CGAL 5.6.3 - Polygon Mesh Processing

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Polygon_mesh_processing/extrude.cpp
#include <CGAL/Surface_mesh.h>
#include <CGAL/Exact_predicates_inexact_constructions_kernel.h>
#include <CGAL/Polygon_mesh_processing/compute_normal.h>
#include <CGAL/Polygon_mesh_processing/extrude.h>
#include <CGAL/boost/graph/IO/polygon_mesh_io.h>
#include <iostream>
#include <fstream>
#include <string>
typedef CGAL::Exact_predicates_inexact_constructions_kernel Kernel;
typedef CGAL::Surface_mesh<Kernel::Point_3> SM;
typedef boost::graph_traits<SM>::vertex_descriptor vertex_descriptor;
typedef Kernel::Vector_3 Vector;
typedef boost::property_map<SM, CGAL::vertex_point_t>::type VPMap;
typedef SM::template Property_map<vertex_descriptor, Vector> VNMap;
struct Bottom
{
Bottom(VPMap pmap, VNMap nmap, double vlen)
: pmap(pmap), nmap(nmap), vlen(vlen)
{}
void operator()(const vertex_descriptor& vin, const vertex_descriptor vout) const
{
put(pmap, vout, get(pmap, vout) - vlen* get(nmap, vin));
}
VPMap pmap;
VNMap nmap;
double vlen;
};
struct Top
{
Top(VPMap pmap, VNMap nmap, double vlen)
: pmap(pmap), nmap(nmap), vlen(vlen)
{}
void operator()(const vertex_descriptor& vin, const vertex_descriptor vout) const
{
put(pmap, vout, get(pmap, vout) + vlen* get(nmap, vin));
}
VPMap pmap;
VNMap nmap;
double vlen;
};
int main(int argc, char* argv[])
{
SM in, out;
std::string filename = (argc > 1) ? std::string(argv[1]) : CGAL::data_file_path("meshes/cube-ouvert.off");
double vlen = (argc > 2) ? std::stod(argv[2]) : 0.1;
CGAL::IO::read_polygon_mesh(filename, in);
VNMap vnormals = in.template add_property_map<vertex_descriptor, Vector>("v:normal", CGAL::NULL_VECTOR).first;
CGAL::Polygon_mesh_processing::compute_vertex_normals(in, vnormals);
Bottom bottom(get(CGAL::vertex_point,out), vnormals, vlen);
Top top(get(CGAL::vertex_point,out), vnormals, vlen);
CGAL::Polygon_mesh_processing::extrude_mesh(in, out, bottom, top);
filename = filename.substr(filename.find_last_of("/") + 1, filename.length() - 1);
filename = filename.substr(0, filename.find_last_of("."));
filename = filename + "_" + std::to_string(vlen) + ".off";
CGAL::IO::write_polygon_mesh(filename, out, CGAL::parameters::stream_precision(17));
return 0;
}
CGAL::Exact_predicates_inexact_constructions_kernel
CGAL::Surface_mesh
Kernel::Vector_3
CGAL::Polygon_mesh_processing::extrude_mesh
void extrude_mesh(const InputMesh &input, OutputMesh &output, const BottomFunctor &bot, const TopFunctor &top, const NamedParameters1 &np_in=parameters::default_values(), const NamedParameters2 &np_out=parameters::default_values())
performs a generalized extrusion of input and puts it in output.
Definition: extrude.h:164
CGAL::Polygon_mesh_processing::compute_vertex_normals
void compute_vertex_normals(const PolygonMesh &pmesh, VertexNormalMap vertex_normals, const NamedParameters &np=parameters::default_values())
computes the outward unit vector normal for all vertices of the polygon mesh.
Definition: compute_normal.h:787
CGAL::IO::read_polygon_mesh
bool read_polygon_mesh(const std::string &fname, Graph &g, const NamedParameters &np=parameters::default_values())
CGAL::IO::write_polygon_mesh
bool write_polygon_mesh(const std::string &fname, Graph &g, const NamedParameters &np=parameters::default_values())
CGAL::NULL_VECTOR
const CGAL::Null_vector NULL_VECTOR
Kernel