DefaultWCCoordinateHandler.h

Classes

DefaultWCCoordinateHandler -- Class to provide default coordinate handling for WorldCanvases. (full description)

class DefaultWCCoordinateHandler : public WCCoordinateHandler

Interface

Public Members

DefaultWCCoordinateHandler()

virtual Bool linToWorld(Vector<Double> & world, const Vector<Double> & lin)

virtual Bool linToWorld(Matrix<Double> & world, Vector<Bool> & failures, const Matrix<Double> & lin)

virtual Bool worldToLin(Vector<Double> & lin, const Vector<Double> & world)

virtual Bool worldToLin(Matrix<Double> & lin, Vector<Bool> & failures, const Matrix<Double> & world)

virtual uInt nWorldAxes() const

virtual Vector<String> worldAxisNames()

virtual Vector<String> worldAxisUnits()

virtual ~DefaultWCCoordinateHandler()

Description

Prerequisite

Etymology

DefaultWCCoordinateHandler stands for Default WorldCanvas Coordinate Handler

Synopsis

Implements identity transformation function pairs between World Coordinates and linear coordinates. It assumes 2 axes only.

Motivation

Recognized that 95% of the time the WorldCanvas will be used in conjunction with a world coordinate system of some kind. So it makes more sense to assume that there is always a coordinate handler available and use it rather than to have to check to see if there is a handler registered with the WorldCanvas or not each time you have to do a transformation.

The WorldCanvas creates this default handler for its own purpose.

Member Description