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/*
//
// Copyright 2010, 2012 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: 5436 $
//
// $LastChangedDate: 2018-12-10 19:01:20 -0800 (Mon, 10 Dec 2018) $
//
// $LastChangedBy: torstenrohlfing $
//
*/
#ifndef __cmtkSurfaceNormal_h_included_
#define __cmtkSurfaceNormal_h_included_
#include <cmtkconfig.h>
#include <Base/cmtkFixedVector.h>
namespace
cmtk
{
/** \addtogroup Base */
//@{
/// Class that computes the surface normal.
class
SurfaceNormal
{
public:
/// This class.
typedef SurfaceNormal Self;
/// Space vector type.
typedef FixedVector<3,Types::Coordinate> SpaceVectorType;
/// Constructor: takes two non-collinear vectors that span the surface.
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] );
}
/// Get the normal vector.
const SpaceVectorType& Get() const
{
return this->m_Normal;
}
private:
/// The surface normal vector.
SpaceVectorType m_Normal;
};
//@}
} // namespace cmtk
#endif // #ifndef __cmtkSurfaceNormal_h_included_
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