lsst::afw::geom::ellipses::Axes Class Reference

An ellipse core for the semimajor/semiminor axis and position angle parametrization (a,b,theta). More...

#include <Axes.h>

Inheritance diagram for lsst::afw::geom::ellipses::Axes:

Public Types
enum	ParameterEnum { A = 0, B = 1, THETA = 2 }
typedef Eigen::Vector3d	ParameterVector
	Parameter vector type. More...
typedef Eigen::Matrix3d	Jacobian
	Parameter Jacobian matrix type. More...

Public Member Functions
double const	getA () const
void	setA (double a)
double const	getB () const
void	setB (double b)
double const	getTheta () const
void	setTheta (double theta)
std::shared_ptr< Axes >	clone () const
	Deep copy the ellipse core. More...
std::string	getName () const override
	Return a string that identifies this parametrization. More...
void	normalize () override
	Put the parameters into a "standard form", if possible, and throw InvalidParameterError if they cannot be normalized. More...
void	readParameters (double const *iter) override
	Return the size of the bounding box for the ellipse core. More...
void	writeParameters (double *iter) const override
	Return the size of the bounding box for the ellipse core. More...
Axes &	operator= (Axes const &other)
	Standard assignment. More...
Axes &	operator= (Axes &&other)
Axes &	operator= (BaseCore const &other)
	Converting assignment. More...
	Axes (double a=1.0, double b=1.0, double theta=0.0, bool normalize=false)
	Construct from parameter values. More...
	Axes (BaseCore::ParameterVector const &vector, bool normalize=false)
	Construct from a parameter vector. More...
	Axes (Axes const &other)
	Copy constructor. More...
	Axes (Axes &&other)
	~Axes () override=default
	Axes (BaseCore const &other)
	Converting copy constructor. More...
	Axes (BaseCore::Transformer const &transformer)
	Converting copy constructor. More...
	Axes (BaseCore::Convolution const &convolution)
	Converting copy constructor. More...
void	grow (double buffer)
	Increase the major and minor radii of the ellipse core by the given buffer. More...
void	scale (double factor)
	Scale the size of the ellipse core by the given factor. More...
double	getArea () const
	Return the area of the ellipse core. More...
double	getDeterminantRadius () const
	Return the radius defined as the 4th root of the determinant of the quadrupole matrix. More...
double	getTraceRadius () const
	Return the radius defined as the square root of one half the trace of the quadrupole matrix. More...

Static Public Member Functions
static std::shared_ptr< BaseCore >	make (std::string const &name)
static std::shared_ptr< BaseCore >	make (std::string const &name, ParameterVector const &parameters)
static std::shared_ptr< BaseCore >	make (std::string const &name, double v1, double v2, double v3)
static std::shared_ptr< BaseCore >	make (std::string const &name, BaseCore const &other)
static std::shared_ptr< BaseCore >	make (std::string const &name, Transformer const &other)
static std::shared_ptr< BaseCore >	make (std::string const &name, Convolution const &other)

Protected Member Functions
std::shared_ptr< BaseCore >	_clone () const override
	Return the size of the bounding box for the ellipse core. More...
void	_assignToQuadrupole (double &ixx, double &iyy, double &ixy) const override
	Return the size of the bounding box for the ellipse core. More...
void	_assignFromQuadrupole (double ixx, double iyy, double ixy) override
	Return the size of the bounding box for the ellipse core. More...
void	_assignToAxes (double &a, double &b, double &theta) const override
	Return the size of the bounding box for the ellipse core. More...
void	_assignFromAxes (double a, double b, double theta) override
	Return the size of the bounding box for the ellipse core. More...
Jacobian	_dAssignToQuadrupole (double &ixx, double &iyy, double &ixy) const override
	Return the size of the bounding box for the ellipse core. More...
Jacobian	_dAssignFromQuadrupole (double ixx, double iyy, double ixy) override
	Return the size of the bounding box for the ellipse core. More...
Jacobian	_dAssignToAxes (double &a, double &b, double &theta) const override
	Return the size of the bounding box for the ellipse core. More...
Jacobian	_dAssignFromAxes (double a, double b, double theta) override
	Return the size of the bounding box for the ellipse core. More...

