BambuStudio/libigl/igl/copyleft/cgal/remesh_self_intersections.h

82 lines
3.2 KiB
C
Raw Normal View History

2024-12-20 06:44:50 +00:00
// This file is part of libigl, a simple c++ geometry processing library.
//
// Copyright (C) 2014 Alec Jacobson <alecjacobson@gmail.com>
//
// This Source Code Form is subject to the terms of the Mozilla Public License
// v. 2.0. If a copy of the MPL was not distributed with this file, You can
// obtain one at http://mozilla.org/MPL/2.0/.
#ifndef IGL_COPYLEFT_CGAL_REMESH_SELF_INTERSECTIONS_H
#define IGL_COPYLEFT_CGAL_REMESH_SELF_INTERSECTIONS_H
#include "../../igl_inline.h"
#include "RemeshSelfIntersectionsParam.h"
#include <Eigen/Dense>
namespace igl
{
namespace copyleft
{
namespace cgal
{
// Given a triangle mesh (V,F) compute a new mesh (VV,FF) which is the same
// as (V,F) except that any self-intersecting triangles in (V,F) have been
// subdivided (new vertices and face created) so that the self-intersection
// contour lies exactly on edges in (VV,FF). New vertices will appear in
// original faces or on original edges. New vertices on edges are "merged"
// only across original faces sharing that edge. This means that if the input
// triangle mesh is a closed manifold the output will be too.
//
// Inputs:
// V #V by 3 list of vertex positions
// F #F by 3 list of triangle indices into V
// params struct of optional parameters
// Outputs:
// VV #VV by 3 list of vertex positions
// FF #FF by 3 list of triangle indices into VV
// IF #intersecting face pairs by 2 list of intersecting face pairs,
// indexing F
// J #FF list of indices into F denoting birth triangle
// IM #VV list of indices into VV of unique vertices.
//
// Known bugs: If an existing edge in (V,F) lies exactly on another face then
// any resulting additional vertices along that edge may not get properly
// connected so that the output mesh has the same global topology. This is
// because
//
// Example:
// // resolve intersections
// igl::copyleft::cgal::remesh_self_intersections(V,F,params,VV,FF,IF,J,IM);
// // _apply_ duplicate vertex mapping IM to FF
// for_each(FF.data(),FF.data()+FF.size(),[&IM](int & a){a=IM(a);});
// // remove any vertices now unreferenced after duplicate mapping.
// igl::remove_unreferenced(VV,FF,SV,SF,UIM);
// // Now (SV,SF) is ready to extract outer hull
// igl::copyleft::cgal::outer_hull(SV,SF,G,J,flip);
//
template <
typename DerivedV,
typename DerivedF,
typename DerivedVV,
typename DerivedFF,
typename DerivedIF,
typename DerivedJ,
typename DerivedIM>
IGL_INLINE void remesh_self_intersections(
const Eigen::MatrixBase<DerivedV> & V,
const Eigen::MatrixBase<DerivedF> & F,
const RemeshSelfIntersectionsParam & params,
Eigen::PlainObjectBase<DerivedVV> & VV,
Eigen::PlainObjectBase<DerivedFF> & FF,
Eigen::PlainObjectBase<DerivedIF> & IF,
Eigen::PlainObjectBase<DerivedJ> & J,
Eigen::PlainObjectBase<DerivedIM> & IM);
}
}
}
#ifndef IGL_STATIC_LIBRARY
# include "remesh_self_intersections.cpp"
#endif
#endif