Examples with PolygonBuilder com.revolsys.geometry.operation.overlay.PolygonBuilder used on opensource projects

Example 1 with PolygonBuilder

use of com.revolsys.geometry.operation.overlay.PolygonBuilder in project com.revolsys.open by revolsys.

the class Buffer method buffer.

private static Geometry buffer(final Noder noder, final GeometryFactory precisionModel, final Geometry geometry, final double distance, final BufferParameters parameters) {
    final GeometryFactory geometryFactory = geometry.getGeometryFactory();
    final OffsetCurveSetBuilder curveSetBuilder = new OffsetCurveSetBuilder(geometry, distance, precisionModel, parameters);
    final List<NodedSegmentString> curves = curveSetBuilder.getCurves();
    if (curves.size() == 0) {
        return geometryFactory.polygon();
    } else {
        final EdgeList edgeList = new EdgeList();
        computeNodedEdges(noder, edgeList, curves);
        final PlanarGraph graph = new PlanarGraph(new OverlayNodeFactory());
        final List<Edge> edges = edgeList.getEdges();
        graph.addEdges(edges);
        final List<BufferSubgraph> subgraphList = newSubgraphs(graph);
        final PolygonBuilder polyBuilder = new PolygonBuilder(geometryFactory);
        buildSubgraphs(subgraphList, polyBuilder);
        final List<Polygon> polygons = polyBuilder.getPolygons();
        if (polygons.size() == 0) {
            return geometryFactory.polygon();
        } else {
            final Geometry resultGeom = geometryFactory.buildGeometry(polygons);
            return resultGeom;
        }
    }
}