Convolve two bivariate Gaussians defined by their 1-sigma ellipses.
Convolution	convolve (BaseCore const &other)
	Return the size of the bounding box for the ellipse core. More...
Convolution const	convolve (BaseCore const &other) const
	Return the size of the bounding box for the ellipse core. More...
lsst::geom::Extent2D	computeDimensions () const
	Return the size of the bounding box for the ellipse core. More...
ParameterVector const	getParameterVector () const
	Return the core parameters as a vector. More...
void	setParameterVector (ParameterVector const &vector)
	Set the core parameters from a vector. More...
bool	operator== (BaseCore const &other) const
	Compare two ellipse cores for equality. More...
bool	operator!= (BaseCore const &other) const
	Compare two ellipse cores for inequality. More...
Jacobian	dAssign (BaseCore const &other)
	Assign other to this and return the derivative of the conversion, d(this)/d(other). More...
template<typename Output >
Converter< Output >	as () const
	Convert this to the core type specified as a template parameter. More...
static void	registerSubclass (std::shared_ptr< BaseCore > const &example)
	Return the size of the bounding box for the ellipse core. More...
static void	_assignQuadrupoleToAxes (double ixx, double iyy, double ixy, double &a, double &b, double &theta)
	Return the size of the bounding box for the ellipse core. More...
static Jacobian	_dAssignQuadrupoleToAxes (double ixx, double iyy, double ixy, double &a, double &b, double &theta)
	Return the size of the bounding box for the ellipse core. More...
static void	_assignAxesToQuadrupole (double a, double b, double theta, double &ixx, double &iyy, double &ixy)
	Return the size of the bounding box for the ellipse core. More...
static Jacobian	_dAssignAxesToQuadrupole (double a, double b, double theta, double &ixx, double &iyy, double &ixy)
	Return the size of the bounding box for the ellipse core. More...

Detailed Description

An ellipse core for the semimajor/semiminor axis and position angle parametrization (a,b,theta).

Definition at line 47 of file Axes.h.

Member Typedef Documentation

Jacobian

typedef Eigen::Matrix3d lsst::afw::geom::ellipses::BaseCore::Jacobian

inherited

Parameter Jacobian matrix type.

Definition at line 64 of file BaseCore.h.

ParameterVector

typedef Eigen::Vector3d lsst::afw::geom::ellipses::BaseCore::ParameterVector

inherited

Parameter vector type.

Definition at line 63 of file BaseCore.h.

Member Enumeration Documentation

ParameterEnum

enum lsst::afw::geom::ellipses::Axes::ParameterEnum

Enumerator
A
B
THETA

Definition at line 49 of file Axes.h.

{ A = 0, B = 1, THETA = 2 };  

Constructor & Destructor Documentation

Axes() [1/7]

lsst::afw::geom::ellipses::Axes::Axes ( double  a = 1.0, double  b = 1.0, double  theta = 0.0, bool  normalize = false  )

inlineexplicit

Construct from parameter values.

Definition at line 91 of file Axes.h.

            : _vector(a, b, theta) {
        if (normalize) this->normalize();
    }

Axes() [2/7]

lsst::afw::geom::ellipses::Axes::Axes ( BaseCore::ParameterVector const &  vector, bool  normalize = false  )

inlineexplicit

Construct from a parameter vector.

Definition at line 97 of file Axes.h.

                                                                                 : _vector(vector) {
        if (normalize) this->normalize();
    }

Axes() [3/7]

lsst::afw::geom::ellipses::Axes::Axes ( Axes const &  other )

inline

Copy constructor.

Definition at line 102 of file Axes.h.

: _vector(other._vector) {}

Axes() [4/7]

lsst::afw::geom::ellipses::Axes::Axes ( Axes &&  other )

inline

Definition at line 104 of file Axes.h.

