82 lines
3.2 KiB
C
82 lines
3.2 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) 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_COPYLEFT_CGAL_REMESH_SELF_INTERSECTIONS_H
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#define IGL_COPYLEFT_CGAL_REMESH_SELF_INTERSECTIONS_H
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#include "../../igl_inline.h"
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#include "RemeshSelfIntersectionsParam.h"
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#include <Eigen/Dense>
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namespace igl
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{
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namespace copyleft
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{
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namespace cgal
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{
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// Given a triangle mesh (V,F) compute a new mesh (VV,FF) which is the same
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// as (V,F) except that any self-intersecting triangles in (V,F) have been
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// subdivided (new vertices and face created) so that the self-intersection
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// contour lies exactly on edges in (VV,FF). New vertices will appear in
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// original faces or on original edges. New vertices on edges are "merged"
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// only across original faces sharing that edge. This means that if the input
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// triangle mesh is a closed manifold the output will be too.
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//
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// Inputs:
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// V #V by 3 list of vertex positions
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// F #F by 3 list of triangle indices into V
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// params struct of optional parameters
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// Outputs:
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// VV #VV by 3 list of vertex positions
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// FF #FF by 3 list of triangle indices into VV
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// IF #intersecting face pairs by 2 list of intersecting face pairs,
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// indexing F
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// J #FF list of indices into F denoting birth triangle
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// IM #VV list of indices into VV of unique vertices.
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//
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// Known bugs: If an existing edge in (V,F) lies exactly on another face then
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// any resulting additional vertices along that edge may not get properly
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// connected so that the output mesh has the same global topology. This is
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// because
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//
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// Example:
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// // resolve intersections
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// igl::copyleft::cgal::remesh_self_intersections(V,F,params,VV,FF,IF,J,IM);
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// // _apply_ duplicate vertex mapping IM to FF
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// for_each(FF.data(),FF.data()+FF.size(),[&IM](int & a){a=IM(a);});
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// // remove any vertices now unreferenced after duplicate mapping.
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// igl::remove_unreferenced(VV,FF,SV,SF,UIM);
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// // Now (SV,SF) is ready to extract outer hull
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// igl::copyleft::cgal::outer_hull(SV,SF,G,J,flip);
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//
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template <
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typename DerivedV,
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typename DerivedF,
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typename DerivedVV,
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typename DerivedFF,
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typename DerivedIF,
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typename DerivedJ,
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typename DerivedIM>
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IGL_INLINE void remesh_self_intersections(
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const Eigen::MatrixBase<DerivedV> & V,
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const Eigen::MatrixBase<DerivedF> & F,
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const RemeshSelfIntersectionsParam & params,
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Eigen::PlainObjectBase<DerivedVV> & VV,
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Eigen::PlainObjectBase<DerivedFF> & FF,
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Eigen::PlainObjectBase<DerivedIF> & IF,
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Eigen::PlainObjectBase<DerivedJ> & J,
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Eigen::PlainObjectBase<DerivedIM> & IM);
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}
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}
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}
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#ifndef IGL_STATIC_LIBRARY
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# include "remesh_self_intersections.cpp"
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#endif
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#endif
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