Package javax.media.j3d
Class PositionPathInterpolator
PositionPathInterpolator behavior. This class defines a behavior
that modifies the translational component of its target TransformGroup
by linearly interpolating among a series of predefined knot/position
pairs (using the value generated by the specified Alpha object). The
interpolated position is used to generate a translation transform
in the local coordinate system of this interpolator. The first knot
must have a value of 0.0. The last knot must have a value of 1.0. An
intermediate knot with index k must have a value strictly greater
than any knot with index less than k.
-
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_LOCALE_READ, ALLOW_PARENT_READ, ALLOW_PICKABLE_READ, ALLOW_PICKABLE_WRITE, ENABLE_COLLISION_REPORTING, ENABLE_PICK_REPORTING
-
Constructor Summary
ConstructorsConstructorDescriptionPositionPathInterpolator
(Alpha alpha, TransformGroup target, Transform3D axisOfTransform, float[] knots, javax.vecmath.Point3f[] positions) Constructs a new PositionPathInterpolator that varies the transform of the target TransformGroup. -
Method Summary
Modifier and TypeMethodDescriptioncloneNode
(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.Deprecated.void
getPosition
(int index, javax.vecmath.Point3f position) Retrieves the position value at the specified index.void
getPositions
(javax.vecmath.Point3f[] positions) Copies the array of position values from this interpolator into the specified array.void
setAxisOfTranslation
(Transform3D axisOfTranslation) Deprecated.As of Java 3D version 1.3, replaced byTransformInterpolator.setTransformAxis(Transform3D)
void
setPathArrays
(float[] knots, javax.vecmath.Point3f[] positions) Replaces the existing arrays of knot values and position values with the specified arrays.void
setPosition
(int index, javax.vecmath.Point3f position) Sets the position 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, getLocale, getLocalToVworld, getLocalToVworld, getParent, getPickable, setBounds, setBoundsAutoCompute, setCollidable, setPickable
Methods inherited from class javax.media.j3d.SceneGraphObject
clearCapability, clearCapabilityIsFrequent, duplicateSceneGraphObject, getCapability, getCapabilityIsFrequent, getName, getUserData, isCompiled, isLive, setCapability, setCapabilityIsFrequent, setName, setUserData, toString
-
Constructor Details
-
PositionPathInterpolator
public PositionPathInterpolator(Alpha alpha, TransformGroup target, Transform3D axisOfTransform, float[] knots, javax.vecmath.Point3f[] positions) Constructs a new PositionPathInterpolator that varies the transform of the target TransformGroup.- Parameters:
alpha
- the alpha object for this interpolatortarget
- the TransformGroup node affected by this translatoraxisOfTransform
- the transform that defines the local coordinate system in which this interpolator operatesknots
- an array of knot values that specify interpolation points.positions
- an array of position values at the knots.- Throws:
IllegalArgumentException
- if the lengths of the knots and positions arrays are not the same.
-
-
Method Details
-
setPosition
public void setPosition(int index, javax.vecmath.Point3f position) Sets the position at the specified index for this interpolator.- Parameters:
index
- the index of the position to be changedposition
- the new position at the index
-
getPosition
public void getPosition(int index, javax.vecmath.Point3f position) Retrieves the position value at the specified index.- Parameters:
index
- the index of the value requestedposition
- the variable to receive the position value at the specified index
-
setPathArrays
public void setPathArrays(float[] knots, javax.vecmath.Point3f[] positions) Replaces the existing arrays of knot values and position values with the specified arrays. The arrays of knots and positions are copied into this interpolator object.- Parameters:
knots
- a new array of knot values that specify interpolation pointspositions
- a new array of position values at the knots- Throws:
IllegalArgumentException
- if the lengths of the knots and positions arrays are not the same.- Since:
- Java 3D 1.2
-
getPositions
public void getPositions(javax.vecmath.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
-
setAxisOfTranslation
Deprecated.As of Java 3D version 1.3, replaced byTransformInterpolator.setTransformAxis(Transform3D)
-
getAxisOfTranslation
Deprecated.As of Java 3D version 1.3, replaced byTransformInterpolator.getTransformAxis()
-
computeTransform
Computes the new transform for this interpolator for a given alpha value.- Specified by:
computeTransform
in classTransformInterpolator
- Parameters:
alphaValue
- alpha value between 0.0 and 1.0transform
- object that receives the computed transform for the specified alpha value- Since:
- Java 3D 1.3
-
cloneNode
Used to create a new instance of the node. This routine is called bycloneTree
to duplicate the current node.
-
TransformInterpolator.getTransformAxis()