cmtkSurfaceNormal.h

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/*
//
//  Copyright 2010 SRI International
//
//  This file is part of the Computational Morphometry Toolkit.
//
//  http://www.nitrc.org/projects/cmtk/
//
//  The Computational Morphometry Toolkit is free software: you can
//  redistribute it and/or modify it under the terms of the GNU General Public
//  License as published by the Free Software Foundation, either version 3 of
//  the License, or (at your option) any later version.
//
//  The Computational Morphometry Toolkit 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 General Public License for more details.
//
//  You should have received a copy of the GNU General Public License along
//  with the Computational Morphometry Toolkit.  If not, see
//  <http://www.gnu.org/licenses/>.
//
//  $Revision: 2398 $
//
//  $LastChangedDate: 2010-10-05 14:54:37 -0700 (Tue, 05 Oct 2010) $
//
//  $LastChangedBy: torstenrohlfing $
//
*/

#ifndef __cmtkSurfaceNormal_h_included_
#define __cmtkSurfaceNormal_h_included_

#include <cmtkconfig.h>

#include <Base/cmtkFixedVector.h>

namespace
cmtk
{


class
SurfaceNormal
{
public:
  typedef SurfaceNormal Self;

  typedef FixedVector<3,Types::Coordinate> SpaceVectorType;

  SurfaceNormal( const SpaceVectorType& s1, const SpaceVectorType& s2 )
  {
    this->m_Normal = FixedVectorStaticInitializer<3,Types::Coordinate>::Init( s1[1] * s2[2] - s1[2] * s2[1], s1[2] * s2[0] - s1[0] * s2[2], s1[0] * s2[1] - s1[1] * s2[0] );
  }

  const SpaceVectorType& Get() const
  {
    return this->m_Normal;
  }

private:
  SpaceVectorType m_Normal;
};


} // namespace cmtk

#endif // #ifndef __cmtkSurfaceNormal_h_included_