Home | ClipperLib |

# CleanPolygons

Del.» function CleanPolygons(const Polys: TPaths; Distance: double = 1.415): TPaths;

C++ » void CleanPolygons(const Paths &in_polys, Paths &out_polys, double distance = 1.415);

C++ » void CleanPolygons(Paths &polys, double distance = 1.415);

C# » public static Paths CleanPolygons(Paths polys, double distance = 1.415);

Removes vertices:

- that join co-linear edges, or join edges that are almost co-linear (such that if the vertex was moved no more than the specified distance the edges would be co-linear)
- that are within the specified distance of an adjacent vertex
- that are within the specified distance of a semi-adjacent vertex together with their out-lying vertices

Vertices are semi-adjacent when they are separated by a single (out-lying) vertex.
The distance parameter's default value is approximately √2 so that a vertex will be removed when adjacent or semi-adjacent vertices having their corresponding X and Y coordinates differing by no more than 1 unit. (If the egdes are semi-adjacent the out-lying vertex will be removed too.)
C++ only: This function is overloaded. In the first definition, the in_polys and out_polys parameters can reference the same Paths object though in that case the calling code might be clearer if the second definition (accepting a single Paths parameter) is used.

## See Also

CleanPolygon, SimplifyPolygons

Copyright ©2010-2014 Angus Johnson - Clipper 6.2.1 - Help file built on 1-November-2014