PointBuilder.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/PointBuilder.java rev. 1.16 (JTS-1.10)
 *
 **********************************************************************/
 
#pragma once
 
#include <geos/export.h>
 
#include <geos/geom/GeometryFactory.h> // for inlines
#include <geos/operation/overlay/OverlayOp.h> // for OpCode enum
 
#include <vector>
 
// Forward declarations
namespace geos {
namespace geom {
class GeometryFactory;
class Point;
}
namespace geomgraph {
class Node;
}
namespace algorithm {
class PointLocator;
}
namespace operation {
namespace overlay {
class OverlayOp;
}
}
}
 
namespace geos {
namespace operation { // geos::operation
namespace overlay { // geos::operation::overlay
 
class GEOS_DLL PointBuilder {
private:
 
    OverlayOp* op;
    const geom::GeometryFactory* geometryFactory;
    void extractNonCoveredResultNodes(OverlayOp::OpCode opCode);
 
    /*
     * Converts non-covered nodes to Point objects and adds them to
     * the result.
     *
     * A node is covered if it is contained in another element Geometry
     * with higher dimension (e.g. a node point might be contained in
     * a polygon, in which case the point can be eliminated from
     * the result).
     *
     * @param n the node to test
     */
    void filterCoveredNodeToPoint(const geomgraph::Node*);
 
    std::vector<geom::Point*>* resultPointList;
 
    PointBuilder(const PointBuilder&) = delete;
    PointBuilder& operator=(const PointBuilder&) = delete;
 
public:
 
    PointBuilder(OverlayOp* newOp,
                 const geom::GeometryFactory* newGeometryFactory,
                 algorithm::PointLocator* newPtLocator = nullptr)
        :
        op(newOp),
        geometryFactory(newGeometryFactory),
        resultPointList(new std::vector<geom::Point *>())
    {
        ::geos::ignore_unused_variable_warning(newPtLocator);
    }
 
    std::vector<geom::Point*>* build(OverlayOp::OpCode opCode);
};
 
 
} // namespace geos::operation::overlay
} // namespace geos::operation
} // namespace geos