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52 lines
2.0 KiB
52 lines
2.0 KiB
// This file is part of libigl, a simple c++ geometry processing library.
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//
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// Copyright (C) 2020 Oded Stein <oded.stein@columbia.edu>
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//
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// This Source Code Form is subject to the terms of the Mozilla Public License
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// v. 2.0. If a copy of the MPL was not distributed with this file, You can
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// obtain one at http://mozilla.org/MPL/2.0/.
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#ifndef IGL_EDGE_VECTORS_H
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#define IGL_EDGE_VECTORS_H
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#include "igl_inline.h"
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#include <Eigen/Dense>
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namespace igl
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{
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/// Computes the normalized edge vectors for edges in a triangle mesh
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///
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/// @tparam whether to compute edge perpendiculars
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/// @param[in] V #V by 3 list of vertex positions
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/// @param[in] F #F by 3 list of triangle indices
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/// @param[in] E #F by 3 a mapping from each halfedge to each edge
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/// @param[in] oE #F by 3 the orientation (e.g., -1 or 1) of each halfedge
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/// compared to the orientation of the actual edge, as computed with
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/// orient_halfedges. will be computed if not provided.
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/// @param[out] vecParallel |HE| list of edge vectors
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/// @param[out] vecPerpendicular |HE| list of vectors perpendicular to vec
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template<bool computePerpendicular=true,
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typename DerivedV,typename DerivedF,typename DerivedE,
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typename DerivedoE, typename DerivedvecParallel,
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typename DerivedvecPerpendicular>
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IGL_INLINE void edge_vectors(
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const Eigen::MatrixBase<DerivedV> &V,
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const Eigen::MatrixBase<DerivedF> &F,
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const Eigen::MatrixBase<DerivedE> &E,
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const Eigen::MatrixBase<DerivedoE> &oE,
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Eigen::PlainObjectBase<DerivedvecParallel> &vecParallel,
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Eigen::PlainObjectBase<DerivedvecPerpendicular> &vecPerpendicular);
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/// \overload
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template<typename DerivedV,typename DerivedF,typename DerivedE,
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typename DerivedoE, typename Derivedvec>
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IGL_INLINE void edge_vectors(
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const Eigen::MatrixBase<DerivedV> &V,
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const Eigen::MatrixBase<DerivedF> &F,
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const Eigen::MatrixBase<DerivedE> &E,
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const Eigen::MatrixBase<DerivedoE> &oE,
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Eigen::PlainObjectBase<Derivedvec> &vec);
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}
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#ifndef IGL_STATIC_LIBRARY
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# include "edge_vectors.cpp"
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#endif
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#endif
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