lsst::afw::geom::ellipses::Parametric Class Reference

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.

                                             : _center(ellipse.getCenter()) {
    double a, b, theta;
    ellipse.getCore()._assignToAxes(a, b, theta);
    double c = std::cos(theta);
    double s = std::sin(theta);
    _u = lsst::geom::Extent2D(a * c, a * s);
    _v = lsst::geom::Extent2D(-b * s, b * c);
}

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.

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

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

• /j/snowflake/release/lsstsw/stack/Linux64/afw/18.1.0/include/lsst/afw/geom/ellipses/Parametric.h
• /j/snowflake/release/lsstsw/stack/Linux64/afw/18.1.0/src/geom/ellipses/Parametric.cc