47 lines
1.5 KiB
C++
47 lines
1.5 KiB
C++
// 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_LOCALBASIS_H
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#define IGL_LOCALBASIS_H
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#include "igl_inline.h"
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#include <Eigen/Core>
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#include <string>
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#include <vector>
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namespace igl
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{
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// Compute a local orthogonal reference system for each triangle in the given mesh
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// Templates:
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// DerivedV derived from vertex positions matrix type: i.e. MatrixXd
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// DerivedF derived from face indices matrix type: i.e. MatrixXi
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// Inputs:
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// V eigen matrix #V by 3
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// F #F by 3 list of mesh faces (must be triangles)
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// Outputs:
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// B1 eigen matrix #F by 3, each vector is tangent to the triangle
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// B2 eigen matrix #F by 3, each vector is tangent to the triangle and perpendicular to B1
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// B3 eigen matrix #F by 3, normal of the triangle
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//
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// See also: adjacency_matrix
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template <typename DerivedV, typename DerivedF>
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IGL_INLINE void local_basis(
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const Eigen::PlainObjectBase<DerivedV>& V,
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const Eigen::PlainObjectBase<DerivedF>& F,
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Eigen::PlainObjectBase<DerivedV>& B1,
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Eigen::PlainObjectBase<DerivedV>& B2,
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Eigen::PlainObjectBase<DerivedV>& B3
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);
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}
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#ifndef IGL_STATIC_LIBRARY
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# include "local_basis.cpp"
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#endif
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#endif
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