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Update examples

This commit is contained in:
Mael Rouxel-Labbé 2021-12-22 12:40:08 +01:00
parent d964ca4e48
commit c06b0d9dc2
2 changed files with 114 additions and 144 deletions
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2
Surface_mesh_simplification/examples/Surface_mesh_simplification/edge_collapse_garland_heckbert.cpp
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@ -45,7 +45,7 @@ int main(int argc, char** argv)
SMS::Count_ratio_stop_predicate<Surface_mesh> stop(ratio);
// Garland&Heckbert simplification policies
typedef typename SMS::GarlandHeckbert_policies<Surface_mesh, Kernel> GH_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 SMS::Bounded_normal_change_placement<GH_placement> Bounded_GH_placement;

194
Surface_mesh_simplification/examples/Surface_mesh_simplification/gh_statistics.cpp
View File

@ -4,24 +4,23 @@
#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_probabilistic_policies.h>
#include <CGAL/Surface_mesh_simplification/Policies/Edge_collapse/GarlandHeckbert_probabilistic_tri_policies.h>
#include <CGAL/Surface_mesh_simplification/Policies/Edge_collapse/GarlandHeckbert_plane_policies.h>
#include <CGAL/Surface_mesh_simplification/Policies/Edge_collapse/GarlandHeckbert_triangle_policies.h>
#include <CGAL/Surface_mesh_simplification/Policies/Edge_collapse/GarlandHeckbert_policies.h>
#include <CGAL/Surface_mesh_simplification/Policies/Edge_collapse/GarlandHeckbert_probabilistic_plane_policies.h>
#include <CGAL/Surface_mesh_simplification/Policies/Edge_collapse/GarlandHeckbert_probabilistic_triangle_policies.h>
#include <iostream>
#include <fstream>
#include <chrono>
#include <vector>
#include <array>
#include <functional>
#include <CGAL/Polygon_mesh_processing/measure.h>
#include <CGAL/Polygon_mesh_processing/distance.h>
#include <boost/format.hpp>
#include <boost/filesystem.hpp>
#include <CGAL/Polygon_mesh_processing/measure.h>
#include <CGAL/Polygon_mesh_processing/distance.h>
#include <array>
#include <chrono>
#include <iostream>
#include <fstream>
#include <functional>
#include <vector>
/**
* this is a largely undocumented file that was used to gather most statistics
@ -40,10 +39,10 @@ namespace SMS = CGAL::Surface_mesh_simplification;
namespace PMP = CGAL::Polygon_mesh_processing;
namespace fs = boost::filesystem;
typedef SMS::GarlandHeckbert_policies<Surface_mesh, Kernel> Classic_plane;
typedef SMS::GarlandHeckbert_probabilistic_policies<Surface_mesh, Kernel> Prob_plane;
typedef SMS::GarlandHeckbert_plane_policies<Surface_mesh, Kernel> Classic_plane;
typedef SMS::GarlandHeckbert_triangle_policies<Surface_mesh, Kernel> Classic_tri;
typedef SMS::GarlandHeckbert_probabilistic_tri_policies<Surface_mesh, Kernel> Prob_tri;
typedef SMS::GarlandHeckbert_probabilistic_plane_policies<Surface_mesh, Kernel> Prob_plane;
typedef SMS::GarlandHeckbert_probabilistic_triangle_policies<Surface_mesh, Kernel> Prob_tri;
// settings for benchmarking - throw away the first n_burns results and keep the n_samples
// samples
@ -55,15 +54,16 @@ constexpr std::size_t prob_plane_index = 1;
constexpr std::size_t classic_tri_index = 2;
constexpr std::size_t prob_tri_index = 3;
template<typename Policy>
Surface_mesh edge_collapse(Surface_mesh& mesh, double ratio = 0.2)
template <typename Policy>
Surface_mesh edge_collapse(Surface_mesh& mesh,
const double ratio = 0.2)
{
typedef typename Policy::Get_cost Cost;
typedef typename Policy::Get_placement Placement;
