Facemorph
Class Matrix3

java.lang.Object
  Facemorph.Matrix3

public class Matrix3
extends java.lang.Object

3 by 3 matrix utility class

Constructor Summary

Matrix3()
Creates a matrix initialised to an identity matrix

Matrix3(float aa, float ab, float ac, float ba, float bb, float bc, float ca, float cb, float cc)
Sets the values of this matrix

Method Summary

float	get(int x, int y) Gets a single coefficient of this matrix
int	inverse() Inverts this matrix in place
float	magnitude() Return the magnitude of this matrix
Matrix3	multiply(Matrix3 m1) Multiplies m1 by this
void	set(float aa, float ab, float ac, float ba, float bb, float bc, float ca, float cb, float cc) Sets the values of this matrix
void	set(int x, int y, float i) Sets a coefficient of the matrix

Methods inherited from class java.lang.Object

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

Constructor Detail

Matrix3

public Matrix3()

Creates a matrix initialised to an identity matrix

Matrix3

public Matrix3(float aa,
               float ab,
               float ac,
               float ba,
               float bb,
               float bc,
               float ca,
               float cb,
               float cc)

Sets the values of this matrix

Parameters:

aa - matrix coefficient

ab - matrix coefficient

ac - matrix coefficient

ba - matrix coefficient

bb - matrix coefficient

bc - matrix coefficient

ca - matrix coefficient

cb - matrix coefficient

cc - matrix coefficient

Method Detail

set

public void set(float aa,
                float ab,
                float ac,
                float ba,
                float bb,
                float bc,
                float ca,
                float cb,
                float cc)

Sets the values of this matrix

Parameters:

aa - matrix coefficient

ab - matrix coefficient

ac - matrix coefficient

ba - matrix coefficient

bb - matrix coefficient

bc - matrix coefficient

ca - matrix coefficient

cb - matrix coefficient

cc - matrix coefficient

get

public float get(int x,
                 int y)

Gets a single coefficient of this matrix

Parameters:

x - the row to get

y - the col to get

Returns:

the value of matrix(x,y)

set

public void set(int x,
                int y,
                float i)

Sets a coefficient of the matrix

Parameters:

x - the row to set

y - the col to set

i - The value to set (x,y) to

inverse

public int inverse()

Inverts this matrix in place

Returns:

1 if non-singular, 0 if singular

magnitude

public float magnitude()

Return the magnitude of this matrix

Returns:

The magnitude of this matrix

multiply

public Matrix3 multiply(Matrix3 m1)

Multiplies m1 by this

Parameters:

m1 - the matrix to multiply with

Returns:

returns this*m1