jigl.image.warp
Class AffineTransform

java.lang.Object
  |
  +--jigl.image.warp.AffineTransform

All Implemented Interfaces:

PointMapper

public class AffineTransform

extends Object

implements PointMapper

Performs any affine warp on a mapped image. The matrix keeps constant.

Field Summary

protected boolean	applied_once Flag for whether the reverse matrix has been calculated.
protected Matrix	inverse Reverse transform matrix
protected Matrix	matrix Transfrom matrix

Constructor Summary

AffineTransform(double[][] data)
Creates an Affine Transform from a two-dimensional array (transform matrix)

AffineTransform(Matrix m)
Creates an Affine Transform from a matrix

Method Summary

void	inverseTransform(float[] x, float[] y) Performs the inverse of the Affine Transformation
void	inverseTransform(float[] x, float[] y, int offset, int count) Performs the inverse of the Affine Transformation.
void	transform(float[] x, float[] y) Performs the Affine Transformation.
void	transform(float[] x, float[] y, int offset, int count) Performs the Affine Transformation

Methods inherited from class java.lang.Object

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

Field Detail

matrix

protected Matrix matrix

Transfrom matrix

inverse

protected Matrix inverse

Reverse transform matrix

applied_once

protected boolean applied_once

Flag for whether the reverse matrix has been calculated. True: having calculated.

Constructor Detail

AffineTransform

public AffineTransform(double[][] data)

Creates an Affine Transform from a two-dimensional array (transform matrix)

AffineTransform

public AffineTransform(Matrix m)

Creates an Affine Transform from a matrix

Method Detail

transform

public void transform(float[] x,
                      float[] y)
               throws IllegalArgumentException

Performs the Affine Transformation. Should satisfy x.length = y.length

Specified by:

transform in interface PointMapper

Parameters:

x - an array containing the x coordinates

y - an array containing the y coordinates

IllegalArgumentException

transform

public void transform(float[] x,
                      float[] y,
                      int offset,
                      int count)
               throws IllegalArgumentException

Performs the Affine Transformation

Specified by:

transform in interface PointMapper

Parameters:

x - an array containing the x coordinates

y - an array containing the y coordinates

offset - the starting point of the array

count - the number of points from the offset to apply the transformation

IllegalArgumentException

inverseTransform

public void inverseTransform(float[] x,
                             float[] y)

Performs the inverse of the Affine Transformation

Specified by:

inverseTransform in interface PointMapper

Parameters:

x - an array containing the x coordinates

y - an array containing the y coordinates

inverseTransform

public void inverseTransform(float[] x,
                             float[] y,
                             int offset,
                             int count)

Performs the inverse of the Affine Transformation.

Specified by:

inverseTransform in interface PointMapper

Parameters:

x - an array containing the x coordinates

y - an array containing the y coordinates

offset - the starting point of the array

count - the number of points from the offset to apply the transformation