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62 lines
2.1 KiB
62 lines
2.1 KiB
1 year ago
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// This file is part of libigl, a simple c++ geometry processing library.
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//
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// Copyright (C) 2023 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_ISOLINES_H
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#define IGL_ISOLINES_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 isolines of a scalar field on a triangle mesh.
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///
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/// Isolines may cross perfectly at vertices. The output should not contain
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/// degenerate segments (so long as the input does not contain degenerate
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/// faces). The output segments are *oriented* so that isolines curl
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/// counter-clockwise around local maxima (i.e., for 2D scalar fields). Unless
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/// an isoline hits a boundary, it should be a closed loop. Isolines may run
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/// perfectly along boundaries. Isolines should appear just "above" constants
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/// regions.
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///
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/// @param[in] V #V by dim list of mesh vertex positions
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/// @param[in] F #F by 3 list of mesh triangle indices into V
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/// @param[in] S #S by 1 list of per-vertex scalar values
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/// @param[in] vals #vals by 1 list of values to compute isolines for
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/// @param[out] iV #iV by dim list of isoline vertex positions
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/// @param[out] iE #iE by 2 list of edge indices into iV
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/// @param[out] I #iE by 1 list of indices into vals indicating which value
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/// each segment belongs to
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///
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/// \see isolines_intrinsic, edge_crossings
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template <
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typename DerivedV,
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typename DerivedF,
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typename DerivedS,
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typename Derivedvals,
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typename DerivediV,
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typename DerivediE,
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typename DerivedI>
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void isolines(
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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<DerivedS> & S,
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const Eigen::MatrixBase<Derivedvals> & vals,
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Eigen::PlainObjectBase<DerivediV> & iV,
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Eigen::PlainObjectBase<DerivediE> & iE,
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Eigen::PlainObjectBase<DerivedI> & I);
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}
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#ifndef IGL_STATIC_LIBRARY
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# include "isolines.cpp"
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#endif
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#endif
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