AffineMatrix2D Struct Reference

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

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

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

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. More...
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.