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LSST Data Management Base Package
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Public Member Functions | List of all members
lsst::afw::geom::ellipses::Parametric Class Referencefinal

A functor that returns points on the boundary of the ellipse as a function of a parameter that runs between 0 and 2 pi (but is not angle). More...

#include <Parametric.h>

Public Member Functions

 Parametric (Ellipse const &ellipse)
 
lsst::geom::Point2D operator() (double t) const
 

Detailed Description

A functor that returns points on the boundary of the ellipse as a function of a parameter that runs between 0 and 2 pi (but is not angle).

Definition at line 39 of file Parametric.h.

Constructor & Destructor Documentation

◆ Parametric()

lsst::afw::geom::ellipses::Parametric::Parametric ( Ellipse const & ellipse)

Definition at line 31 of file Parametric.cc.

31 : _center(ellipse.getCenter()) {
32 double a, b, theta;
33 ellipse.getCore()._assignToAxes(a, b, theta);
34 double c = std::cos(theta);
35 double s = std::sin(theta);
36 _u = lsst::geom::Extent2D(a * c, a * s);
37 _v = lsst::geom::Extent2D(-b * s, b * c);
38}
table::Key< int > b
table::Key< int > a
T cos(T... args)
Extent< double, 2 > Extent2D
Definition Extent.h:400
T sin(T... args)

Member Function Documentation

◆ operator()()

lsst::geom::Point2D lsst::afw::geom::ellipses::Parametric::operator() ( double t) const
inline

Definition at line 43 of file Parametric.h.

43{ return _center + _u * std::cos(t) + _v * std::sin(t); }

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