting transparency

maximumTransparency - the ending transparency

Method Detail

setMinimumTransparency

public void setMinimumTransparency(float transparency)

This method sets the minimumTransparency for this interpolator.

Parameters:

transparency - the new minimum transparency

getMinimumTransparency

public float getMinimumTransparency()

This method retrieves this interpolator's minimumTransparency.

Returns:

the interpolator's minimum transparency value

setMaximumTransparency

public void setMaximumTransparency(float transparency)

This method sets the maximumTransparency for this interpolator.

Parameters:

transparency - the new maximum transparency

getMaximumTransparency

public float getMaximumTransparency()

This method retrieves this interpolator's maximumTransparency.

Returns:

the interpolator's maximal transparency vslue

setTarget

public void setTarget(TransparencyAttributes target)

This method sets the target TransparencyAttributes object for this interpolator.

Parameters:

target - the target TransparencyAttributes object

getTarget

public TransparencyAttributes getTarget()

This method retrieves this interpolator's target reference.

Returns:

the interpolator's target TransparencyAttributes object

processStimulus

public void processStimulus(java.util.Enumeration criteria)

This method is invoked by the behavior scheduler every frame. It maps the alpha value that corresponds to the current time into a transparency value and updates the specified TransparencyAttributes object with this new transparency value.

Overrides:

processStimulus in class Behavior

Parameters:

criteria - an enumeration of the criteria that caused the stimulus

cloneNode

public Node cloneNode(boolean forceDuplicate)

Used to create a new instance of the node. This routine is called by cloneTree to duplicate the current node.

Overrides:

cloneNode in class Node

Parameters:

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 Also:

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

duplicateNode

public void duplicateNode(Node originalNode,
                          boolean forceDuplicate)

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

For any NodeComponent objects contained by the object being duplicated, each NodeComponent object's duplicateOnCloneTree value is used to determine whether the NodeComponent should be duplicated in the new node or if just a reference to the current node should be placed in the new node. This flag can be overridden by setting the forceDuplicate parameter in the cloneTree method to true.

Overrides:

duplicateNode in class Interpolator

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.

See Also:

Node.cloneTree(), Node.cloneNode(boolean), 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 getNewNodeReference 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.

Overrides:

updateNodeReferences in class Behavior

Parameters:

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

See Also:

NodeReferenceTable, Node.cloneTree(), DanglingReferenceException