Package javax.media.j3d

Class RotationPathInterpolator

  • public class RotationPathInterpolator
extends PathInterpolator
    RotationPathInterpolator behavior. This class defines a behavior that varies the rotational component of its target TransformGroup by linearly interpolating among a series of predefined knot/orientation pairs (using the value generated by the specified Alpha object). The interpolated orientation is used to generate a rotation transform in the local coordinate system. 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.

    • Constructor Detail

      • RotationPathInterpolator

        public RotationPathInterpolator​(Alpha alpha,
                                TransformGroup target,
                                Transform3D axisOfTransform,
                                float[] knots,
                                javax.vecmath.Quat4f[] quats)
        Constructs a new RotationPathInterpolator object that varies the target TransformGroup node's transform.
        Parameters:
        alpha - the alpha object of this interpolator
        target - the TransformGroup node affected by this interpolator
        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
        Throws:
        java.lang.IllegalArgumentException - if the lengths of the knots and quats arrays are not the same.

    • Method Detail

      • setQuat

        public void setQuat​(int index,
                    javax.vecmath.Quat4f quat)
        Sets the quat value at the specified index for this interpolator.
        Parameters:
        index - the index to be changed
        quat - the new quat value at the index

      • getQuat

        public void getQuat​(int index,
                    javax.vecmath.Quat4f quat)
        Retrieves the quat value at the specified index.
        Parameters:
        index - the index of the value requested
        quat - the quat object that will have the quat value at index copied into it.

      • setPathArrays

        public void setPathArrays​(float[] knots,
                          javax.vecmath.Quat4f[] quats)
        Replaces the existing arrays of knot values and quaternion values with the specified arrays. The arrays of knots and quats 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
        Throws:
        java.lang.IllegalArgumentException - if the lengths of the knots and quats arrays are not the same.
        Since:
        Java 3D 1.2

      • getQuats

        public void getQuats​(javax.vecmath.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

      • setAxisOfRotation

        public void setAxisOfRotation​(Transform3D axisOfRotation)
        Deprecated.
        As of Java 3D version 1.3, replaced by TransformInterpolator.seTransformAxis(Transform3D)

      • getAxisOfRotation

        public Transform3D getAxisOfRotation()
        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