63 lines
2.3 KiB
C++
63 lines
2.3 KiB
C++
// This file is part of libigl, a simple c++ geometry processing library.
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//
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// Copyright (C) 2015 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_INTERNAL_ANGLES_H
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#define IGL_INTERNAL_ANGLES_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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// Compute internal angles for a triangle mesh
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//
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// Inputs:
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// V #V by dim eigen Matrix of mesh vertex nD positions
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// F #F by poly-size eigen Matrix of face (triangle) indices
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// Output:
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// K #F by poly-size eigen Matrix of internal angles
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// for triangles, columns correspond to edges [1,2],[2,0],[0,1]
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//
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// Known Issues:
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// if poly-size ≠ 3 then dim must equal 3.
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template <typename DerivedV, typename DerivedF, typename DerivedK>
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IGL_INLINE void internal_angles(
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const Eigen::MatrixBase<DerivedV>& V,
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const Eigen::MatrixBase<DerivedF>& F,
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Eigen::PlainObjectBase<DerivedK> & K);
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// Inputs:
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// L_sq #F by 3 list of squared edge lengths
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// Output:
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// K #F by poly-size eigen Matrix of internal angles
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// for triangles, columns correspond to edges [1,2],[2,0],[0,1]
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//
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// Note:
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// Usage of internal_angles_using_squared_edge_lengths is preferred to internal_angles_using_squared_edge_lengths
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template <typename DerivedL, typename DerivedK>
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IGL_INLINE void internal_angles_using_squared_edge_lengths(
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const Eigen::MatrixBase<DerivedL>& L_sq,
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Eigen::PlainObjectBase<DerivedK> & K);
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// Inputs:
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// L #F by 3 list of edge lengths
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// Output:
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// K #F by poly-size eigen Matrix of internal angles
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// for triangles, columns correspond to edges [1,2],[2,0],[0,1]
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//
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// Note:
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// Usage of internal_angles_using_squared_edge_lengths is preferred to internal_angles_using_squared_edge_lengths
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// This function is deprecated and probably will be removed in future versions
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template <typename DerivedL, typename DerivedK>
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IGL_INLINE void internal_angles_using_edge_lengths(
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const Eigen::MatrixBase<DerivedL>& L,
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Eigen::PlainObjectBase<DerivedK> & K);}
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#ifndef IGL_STATIC_LIBRARY
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# include "internal_angles.cpp"
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#endif
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#endif
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