AffineMatrix2 Class Reference

2D affine matrix More...

#include <Point.h>

Inheritance diagram for AffineMatrix2:

Public Member Functions
	AffineMatrix2 (const Float scale=1._f, const PlotPoint translation=PlotPoint(0._f, 0._f))
	Creates the matrix given a uniform scaling factor and a translation vector. More...
	AffineMatrix2 (const Float xx, const Float yx, const Float xy, const Float yy, const Float tx=0._f, const Float ty=0._f)
	Creates the matrix from individual components. More...
Float &	operator() (const Size i, const Size j)
	Returns the given component of the matrix. More...
Float	operator() (const Size i, const Size j) const
	Returns the given component of the matrix. More...
Float	get (const Size i, const Size j) const
	Returns the given component of the matrix. More...
PlotPoint	transformPoint (const PlotPoint &p) const
	Applies the affine transform on given point. More...
PlotPoint	transformVector (const PlotPoint &p) const
	Applies the transform on given vector. More...
AffineMatrix2	inverse () const
	Returns the inverse of the matrix. More...
AffineMatrix2	transpose () const
	Returns the transposed matrix. More...
bool	operator== (const AffineMatrix2 &other) const
Public Member Functions inherited from OperatorTemplate< AffineMatrix2 >
AffineMatrix2	operator+ (const AffineMatrix2 &other) const
AffineMatrix2 &	operator-= (const AffineMatrix2 &other)
bool	operator!= (const AffineMatrix2 &other) const
AffineMatrix2	operator* (const Float value) const
AffineMatrix2	operator/ (const Float value) const
AffineMatrix2 &	operator/= (const Float value)

Static Public Member Functions
static AffineMatrix2	rotate (const Float phi)
	Create a rotation matrix. More...

Detailed Description

2D affine matrix

Represets a generic linear transform + translation of a point

Definition at line 50 of file Point.h.

Constructor & Destructor Documentation

AffineMatrix2() [1/2]

AffineMatrix2::AffineMatrix2 ( const Float  scale = 1._f, const PlotPoint  translation = PlotPoint(0._f, 0._f)  )

inline

Creates the matrix given a uniform scaling factor and a translation vector.

By default, an identity matrix is constructed.

Parameters

scale	Scaling factor
translation	Translation vector

Definition at line 60 of file Point.h.

AffineMatrix2() [2/2]

AffineMatrix2::AffineMatrix2 ( const Float  xx, const Float  yx, const Float  xy, const Float  yy, const Float  tx = 0._f, const Float  ty = 0._f  )

inline

Creates the matrix from individual components.

Definition at line 64 of file Point.h.

Member Function Documentation

get()

Float AffineMatrix2::get ( const Size  i, const Size  j  ) const

inline

Returns the given component of the matrix.

Syntactic sugar.

Definition at line 87 of file Point.h.

inverse()

AffineMatrix2 AffineMatrix2::inverse ( ) const

inline

Returns the inverse of the matrix.

The matrix must be invertible, checked by assert.

Definition at line 107 of file Point.h.

operator()() [1/2]

Float& AffineMatrix2::operator() ( const Size  i, const Size  j  )

inline

Returns the given component of the matrix.

Definition at line 73 of file Point.h.

operator()() [2/2]

Float AffineMatrix2::operator() ( const Size  i, const Size  j  ) const

inline

Returns the given component of the matrix.

Definition at line 79 of file Point.h.

operator==()

bool AffineMatrix2::operator== ( const AffineMatrix2 &  other ) const

inline

Definition at line 143 of file Point.h.

rotate()

static AffineMatrix2 AffineMatrix2::rotate ( const Float  phi )

inlinestatic

Create a rotation matrix.

Definition at line 137 of file Point.h.

transformPoint()

PlotPoint AffineMatrix2::transformPoint ( const PlotPoint &  p ) const

inline

Applies the affine transform on given point.

Definition at line 92 of file Point.h.

transformVector()

PlotPoint AffineMatrix2::transformVector ( const PlotPoint &  p ) const

inline

Applies the transform on given vector.

This does not apply the translation.

Definition at line 100 of file Point.h.

transpose()

AffineMatrix2 AffineMatrix2::transpose ( ) const

inline

Returns the transposed matrix.

The translation component is inverted, so that the transposed orthogonal matrix is equal to its inverse.

Todo:

test

Definition at line 131 of file Point.h.

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

• /home/pavel/projects/astro/sph/src/core/post/Point.h