A boolean coordinate. More...

#include <CoordinateExpr.h>

Inheritance diagram for lsst::geom::CoordinateExpr< N >:

Public Types
typedef bool	Element

typedef Eigen::Matrix< bool, N, 1, Eigen::DontAlign >	EigenVector

Public Member Functions
	CoordinateExpr (bool val=false) noexcept
	Construct a CoordinateExpr with all elements set to the same scalar value. More...

template<typename Vector >
	CoordinateExpr (Eigen::MatrixBase< Vector > const &vector)
	Construct a CoordinateExpr from an Eigen vector. More...

	CoordinateExpr (CoordinateExpr const &) noexcept=default

	CoordinateExpr (CoordinateExpr &&) noexcept=default

CoordinateExpr &	operator= (CoordinateExpr const &) noexcept=default

CoordinateExpr &	operator= (CoordinateExpr &&) noexcept=default

	~CoordinateExpr () noexcept=default

bool &	operator[] (int n)

bool const &	operator[] (int n) const

bool &	coeffRef (int n)

bool const &	coeffRef (int n) const

EigenVector const &	asEigen () const noexcept(IS_ELEMENT_NOTHROW_COPYABLE)
	Return a fixed-size Eigen representation of the coordinate object. More...

Logical operators
These operators do not provide interoperability with scalars.
CoordinateExpr	and_ (CoordinateExpr const &rhs) const noexcept

CoordinateExpr	or_ (CoordinateExpr const &rhs) const noexcept

CoordinateExpr	not_ () const noexcept

Static Public Attributes
static int const	dimensions

static constexpr bool	IS_ELEMENT_NOTHROW_COPYABLE

static constexpr bool	IS_ELEMENT_NOTHROW_ASSIGNABLE

Protected Member Functions
void	_swap (CoordinateBase &other) noexcept

Protected Attributes
EigenVector	_vector

Related Functions
(Note that these are not member functions.)
bool	allclose (CoordinateBase< CoordinateExpr< N >, bool, N > const &a, CoordinateBase< CoordinateExpr< N >, bool, N > const &b, bool rtol=static_cast< bool >(1E-5), bool atol=static_cast< bool >(1E-8)) noexcept(std::is_nothrow_copy_constructible< bool >::value &&std::is_nothrow_copy_assignable< bool >::value)
	Floating-point comparison with tolerance. More...

Detailed Description

template<int N>
class lsst::geom::CoordinateExpr< N >

A boolean coordinate.

CoordinateExpr is intended to be used as a temporary in coordinate comparisons:

Point2D a(3.5,1.2);
Point2D b(-1.5,4.3);
std::cout << all(a.lt(b)) << std::endl;  // false
std::cout << any(a.lt(b)) << std::endl;  // true

CoordinateExpr is not a true lazy-evaluation expression template, as that seems unnecessary when the object is typically only two bools large (smaller than the raw pointers necessary to implement a lazy solution). The consequence is that there's no short-circuiting of logical operators, but I don't think that will even remotely matter for most use cases. The any() and all() functions do support short-circuiting.

Definition at line 50 of file CoordinateExpr.h.

Member Typedef Documentation

◆ EigenVector

typedef Eigen::Matrix<bool , N, 1, Eigen::DontAlign> lsst::geom::CoordinateBase< CoordinateExpr< N > , bool , N >::EigenVector

inherited

Definition at line 59 of file CoordinateBase.h.

◆ Element

typedef bool lsst::geom::CoordinateBase< CoordinateExpr< N > , bool , N >::Element

inherited

Definition at line 57 of file CoordinateBase.h.

Constructor & Destructor Documentation

◆ CoordinateExpr() [1/4]

template<int N>

lsst::geom::CoordinateExpr< N >::CoordinateExpr ( bool val = false )

inlineexplicitnoexcept

Construct a CoordinateExpr with all elements set to the same scalar value.

Definition at line 55 of file CoordinateExpr.h.

55 : Super(val) {}

val

ImageT val

Definition: CR.cc:146

◆ CoordinateExpr() [2/4]

template<int N>

template<typename Vector >

lsst::geom::CoordinateExpr< N >::CoordinateExpr ( Eigen::MatrixBase< Vector > const & vector )

inlineexplicit

Construct a CoordinateExpr from an Eigen vector.

