javax.media.j3d
Class RotPosPathInterpolator

java.lang.Object
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  +--javax.media.j3d.SceneGraphObject
        |
        +--javax.media.j3d.Node
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              +--javax.media.j3d.Leaf
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                    +--javax.media.j3d.Behavior
                          |
                          +--javax.media.j3d.Interpolator
                                |
                                +--javax.media.j3d.TransformInterpolator
                                      |
                                      +--javax.media.j3d.PathInterpolator
                                            |
                                            +--javax.media.j3d.RotPosPathInterpolator

public class RotPosPathInterpolator

extends PathInterpolator

RotPosPathInterpolator behavior. This class defines a behavior that modifies the rotational and translational components of its target TransformGroup by linearly interpolating among a series of predefined knot/positon and knot/orientation pairs (using the value generated by the specified Alpha object). The interpolated position and orientation are used to generate a transform in the local coordinate system of this interpolator.

Field Summary

Fields inherited from class javax.media.j3d.PathInterpolator

currentInterpolationValue, currentKnotIndex

Fields inherited from class javax.media.j3d.TransformInterpolator

axis, axisInverse, target

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_PICKABLE_READ, ALLOW_PICKABLE_WRITE, ENABLE_COLLISION_REPORTING, ENABLE_PICK_REPORTING

Constructor Summary

RotPosPathInterpolator(Alpha alpha, TransformGroup target, Transform3D axisOfTransform, float[] knots, Quat4f[] quats, Point3f[] positions)
Constructs a new interpolator that varies the rotation and translation of the target TransformGroup's transform.

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	getAxisOfRotPos() Deprecated. As of Java 3D version 1.3, replaced by TransformInterpolator.getTransformAxis()
void	getPosition(int index, Point3f position) Retrieves the position value at the specified index.
void	getPositions(Point3f[] positions) Copies the array of position values from this interpolator into the specified array.
void	getQuat(int index, Quat4f quat) Retrieves the quat value at the specified index.
void	getQuats(Quat4f[] quats) Copies the array of quaternion values from this interpolator into the specified array.
void	setAxisOfRotPos(Transform3D axisOfRotPos) Deprecated. As of Java 3D version 1.3, replaced by TransformInterpolator.setTransformAxis(Transform3D)
void	setPathArrays(float[] knots, Quat4f[] quats, Point3f[] positions) Replaces the existing arrays of knot values, quaternion values, and position values with the specified arrays.
void	setPosition(int index, Point3f position) Sets the position at the specified index for this interpolator.
void	setQuat(int index, Quat4f quat) Sets the quat at the specified index for this interpolator.

Methods inherited from class javax.media.j3d.PathInterpolator

computePathInterpolation, computePathInterpolation, getArrayLengths, getKnot, getKnots, setKnot, setKnots

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, getView, getWakeupCondition, postId, setEnable, setSchedulingBoundingLeaf, setSchedulingBounds, setSchedulingInterval, wakeupOn

Methods inherited from class javax.media.j3d.Node

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

Methods inherited from class javax.media.j3d.SceneGraphObject

clearCapability, clearCapabilityIsFrequent, duplicateSceneGraphObject, getCapability, getCapabilityIsFrequent, getUserData, isCompiled, isLive, setCapability, setCapabilityIsFrequent, setUserData

Methods inherited from class java.lang.Object

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

Constructor Detail

RotPosPathInterpolator

public RotPosPathInterpolator(Alpha alpha,
                              TransformGroup target,
                              Transform3D axisOfTransform,
                              float[] knots,
                              Quat4f[] quats,
                              Point3f[] positions)

Constructs a new interpolator that varies the rotation and translation of the target TransformGroup's transform.

Parameters:

alpha - the alpha object for this interpolator

target - the TransformGroup node affected by this translator

axisOfTransform - the transform that defines the local coordinate system in which this interpolator operates

knots - an array of knot values that specify interpolation points.

quats - an array of quaternion values at the knots.

positions - an array of position values at the knots.

Throws:

java.lang.IllegalArgumentException - if the lengths of the knots, quats, and positions arrays are not all the same.

Method Detail

setQuat

public void setQuat(int index,
                    Quat4f quat)

Sets the quat at the specified index for this interpolator.

Parameters:

index - the index to be changed

quat - the new quat value

getQuat

public void getQuat(int index,
                    Quat4f quat)

Retrieves the quat value at the specified index.

Parameters:

index - the index of the value requested

quat - the quat to receive the quat value at the index

setPosition

public void setPosition(int index,
                        Point3f position)

Sets the position at the specified index for this interpolator.

Parameters:

index - the index to be changed

position - the new position value

getPosition

public void getPosition(int index,
                        Point3f position)

Retrieves the position value at the specified index.

Parameters:

index - the index of the value requested

position - the position to receive the position value at the index

setPathArrays

public void setPathArrays(float[] knots,
                          Quat4f[] quats,
                          Point3f[] positions)

Replaces the existing arrays of knot values, quaternion values, and position values with the specified arrays. The arrays of knots, quats, and positions are copied into this interpolator object.

Parameters:

knots - a new array of knot values that specify interpolation points.

quats - a new array of quaternion values at the knots.

positions - a new array of position values at the knots.

Throws:

java.lang.IllegalArgumentException - if the lengths of the knots, quats, and positions arrays are not all the same.

Since:

Java 3D 1.2

getQuats

public void getQuats(Quat4f[] quats)

Copies the array of quaternion values from this interpolator into the specified array. The array must be large enough to hold all of the quats. The individual array elements must be allocated by the caller.

Parameters:

quats - array that will receive the quats.

Since:

Java 3D 1.2

getPositions

public void getPositions(Point3f[] positions)

Copies the array of position values from this interpolator into the specified array. The array must be large enough to hold all of the positions. The individual array elements must be allocated by the caller.

Parameters:

positions - array that will receive the positions.

Since:

Java 3D 1.2

setAxisOfRotPos

public void setAxisOfRotPos(Transform3D axisOfRotPos)

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

getAxisOfRotPos

public Transform3D getAxisOfRotPos()

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)