libigl/include/igl/copyleft/cgal/orient3D.h

// This file is part of libigl, a simple c++ geometry processing library.
// 
// Copyright (C) 2016 Qingan Zhou <[email protected]>
// 
// This Source Code Form is subject to the terms of the Mozilla Public License 
// v. 2.0. If a copy of the MPL was not distributed with this file, You can 
// obtain one at http://mozilla.org/MPL/2.0/.

#ifndef IGL_COPYLEFT_CGAL_ORIENT_3D_H
#define IGL_COPYLEFT_CGAL_ORIENT_3D_H

#include "../../igl_inline.h"

namespace igl
{
  namespace copyleft
  {
    namespace cgal
    {
      /// Tests whether a point is above, on, or below a plane.
      ///
      /// @param[in] pa 3D point on plane
      /// @param[in] pb 3D point on plane
      /// @param[in] pc 3D point on plane
      /// @param[in] pd 3D point to test
      ///  @return 1 if pa,pb,pc,pd forms a tet of positive volume.
      ///   0 if pa,pb,pc,pd are coplanar.
      ///  -1 if pa,pb,pc,pd forms a tet of negative volume.
      template <typename Scalar>
      IGL_INLINE short orient3D(
          const Scalar pa[3],
          const Scalar pb[3],
          const Scalar pc[3],
          const Scalar pd[3]);
    }
  }
}

#ifndef IGL_STATIC_LIBRARY
#  include "orient3D.cpp"
#endif
#endif