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// This file is part of libigl, a simple c++ geometry processing library.
//
// Copyright (C) 2014 Alec Jacobson <alecjacobson@gmail.com>
//
// 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_DIHEDRAL_ANGLES_H
#define IGL_DIHEDRAL_ANGLES_H
#include "igl_inline.h"
#include <Eigen/Core>
namespace igl
{
// DIHEDRAL_ANGLES Compute dihedral angles for all tets of a given tet mesh
// (V,T)
//
// theta = dihedral_angles(V,T)
// theta = dihedral_angles(V,T,'ParameterName',parameter_value,...)
//
// Inputs:
// V #V by dim list of vertex positions
// T #V by 4 list of tet indices
// Outputs:
// theta #T by 6 list of dihedral angles (in radians)
// cos_theta #T by 6 list of cosine of dihedral angles (in radians)
//
template <
typename DerivedV,
typename DerivedT,
typename Derivedtheta,
typename Derivedcos_theta>
IGL_INLINE void dihedral_angles(
const Eigen::MatrixBase<DerivedV>& V,
const Eigen::MatrixBase<DerivedT>& T,
Eigen::PlainObjectBase<Derivedtheta>& theta,
Eigen::PlainObjectBase<Derivedcos_theta>& cos_theta);
template <
typename DerivedL,
typename DerivedA,
typename Derivedtheta,
typename Derivedcos_theta>
IGL_INLINE void dihedral_angles_intrinsic(
const Eigen::MatrixBase<DerivedL>& L,
const Eigen::MatrixBase<DerivedA>& A,
Eigen::PlainObjectBase<Derivedtheta>& theta,
Eigen::PlainObjectBase<Derivedcos_theta>& cos_theta);
}
#ifndef IGL_STATIC_LIBRARY
# include "dihedral_angles.cpp"
#endif
#endif