Function getPolygonWindingDirection

docs/app/js/sanddance-app.js:101634–101636

(points, options = {})

    return false;
}
function getPolygonWindingDirection(points, options = {}) {
    return Math.sign(getPolygonSignedArea(points, options));
}
function getPolygonSignedArea(points, options = {}) {
    const { start =0 , end =points.length  } = options;
    const dim = options.size || 2;