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add get_property_map to get either the internal pmap or cgal_no_property

This commit is contained in:
Jane Tournois 2016-08-05 12:55:40 +02:00
parent d1da692ce7
commit 7e1fab420a
1 changed files with 37 additions and 1 deletions
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38
Polygon_mesh_processing/include/CGAL/Polygon_mesh_processing/internal/named_params_helper.h
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@ -25,6 +25,8 @@
#include <CGAL/Polygon_mesh_processing/internal/named_function_params.h>
#include <CGAL/property_map.h>
#include <CGAL/boost/graph/properties.h>
#include <boost/mpl/if.hpp>
// shortcut for accessing the value type of the property map
template <class Graph, class Property>
@ -56,6 +58,40 @@ public:
> ::type type;
};
template<typename PolygonMesh, typename PropertyTag>
class property_map_selector
{
public:
typedef typename boost::graph_has_property<PolygonMesh, PropertyTag>::type Has_internal_pmap;
typedef typename boost::mpl::if_c< Has_internal_pmap::value
, typename boost::property_map<PolygonMesh, PropertyTag>::type
, typename boost::cgal_no_property::type
>::type type;
type get_pmap(const PropertyTag& p, const PolygonMesh& pmesh)
{
return get_impl(p, pmesh, Has_internal_pmap());
}
private:
type get_impl(const PropertyTag& p, const PolygonMesh& pmesh, CGAL::Tag_false)
{
return type(); //boost::cgal_no_property::type
}
type get_impl(const PropertyTag& p, const PolygonMesh& pmesh, CGAL::Tag_true)
{
return get(p, pmesh);
}
};
template<typename PolygonMesh, typename PropertyTag>
typename property_map_selector<PolygonMesh, PropertyTag>::type
get_property_map(const PropertyTag& p, const PolygonMesh& pmesh)
{
property_map_selector<PolygonMesh, PropertyTag> pms;
return pms.get_pmap(p, pmesh);
}
template<typename PolygonMesh, typename NamedParameters>
class GetVertexPointMap
{
@ -79,7 +115,7 @@ public:
template<typename PolygonMesh, typename NamedParameters>
class GetFaceIndexMap
{
typedef typename boost::property_map < PolygonMesh, boost::face_index_t>::type DefaultMap;
typedef typename property_map_selector<PolygonMesh, boost::face_index_t>::type DefaultMap;
public:
typedef typename boost::lookup_named_param_def <
boost::face_index_t,