Function object

docs/app/js/sanddance-app.js:109472–109531

(topology, o2)

    };
}
function object(topology, o2) {
    var transformPoint = (0, _transformJsDefault.default)(topology.transform), arcs1 = topology.arcs;
    function arc(i, points) {
        if (points.length) points.pop();
        for(var a = arcs1[i < 0 ? ~i : i], k = 0, n = a.length; k < n; ++k)points.push(transformPoint(a[k], k));
        if (i < 0) (0, _reverseJsDefault.default)(points, n);
    }
    function point(p) {
        return transformPoint(p);
    }
    function line(arcs) {
        var points = [];
        for(var i = 0, n = arcs.length; i < n; ++i)arc(arcs[i], points);
        if (points.length < 2) points.push(points[0]); // This should never happen per the specification.
        return points;
    }
    function ring(arcs) {
        var points = line(arcs);
        while(points.length < 4)points.push(points[0]); // This may happen if an arc has only two points.
        return points;
    }
    function polygon(arcs) {
        return arcs.map(ring);
    }
    function geometry(o) {
        var type = o.type, coordinates;
        switch(type){
            case "GeometryCollection":
                return {
                    type: type,
                    geometries: o.geometries.map(geometry)
                };
            case "Point":
                coordinates = point(o.coordinates);
                break;
            case "MultiPoint":
                coordinates = o.coordinates.map(point);
                break;
            case "LineString":
                coordinates = line(o.arcs);
                break;
            case "MultiLineString":
                coordinates = o.arcs.map(line);
                break;
            case "Polygon":
                coordinates = polygon(o.arcs);
                break;
            case "MultiPolygon":
                coordinates = o.arcs.map(polygon);
                break;
            default:
                return null;
        }
        return {
            type: type,
            coordinates: coordinates
        };
    }