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/*=========================================================================
Program: Visualization Toolkit
Module: vtkGeoMath.h
Copyright (c) Ken Martin, Will Schroeder, Bill Lorensen
All rights reserved.
See Copyright.txt or http://www.kitware.com/Copyright.htm for details.
This software is distributed WITHOUT ANY WARRANTY; without even
the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR
PURPOSE. See the above copyright notice for more information.
=========================================================================*/
/*-------------------------------------------------------------------------
Copyright 2008 Sandia Corporation.
Under the terms of Contract DE-AC04-94AL85000 with Sandia Corporation,
the U.S. Government retains certain rights in this software.
-------------------------------------------------------------------------*/
// .NAME vtkGeoMath - Useful geographic calculations
//
// .SECTION Description
// vtkGeoMath provides some useful geographic calculations.
#ifndef vtkGeoMath_h
#define vtkGeoMath_h
#include "vtkInfovisLayoutModule.h" // For export macro
#include "vtkObject.h"
class VTKINFOVISLAYOUT_EXPORT vtkGeoMath : public vtkObject
{
public:
static vtkGeoMath *New();
vtkTypeMacro(vtkGeoMath, vtkObject);
void PrintSelf(ostream& os, vtkIndent indent);
// Description:
// Returns the average radius of the earth in meters.
static double EarthRadiusMeters() {return 6356750.0;}
// Description:
// Returns the squared distance between two points.
static double DistanceSquared(double pt0[3], double pt1[3]);
// Description:
// Converts a (longitude, latitude, altitude) triple to
// world coordinates where the center of the earth is at the origin.
// Units are in meters.
// Note that having altitude realtive to sea level causes issues.
static void LongLatAltToRect(double lla[3], double rect[3]);
protected:
vtkGeoMath();
~vtkGeoMath();
private:
vtkGeoMath(const vtkGeoMath&); // Not implemented.
void operator=(const vtkGeoMath&); // Not implemented.
};
#endif
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