Definition at line 59 of file CoordinateExpr.h.

59 : Super(vector) {}

◆ CoordinateExpr() [3/4]

template<int N>

lsst::geom::CoordinateExpr< N >::CoordinateExpr ( CoordinateExpr< N > const & )

defaultnoexcept

◆ CoordinateExpr() [4/4]

template<int N>

lsst::geom::CoordinateExpr< N >::CoordinateExpr ( CoordinateExpr< N > && )

defaultnoexcept

◆ ~CoordinateExpr()

template<int N>

lsst::geom::CoordinateExpr< N >::~CoordinateExpr ( )

defaultnoexcept

Member Function Documentation

◆ _swap()

void lsst::geom::CoordinateBase< CoordinateExpr< N > , bool , N >::_swap ( CoordinateBase< CoordinateExpr< N >, bool, N > & other )

inlineprotectednoexceptinherited

Definition at line 108 of file CoordinateBase.h.

108 { _vector.swap(other._vector); }

lsst::geom::CoordinateBase< CoordinateExpr< N >, bool, N >::_vector

EigenVector _vector

Definition: CoordinateBase.h:109

◆ and_()

template<int N>

CoordinateExpr< N > lsst::geom::CoordinateExpr< N >::and_ ( CoordinateExpr< N > const & rhs ) const

noexcept

Definition at line 30 of file CoordinateExpr.cc.

                                                                                        {
     CoordinateExpr r(*this);
     for (int n = 0; n < N; ++n) {
         if (!other[n]) r[n] = false;
     }
     return r;
 }

◆ asEigen()

EigenVector const& lsst::geom::CoordinateBase< CoordinateExpr< N > , bool , N >::asEigen ( ) const

inlinenoexceptinherited

Return a fixed-size Eigen representation of the coordinate object.

The fact that this returns by const reference rather than by value should not be considered part of the API; this is merely an optimization enabled by the implementation.

Definition at line 89 of file CoordinateBase.h.

89 { return _vector; }

◆ coeffRef() [1/2]

bool & lsst::geom::CoordinateBase< CoordinateExpr< N > , bool , N >::coeffRef ( int n )

inlineinherited

Definition at line 80 of file CoordinateBase.h.

80 { return _vector.coeffRef(n); }

◆ coeffRef() [2/2]

bool const& lsst::geom::CoordinateBase< CoordinateExpr< N > , bool , N >::coeffRef ( int n ) const

inlineinherited

Definition at line 81 of file CoordinateBase.h.

81 { return const_cast<EigenVector&>(_vector).coeffRef(n); }

lsst::geom::CoordinateBase< CoordinateExpr< N >, bool, N >::EigenVector

Eigen::Matrix< bool, N, 1, Eigen::DontAlign > EigenVector

Definition: CoordinateBase.h:59

lsst::geom::CoordinateBase< CoordinateExpr< N >, bool, N >::coeffRef

bool & coeffRef(int n)

Definition: CoordinateBase.h:80

◆ not_()

template<int N>

CoordinateExpr< N > lsst::geom::CoordinateExpr< N >::not_

noexcept

Definition at line 48 of file CoordinateExpr.cc.

                                                          {
     CoordinateExpr r;
     for (int n = 0; n < N; ++n) {
         if (!this->operator[](n)) r[n] = true;
     }
     return r;
 }

◆ operator=() [1/2]

template<int N>

CoordinateExpr& lsst::geom::CoordinateExpr< N >::operator= ( CoordinateExpr< N > && )

defaultnoexcept

◆ operator=() [2/2]

template<int N>

CoordinateExpr& lsst::geom::CoordinateExpr< N >::operator= ( CoordinateExpr< N > const & )

defaultnoexcept

◆ operator[]() [1/2]

bool & lsst::geom::CoordinateBase< CoordinateExpr< N > , bool , N >::operator[] ( int n )

inlineinherited

Definition at line 78 of file CoordinateBase.h.

