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84 lines
2.8 KiB
84 lines
2.8 KiB
// This file is part of libigl, a simple c++ geometry processing library.
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//
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// Copyright (C) 2014 Alec Jacobson <alecjacobson@gmail.com>
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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_PER_EDGE_NORMALS_H
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#define IGL_PER_EDGE_NORMALS_H
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#include "igl_inline.h"
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#include <Eigen/Core>
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namespace igl
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{
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/// Weighting schemes for per edge normals
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enum PerEdgeNormalsWeightingType
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{
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/// Incident face normals have uniform influence on edge normal
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PER_EDGE_NORMALS_WEIGHTING_TYPE_UNIFORM = 0,
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/// Incident face normals are averaged weighted by area
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PER_EDGE_NORMALS_WEIGHTING_TYPE_AREA = 1,
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/// Area weights
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PER_EDGE_NORMALS_WEIGHTING_TYPE_DEFAULT = 2,
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/// Total number of weighting types
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NUM_PER_EDGE_NORMALS_WEIGHTING_TYPE = 3
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};
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/// Compute face normals via vertex position list, face list
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///
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/// @param[in] V #V by 3 eigen Matrix of mesh vertex 3D positions
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/// @param[in] F #F by 3 eigen Matrix of face (triangle) indices
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/// @param[in] weight weighting type
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/// @param[in] FN #F by 3 matrix of 3D face normals per face
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/// @param[out] N #2 by 3 matrix of mesh edge 3D normals per row
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/// @param[out] E #E by 2 matrix of edge indices per row
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/// @param[out] EMAP #E by 1 matrix of indices from all edges to E
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///
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template <
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typename DerivedV,
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typename DerivedF,
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typename DerivedFN,
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typename DerivedN,
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typename DerivedE,
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typename DerivedEMAP>
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IGL_INLINE void per_edge_normals(
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const Eigen::MatrixBase<DerivedV>& V,
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const Eigen::MatrixBase<DerivedF>& F,
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const PerEdgeNormalsWeightingType weight,
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const Eigen::MatrixBase<DerivedFN>& FN,
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Eigen::PlainObjectBase<DerivedN> & N,
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Eigen::PlainObjectBase<DerivedE> & E,
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Eigen::PlainObjectBase<DerivedEMAP> & EMAP);
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/// \overload
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template <
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typename DerivedV,
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typename DerivedF,
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typename DerivedN,
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typename DerivedE,
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typename DerivedEMAP>
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IGL_INLINE void per_edge_normals(
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const Eigen::MatrixBase<DerivedV>& V,
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const Eigen::MatrixBase<DerivedF>& F,
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const PerEdgeNormalsWeightingType weight,
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Eigen::PlainObjectBase<DerivedN> & N,
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Eigen::PlainObjectBase<DerivedE> & E,
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Eigen::PlainObjectBase<DerivedEMAP> & EMAP);
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/// \overload
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template <
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typename DerivedV,
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typename DerivedF,
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typename DerivedN,
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typename DerivedE,
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typename DerivedEMAP>
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IGL_INLINE void per_edge_normals(
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const Eigen::MatrixBase<DerivedV>& V,
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const Eigen::MatrixBase<DerivedF>& F,
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Eigen::PlainObjectBase<DerivedN> & N,
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Eigen::PlainObjectBase<DerivedE> & E,
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Eigen::PlainObjectBase<DerivedEMAP> & EMAP);
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}
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#ifndef IGL_STATIC_LIBRARY
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# include "per_edge_normals.cpp"
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#endif
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#endif
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