Simple 2D transformation class. More...

Inheritance diagram for IMP::algebra::Transformation2D:

Public Member Functions
	Transformation2D ()
	constructor. An invalid transformation is built

	Transformation2D (const Rotation2D &r, const Vector2D &t=Vector2D(0.0, 0.0))
	basic constructor from a Rotation2D and translation vector

	Transformation2D (const Vector2D &t)
	Constructor for a transformation with an identity rotation.

Transformation2D	get_inverse () const
	Returns the inverse transformation.

const Rotation2D	get_rotation () const
	Returns the rotation.

Vector2D	get_transformed (const Vector2D &o) const
	Perform the transformation on an 2D vector. More...

const Vector2D	get_translation () const
	Returns the translation.

Vector2D	operator* (const Vector2D &v) const
	Perform the transformation on an 2D vector. More...

Transformation2D	operator* (const Transformation2D &tr) const
	compose two transformations More...

const Transformation2D &	operator*= (const Transformation2D &o)
	See help for operator*.

Transformation2D	operator/ (const Transformation2D &b) const

const Transformation2D &	operator/= (const Transformation2D &o)
	See help for operator/.

void	set_rotation (double angle)

void	set_translation (const Vector2D &v)
	Sets the translation.

void	show (std::ostream &out=std::cout) const

Related Functions
(Note that these are not member functions.)
Transformation2D	compose (const Transformation2D &a, const Transformation2D &b)
	compose two transformations More...

Transformation2D	get_identity_transformation_2d ()
	Returns a transformation that does not do anything.

Transformation2D	get_rotation_about_point (const Vector2D &point, const Rotation2D &rotation)
	Generates a Transformation2D object from a rotation around a point. More...

Detailed Description

Note: This class is a geometric primitive. Also, this class is not not initialized by its default constructor.

Definition at line 29 of file Transformation2D.h.

Member Function Documentation

Vector2D IMP::algebra::Transformation2D::get_transformed ( const Vector2D & o ) const

Parameters

[in] o vector where the transformation is applied

Note: : The transformation is done firstly applying the rotation and then the translation

Definition at line 53 of file Transformation2D.h.

Vector2D IMP::algebra::Transformation2D::operator* ( const Vector2D & v ) const

Note: : The transformation is done firstly applying the rotation and then the translation

Definition at line 62 of file Transformation2D.h.

Transformation2D IMP::algebra::Transformation2D::operator* ( const Transformation2D & tr ) const

\ note The transformations are composed such that for any vector v (rt1*rt2)*v = rt1*(rt2*v)

Definition at line 71 of file Transformation2D.h.

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Transformation2D IMP::algebra::Transformation2D::operator/ ( const Transformation2D & b ) const

Compute the transformation d which, when composed with b, gives this one. That is a(x)== d(b(x)) for all x.

Definition at line 83 of file Transformation2D.h.

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Definition at line 150 of file Transformation2D.h.

Transformation2D get_rotation_about_point	(	const Vector2D &	point,
		const Rotation2D &	rotation
	)

Parameters

[in]	point	Center to rotate about
[in]	rotation	The rotation to perform (defined taking the origin as reference, not the new point).

Definition at line 141 of file Transformation2D.h.

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