// latlon.h
//
// Copyright (C) 2003, 2004 Jason Bevins
//
// This library is free software; you can redistribute it and/or modify it
// under the terms of the GNU Lesser General Public License as published by
// the Free Software Foundation; either version 2.1 of the License, or (at
// your option) any later version.
//
// This library is distributed in the hope that it will be useful, but WITHOUT
// ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
// FITNESS FOR A PARTICULAR PURPOSE.  See the GNU Lesser General Public
// License (COPYING.txt) for more details.
//
// You should have received a copy of the GNU Lesser General Public License
// along with this library; if not, write to the Free Software Foundation,
// Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
//
// The developer's email is jlbezigvins@gmzigail.com (for great email, take
// off every 'zig'.)
//

#ifndef NOISE_LATLON_H
#define NOISE_LATLON_H

#include <math.h>
#include "mathconsts.h"

namespace noise
{

  /// @addtogroup libnoise
  /// @{

  /// Converts latitude/longitude coordinates on a unit sphere into 3D
  /// Cartesian coordinates.
  ///
  /// @param lat The latitude, in degrees.
  /// @param lon The longitude, in degrees.
  /// @param x On exit, this parameter contains the @a x coordinate.
  /// @param y On exit, this parameter contains the @a y coordinate.
  /// @param z On exit, this parameter contains the @a z coordinate.
  ///
  /// @pre lat must range from @b -90 to @b +90.
  /// @pre lon must range from @b -180 to @b +180.
  void LatLonToXYZ (double lat, double lon, double& x, double& y, double& z);

  /// @}

}

#endif
