javax.media.j3d
Class PositionInterpolator

java.lang.Object
  javax.media.j3d.SceneGraphObject
      javax.media.j3d.Node
          javax.media.j3d.Leaf
              javax.media.j3d.Behavior
                  javax.media.j3d.Interpolator
                      javax.media.j3d.TransformInterpolator
                          javax.media.j3d.PositionInterpolator

public class PositionInterpolator
extends TransformInterpolator

Position interpolator behavior. This class defines a behavior that modifies the translational component of its target TransformGroup by linearly interpolating between a pair of specified positions (using the value generated by the specified Alpha object). The interpolated position is used to generate a translation transform along the local X-axis of this interpolator.

Field Summary

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

Constructor Summary

PositionInterpolator(Alpha alpha, TransformGroup target)
Constructs a trivial position interpolator with a specified target, an axisOfTranslation set to Identity, a startPosition of 0.0f, and an endPosition of 1.0f.

PositionInterpolator(Alpha alpha, TransformGroup target, Transform3D axisOfTransform, float startPosition, float endPosition)
Constructs a new position interpolator that varies the target TransformGroup's translational component (startPosition and endPosition).

Method Summary

Node	cloneNode(boolean forceDuplicate) Used to create a new instance of the node.
void	computeTransform(float alphaValue, Transform3D transform) Computes the new transform for this interpolator for a given alpha value.
Transform3D	getAxisOfTranslation() Deprecated. As of Java 3D version 1.3, replaced by TransformInterpolator.getTransformAxis()
float	getEndPosition() This method retrieves this interpolator's endPosition.
float	getStartPosition() This method retrieves this interpolator's startPosition.
void	setAxisOfTranslation(Transform3D axisOfTranslation) Deprecated. As of Java 3D version 1.3, replaced by TransformInterpolator.setTransformAxis(Transform3D)
void	setEndPosition(float position) This method sets the endPosition for this interpolator.
void	setStartPosition(float position) This method sets the startPosition for this interpolator.

Methods inherited from class javax.media.j3d.TransformInterpolator

getTarget, getTransformAxis, processStimulus, setTarget, setTransformAxis, updateNodeReferences

Methods inherited from class javax.media.j3d.Interpolator

getAlpha, initialize, setAlpha

Methods inherited from class javax.media.j3d.Behavior

getEnable, getNumSchedulingIntervals, getSchedulingBoundingLeaf, getSchedulingBounds, getSchedulingInterval, postId, setEnable, setSchedulingBoundingLeaf, setSchedulingBounds, setSchedulingInterval

Methods inherited from class javax.media.j3d.Node

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

clearCapability, clearCapabilityIsFrequent, getCapability, getCapabilityIsFrequent, getName, getUserData, isCompiled, isLive, setCapability, setCapabilityIsFrequent, setName, setUserData, toString

Methods inherited from class java.lang.Object

equals, getClass, hashCode, notify, notifyAll, wait, wait, wait

Constructor Detail

PositionInterpolator

public PositionInterpolator(Alpha alpha,
                            TransformGroup target)

Constructs a trivial position interpolator with a specified target, an axisOfTranslation set to Identity, a startPosition of 0.0f, and an endPosition of 1.0f.

Parameters:

alpha - The alpha object for this Interpolator

target - The target for this position Interpolator

PositionInterpolator

public PositionInterpolator(Alpha alpha,
                            TransformGroup target,
                            Transform3D axisOfTransform,
                            float startPosition,
                            float endPosition)

Constructs a new position interpolator that varies the target TransformGroup's translational component (startPosition and endPosition).

Parameters:

alpha - the alpha object for this interpolator

target - the transformgroup node effected by this positionInterpolator

axisOfTransform - the transform that defines the local coordinate system in which this interpolator operates. The translation is done along the X-axis of this local coordinate system.

startPosition - the starting position

endPosition - the ending position

Method Detail

setStartPosition

public void setStartPosition(float position)

This method sets the startPosition for this interpolator.

Parameters:

position - The new start position

getStartPosition

public float getStartPosition()

This method retrieves this interpolator's startPosition.

Returns:

the interpolator's start position value

setEndPosition

public void setEndPosition(float position)

This method sets the endPosition for this interpolator.

Parameters:

position - The new end position

getEndPosition

public float getEndPosition()

This method retrieves this interpolator's endPosition.

Returns:

the interpolator's end position vslue

setAxisOfTranslation

public void setAxisOfTranslation(Transform3D axisOfTranslation)

Deprecated. As of Java 3D version 1.3, replaced by TransformInterpolator.setTransformAxis(Transform3D)

getAxisOfTranslation

public Transform3D getAxisOfTranslation()

Deprecated. As of Java 3D version 1.3, replaced by TransformInterpolator.getTransformAxis()

computeTransform

public void computeTransform(float alphaValue,
                             Transform3D transform)

Computes the new transform for this interpolator for a given alpha value.

Specified by:

computeTransform in class TransformInterpolator

Parameters:

alphaValue - alpha value between 0.0 and 1.0

transform - object that receives the computed transform for the specified alpha value

Since:

Java 3D 1.3

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)