Package javax.media.j3d

Class 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.

    • Constructor Detail

      • RotPosPathInterpolator

        public RotPosPathInterpolator​(Alpha alpha,
                              TransformGroup target,
                              Transform3D axisOfTransform,
                              float[] knots,
                              javax.vecmath.Quat4f[] quats,
                              javax.vecmath.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,
                    javax.vecmath.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,
                    javax.vecmath.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,
                        javax.vecmath.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,
                        javax.vecmath.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,
                          javax.vecmath.Quat4f[] quats,
                          javax.vecmath.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​(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

      • 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

      • 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