: Axes(other) {}

~Axes()

lsst::afw::geom::ellipses::Axes::~Axes ( )

overridedefault

Axes() [5/7]

lsst::afw::geom::ellipses::Axes::Axes ( BaseCore const &  other )

inline

Converting copy constructor.

Definition at line 108 of file Axes.h.

{ *this = other; }

Axes() [6/7]

lsst::afw::geom::ellipses::Axes::Axes ( BaseCore::Transformer const &  transformer )

inline

Converting copy constructor.

Definition at line 111 of file Axes.h.

{ transformer.apply(*this); }

Axes() [7/7]

lsst::afw::geom::ellipses::Axes::Axes ( BaseCore::Convolution const &  convolution )

inline

Converting copy constructor.

Definition at line 114 of file Axes.h.

{ convolution.apply(*this); }

Member Function Documentation

_assignAxesToQuadrupole()

void lsst::afw::geom::ellipses::BaseCore::_assignAxesToQuadrupole ( double  a, double  b, double  theta, double &  ixx, double &  iyy, double &  ixy  )

staticprotectedinherited

Return the size of the bounding box for the ellipse core.

Definition at line 219 of file BaseCore.cc.

                                                    {
    a *= a;
    b *= b;
    double c = std::cos(theta);
    double s = std::sin(theta);
    ixy = (a - b) * c * s;
    c *= c;
    s *= s;
    ixx = c * a + s * b;
    iyy = s * a + c * b;
}

_assignFromAxes()

void lsst::afw::geom::ellipses::Axes::_assignFromAxes ( double  a, double  b, double  theta  )

overrideprotectedvirtual

Return the size of the bounding box for the ellipse core.

Implements lsst::afw::geom::ellipses::BaseCore.

Definition at line 92 of file Axes.cc.

                                                           {
    _vector[A] = a;
    _vector[B] = b;
    _vector[THETA] = theta;
}

_assignFromQuadrupole()

void lsst::afw::geom::ellipses::Axes::_assignFromQuadrupole ( double  ixx, double  iyy, double  ixy  )

overrideprotectedvirtual

Return the size of the bounding box for the ellipse core.

Implements lsst::afw::geom::ellipses::BaseCore.

Definition at line 82 of file Axes.cc.

                                                                   {
    BaseCore::_assignQuadrupoleToAxes(ixx, iyy, ixy, _vector[A], _vector[B], _vector[THETA]);
    normalize();
}

_assignQuadrupoleToAxes()

void lsst::afw::geom::ellipses::BaseCore::_assignQuadrupoleToAxes ( double  ixx, double  iyy, double  ixy, double &  a, double &  b, double &  theta  )

staticprotectedinherited

Return the size of the bounding box for the ellipse core.

Definition at line 184 of file BaseCore.cc.

                                                      {
    double xx_p_yy = ixx + iyy;
    double xx_m_yy = ixx - iyy;
    double t = std::sqrt(xx_m_yy * xx_m_yy + 4 * ixy * ixy);
    a = std::sqrt(0.5 * (xx_p_yy + t));
    b = std::sqrt(0.5 * (xx_p_yy - t));
    theta = 0.5 * std::atan2(2.0 * ixy, xx_m_yy);
}

_assignToAxes()

void lsst::afw::geom::ellipses::Axes::_assignToAxes ( double &  a, double &  b, double &  theta  ) const

overrideprotectedvirtual

Return the size of the bounding box for the ellipse core.

Implements lsst::afw::geom::ellipses::BaseCore.

Definition at line 69 of file Axes.cc.

                                                                  {
    a = _vector[A];
    b = _vector[B];
    theta = _vector[THETA];
}

_assignToQuadrupole()

void lsst::afw::geom::ellipses::Axes::_assignToQuadrupole ( double &  ixx, double &  iyy, double &  ixy  ) const

overrideprotectedvirtual

Return the size of the bounding box for the ellipse core.

