net.java.dev.joode.util
Class Matrix2

java.lang.Object
  net.java.dev.joode.util.Matrix2

public class Matrix2
extends java.lang.Object

A two dimensional vector

Author:

Kevin Glass

Field Summary

Vector2	col1 The first column of the matrix
Vector2	col2 The second column of the matrix

Constructor Summary

Matrix2()
Create an empty matrix

Matrix2(float angle)
Create a matrix with a rotation

Matrix2(Vector2 col1, Vector2 col2)
Create a matrix

Method Summary

Matrix2	invert() Transpose the invert
void	set(Matrix3 matrix) takes the x & y components of the 3D matrix to represent the 2D matrix i.e.
Matrix2	transpose() Transpose the matrix

Methods inherited from class java.lang.Object

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

Field Detail

col1

public Vector2 col1

The first column of the matrix

col2

public Vector2 col2

The second column of the matrix

Constructor Detail

Matrix2

public Matrix2()

Create an empty matrix

Matrix2

public Matrix2(float angle)

Create a matrix with a rotation

Parameters:

angle - The angle of the rotation decribed by the matrix

Matrix2

public Matrix2(Vector2 col1,
               Vector2 col2)

Create a matrix

Parameters:

col1 - The first column

col2 - The second column

Method Detail

set

public void set(Matrix3 matrix)

takes the x & y components of the 3D matrix to represent the 2D matrix i.e. the top left 2x2 submatrix of the 3x3 matrix, note: if the 3D matrix really is a 3D matrix with a z component that is not the unit z vector, then this will set the 2D matrix to a garbage rotation, so only use in situations where the 3D matrix is really operating in 2D, X-Y plane conditions

transpose

public Matrix2 transpose()

Transpose the matrix

Returns:

A newly created matrix containing the transpose of this matrix

invert

public Matrix2 invert()

Transpose the invert

Returns:

A newly created matrix containing the invert of this matrix