## PlanarMapDcelHalfedge_2

The PlanarMapDcelHalfedge_2concept is a refinement of the TopologicalMapDcelHalfedge concept. The requirements of the latter are the requirements of the former. In addition the PlanarMapDcelHalfedge_2should contain the following geometric types and methods.

### Types

PlanarMapDcelHalfedge_2::Curve
| a curve associated with the halfedge.

### Operations

Curve | h.curve () | the curve.
void | h.set_curve ( Curve cv)
|  | set the curve in h to cv.