Implements lsst::afw::geom::ellipses::BaseCore.

Definition at line 61 of file Axes.cc.

                                                                          {
    BaseCore::_assignAxesToQuadrupole(_vector[A], _vector[B], _vector[THETA], ixx, iyy, ixy);
}

_clone()

std::shared_ptr<BaseCore> lsst::afw::geom::ellipses::Axes::_clone ( ) const

inlineoverrideprotectedvirtual

Return the size of the bounding box for the ellipse core.

Implements lsst::afw::geom::ellipses::BaseCore.

Definition at line 117 of file Axes.h.

{ return std::make_shared<Axes>(*this); }

_dAssignAxesToQuadrupole()

BaseCore::Jacobian lsst::afw::geom::ellipses::BaseCore::_dAssignAxesToQuadrupole ( double  a, double  b, double  theta, double &  ixx, double &  iyy, double &  ixy  )

staticprotectedinherited

Return the size of the bounding box for the ellipse core.

Definition at line 232 of file BaseCore.cc.

                                                                                {
    Jacobian m;
    m.col(0).setConstant(2 * a);
    m.col(1).setConstant(2 * b);
    a *= a;
    b *= b;
    m.col(2).setConstant(a - b);
    double c = std::cos(theta);
    double s = std::sin(theta);
    double cs = c * s;
    ixy = (a - b) * c * s;
    c *= c;
    s *= s;
    ixx = c * a + s * b;
    iyy = s * a + c * b;
    m(0, 0) *= c;
    m(0, 1) *= s;
    m(0, 2) *= -2.0 * cs;
    m(1, 0) *= s;
    m(1, 1) *= c;
    m(1, 2) *= 2.0 * cs;
    m(2, 0) *= cs;
    m(2, 1) *= -cs;
    m(2, 2) *= (c - s);
    return m;
}

_dAssignFromAxes()

BaseCore::Jacobian lsst::afw::geom::ellipses::Axes::_dAssignFromAxes ( double  a, double  b, double  theta  )

overrideprotectedvirtual

Return the size of the bounding box for the ellipse core.

Implements lsst::afw::geom::ellipses::BaseCore.

Definition at line 98 of file Axes.cc.

                                                                        {
    _vector[A] = a;
    _vector[B] = b;
    _vector[THETA] = theta;
    return Jacobian::Identity();
}

_dAssignFromQuadrupole()

BaseCore::Jacobian lsst::afw::geom::ellipses::Axes::_dAssignFromQuadrupole ( double  ixx, double  iyy, double  ixy  )

overrideprotectedvirtual

Return the size of the bounding box for the ellipse core.

Implements lsst::afw::geom::ellipses::BaseCore.

Definition at line 87 of file Axes.cc.

                                                                                {
    return BaseCore::_dAssignQuadrupoleToAxes(ixx, iyy, ixy, _vector[A], _vector[B], _vector[THETA]);
    normalize();
}

_dAssignQuadrupoleToAxes()

BaseCore::Jacobian lsst::afw::geom::ellipses::BaseCore::_dAssignQuadrupoleToAxes ( double  ixx, double  iyy, double  ixy, double &  a, double &  b, double &  theta  )

staticprotectedinherited

Return the size of the bounding box for the ellipse core.

Definition at line 194 of file BaseCore.cc.

                                                                                {
    double xx_p_yy = ixx + iyy;
    double xx_m_yy = ixx - iyy;
    double t2 = xx_m_yy * xx_m_yy + 4.0 * ixy * ixy;
    Eigen::Vector3d dt2(2.0 * xx_m_yy, -2.0 * xx_m_yy, 8.0 * ixy);
    double t = std::sqrt(t2);
    a = std::sqrt(0.5 * (xx_p_yy + t));
    b = std::sqrt(0.5 * (xx_p_yy - t));
    theta = 0.5 * std::atan2(2.0 * ixy, xx_m_yy);
    Jacobian m = Jacobian::Zero();
    m(0, 0) = 0.25 * (1.0 + 0.5 * dt2[0] / t) / a;
    m(0, 1) = 0.25 * (1.0 + 0.5 * dt2[1] / t) / a;
    m(0, 2) = 0.25 * (0.5 * dt2[2] / t) / a;
    m(1, 0) = 0.25 * (1.0 - 0.5 * dt2[0] / t) / b;
    m(1, 1) = 0.25 * (1.0 - 0.5 * dt2[1] / t) / b;
    m(1, 2) = 0.25 * (-0.5 * dt2[2] / t) / b;
 
