82 lines
2.7 KiB
C
82 lines
2.7 KiB
C
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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) 2018 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_REMESH_ALONG_ISOLINE_H
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#define IGL_REMESH_ALONG_ISOLINE_H
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#include "igl_inline.h"
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#include <Eigen/Dense>
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#include <Eigen/Sparse>
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namespace igl
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{
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// Given a triangle mesh and a scalar field, remesh so that a given isovalue
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// of the scalar field follows (new) edges of the output mesh. Effectively
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// running "marching triangles" on mesh, but not in any coherent order. The
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// output mesh should be as manifold as the input.
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//
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// Inputs:
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// V #V by dim list of mesh vertex positions
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// F #F by 3 list of mesh triangle indices into V
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// S #V by 1 list of scalar field
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// val value of S to remesh along
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// Outputs:
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// U #U by dim list of mesh vertex positions #U>=#V
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// G #G by 3 list of mesh triangle indices into U, #G>=#F
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// SU #U list of scalar field values over new mesh
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// J #G list of indices into F revealing birth triangles
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// BC #U by #V sparse matrix of barycentric coordinates so that U = BC*V
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// L #G list of bools whether scalar field in triangle below or above val
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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 DerivedU,
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typename DerivedG,
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typename DerivedJ,
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typename BCtype,
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typename DerivedSU,
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typename DerivedL>
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IGL_INLINE void remesh_along_isoline(
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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 typename DerivedS::Scalar val,
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Eigen::PlainObjectBase<DerivedU> & U,
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Eigen::PlainObjectBase<DerivedG> & G,
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Eigen::PlainObjectBase<DerivedSU> & SU,
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Eigen::PlainObjectBase<DerivedJ> & J,
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Eigen::SparseMatrix<BCtype> & BC,
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Eigen::PlainObjectBase<DerivedL> & L);
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// Input:
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// n number of vertices (#V)
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template <
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typename DerivedF,
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typename DerivedS,
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typename DerivedG,
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typename DerivedJ,
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typename BCtype,
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typename DerivedSU,
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typename DerivedL>
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IGL_INLINE void remesh_along_isoline(
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const int n,
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const Eigen::MatrixBase<DerivedF> & F,
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const Eigen::MatrixBase<DerivedS> & S,
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const typename DerivedS::Scalar val,
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Eigen::PlainObjectBase<DerivedG> & G,
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Eigen::PlainObjectBase<DerivedSU> & SU,
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Eigen::PlainObjectBase<DerivedJ> & J,
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Eigen::SparseMatrix<BCtype> & BC,
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Eigen::PlainObjectBase<DerivedL> & L);
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}
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#ifndef IGL_STATIC_LIBRARY
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# include "remesh_along_isoline.cpp"
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#endif
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#endif
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