com.maxst.ar.MatrixF4x4 Class Reference

Public Member Functions
	MatrixF4x4 ()
float []	getMatrix ()
int	size ()
void	setMatrix (float[] matrix)
void	set (MatrixF4x4 source)
void	setColumnMajor (boolean colMajor)
boolean	isColumnMajor ()
void	multiplyVector4fByMatrix (Vector4f vector)
void	multiplyVector3fByMatrix (Vector3f vector)
void	multiplyMatrix4x4ByMatrix (MatrixF4x4 matrixf)
void	multiplyMatrix (float[] input, int inputOffset, float[] output, int outputOffset)
void	transpose ()
void	setX0 (float value)
void	setX1 (float value)
void	setX2 (float value)
void	setY0 (float value)
void	setY1 (float value)
void	setY2 (float value)
void	setZ0 (float value)
void	setZ1 (float value)
void	setZ2 (float value)
void	setX3 (float value)
void	setY3 (float value)
void	setZ3 (float value)
void	setW0 (float value)
void	setW1 (float value)
void	setW2 (float value)
void	setW3 (float value)

Public Attributes
float []	matrix

Static Public Attributes
static final int []	matIndCol9_3x3 = { 0, 1, 2, 3, 4, 5, 6, 7, 8 }
static final int []	matIndCol16_3x3 = { 0, 1, 2, 4, 5, 6, 8, 9, 10 }
static final int []	matIndRow9_3x3 = { 0, 3, 6, 1, 4, 7, 3, 5, 8 }
static final int []	matIndRow16_3x3 = { 0, 4, 8, 1, 5, 9, 2, 6, 10 }
static final int []	matIndCol16_4x4 = { 0, 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15 }
static final int []	matIndRow16_4x4 = { 0, 4, 8, 12, 1, 5, 9, 13, 2, 6, 10, 14, 3, 7, 11, 15 }

Detailed Description

The Class MatrixF4x4.

Internal the matrix is structured as

[ x0 , y0 , z0 , w0 ] [ x1 , y1 , z1 , w1 ] [ x2 , y2 , z2 , w2 ] [ x3 , y3 , z3 , w3 ]

it is recommend that when setting the matrix values individually that you use the set{x,#} methods, where 'x' is either x, y, z or w and # is either 0, 1, 2 or 3, setY1 for example. The reason you should use these functions is because it will map directly to that part of the matrix regardless of whether or not the internal matrix is column major or not. If the matrix is either or length 9 or 16 it will be able to determine if it can set the value or not. If the matrix is of size 9 but you set say w2, the value will not be set and the set method will return without any error.

Constructor & Destructor Documentation

MatrixF4x4()

com.maxst.ar.MatrixF4x4.MatrixF4x4 ( )

inline

Instantiates a new matrixf4x4. The Matrix is assumed to be Column major, however you can change this by using the setColumnMajor function to false and it will operate like a row major matrix.

Member Function Documentation

getMatrix()

float [] com.maxst.ar.MatrixF4x4.getMatrix ( )

inline

Gets the matrix.

Returns

the matrix, can be null if the matrix is invalid

isColumnMajor()

boolean com.maxst.ar.MatrixF4x4.isColumnMajor ( )

inline

Find out if the stored matrix is column major

Returns

multiplyMatrix4x4ByMatrix()

void com.maxst.ar.MatrixF4x4.multiplyMatrix4x4ByMatrix ( MatrixF4x4  matrixf )

inline

Multiply matrix4x4 by matrix.

Parameters

matrixf

the matrixf

for(int i = 0; i < 4; i++){ for(int j = 0; j < 4; j++){

int k = i * 4; bufferMatrix[0 + j] += this.matrix[k + j] * matrix[0 * 4 + i]; bufferMatrix[1 * 4 + j] += this.matrix[k + j] * matrix[1 * 4 + i]; bufferMatrix[2 * 4 + j] += this.matrix[k + j] * matrix[2 * 4 + i]; bufferMatrix[3 * 4 + j] += this.matrix[k + j] * matrix[3 * 4 + i]; } }

multiplyVector3fByMatrix()

void com.maxst.ar.MatrixF4x4.multiplyVector3fByMatrix ( Vector3f  vector )

inline

Multiply the given vector by this matrix. This should only be used if the matrix is of size 9 (use the matrix.size() method).

Parameters

vector

A vector of length 3.

multiplyVector4fByMatrix()

void com.maxst.ar.MatrixF4x4.multiplyVector4fByMatrix ( Vector4f  vector )

inline

Multiply the given vector by this matrix. This should only be used if the matrix is of size 16 (use the matrix.size() method).

Parameters

vector

A vector of length 4.

setColumnMajor()

void com.maxst.ar.MatrixF4x4.setColumnMajor ( boolean  colMajor )

inline

Set whether the internal data is col major by passing true, or false for a row major matrix. The matrix is column major by default.

Parameters

colMajor

setMatrix()

void com.maxst.ar.MatrixF4x4.setMatrix ( float []  matrix )

inline

Sets the matrix from a float[16] array. If the matrix you set isn't 16 long then the matrix will be set as invalid.

Parameters

matrix

the new matrix

transpose()

void com.maxst.ar.MatrixF4x4.transpose ( )

inline

This will rearrange the internal structure of the matrix. Be careful though as this is an expensive operation.

Member Data Documentation

matrix

float [] com.maxst.ar.MatrixF4x4.matrix

The matrix.

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The documentation for this class was generated from the following file:

• com/maxst/ar/MatrixF4x4.java