    m.row(2).setConstant(1.0 / (t * t));
    m(2, 0) *= -ixy;
    m(2, 1) *= ixy;
    m(2, 2) *= xx_m_yy;
    return m;
}

_dAssignToAxes()

BaseCore::Jacobian lsst::afw::geom::ellipses::Axes::_dAssignToAxes ( double &  a, double &  b, double &  theta  ) const

overrideprotectedvirtual

Return the size of the bounding box for the ellipse core.

Implements lsst::afw::geom::ellipses::BaseCore.

Definition at line 75 of file Axes.cc.

                                                                               {
    a = _vector[A];
    b = _vector[B];
    theta = _vector[THETA];
    return Jacobian::Identity();
}

_dAssignToQuadrupole()

BaseCore::Jacobian lsst::afw::geom::ellipses::Axes::_dAssignToQuadrupole ( double &  ixx, double &  iyy, double &  ixy  ) const

overrideprotectedvirtual

Return the size of the bounding box for the ellipse core.

Implements lsst::afw::geom::ellipses::BaseCore.

Definition at line 65 of file Axes.cc.

                                                                                       {
    return BaseCore::_dAssignAxesToQuadrupole(_vector[A], _vector[B], _vector[THETA], ixx, iyy, ixy);
}

as()

template<typename Output >

BaseCore::Converter< Output > lsst::afw::geom::ellipses::BaseCore::as

inlineinherited

Convert this to the core type specified as a template parameter.

Definition at line 238 of file BaseCore.h.

                                                    {
    return Converter<Output>(*this);
}

clone()

std::shared_ptr<Axes> lsst::afw::geom::ellipses::Axes::clone ( ) const

inline

Deep copy the ellipse core.

Definition at line 61 of file Axes.h.

{ return std::static_pointer_cast<Axes>(_clone()); }

computeDimensions()

lsst::geom::Extent2D lsst::afw::geom::ellipses::BaseCore::computeDimensions ( ) const

inherited

Return the size of the bounding box for the ellipse core.

Definition at line 130 of file BaseCore.cc.

                                                   {
    double a, b, theta;
    _assignToAxes(a, b, theta);
    double c = std::cos(theta);
    double s = std::sin(theta);
    c *= c;
    s *= s;
    b *= b;
    a *= a;
    lsst::geom::Extent2D dimensions(std::sqrt(b * s + a * c), std::sqrt(a * s + b * c));
    dimensions *= 2;
    return dimensions;
}

convolve() [1/2]

BaseCore::Convolution lsst::afw::geom::ellipses::BaseCore::convolve ( BaseCore const &  other )

inlineinherited

Return the size of the bounding box for the ellipse core.

Definition at line 93 of file Convolution.h.

                                                                   {
    return BaseCore::Convolution(*this, other);
}

convolve() [2/2]

BaseCore::Convolution const lsst::afw::geom::ellipses::BaseCore::convolve ( BaseCore const &  other ) const

inlineinherited

Return the size of the bounding box for the ellipse core.

Definition at line 97 of file Convolution.h.

                                                                               {
    return BaseCore::Convolution(const_cast<BaseCore &>(*this), other);
}

dAssign()

BaseCore::Jacobian lsst::afw::geom::ellipses::BaseCore::dAssign ( BaseCore const &  other )

inherited

Assign other to this and return the derivative of the conversion, d(this)/d(other).

