IMP::algebra::Transformation2D Class Reference

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Detailed Description

Simple 2D transformation class.

Note:

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

Public Member Functions
Transformation2D	get_inverse () const
	Returns the inverse transformation.
const Rotation2D	get_rotation () const
	Returns the rotation.
VectorD< 2 >	get_transformed (const VectorD< 2 > &o) const
	Perform the transformation on an 2D vector.
const VectorD< 2 >	get_translation () const
	Returns the translation.
Transformation2D	operator* (const Transformation2D &tr) const
	compose two transformations
VectorD< 2 >	operator* (const VectorD< 2 > &v) const
	Perform the transformation on an 2D vector.
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)
template<typename T1 >
void	set_translation (T1 &v)
	Sets the translation.
void	show (std::ostream &out=std::cout) const
	Prints the transformation.
	Transformation2D (const VectorD< 2 > &t)
	Constructor for a transformation with an identity rotation.
	Transformation2D (const Rotation2D &r, const VectorD< 2 > &t=VectorD< 2 >(0.0, 0.0))
	basic constructor from a Rotation2D and translation vector
	Transformation2D ()
	public for swig
Related Functions
(Note that these are not member functions.)
Transformation2D	compose (const Transformation2D &a, const Transformation2D &b)
	compose two transformations
Transformation2D	get_identity_transformation_2d ()
	Returns a transformation that does not do anything.
Transformation2D	get_rotation_about_point (const VectorD< 2 > &point, const Rotation2D &rotation)
	Generates a Transformation2D object from a rotation around a point.

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Constructor & Destructor Documentation

IMP::algebra::Transformation2D::Transformation2D

(

)

public for swig

constructor. An invalid transformation is built

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Member Function Documentation

VectorD<2> IMP::algebra::Transformation2D::get_transformed

(

const VectorD< 2 > &

o

)

const

Perform the transformation on an 2D vector.

Parameters:

[in]

o

vector where the transformation is applied

Note:

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

Transformation2D IMP::algebra::Transformation2D::operator*

(

const Transformation2D &

tr

)

const

compose two transformations

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

VectorD<2> IMP::algebra::Transformation2D::operator*

(

const VectorD< 2 > &

v

)

const

Perform the transformation on an 2D vector.

Note:

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

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.

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Friends And Related Function Documentation

Transformation2D compose	(	const Transformation2D &	a,
		const Transformation2D &	b
	)			[related]

compose two transformations

For any vector v (a*b)*v = a*(b*v).

Transformation2D get_rotation_about_point	(	const VectorD< 2 > &	point,
		const Rotation2D &	rotation
	)			[related]

Generates a Transformation2D object from a rotation around a point.

Generates a Transformation2D to rotate about a point rather than the origin.

Parameters:

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

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

• Transformation2D.h
• algebra/__init__.py