PolygonBuilder.h

/**********************************************************************
 *
 * GEOS - Geometry Engine Open Source
 * http://geos.osgeo.org
 *
 * Copyright (C) 2006 Refractions Research Inc.
 *
 * This is free software; you can redistribute and/or modify it under
 * the terms of the GNU Lesser General Public Licence as published
 * by the Free Software Foundation. 
 * See the COPYING file for more information.
 *
 **********************************************************************
 *
 * Last port: operation/overlay/PolygonBuilder.java rev. 1.20 (JTS-1.10)
 *
 **********************************************************************/
 
#ifndef GEOS_OP_OVERLAY_POLYGONBUILDER_H
#define GEOS_OP_OVERLAY_POLYGONBUILDER_H
 
#include <geos/export.h>
 
#include <vector>
 
#ifdef _MSC_VER
#pragma warning(push)
#pragma warning(disable: 4251) // warning C4251: needs to have dll-interface to be used by clients of class
#endif
 
// Forward declarations
namespace geos {
        namespace geom {
                class Geometry;
                class Coordinate;
                class GeometryFactory;
        }
        namespace geomgraph {
                class EdgeRing;
                class Node;
                class PlanarGraph;
                class DirectedEdge;
        }
        namespace operation {
                namespace overlay {
                        class MaximalEdgeRing;
                        class MinimalEdgeRing;
                }
        }
}
 
namespace geos {
namespace operation { // geos::operation
namespace overlay { // geos::operation::overlay

class GEOS_DLL PolygonBuilder {
public:
 
        PolygonBuilder(const geom::GeometryFactory *newGeometryFactory);
 
        ~PolygonBuilder();

        void add(geomgraph::PlanarGraph *graph);
            // throw(const TopologyException &)

        void add(const std::vector<geomgraph::DirectedEdge*> *dirEdges,
                        const std::vector<geomgraph::Node*> *nodes);
                        // throw(const TopologyException &)
 
        std::vector<geom::Geometry*>* getPolygons();

        bool containsPoint(const geom::Coordinate& p);
 
private:
 
        const geom::GeometryFactory *geometryFactory;
 
        std::vector<geomgraph::EdgeRing*> shellList;

        void buildMaximalEdgeRings(
                const std::vector<geomgraph::DirectedEdge*> *dirEdges,
                std::vector<MaximalEdgeRing*> &maxEdgeRings);
                        // throw(const TopologyException &)
 
        void buildMinimalEdgeRings(
                std::vector<MaximalEdgeRing*> &maxEdgeRings,
                std::vector<geomgraph::EdgeRing*> &newShellList,
                std::vector<geomgraph::EdgeRing*> &freeHoleList,
                std::vector<MaximalEdgeRing*> &edgeRings);

        geomgraph::EdgeRing* findShell(std::vector<MinimalEdgeRing*>* minEdgeRings);

        void placePolygonHoles(geomgraph::EdgeRing *shell,
                std::vector<MinimalEdgeRing*> *minEdgeRings);

        void sortShellsAndHoles(std::vector<MaximalEdgeRing*> &edgeRings,
                std::vector<geomgraph::EdgeRing*> &newShellList,
                std::vector<geomgraph::EdgeRing*> &freeHoleList);

        void placeFreeHoles(std::vector<geomgraph::EdgeRing*>& newShellList,
                std::vector<geomgraph::EdgeRing*>& freeHoleList);
                // throw(const TopologyException&)

        geomgraph::EdgeRing* findEdgeRingContaining(geomgraph::EdgeRing *testEr,
                std::vector<geomgraph::EdgeRing*>& newShellList);
 
        std::vector<geom::Geometry*>* computePolygons(
                        std::vector<geomgraph::EdgeRing*>& newShellList);

 
};
 
} // namespace geos::operation::overlay
} // namespace geos::operation
} // namespace geos
 
#ifdef _MSC_VER
#pragma warning(pop)
#endif
 
#endif // ndef GEOS_OP_OVERLAY_POLYGONBUILDER_H