Definition at line 169 of file BaseCore.cc.

                                                        {
    if (getName() == other.getName()) {
        this->operator=(other);
        return Jacobian::Identity();
    }
    // We use Quadrupole instead of Axes here because the ambiguity of the position angle
    // in the circular case causes some of the Jacobians to/from Axes to be undefined for
    // exact circles.  Quadrupoles don't have that problem, and the Axes-to-Axes case is
    // handled by the above if block.
    double ixx, iyy, ixy;
    Jacobian rhs = other._dAssignToQuadrupole(ixx, iyy, ixy);
    Jacobian lhs = _dAssignFromQuadrupole(ixx, iyy, ixy);
    return lhs * rhs;
}

getA()

double const lsst::afw::geom::ellipses::Axes::getA ( ) const

inline

Definition at line 51 of file Axes.h.

{ return _vector[A]; }

getArea()

double lsst::afw::geom::ellipses::BaseCore::getArea ( ) const

inherited

Return the area of the ellipse core.

Definition at line 112 of file BaseCore.cc.

                               {
    double a, b, theta;
    _assignToAxes(a, b, theta);
    return a * b * lsst::geom::PI;
}

getB()

double const lsst::afw::geom::ellipses::Axes::getB ( ) const

inline

Definition at line 54 of file Axes.h.

{ return _vector[B]; }

getDeterminantRadius()

double lsst::afw::geom::ellipses::BaseCore::getDeterminantRadius ( ) const

inherited

Return the radius defined as the 4th root of the determinant of the quadrupole matrix.

The determinant radius is equal to the standard radius for a circle, and its square times pi is the area of the ellipse.

Definition at line 118 of file BaseCore.cc.

                                            {
    double a, b, theta;
    _assignToAxes(a, b, theta);
    return std::sqrt(a * b);
}

getGridTransform()

BaseCore::GridTransform const lsst::afw::geom::ellipses::BaseCore::getGridTransform ( ) const

inlineinherited

Return the transform that maps the ellipse to the unit circle.

The returned proxy object is implicitly convertible to lsst::geom::LinearTransform and also supports differentiation.

Definition at line 120 of file GridTransform.h.

                                                                    {
    return BaseCore::GridTransform(*this);
}

getName()

std::string lsst::afw::geom::ellipses::Axes::getName ( ) const

overridevirtual

Return a string that identifies this parametrization.

Implements lsst::afw::geom::ellipses::BaseCore.

Definition at line 34 of file Axes.cc.

{ return "Axes"; }

getParameterVector()

BaseCore::ParameterVector const lsst::afw::geom::ellipses::BaseCore::getParameterVector ( ) const

inherited

Return the core parameters as a vector.

Definition at line 144 of file BaseCore.cc.

                                                                 {
    ParameterVector r;
    writeParameters(r.data());
    return r;
}

getTheta()

double const lsst::afw::geom::ellipses::Axes::getTheta ( ) const

inline

Definition at line 57 of file Axes.h.

{ return _vector[THETA]; }

getTraceRadius()

double lsst::afw::geom::ellipses::BaseCore::getTraceRadius ( ) const

inherited

Return the radius defined as the square root of one half the trace of the quadrupole matrix.

The trace radius is equal to the standard radius for a circle.

Definition at line 124 of file BaseCore.cc.

                                      {
    double ixx, iyy, ixy;
    _assignToQuadrupole(ixx, iyy, ixy);
    return std::sqrt(0.5 * (ixx + iyy));
}

grow()

void lsst::afw::geom::ellipses::BaseCore::grow ( double  buffer )

inherited

Increase the major and minor radii of the ellipse core by the given buffer.

Definition at line 96 of file BaseCore.cc.

                                 {
    double a, b, theta;
    _assignToAxes(a, b, theta);
    a += buffer;
    b += buffer;
    _assignFromAxes(a, b, theta);
}

make() [1/6]

std::shared_ptr< BaseCore > lsst::afw::geom::ellipses::BaseCore::make ( std::string const &  name )

staticinherited

Definition at line 56 of file BaseCore.cc.