78 { return _vector[n]; }

◆ operator[]() [2/2]

bool const& lsst::geom::CoordinateBase< CoordinateExpr< N > , bool , N >::operator[] ( int n ) const

inlineinherited

Definition at line 79 of file CoordinateBase.h.

79 { return const_cast<EigenVector&>(_vector)[n]; }

◆ or_()

template<int N>

CoordinateExpr< N > lsst::geom::CoordinateExpr< N >::or_ ( CoordinateExpr< N > const & rhs ) const

noexcept

Definition at line 39 of file CoordinateExpr.cc.

                                                                                       {
     CoordinateExpr r(*this);
     for (int n = 0; n < N; ++n) {
         if (other[n]) r[n] = true;
     }
     return r;
 }

Friends And Related Function Documentation

◆ allclose()

bool allclose	(	CoordinateBase< CoordinateExpr< N > , bool , N > const &	a,
		CoordinateBase< CoordinateExpr< N > , bool , N > const &	b,
		bool	rtol = `static_cast<T>(1E-5)`,
		bool	atol = `static_cast<T>(1E-8)`
	)

Interface, naming, and default tolerances matches Numpy.

Definition at line 120 of file CoordinateBase.cc.

                                                                                 {
     Eigen::Array<T, N, 1> diff = (a.asEigen().array() - b.asEigen().array()).abs();
     Eigen::Array<T, N, 1> rhs = (0.5 * (a.asEigen().array() + b.asEigen().array())).abs();
     rhs *= rtol;
     rhs += atol;
     return (diff <= rhs).all();
 }

Member Data Documentation

◆ _vector

EigenVector lsst::geom::CoordinateBase< CoordinateExpr< N > , bool , N >::_vector

protectedinherited

Definition at line 109 of file CoordinateBase.h.

◆ dimensions

int const lsst::geom::CoordinateBase< CoordinateExpr< N > , bool , N >::dimensions

staticinherited

Definition at line 58 of file CoordinateBase.h.

◆ IS_ELEMENT_NOTHROW_ASSIGNABLE

constexpr bool lsst::geom::CoordinateBase< CoordinateExpr< N > , bool , N >::IS_ELEMENT_NOTHROW_ASSIGNABLE

staticconstexprinherited

Definition at line 61 of file CoordinateBase.h.

◆ IS_ELEMENT_NOTHROW_COPYABLE

constexpr bool lsst::geom::CoordinateBase< CoordinateExpr< N > , bool , N >::IS_ELEMENT_NOTHROW_COPYABLE

staticconstexprinherited

Definition at line 60 of file CoordinateBase.h.

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

/j/snowflake/release/lsstsw/stack/lsst-scipipe-0.7.0/Linux64/geom/22.0.1-6-g8d3140d+720564cf76/include/lsst/geom/CoordinateExpr.h
/j/snowflake/release/lsstsw/stack/lsst-scipipe-0.7.0/Linux64/geom/22.0.1-6-g8d3140d+720564cf76/src/CoordinateExpr.cc

Public Types

Public Member Functions

Static Public Attributes

Protected Member Functions

Protected Attributes

Related Functions

Detailed Description

template<int N> class lsst::geom::CoordinateExpr< N >

Member Typedef Documentation

◆ EigenVector

◆ Element

Constructor & Destructor Documentation

◆ CoordinateExpr() [1/4]

◆ CoordinateExpr() [2/4]

◆ CoordinateExpr() [3/4]

◆ CoordinateExpr() [4/4]

◆ ~CoordinateExpr()

Member Function Documentation

◆ _swap()

◆ and_()

◆ asEigen()

◆ coeffRef() [1/2]

◆ coeffRef() [2/2]

◆ not_()

◆ operator=() [1/2]

◆ operator=() [2/2]

◆ operator[]() [1/2]

◆ operator[]() [2/2]

◆ or_()

Friends And Related Function Documentation

◆ allclose()

Member Data Documentation

◆ _vector

◆ dimensions

◆ IS_ELEMENT_NOTHROW_ASSIGNABLE

◆ IS_ELEMENT_NOTHROW_COPYABLE

template<int N>
class lsst::geom::CoordinateExpr< N >