Lics::LicsAffTrans Class Reference

A LicsAffTrans object is an affine 2D transformation (rotation plus shift). The effect is first the active rotation and then the active shift/translation. More...

#include <LicsAffTrans.h>

Collaboration diagram for Lics::LicsAffTrans:

Public Member Functions
	LicsAffTrans ()
	default ctor. This is effectively a unity operation which does not move the point. More...
	LicsAffTrans (double ang)
	Constructor for a pure rotation. More...
	LicsAffTrans (const double(*rot)[2])
	Constructor for a pure scale-rotation. More...
	LicsAffTrans (const double(*rot)[2], const double *shif)
	Constructor for the general case. More...
void	apply (const double *in, double *out) const
	Apply the transformation. First rotate, then translate. The operations don't commute in general. More...
void	apply (const float *in, float *out) const
	Apply the transformation. First rotate, then translate. The operations don't commute in general. More...
void	apply (const Nice::Point &in, Nice::Point &out) const
	Apply the transformation. First rotate, then translate. The operations don't commute in general. More...
LicsAffTrans	inverse () const
	Construct the inverse transformation. More...
double	meanScale () const
	Mean scale of the transformation. More...
	LicsAffTrans ()
	LicsAffTrans (double ang)
	LicsAffTrans (const double(*rot)[2])
	LicsAffTrans (const double(*rot)[2], const double *shif)
void	apply (const double *in, double *out) const
void	apply (const float *in, float *out) const
void	apply (const Nice::Point &in, Nice::Point &out) const
LicsAffTrans	inverse () const
double	meanScale () const

Public Attributes
double	rmat [2][2]
	2 by 2 (maybe skew) rotation matrix. More...
double	trans [2]
	translation vector. More...

Detailed Description

A LicsAffTrans object is an affine 2D transformation (rotation plus shift). The effect is first the active rotation and then the active shift/translation.

---

Since

2017-08-03

Author

R. J. Mathar

Constructor & Destructor Documentation

LicsAffTrans() [1/8]

Lics::LicsAffTrans::LicsAffTrans

(

)

default ctor. This is effectively a unity operation which does not move the point.

---

Since

2017-08-03

LicsAffTrans() [2/8]

Lics::LicsAffTrans::LicsAffTrans

(

double

ang

)

Constructor for a pure rotation.

---

Parameters

ang	The angle (in radians) for the active rotation. Counter-clockwise.

Since

2017-08-03

LicsAffTrans() [3/8]

Lics::LicsAffTrans::LicsAffTrans

(

const double(*)

rot[2]

)

Constructor for a pure scale-rotation.

---

Parameters

rot	The 2x2 rotation matrix. This includes a flip if the determinant is negative.

Since

2017-08-03

LicsAffTrans() [4/8]

Lics::LicsAffTrans::LicsAffTrans	(	const double(*)	rot[2],
		const double *	shif
	)

Constructor for the general case.

---

Parameters

rot	The 2x2 rotation matrix. This includes a flip if the determinant is negative.
shif	The shift/translation vvector.

Since

2017-08-03

LicsAffTrans() [5/8]

Lics::LicsAffTrans::LicsAffTrans

(

)

LicsAffTrans() [6/8]

Lics::LicsAffTrans::LicsAffTrans

(

double

ang

)

LicsAffTrans() [7/8]

Lics::LicsAffTrans::LicsAffTrans

(

const double(*)

rot[2]

)

LicsAffTrans() [8/8]

Lics::LicsAffTrans::LicsAffTrans	(	const double(*)	rot[2],
		const double *	shif
	)

Member Function Documentation

apply() [1/6]

void Lics::LicsAffTrans::apply	(	const double *	in,
		double *	out
	)		const

Apply the transformation. First rotate, then translate. The operations don't commute in general.

---

Parameters

in	The 2D source vector/position
out	The 2D image vector/position

Since

2017-08-03

apply() [2/6]

void Lics::LicsAffTrans::apply	(	const double *	in,
		double *	out
	)		const

apply() [3/6]

void Lics::LicsAffTrans::apply	(	const float *	in,
		float *	out
	)		const

Apply the transformation. First rotate, then translate. The operations don't commute in general.

---

Parameters

in	The 2D source vector/position
out	The 2D image vector/position

Since

2017-12-01

apply() [4/6]

void Lics::LicsAffTrans::apply	(	const float *	in,
		float *	out
	)		const

apply() [5/6]

void Lics::LicsAffTrans::apply	(	const Nice::Point &	in,
		Nice::Point &	out
	)		const

apply() [6/6]

void Lics::LicsAffTrans::apply	(	const Nice::Point &	in,
		Nice::Point &	out
	)		const

Apply the transformation. First rotate, then translate. The operations don't commute in general.

---

Parameters

in	The 2D source vector/position
out	The 2D image vector/position

Since

2017-08-24

inverse() [1/2]

LicsAffTrans Lics::LicsAffTrans::inverse

(

)

const

inverse() [2/2]

Lics::LicsAffTrans Lics::LicsAffTrans::inverse

(

)

const

Construct the inverse transformation.

---

Returns

A transformation that would give the unit transformation of concatenated with this.

Since

2017-08-03

meanScale() [1/2]

double Lics::LicsAffTrans::meanScale

(

)

const

meanScale() [2/2]

double Lics::LicsAffTrans::meanScale

(

)

const

Mean scale of the transformation.

---

Returns

square root of the absolute value of the determinant.

Since

2017-12-01

Member Data Documentation

rmat

double Lics::LicsAffTrans::rmat

2 by 2 (maybe skew) rotation matrix.

If sign of the determinant is negative, it includes a flip.

trans

double Lics::LicsAffTrans::trans

translation vector.

---

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

• ln/lics/src/starcat/LicsAffTrans.h
• ln/lics/src/starcat/LicsAffTrans.cc