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56 lines
1.8 KiB
C++
56 lines
1.8 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_CIRCULATION_H
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#define IGL_CIRCULATION_H
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#include "igl_inline.h"
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#include <Eigen/Core>
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#include <vector>
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namespace igl
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{
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// Return list of faces around the end point of an edge. Assumes
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// data-structures are built from an edge-manifold **closed** mesh.
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//
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// Inputs:
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// e index into E of edge to circulate
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// ccw whether to _continue_ in ccw direction of edge (circulate around
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// E(e,1))
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// F #F by 3 list of face indices
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// E #E by 2 list of edge indices
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// EMAP #F*3 list of indices into E, mapping each directed edge to unique
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// unique edge in E
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// EF #E by 2 list of edge flaps, EF(e,0)=f means e=(i-->j) is the edge of
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// F(f,:) opposite the vth corner, where EI(e,0)=v. Similarly EF(e,1) "
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// e=(j->i)
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// EI #E by 2 list of edge flap corners (see above).
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// Returns list of faces touched by circulation (in cyclically order).
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//
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IGL_INLINE std::vector<int> circulation(
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const int e,
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const bool ccw,
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const Eigen::MatrixXi & F,
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const Eigen::MatrixXi & E,
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const Eigen::VectorXi & EMAP,
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const Eigen::MatrixXi & EF,
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const Eigen::MatrixXi & EI);
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// Wrapper with VectorXi output.
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IGL_INLINE void circulation(
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const int e,
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const bool ccw,
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const Eigen::MatrixXi & F,
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const Eigen::MatrixXi & E,
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const Eigen::VectorXi & EMAP,
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const Eigen::MatrixXi & EF,
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const Eigen::MatrixXi & EI,
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Eigen::VectorXi & vN);
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}
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#ifndef IGL_STATIC_LIBRARY
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# include "circulation.cpp"
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#endif
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#endif
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