CGAL 6.2 - 2D Alpha Wrapping: Reference Manual

CGAL 6.2 - 2D Alpha Wrapping

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Reference Manual

##

Pierre Alliez, David Cohen-Steiner, Michael Hemmer, Cédric Portaneri, and Mael Rouxel-Labbé
This component takes a polygon soup, a 2D segment soup, and/or a 2D point set as input, and generates a valid (watertight, intersection-free and 1-manifold) multi-polygon that strictly encloses the input. The algorithm proceeds by shrink-wrapping and refining a 2D Delaunay triangulation starting from a loose bounding box of the input. Two user-defined parameters, alpha and offset, offer control over the maximum size of cavities where the shrink-wrapping process can enter, and the tightness of the final polygon(s) to the input, respectively. Once combined, these parameters provide a means to trade fidelity to the input for complexity of the output.
Introduced in: CGAL 6.2
Depends on: 2D Triangulations and 2D Polygon Repair
BibTeX: cgal:achpr-aw2-26a
License: GPL

## Classified Reference Pages

## Concepts

- `AlphaWrapTraits_2`

## Functions

- `CGAL::alpha_wrap_2()`

## Modules
| Concepts
| Free Functions
| Functions to create a wrap from point clouds, segment soups, and polygons with holes.