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Enhance GH example

This commit is contained in:
Mael Rouxel-Labbé 2022-03-14 20:51:33 +01:00
parent 5b34e6a925
commit 1020a401c1
1 changed files with 55 additions and 31 deletions
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86
Surface_mesh_simplification/examples/Surface_mesh_simplification/edge_collapse_garland_heckbert.cpp
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@ -1,14 +1,14 @@
#include <CGAL/Simple_cartesian.h>
#include <CGAL/Surface_mesh.h>
#include <CGAL/Surface_mesh_simplification/edge_collapse.h>
#include <CGAL/Surface_mesh_simplification/Policies/Edge_collapse/Count_ratio_stop_predicate.h>
#include <CGAL/Surface_mesh_simplification/Policies/Edge_collapse/Bounded_normal_change_placement.h>
#include <CGAL/Surface_mesh_simplification/Policies/Edge_collapse/GarlandHeckbert_policies.h>
#include <CGAL/Surface_mesh_simplification/edge_collapse.h>
#include <chrono>
#include <iostream>
#include <fstream>
#include <iostream>
#include <vector>
typedef CGAL::Simple_cartesian<double> Kernel;
@ -18,45 +18,31 @@ typedef CGAL::Surface_mesh<Point_3> Surface_mesh;
namespace SMS = CGAL::Surface_mesh_simplification;
int main(int argc, char** argv)
typedef SMS::GarlandHeckbert_plane_policies<Surface_mesh, Kernel> Classic_plane;
typedef SMS::GarlandHeckbert_probabilistic_plane_policies<Surface_mesh, Kernel> Prob_plane;
typedef SMS::GarlandHeckbert_triangle_policies<Surface_mesh, Kernel> Classic_tri;
typedef SMS::GarlandHeckbert_probabilistic_triangle_policies<Surface_mesh, Kernel> Prob_tri;
template <typename GHPolicies>
void collapse_gh(Surface_mesh& mesh,
const double ratio)
{
Surface_mesh surface_mesh;
const std::string filename = (argc > 1) ? argv[1] : CGAL::data_file_path("meshes/cube-meshed.off");
std::ifstream is(filename);
if(!is || !(is >> surface_mesh))
{
std::cerr << "Failed to read input mesh: " << filename << std::endl;
return EXIT_FAILURE;
}
if(!CGAL::is_triangle_mesh(surface_mesh))
{
std::cerr << "Input geometry is not triangulated." << std::endl;
return EXIT_FAILURE;
}
std::cout << "Input mesh has " << num_vertices(surface_mesh) << " nv "
<< num_edges(surface_mesh) << " ne "
<< num_faces(surface_mesh) << " nf" << std::endl;
std::chrono::steady_clock::time_point start_time = std::chrono::steady_clock::now();
const double ratio = (argc > 2) ? std::stod(argv[2]) : 0.2;
SMS::Count_ratio_stop_predicate<Surface_mesh> stop(ratio);
// Garland&Heckbert simplification policies
typedef typename SMS::GarlandHeckbert_plane_policies<Surface_mesh, Kernel> GH_policies;
typedef typename GH_policies::Get_cost GH_cost;
typedef typename GH_policies::Get_placement GH_placement;
typedef typename GHPolicies::Get_cost GH_cost;
typedef typename GHPolicies::Get_placement GH_placement;
typedef SMS::Bounded_normal_change_placement<GH_placement> Bounded_GH_placement;
GH_policies gh_policies(surface_mesh);
GHPolicies gh_policies(mesh);
const GH_cost& gh_cost = gh_policies.get_cost();
const GH_placement& gh_placement = gh_policies.get_placement();
Bounded_GH_placement placement(gh_placement);
std::cout << "Collapsing edges of mesh: " << filename << ", aiming for " << 100 * ratio << "% of the input edges..." << std::endl;
int r = SMS::edge_collapse(surface_mesh, stop,
int r = SMS::edge_collapse(mesh, stop,
CGAL::parameters::get_cost(gh_cost)
.get_placement(placement));
@ -66,9 +52,47 @@ int main(int argc, char** argv)
<< std::chrono::duration_cast<std::chrono::milliseconds>(end_time - start_time).count()
<< "ms" << std::endl;
std::cout << "\nFinished!\n" << r << " edges removed.\n" << surface_mesh.number_of_edges() << " final edges.\n";
std::cout << "\nFinished!\n" << r << " edges removed.\n" << edges(mesh).size() << " final edges.\n";
}
CGAL::IO::write_polygon_mesh((argc > 3) ? argv[3] : "out.off", surface_mesh, CGAL::parameters::stream_precision(17));
// Usage:
// ./command [input] [ratio] [policy] [outpout]
// policy can be "cp" (classic plane), "ct" (classic triangle), "pp" (probabilistic plane), "pt" (probabilistic triangle)
int main(int argc, char** argv)
{
Surface_mesh mesh;
const std::string filename = (argc > 1) ? argv[1] : CGAL::data_file_path("meshes/cube-meshed.off");
if(CGAL::IO::read_polygon_mesh(filename, mesh))
{
std::cerr << "Failed to read input mesh: " << filename << std::endl;
return EXIT_FAILURE;
}
if(!CGAL::is_triangle_mesh(mesh))
{
std::cerr << "Input geometry is not triangulated." << std::endl;
return EXIT_FAILURE;
}
std::cout << "Input mesh has " << num_vertices(mesh) << " nv "
<< num_edges(mesh) << " ne "
<< num_faces(mesh) << " nf" << std::endl;
const double ratio = (argc > 2) ? std::stod(argv[2]) : 0.2;
std::cout << "Collapsing edges of mesh: " << filename << ", aiming for " << 100 * ratio << "% of the input edges..." << std::endl;
const std::string policy = (argc > 3) ? argv[3] : "cp";
if(policy == "cp")
collapse_gh<Classic_plane>(mesh, ratio);
else if(policy == "ct")
collapse_gh<Classic_tri>(mesh, ratio);
else if(policy == "pp")
collapse_gh<Prob_plane>(mesh, ratio);
else
collapse_gh<Prob_tri>(mesh, ratio);
CGAL::IO::write_polygon_mesh((argc > 4) ? argv[4] : "out.off", mesh, CGAL::parameters::stream_precision(17));
return EXIT_SUCCESS;
}