function polygonGetCutEdges(polygon) {
    var min=[], tmp1=[], tmp2=[], tmpPoly = [];
    var nDiags = Number.MAX_VALUE;

    for (var i = 0; i < polygon.length; ++i) {
        if (polygonIsReflex(polygon, i)) {
            for (var j = 0; j < polygon.length; ++j) {
                if (polygonCanSee(polygon, i, j)) {
                    tmp1 = polygonGetCutEdges(polygonCopy(polygon, i, j, tmpPoly));
                    tmp2 = polygonGetCutEdges(polygonCopy(polygon, j, i, tmpPoly));

                    for(var k=0; k<tmp2.length; k++){
                        tmp1.push(tmp2[k]);
                    }

                    if (tmp1.length < nDiags) {
                        min = tmp1;
                        nDiags = tmp1.length;
                        min.push([polygonAt(polygon, i), polygonAt(polygon, j)]);
                    }
                }
            }
        }
    }

    return min;
}
Decomposes the polygon into convex pieces. Returns a list of edges [[p1,p2],[p2,p3],...] that cuts the polygon.
Note that this algorithm has complexity O(N^4) and will be very slow for polygons with many vertices.
@method getCutEdges
@return {Array}