如何将曲面网格变成多面体?

How to turn a Surface Mesh into a Polyhedron?

我已经按照 here 中的建议定义并加载了表面网格:typedef OpenMesh::PolyMesh_ArrayKernelT</* MyTraits*/> Surface_mesh;,但尚未使用此类 算法 Triangulated Surface Mesh Segmentation 我需要一个类似的多面体:

typedef CGAL::Exact_predicates_inexact_constructions_kernel Kernel;
typedef CGAL::Polyhedron_3<Kernel> Polyhedron;

但我不知道如何将一个变成另一个。如何在 CGAL 中执行此操作?

一个简化的演示:

#include <CGAL/Exact_predicates_inexact_constructions_kernel.h>
#include <CGAL/mesh_segmentation.h>
#include <CGAL/Polygon_mesh_processing/connected_components.h>
#include <CGAL/boost/graph/copy_face_graph.h>
#include <OpenMesh/Core/Mesh/PolyMesh_ArrayKernelT.hh>
#include <OpenMesh/Core/IO/MeshIO.hh>
#include <iostream>

typedef CGAL::Exact_predicates_inexact_constructions_kernel Kernel;
typedef CGAL::Polyhedron_3<Kernel> Polyhedron;
typedef OpenMesh::PolyMesh_ArrayKernelT</* MyTraits*/> Surface_mesh;

int main()
{
    // create and read Polyhedron
    Surface_mesh mesh_in, mesh_out;
    Polyhedron mesh;
    OpenMesh::IO::read_mesh( mesh_in, "data/elephant.off");
    CGAL::copy_face_graph(mesh_in, mesh);

    CGAL::copy_face_graph(mesh, mesh_out);
    if (!OpenMesh::IO::write_mesh(mesh_out, "slon.obj"))
    {
        std::cerr << "write error\n";
        exit(1);
    }
}

由于

编译失败

boost_1_63_0\boost/graph/graph_traits.hpp(57): error C2039: vertex_descriptor: is not a member of "OpenMesh::PolyMesh_ArrayKernelT< OpenMesh::DefaultTraits >"

该算法直接使用此 OpenMesh 数据结构,无需复制。但是,如果你碰巧需要复制数据结构,你可以使用函数 CGAL::copy_face_graph().