                                                            {
    std::shared_ptr<BaseCore> result = getRegistryCopy(name);
    *result = Quadrupole();
    return result;
}

make() [2/6]

std::shared_ptr< BaseCore > lsst::afw::geom::ellipses::BaseCore::make ( std::string const &  name, BaseCore const &  other  )

staticinherited

Definition at line 74 of file BaseCore.cc.

                                                                                   {
    std::shared_ptr<BaseCore> result = getRegistryCopy(name);
    *result = other;
    return result;
}

make() [3/6]

std::shared_ptr< BaseCore > lsst::afw::geom::ellipses::BaseCore::make ( std::string const &  name, Convolution const &  other  )

staticinherited

Definition at line 86 of file BaseCore.cc.

                                                                                      {
    std::shared_ptr<BaseCore> result = getRegistryCopy(name);
    other.apply(*result);
    return result;
}

make() [4/6]

std::shared_ptr< BaseCore > lsst::afw::geom::ellipses::BaseCore::make ( std::string const &  name, double  v1, double  v2, double  v3  )

staticinherited

Definition at line 68 of file BaseCore.cc.

                                                                                             {
    std::shared_ptr<BaseCore> result = getRegistryCopy(name);
    result->setParameterVector(ParameterVector(v1, v2, v3));
    return result;
}

make() [5/6]

std::shared_ptr< BaseCore > lsst::afw::geom::ellipses::BaseCore::make ( std::string const &  name, ParameterVector const &  parameters  )

staticinherited

Definition at line 62 of file BaseCore.cc.

                                                                                               {
    std::shared_ptr<BaseCore> result = getRegistryCopy(name);
    result->setParameterVector(parameters);
    return result;
}

make() [6/6]

std::shared_ptr< BaseCore > lsst::afw::geom::ellipses::BaseCore::make ( std::string const &  name, Transformer const &  other  )

staticinherited

Definition at line 80 of file BaseCore.cc.

                                                                                      {
    std::shared_ptr<BaseCore> result = getRegistryCopy(name);
    other.apply(*result);
    return result;
}

normalize()

void lsst::afw::geom::ellipses::Axes::normalize ( )

overridevirtual

Put the parameters into a "standard form", if possible, and throw InvalidParameterError if they cannot be normalized.

Implements lsst::afw::geom::ellipses::BaseCore.

Definition at line 36 of file Axes.cc.

                     {
    if (_vector[A] < 0 || _vector[B] < 0)
        throw LSST_EXCEPT(lsst::pex::exceptions::InvalidParameterError,
                          "Major and minor axes cannot be negative.");
    if (_vector[A] < _vector[B]) {
        std::swap(_vector[A], _vector[B]);
        _vector[THETA] += M_PI_2;
    }
    if (_vector[THETA] > M_PI_2 || _vector[THETA] <= -M_PI_2) {
        _vector[THETA] -= M_PI * std::ceil(_vector[THETA] / M_PI - 0.5);
    }
}

operator!=()

bool lsst::afw::geom::ellipses::BaseCore::operator!= ( BaseCore const &  other ) const

inlineinherited

Compare two ellipse cores for inequality.

Ellipses are only equal if they have the same type.

Definition at line 167 of file BaseCore.h.

{ return !operator==(other); }

operator=() [1/3]

Axes& lsst::afw::geom::ellipses::Axes::operator= ( Axes &&  other )

inline

Definition at line 82 of file Axes.h.

{ return *this = other; }

operator=() [2/3]

Axes& lsst::afw::geom::ellipses::Axes::operator= ( Axes const &  other )

inline

Standard assignment.

Definition at line 77 of file Axes.h.

                                       {
        _vector = other._vector;
        return *this;
    }

operator=() [3/3]

Axes& lsst::afw::geom::ellipses::Axes::operator= ( BaseCore const &  other )

inline

Converting assignment.

