\( \newcommand{\E}{\mathrm{E}} \) \( \newcommand{\A}{\mathrm{A}} \) \( \newcommand{\R}{\mathrm{R}} \) \( \newcommand{\N}{\mathrm{N}} \) \( \newcommand{\Q}{\mathrm{Q}} \) \( \newcommand{\Z}{\mathrm{Z}} \) \( \def\ccSum #1#2#3{ \sum_{#1}^{#2}{#3} } \def\ccProd #1#2#3{ \sum_{#1}^{#2}{#3} }\)

CGAL 4.8 - 2D Straight Skeleton and Polygon Offsetting

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StraightSkeleton_2 Concept Reference
Concepts

## Definition

The concept `StraightSkeleton_2` describes the requirements for the data structure used to represent a straight skeleton. It refines the concept `HalfedgeDS` and adds additional requirements on the nested types `Vertex`, `Halfedge`, and `Face` of the halfedge data structure.

Refines:
  `HalfedgeDS`

Has Models:
  CGAL::Straight_skeleton_2

Attention
  This concept explicitly protects all the modifying operations of the base `HalfedgeDS` concept. Only the algorithm classes, or clients explicitly bypassing the protection mechanism, can modify a straight skeleton.

## Types
typedef unspecified_type | Vertex
| A model of the `StraightSkeletonVertex_2` concept used to represent the vertices of the straight skeleton.
typedef unspecified_type | Halfedge
| A model of the `StraightSkeletonHalfedge_2` concept used to represent the halfedges of the straight skeleton.
typedef unspecified_type | Face
| Any model of the `StraightSkeletonFace_2` concept used to represent the faces of the straight skeleton.