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A small polygon offsetting library for performing basic polygon shrink or expand operations.

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kjmarshall/polygon-offset

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Caveat Emptor!A simple library that implements basic polygon offsetting (shrink and expand). The general idea is to calculate normal vectors to the polygon line segments and offset the segments in the+/- direction of the normal vector.

Examples

Offset examples:

  • A circle that we shrink by 0.01

- A circle that we expand by 0.01

- A flower that we expand by 0.05

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A small polygon offsetting library for performing basic polygon shrink or expand operations.

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