org.geotools.referencing.operation.matrix
Class AffineTransform2D

java.lang.Object
  java.awt.geom.AffineTransform
      org.geotools.referencing.operation.matrix.AffineTransform2D

All Implemented Interfaces:

org.opengis.util.Cloneable, java.lang.Cloneable, org.opengis.referencing.operation.Matrix, java.io.Serializable

public class AffineTransform2D

extends java.awt.geom.AffineTransform

implements org.opengis.referencing.operation.Matrix

An affine matrix of fixed {@value}×{@value} size. Here, the term "affine" means a matrix with the last row fixed to values. Such matrices are used for affine transformations in a 2D space.

This class both extends the Java2D AffineTransform class and implements the Matrix interface. It allows interoperbility for code that need to pass the same matrix to both Java2D API and more generic API working with coordinates of arbitrary dimension.

This class do not implements the XMatrix interface because the inherited method (new in J2SE 1.6) declares a checked exception, would be an unsupported operation (because it is not possible to change the value at ), would fails in most cases, and would be useless.

Since:

2.3

Version:

$Id: AffineTransform2D.java 17964 2006-02-10 11:27:41Z desruisseaux $

Author:

Martin Desruisseaux

See Also:

Serialized Form

Field Summary

static int

SIZE The matrix size, which is 3.

Fields inherited from class java.awt.geom.AffineTransform

TYPE_FLIP, TYPE_GENERAL_ROTATION, TYPE_GENERAL_SCALE, TYPE_GENERAL_TRANSFORM, TYPE_IDENTITY, TYPE_MASK_ROTATION, TYPE_MASK_SCALE, TYPE_QUADRANT_ROTATION, TYPE_TRANSLATION, TYPE_UNIFORM_SCALE

Constructor Summary

AffineTransform2D()
Creates a new identity matrix.

AffineTransform2D(java.awt.geom.AffineTransform transform)
Constructs a 3×3 matrix from the specified affine transform.

AffineTransform2D(org.opengis.referencing.operation.Matrix matrix)
Creates a new matrix initialized to the same value than the specified one.

Method Summary

double	getElement(int row, int column) Retrieves the value at the specified row and column of this matrix.
int	getNumCol() Returns the number of colmuns in this matrix, which is always {@value} in this implementation.
int	getNumRow() Returns the number of rows in this matrix, which is always {@value} in this implementation.
void	setElement(int row, int column, double value) Modifies the value at the specified row and column of this matrix.
java.lang.String	toString() Returns a string representation of this matrix.

Methods inherited from class java.awt.geom.AffineTransform

clone, concatenate, createInverse, createTransformedShape, deltaTransform, deltaTransform, equals, getDeterminant, getMatrix, getRotateInstance, getRotateInstance, getScaleInstance, getScaleX, getScaleY, getShearInstance, getShearX, getShearY, getTranslateInstance, getTranslateX, getTranslateY, getType, hashCode, inverseTransform, inverseTransform, isIdentity, preConcatenate, rotate, rotate, scale, setToIdentity, setToRotation, setToRotation, setToScale, setToShear, setToTranslation, setTransform, setTransform, shear, transform, transform, transform, transform, transform, transform, translate

Methods inherited from class java.lang.Object

finalize, getClass, notify, notifyAll, wait, wait, wait

Methods inherited from interface org.opengis.referencing.operation.Matrix

clone, isIdentity

Field Detail

SIZE

public static final int SIZE

The matrix size, which is 3.

See Also:

Constant Field Values

Constructor Detail

AffineTransform2D

public AffineTransform2D()

Creates a new identity matrix.

AffineTransform2D

public AffineTransform2D(java.awt.geom.AffineTransform transform)

Constructs a 3×3 matrix from the specified affine transform.

AffineTransform2D

public AffineTransform2D(org.opengis.referencing.operation.Matrix matrix)

Creates a new matrix initialized to the same value than the specified one. The specified matrix size must be {@value}×{@value}.

Method Detail

getNumRow

public final int getNumRow()

Returns the number of rows in this matrix, which is always {@value} in this implementation.

Specified by:

getNumRow in interface org.opengis.referencing.operation.Matrix

getNumCol

public final int getNumCol()

Returns the number of colmuns in this matrix, which is always {@value} in this implementation.

Specified by:

getNumCol in interface org.opengis.referencing.operation.Matrix

getElement

public double getElement(int row,
                         int column)

Retrieves the value at the specified row and column of this matrix.

Specified by:

getElement in interface org.opengis.referencing.operation.Matrix

Parameters:

row - The row number to be retrieved (zero indexed).

column - The column number to be retrieved (zero indexed).

Returns:

The value at the indexed element.

setElement

public void setElement(int row,
                       int column,
                       double value)

Modifies the value at the specified row and column of this matrix.

Specified by:

setElement in interface org.opengis.referencing.operation.Matrix

Parameters:

row - The row number to be retrieved (zero indexed).

column - The column number to be retrieved (zero indexed).

value - The new matrix element value.

toString

public java.lang.String toString()

Returns a string representation of this matrix. The returned string is implementation dependent. It is usually provided for debugging purposes only.