Module omix.api

Package omix.util.math.vector

Class Matrix2d

java.lang.Object

omix.util.math.vector.Matrix2d

public class Matrix2d
extends Object

This class is a 2 × 2 matrix with double precision.

Author:

Dr. Peter Droste, Omix Visualization

Constructor Summary

Constructors

Constructor	Description
Matrix2d()
Matrix2d(Vec2d p1, Vec2d p2)	The matrix has the form: |p1.x, p2.x| |p1.y, p2.y|

Method Summary

Modifier and Type	Method	Description
Vec2d	diag()	Returns the diagonal of the matrix as vector
Matrix2d	dot(double a)	Scale
Matrix2d	dot(Matrix2d matrix)	Scalar product
Vec2d	dot(Vec2d vector)	Product with a vector.
double	get(int i, int j)	Returns the value of the matrix index (i,j).
Matrix2d	plus(Matrix2d matrix)	Addition
void	set(int i, int j, double value)	Sets the value of the matrix index (i,j).
String	toString()
Matrix2d	transponate()	Transponates the matrix.

Methods inherited from class java.lang.Object

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

Constructor Details

Matrix2d

public Matrix2d()

Matrix2d

public Matrix2d(Vec2d p1, Vec2d p2)

The matrix has the form:
|p1.x, p2.x|
|p1.y, p2.y|

Parameters:

p1 -

p2 -

Method Details

transponate

public Matrix2d transponate()

Transponates the matrix.

Returns:

this^T

dot

public Matrix2d dot(Matrix2d matrix)

Scalar product

Parameters:

matrix -

Returns:

this⋅matrix

set

public void set(int i, int j, double value)

Sets the value of the matrix index (i,j).

Parameters:

i -

j -

value -

get

public double get(int i, int j)

Returns the value of the matrix index (i,j).

Parameters:

i -

j -

Returns:

value at i,j

plus

public Matrix2d plus(Matrix2d matrix)

Addition

Parameters:

matrix -

Returns:

this + matrix

dot

public Matrix2d dot(double a)

Scale

Parameters:

a -

Returns:

this⋅a

dot

public Vec2d dot(Vec2d vector)

Product with a vector.

Parameters:

vector -

Returns:

this⋅vector

diag

public Vec2d diag()

Returns the diagonal of the matrix as vector

Returns:

the diagonal of the matrix as vector

toString

public String toString()

Overrides:

toString in class Object

See Also:

Object.toString()