typedef SMS::Bounded_normal_change_placement<Placement> Bounded_placement;
const Policy p {mesh, 100};
const Policy p { mesh, 100 };
const Cost& cost = p.get_cost();
const Placement& unbounded_placement = p.get_placement();
@ -73,48 +73,42 @@ Surface_mesh edge_collapse(Surface_mesh& mesh, double ratio = 0.2)
SMS::Count_ratio_stop_predicate<Surface_mesh> stop(ratio);
// collapse edges ignoring result code
SMS::edge_collapse(mesh, stop,
CGAL::parameters::get_cost(cost).get_placement(placement));
SMS::edge_collapse(mesh, stop, CGAL::parameters::get_cost(cost).get_placement(placement));
return mesh;
}
template<typename Policy>
void time_all_vector(const std::vector<Surface_mesh>& meshes, const fs::path& output_file)
template <typename Policy>
void time_all_vector(const fs::path& output_file,
const std::vector<Surface_mesh>& meshes)
{
namespace time = std::chrono;
fs::ofstream out_stream {output_file};
fs::ofstream out_stream { output_file };
// always decimate meshes in this vector to avoid timing the
// copying of the meshes
std::vector<Surface_mesh> temp_meshes = meshes;
for(int i = 0; i < n_burns; ++i)
for(int i=0; i<n_burns; ++i)
{
for(Surface_mesh& mesh : temp_meshes)
{
edge_collapse<Policy>(mesh);
}
}
temp_meshes = meshes;
// measure each run
for(int i = 0; i < n_samples; ++i)
for(int i=0; i<n_samples; ++i)
{
// measure time taken by the edge_collapse function over each mesh individually
time::time_point start_time = time::steady_clock::now();
std::chrono::time_point<std::chrono::steady_clock> start_time = std::chrono::steady_clock::now();
for(Surface_mesh& mesh : temp_meshes)
{
edge_collapse<Policy>(mesh);
}
time::time_point end_time = time::steady_clock::now();
std::chrono::time_point<std::chrono::steady_clock> end_time = std::chrono::steady_clock::now();
// get elapsed time in nanoseconds
unsigned long elapsed_ns = time::duration_cast<time::nanoseconds>
(end_time - start_time).count();
unsigned long elapsed_ns = std::chrono::duration_cast<std::chrono::nanoseconds>(end_time - start_time).count();
// add the elapsed time as data point
out_stream << std::to_string(elapsed_ns) << '\n';
@ -123,17 +117,16 @@ void time_all_vector(const std::vector<Surface_mesh>& meshes, const fs::path& ou
}
}
bool read_from_file(Surface_mesh& mesh, const fs::path& p)
bool read_from_file(const fs::path& p,
Surface_mesh& mesh)
{
fs::ifstream in {p};
fs::ifstream in { p };
// make sure the mesh is empty and ready for the next set of data
mesh.clear();
if (!in || !(in >> mesh))
{
if(!in || !(in >> mesh))
return false;
}
return true;
}
@ -144,7 +137,7 @@ std::vector<std::pair<Surface_mesh, std::string>> get_all_meshes(const fs::path&
std::vector<std::pair<Surface_mesh, std::string>> meshes { };
// read all meshes in the given directory into the vector
if (fs::is_directory(dir))
if(fs::is_directory(dir))
{
fs::directory_iterator end_iter;
Surface_mesh mesh;
@ -153,19 +146,18 @@ std::vector<std::pair<Surface_mesh, std::string>> get_all_meshes(const fs::path&
for(fs::directory_iterator dir_iter(dir); dir_iter != end_iter; ++dir_iter)
{
// look for .off files
if (fs::is_regular_file(dir_iter->status())
&& dir_iter->path().extension() == ".off")
if(fs::is_regular_file(dir_iter->status()) &&
dir_iter->path().extension() == ".off")
{
const fs::path& path = dir_iter->path();
// try to read the file into the surface mesh, upon failure, we continue looping
// iterating through the directory
if (!read_from_file(mesh, path))
if(!read_from_file(path, mesh))
{
