Interface Transform2D

All Known Implementing Classes:
RVFTransform2D

public interface Transform2D
Common interface for 2D transforms. This interface defines a general 2D transform.

Note:

  • Method Summary

    Modifier and Type
    Method
    Description
    affineTransform(double x, double y)
    Get the AffineTransform that approximates this transform in a neighborhood of a point whose coordinates are (x, y, z).
    void
    transform(double[] srcPts, int srcOff, double[] dstPts, int dstOff, int numPts)
    Apply this transform to a sequence of points with the source points' coordinates specified as double-precision numbers and the destination points' coordinates specified as double-precision numbers.
    void
    transform(double[] srcPts, int srcOff, float[] dstPts, int dstOff, int numPts)
    Apply this transform to a sequence of points with the source points' coordinates specified as double-precision numbers and the destination points' coordinates specified as single-precision numbers.
    void
    transform(float[] srcPts, int srcOff, double[] dstPts, int dstOff, int numPts)
    Apply this transform to a sequence of points with the source points' coordinates specified as single-precision numbers and the destination points' coordinates specified as double-precision numbers.
    void
    transform(float[] srcPts, int srcOff, float[] dstPts, int dstOff, int numPts)
    Apply this transform to a sequence of points with the source points' coordinates specified as single-precision numbers and the destination points' coordinates specified as single-precision numbers.
    transform(Point2D ptSrc, Point2D ptDst)
    Apply this transform to a single point, optionally storing the transformed value in a specified point.
  • Method Details

    • transform

      void transform(double[] srcPts, int srcOff, double[] dstPts, int dstOff, int numPts)
      Apply this transform to a sequence of points with the source points' coordinates specified as double-precision numbers and the destination points' coordinates specified as double-precision numbers. Each point is an ordered triplet (px,py,pz stored as consecutive array elements in that order.

      If srcPts and dstPts are the same array, overlaps will be handle automatically unless documentation for a subclass states otherwise.

      Parameters:
      srcPts - the points to transform
      srcOff - the offset into srcPts at which the first point is stored
      dstPts - the transformed points
      dstOff - the offset into dstPts at which the first transformed point will be stored
      numPts - the number of points
    • transform

      void transform(double[] srcPts, int srcOff, float[] dstPts, int dstOff, int numPts)
      Apply this transform to a sequence of points with the source points' coordinates specified as double-precision numbers and the destination points' coordinates specified as single-precision numbers. Each point is an ordered triplet (px,py,pz stored as consecutive array elements in that order.
      Parameters:
      srcPts - the points to transform
      srcOff - the offset int srcPts at which the first point is stored
      dstPts - the transformed points
      dstOff - the offset in dstPts at which the first transformed point will be stored
      numPts - the number of points
    • transform

      void transform(float[] srcPts, int srcOff, float[] dstPts, int dstOff, int numPts)
      Apply this transform to a sequence of points with the source points' coordinates specified as single-precision numbers and the destination points' coordinates specified as single-precision numbers. Each point is an ordered triplet (px,py,pz stored as consecutive array elements in that order.

      If srcPts and dstPts are the same array, overlaps will be handle automatically unless documentation for a subclass states otherwise.

      Parameters:
      srcPts - the points to transform
      srcOff - the offset int srcPts at which the first point is stored
      dstPts - the transformed points
      dstOff - the offset in dstPts at which the first transformed point will be stored
      numPts - the number of points
    • transform

      void transform(float[] srcPts, int srcOff, double[] dstPts, int dstOff, int numPts)
      Apply this transform to a sequence of points with the source points' coordinates specified as single-precision numbers and the destination points' coordinates specified as double-precision numbers. Each point is an ordered triplet (px,py,pz stored as consecutive array elements in that order.
      Parameters:
      srcPts - the points to transform
      srcOff - the offset int srcPts at which the first point is stored
      dstPts - the transformed points
      dstOff - the offset in dstPts at which the first transformed point will be stored
      numPts - the number of points
    • transform

      Point2D transform(Point2D ptSrc, Point2D ptDst)
      Apply this transform to a single point, optionally storing the transformed value in a specified point. Note: ptSrc and ptDst can be the same point.
      Parameters:
      ptSrc - the untransformed point
      ptDst - the point to be transformed (a new point will be created if the value is null)
      Returns:
      the transformed point
    • affineTransform

      AffineTransform affineTransform(double x, double y) throws UnsupportedOperationException
      Get the AffineTransform that approximates this transform in a neighborhood of a point whose coordinates are (x, y, z).

      If a transform is represented by the equations

          x' = f(x,y)
          y' = g(x,y)
       
      and the first partial derivatives of f and g exist, then we can approximate the transform at a point (x0,y0) by
          x' = f(x0,y0) + f1(x0,y0)(x-x0) + f2(x0,y0)(y-y0) + f3(x0,y0)(z-z0)
          y' = g(x0,y0) + g1(x0,y0)(x-x0) + g2(x0,y0)(y-y0) + g3(x0,y0)(z-z0)
       
      This set of equations represents an affine transform whose non-translation components are
         m00 = f1(x0,y0)
         m10 = g1(x0,y0)
         m01 = f2(x0,y0)
         m11 = g2(x0,y0)
       
      and whose translation components are
          m02 = f(x0,y0) - f1(x0,y0)x0 - f2(x0,y0)y0
          m12 = g(x0,y0) - g1(x0,y0)x0 - g2(x0,y0)y0
       
      that is a good approximation to this transform in a sufficiently small neighborhood of the point (x0,y0).
      Parameters:
      x - the X coordinate
      y - the Y coordinate
      Returns:
      an AffineTransform2D that approximates this transform; null if one does not exist at the point whose coordinates are (x, y, z)
      Throws:
      UnsupportedOperationException - this operation is not supported by this transform