Definition at line 85 of file Axes.h.

                                           {
        BaseCore::operator=(other);
        return *this;
    }

operator==()

bool lsst::afw::geom::ellipses::BaseCore::operator== ( BaseCore const &  other ) const

inherited

Compare two ellipse cores for equality.

Ellipse cores are only equal if they have the same type.

Definition at line 152 of file BaseCore.cc.

                                                     {
    return getParameterVector() == other.getParameterVector() && getName() == other.getName();
}

readParameters()

void lsst::afw::geom::ellipses::Axes::readParameters ( double const *  iter )

overridevirtual

Return the size of the bounding box for the ellipse core.

Implements lsst::afw::geom::ellipses::BaseCore.

Definition at line 49 of file Axes.cc.

                                            {
    setA(*iter++);
    setB(*iter++);
    setTheta(*iter++);
}

registerSubclass()

void lsst::afw::geom::ellipses::BaseCore::registerSubclass ( std::shared_ptr< BaseCore > const &  example )

staticprotectedinherited

Return the size of the bounding box for the ellipse core.

Definition at line 92 of file BaseCore.cc.

                                                                      {
    getRegistry()[example->getName()] = example;
}

scale()

void lsst::afw::geom::ellipses::BaseCore::scale ( double  factor )

inherited

Scale the size of the ellipse core by the given factor.

Definition at line 104 of file BaseCore.cc.

                                  {
    double a, b, theta;
    _assignToAxes(a, b, theta);
    a *= factor;
    b *= factor;
    _assignFromAxes(a, b, theta);
}

setA()

void lsst::afw::geom::ellipses::Axes::setA ( double  a )

inline

Definition at line 52 of file Axes.h.

{ _vector[A] = a; }

setB()

void lsst::afw::geom::ellipses::Axes::setB ( double  b )

inline

Definition at line 55 of file Axes.h.

{ _vector[B] = b; }

setParameterVector()

void lsst::afw::geom::ellipses::BaseCore::setParameterVector ( ParameterVector const &  vector )

inherited

Set the core parameters from a vector.

Definition at line 150 of file BaseCore.cc.

{ readParameters(p.data()); }

setTheta()

void lsst::afw::geom::ellipses::Axes::setTheta ( double  theta )

inline

Definition at line 58 of file Axes.h.

{ _vector[THETA] = theta; }

transform() [1/2]

BaseCore::Transformer lsst::afw::geom::ellipses::BaseCore::transform ( lsst::geom::LinearTransform const &  transform )

inlineinherited

Return the transform that maps the ellipse to the unit circle.

The returned proxy object is implicitly convertible to lsst::geom::LinearTransform and also supports differentiation.

Definition at line 116 of file Transformer.h.

                                                                                       {
    return BaseCore::Transformer(*this, transform);
}

transform() [2/2]

BaseCore::Transformer const lsst::afw::geom::ellipses::BaseCore::transform ( lsst::geom::LinearTransform const &  transform ) const

inlineinherited

Return the transform that maps the ellipse to the unit circle.

The returned proxy object is implicitly convertible to lsst::geom::LinearTransform and also supports differentiation.

Definition at line 120 of file Transformer.h.

                                                                                                   {
    return BaseCore::Transformer(const_cast<BaseCore &>(*this), transform);
}

writeParameters()

void lsst::afw::geom::ellipses::Axes::writeParameters ( double *  iter ) const

overridevirtual

Return the size of the bounding box for the ellipse core.

Implements lsst::afw::geom::ellipses::BaseCore.

Definition at line 55 of file Axes.cc.

                                             {
    *iter++ = getA();
    *iter++ = getB();
    *iter++ = getTheta();
}

---

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

• /j/snowflake/release/lsstsw/stack/1a1d771/Linux64/afw/20.0.0/include/lsst/afw/geom/ellipses/Axes.h
• /j/snowflake/release/lsstsw/stack/1a1d771/Linux64/afw/20.0.0/src/geom/ellipses/Axes.cc