CGAL::Env_surface_data_traits_3< Traits, XyData, SData, Cnv > Class Template Reference

#include <CGAL/Env_surface_data_traits_3.h>

Inherits from

Traits.

Definition

template<typename Traits, typename XyData, typename SData, typename Cnv>
class CGAL::Env_surface_data_traits_3< Traits, XyData, SData, Cnv >

The class Env_surface_data_traits_3 is a model of the EnvelopeTraits_3 concept and serves as a decorator class that allows the extension of the surfaces defined by the base traits-class (the Traits parameter), which serves as a geometric traits-class (a model of the EnvelopeTraits_3 concept), with extraneous (non-geometric) data fields.

The traits-class decorator extends the Surface_3 and the Xy_monotone_surface_3 types as detailed below. Each Surface_3 object is associated with a single data field of type SData, and each Xy_monotone_surface_3 object is associated with a single data field of type XyData. When a surface is subdivided into \( xy\)-monotone surfaces, its data field is converted using the conversion functor, which is specified by the Cnv template-parameter, and the resulting objects is copied to all Xy_monotone_surface_3 objects induced by this surface. The conversion functor should provide an operator with the following prototype:

XyData operator() (const SData& d) const;

By default, the two data types are the same, so the conversion operator is trivial and just copies the data object:

SData =	XyData
Cnv =	_Default_convert_functor<SData,XyData>

Is model of

EnvelopeTraits_3

Examples

Envelope_3/envelope_triangles.cpp.

Classes
class	Surface_3
	The Surface_3 class nested within the surface-data traits extends the Base_traits_3::Surface_3 type with an extra data field. More...
class	Xy_monotone_surface_3
	The Xy_monotone_surface_3 class nested within the surface-data traits extends the Base_traits_3::Xy_monotone_surface_3 type with an extra data field. More...

Types
typedef Traits	Base_traits_3
	the base traits-class.
typedef Base_traits_3::Surface_3	Base_surface_3
	the base surface.
typedef Base_traits_3::Xy_monotone_surface_3	Base_xy_monotone_surface_3
	the base \( xy\)-monotone surface surface.
typedef Cnv	Convert
	the conversion functor.
typedef SData	Surface_data
	the type of data associated with surfaces.
typedef XyData	Xy_monotone_surface_data
	the type of data associated with \( xy\)-monotone surfaces.