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GreatCircles Class Reference

Draw great circle arcs in the fast preview. More...

#include <GreatCircles.h>

List of all members.

Public Member Functions
void	setViewState (ViewState *viewState)
	Set the ViewState to use for information on output projection and preview display.
void	drawLineFromSpherical (double startLat, double startLong, double endLat, double endLong)
	Draw the shortest segment of the great circle crossing two spherical coordinates.

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Detailed Description

Draw great circle arcs in the fast preview.

A great circle is the spherical equivalent of a straight line, but is often drawn curved, depending on the start and end positions and the projection.

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Member Function Documentation

void GreatCircles::drawLineFromSpherical (  double  startLat, double  startLong, double  endLat, double  endLong )

Draw the shortest segment of the great circle crossing two spherical coordinates. Actually, the line is approximated since OpenGL doesn't do curves. Preconditions: The OpenGL state must be ready to draw lines the required width and colour, and outside of a glBegin/glEnd pair. setViewStatePtr must have been called with a valid (and still valid9 ViewState pointer to the ViewState used by the preview. Parameters: startLat  lattiude of the first point in degrees. startLong  longitude of the first point in degrees. endLat  lattide of the second point in degrees. endLong  longitude of the second point in degrees.

void GreatCircles::setViewState (  ViewState *  viewState  )

Set the ViewState to use for information on output projection and preview display. Parameters: viewState  a pointer to the ViewState the preview is using.

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

• hugin1/hugin/GreatCircles.h
• hugin1/hugin/GreatCircles.cpp

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