std::cerr << "Failed to read input mesh " << path
<< " in directory " << dir << "." << std::endl;
std::cerr << "Failed to read input mesh " << path << " in directory " << dir << "." << std::endl;
}
else if (!CGAL::is_triangle_mesh(mesh))
else if(!CGAL::is_triangle_mesh(mesh))
{
std::cerr << "Input geometry is not triangulated." << std::endl;
}
@ -182,25 +174,23 @@ std::vector<std::pair<Surface_mesh, std::string>> get_all_meshes(const fs::path&
return meshes;
}
template<typename Policy>
template <typename Policy>
void time_policy(const fs::path& dir, const fs::path& output_file)
{
auto vec = get_all_meshes(dir);
std::vector<Surface_mesh> meshes { };
std::vector<Surface_mesh> meshes;
for(const auto& p : vec) {
for(const auto& p : vec)
std::cout << p.second << '\n';
}
// keep the first values from the pair (we don't need the names)(we don't need the names)
std::transform(vec.begin(), vec.end(), std::back_inserter(meshes),
[] (const std::pair<Surface_mesh, std::string>& p) { return p.first; }
);
[] (const std::pair<Surface_mesh, std::string>& p) { return p.first; } );
return time_all_vector<Policy>(meshes, output_file);
return time_all_vector<Policy>(output_file, meshes);
}
template<typename Policy>
template <typename Policy>
double hausdorff_error(const Surface_mesh& mesh, double ratio = 0.2)
{
// an arbitrarily chosen small value
@ -210,12 +200,10 @@ double hausdorff_error(const Surface_mesh& mesh, double ratio = 0.2)
Surface_mesh temp = mesh;
edge_collapse<Policy>(temp, ratio);
return PMP::bounded_error_symmetric_Hausdorff_distance<CGAL::Sequential_tag>
(mesh, temp, error_bound);
return PMP::bounded_error_symmetric_Hausdorff_distance<CGAL::Parallel_if_available_tag>(mesh, temp, error_bound);
}
// calculate approximate Hausdorff errors for all different policies at
// the same decimation ratio
// calculate approximate Hausdorff errors for all different policies at the same decimation ratio
std::array<FT, 4> hausdorff_errors(const Surface_mesh& mesh, double ratio)
{
std::array<FT, 4> ret { {0, 0, 0, 0} };
@ -228,10 +216,10 @@ std::array<FT, 4> hausdorff_errors(const Surface_mesh& mesh, double ratio)
return ret;
}
template<typename InputIt>
void hausdorff_errors_mesh(const Surface_mesh& mesh, const fs::path& out, InputIt begin, InputIt end)
template <typename InputIt>
void hausdorff_errors_mesh(const fs::path& out, const Surface_mesh& mesh, InputIt begin, InputIt end)
{
fs::ofstream out_stream {out};
fs::ofstream out_stream { out };
for(InputIt it = begin; it != end; ++it)
{
@ -240,26 +228,20 @@ void hausdorff_errors_mesh(const Surface_mesh& mesh, const fs::path& out, InputI
out_stream << "ratio: " << *it << '\n';
for(double e : errs)
{
out_stream << std::to_string(e) << '\n';
}
}
}
template<typename InputIt>
void hausdorff_errors_mesh(const fs::path& in, const fs::path& out, InputIt begin, InputIt end)
template <typename InputIt>
void hausdorff_errors_mesh(const fs::path& out, const fs::path& in, InputIt begin, InputIt end)
{
fs::ifstream is {in};
Surface_mesh mesh;
if (!read_from_file(mesh, in))
{
if(!read_from_file(in, mesh))
std::cerr << "Failed to read input mesh " << in << '\n';
}
else
{
hausdorff_errors_mesh(mesh, out, begin, end);
}
hausdorff_errors_mesh(out, mesh, begin, end);
}
void hausdorff_errors_dir(const fs::path& dir, const fs::path& out, double ratio = 0.2)
@ -267,7 +249,7 @@ void hausdorff_errors_dir(const fs::path& dir, const fs::path& out, double ratio
// get a vector of pairs of a mesh and its name by loading all .off files in a directory
