CGAL 6.1.2 - 3D Envelopes: CGAL::Envelope_diagram_2< EnvTraits >::Halfedge Class Reference

CGAL 6.1.2 - 3D Envelopes

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CGAL::Envelope_diagram_2< EnvTraits >::Halfedge Class Reference

`#include <CGAL/envelope_3.h>`

## Inherits from

CGAL::Arrangement_on_surface_2< typename GeometryTraits, typename TopologyTraits >::Halfedge.

## Access Functions
size_t | number_of_surfaces () const
| returns the number of \( xy\)-monotone surfaces that induce the halfedge.
Surface_const_iterator | surfaces_begin () const
| returns an iterator for the first \( xy\)-monotone surface that induces the halfedge.
Surface_const_iterator | surfaces_end () const
| returns a past-the-end iterator for the \( xy\)-monotone surfaces that induce the halfedge.
Xy_monotone_surface_3 | surface () const
| returns the first \( xy\)-monotone surface that induce `e`.

## Additional Inherited Members
Public Member Functions inherited from CGAL::Arrangement_on_surface_2< typename GeometryTraits, typename TopologyTraits >::Halfedge
| Halfedge ()
bool | is_fictitious () const
Vertex_handle | source ()
Vertex_handle | target ()
Arr_halfedge_direction | direction () const
Face_handle | face ()
Halfedge_handle | twin ()
Halfedge_handle | prev ()
Halfedge_handle | next ()
Ccb_halfedge_circulator | ccb ()
const Traits::X_monotone_curve_2 & | curve () const

## Member Function Documentation

## ◆ surface()

template<typename EnvTraits >

Xy_monotone_surface_3 CGAL::Envelope_diagram_2< EnvTraits >::Halfedge::surface | ( |  | ) | const

returns the first \( xy\)-monotone surface that induce `e`.

Precondition
  The number of surfaces is not 0.