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Merge pull request #6081 from MaelRL/PMP-PM_to_PS_array_point-GF 

Allow polygon soups to use an `std::array` point type in PM_to_PS
This commit is contained in:
Laurent Rineau 2022-01-12 12:21:55 +01:00
parent 398e71d37d 00cd63f209
commit 12028fed4a
1 changed files with 31 additions and 1 deletions
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32
Polygon_mesh_processing/include/CGAL/Polygon_mesh_processing/polygon_mesh_to_polygon_soup.h
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@ -16,6 +16,7 @@
#include <CGAL/license/Polygon_mesh_processing/repair.h>
#include <CGAL/algorithm.h>
#include <CGAL/assertions.h>
#include <CGAL/boost/graph/iterator.h>
#include <CGAL/boost/graph/Named_function_parameters.h>
#include <CGAL/boost/graph/named_params_helper.h>
@ -26,8 +27,33 @@
#include <boost/range/value_type.hpp>
#include <boost/range/reference.hpp>
#include <array>
#include <type_traits>
namespace CGAL {
namespace Polygon_mesh_processing {
namespace internal {
template <typename PM_Point, typename PS_Point>
struct PM_to_PS_point_converter
{
PS_Point operator()(const PM_Point& p) const
{
CGAL_static_assertion((std::is_convertible<PM_Point, PS_Point>::value));
return PS_Point(p);
}
};
template <typename PM_Point, typename PS_FT>
struct PM_to_PS_point_converter<PM_Point, std::array<PS_FT, 3> >
{
std::array<PS_FT, 3> operator()(const PM_Point& p) const
{
return { p[0], p[1], p[2] };
}
};
} // namespace internal
/// \ingroup PMP_repairing_grp
///
@ -84,20 +110,24 @@ void polygon_mesh_to_polygon_soup(const PolygonMesh& mesh,
typedef typename GetVertexPointMap<PolygonMesh, NamedParameters>::const_type VPM;
VPM vpm = choose_parameter(get_parameter(np, internal_np::vertex_point),
get_const_property_map(vertex_point, mesh));
typedef typename boost::property_traits<VPM>::value_type PM_Point;
typedef CGAL::dynamic_vertex_property_t<std::size_t> Vertex_index;
typedef typename boost::property_map<PolygonMesh, Vertex_index>::const_type VIM;
VIM vim = get(Vertex_index(), mesh);
typedef typename boost::range_value<PointRange>::type PS_Point;
typedef typename boost::range_value<PolygonRange>::type Polygon;
internal::PM_to_PS_point_converter<PM_Point, PS_Point> converter;
std::size_t index = points.size(); // so that multiple meshes can be put into the same soup
CGAL::internal::reserve(points, points.size() + vertices(mesh).size());
CGAL::internal::reserve(polygons, polygons.size() + faces(mesh).size());
for(const vertex_descriptor v : vertices(mesh))
{
points.emplace_back(get(vpm, v));
points.push_back(converter(get(vpm, v)));
put(vim, v, index++);
}