const auto meshes = get_all_meshes(dir);
fs::ofstream out_stream {out};
fs::ofstream out_stream { out };
for(auto& p : meshes)
{
@ -276,18 +258,14 @@ void hausdorff_errors_dir(const fs::path& dir, const fs::path& out, double ratio
out_stream << p.second << '\n';
for(double err : errors)
{
out_stream << std::to_string(err) << '\n';
}
}
}
void write_aspect_ratios(fs::ofstream& out, const Surface_mesh& mesh)
{
for(auto face : faces(mesh))
{
out << std::to_string(PMP::face_aspect_ratio(face, mesh)) << '\n';
}
}
void gather_face_aspect_ratio(const fs::path& file, const fs::path& out)
@ -297,10 +275,10 @@ void gather_face_aspect_ratio(const fs::path& file, const fs::path& out)
Surface_mesh pp { };
Surface_mesh pt { };
read_from_file(cp, file);
read_from_file(ct, file);
read_from_file(pp, file);
read_from_file(pt, file);
read_from_file(file, cp);
read_from_file(file, ct);
read_from_file(file, pp);
read_from_file(file, pt);
edge_collapse<Classic_plane>(cp);
edge_collapse<Prob_plane>(pp);
@ -321,40 +299,32 @@ void gather_face_aspect_ratio(const fs::path& file, const fs::path& out)
enum class Mode { time, hausdorff_ratio, hausdorff_mesh, run, apect_ratio };
void time_policy_string(const fs::path& in, const fs::path& out, const std::string& policy) {
if (policy == "classic_plane")
{
void time_policy_string(const fs::path& in, const fs::path& out, const std::string& policy)
{
if(policy == "classic_plane")
time_policy<Classic_plane>(in, out);
}
else if (policy == "prob_plane")
{
else if(policy == "prob_plane")
time_policy<Prob_plane>(in, out);
}
else if (policy == "classic_tri")
{
else if(policy == "classic_tri")
time_policy<Classic_tri>(in, out);
}
else if (policy == "prob_tri")
{
else if(policy == "prob_tri")
time_policy<Prob_tri>(in, out);
}
}
int main(int argc, char* argv[])
{
// default is time
Mode m = Mode::time;
if (argc > 1)
if(argc > 1)
{
std::string input { argv[1] };
if (input == "time")
if(input == "time")
{
m = Mode::time;
if (argc != 5)
if(argc != 5)
{
std::cerr << "Expected 3 arugments to time: [input_dir] [output_file] [policy].\n";
return EXIT_FAILURE;
@ -362,36 +332,36 @@ int main(int argc, char* argv[])
time_policy_string(argv[2], argv[3], argv[4]);
}
else if (input == "ratio")
else if(input == "ratio")
{
m = Mode::hausdorff_ratio;
}
else if (input == "mesh")
else if(input == "mesh")
{
m = Mode::hausdorff_mesh;
}
else if (input == "run")
else if(input == "run")
{
m = Mode::run;
if (argc != 3 && argc != 4)
if(argc != 3 && argc != 4)
{
std::cerr << "Expected 1 (2) argument(s) to run: [input_file] [ratio].\n";
return EXIT_FAILURE;
}
// default init empty mesh
Surface_mesh m { };
Surface_mesh sm;
FT ratio = 0.2;
if (argc == 4) {
if(argc == 4) {
ratio = std::stod(argv[3]);
}
read_from_file(m, argv[2]);
read_from_file(argv[2], sm);
Surface_mesh cp = m;
Surface_mesh pp = m;
Surface_mesh ct = m;
Surface_mesh pt = m;
Surface_mesh cp = sm;
Surface_mesh pp = sm;
Surface_mesh ct = sm;
Surface_mesh pt = sm;
edge_collapse<Classic_plane>(cp, ratio);
edge_collapse<Prob_plane>(pp, ratio);
@ -408,7 +378,7 @@ int main(int argc, char* argv[])
classic_tri_stream << ct;
prob_tri_stream << pt;
}
else if (input == "aspect")
else if(input == "aspect")
{
gather_face_aspect_ratio(argv[2], argv[3]);
}
@ -421,9 +391,9 @@ int main(int argc, char* argv[])
}
}
if (m == Mode::hausdorff_mesh)
if(m == Mode::hausdorff_mesh)
{
if (argc != 3)
if(argc != 3)
{
std::cerr << "Expected 1 argument to mesh: [input_file].\n";
return EXIT_FAILURE;