AffineMatrix2D Struct Reference

Compacted affine matrix for 2D operations. More...

Public Member Functions
	AffineMatrix2D (Matrix2D m, Point2Dd p)
	Define an affine matrix.
void	Invert ()
	Invert this affine transformation in-place if possible.
AffineMatrix2D	Inverse ()
	Gets the inverse of this affine transformation if possible.
override string	ToString ()
	String conversion.

Static Public Member Functions
static AffineMatrix2D	operator* (AffineMatrix2D lhs, AffineMatrix2D rhs)
	Compose two affine matrices by multiplying them.

Static Public Attributes
static readonly AffineMatrix2D	Identity = new AffineMatrix2D(Matrix2D.Identity, Point2Dd.Empty)
	The identity element.

Properties
Point2Dd	Translation [get, set]
	The translation part of the affine matrix.
Matrix2D	Matrix [get, set]
	The transformation part of the affine matrix.
double	this[int row, int column] [get, set]
	Index access.
bool	IsTranslation [get]
	True if this affine matrix corresponds to a pure translation, false otherwise.

Detailed Description

Compacted affine matrix for 2D operations.

The third line is assumed to be 0, 0, 1.

Constructor & Destructor Documentation

AffineMatrix2D()

AffineMatrix2D	(	Matrix2D	m,
		Point2Dd	p )

Define an affine matrix.

Parameters

m	transformation part
p	translation part

Member Function Documentation

Inverse()

AffineMatrix2D Inverse

(

)

Gets the inverse of this affine transformation if possible.

Returns

Inverse.

Exceptions

DivideByZeroException

If the matrix cannot be inverted.

Invert()

void Invert

(

)

Invert this affine transformation in-place if possible.

Exceptions

DivideByZeroException

If the matrix cannot be inverted.

operator*()

static AffineMatrix2D operator* ( AffineMatrix2D lhs, AffineMatrix2D rhs )

static

Compose two affine matrices by multiplying them.

Parameters

lhs	left hand side operand
rhs	right hand side operand

Returns

composed AffineMatrix struct

ToString()

override string ToString

(

)

String conversion.

Returns

string representation of this affine matrix

Property Documentation

this[int row, int column]

double this[int row, int column]

getset

Index access.

Parameters

row	The row, or "Y" index to get.
column	The column, or "X" index to get.

Returns

Value at the specified position.