Class lsst::afw::geom::BaseEndpoint

template<typename PointT, typename ArrayT>
class BaseEndpoint

Virtual base class for endpoints, which are helper classes for Transform

Endpoints transform points and lists of points from LSST-specific data types, such as lsst::geom::Point2D and lsst::geom::SpherePoint, to a form accepted by ast::Mapping.tran. Each type of endpoint is used for a particular LSST data type, for example:

• Point2Endpoint is used for lsst::geom::Point2D data

• SpherePointEndpoint for lsst::geom::SpherePoint data

• GenericEndpoint is used when no other form will do; its LSST data type is identical to the type used for ast::Mapping.applyForward.

Endpoints use the following forms of data for raw data:

• std::vector<double> for a single point

• ndarray<double, 2, 2> with dimensions number of axes x number of points for an array of points

Endpoints are designed as helper classes for Transform. Each transform has a two endpoints: one for input data and one for output data.

Endpoint also provides two methods to work with ast::Frames:

• normalizeFrame verifies that a frame is the correct type, and adjusts its settings if necessary

• makeFrame creates a new frame with the correct type and settings

Template Parameters

• PointT: LSST data type for one point

• ArrayT: LSST data type for an array of points