This repository contains mirrored sources of two implementations of a polygon clipping algorithm, published in 2009 by Martínez et al. Note: a "polygon clipping" algorithm effectively allows for a full set of boolean operations on polygons, such as addition, difference, union and intersection.

The code in cageo141/ is the original C code from Martínez et al., as published on the original microsite about the algorithm, by authors. From the comments in the code, it looks released to Public Domain.

The code in as3polyclip/ is an ActionScript3 port of the code, by Mahir Iqbal. According to the comments in the code, MIT-licensed.

The files in polygons/ are some datafiles which were distributed together with the C code.

The paper.pdf file is the 2009 paper (describing the algorithm), as it was published on the microsite. Please note, that Martínez apparently published a new paper with a new version of the algorithm, in 2013; the code here is of the old, 2009 algorithm. The new one seems behind a paywall as of now.

My attempt at a Go port of the 2009 algorithm is available at: http://github.com/akavel/polyclip-go (the code is based on the AS3 port, and thus MIT-licensed as well).