IntersectionPointBuilder.h

/**********************************************************************
 *
 * GEOS - Geometry Engine Open Source
 * http://geos.osgeo.org
 *
 * Copyright (C) 2020 Paul Ramsey <pramsey@cleverelephant.ca>
 *
 * 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.
 *
 **********************************************************************/
 
#pragma once
 
#include <geos/geom/Point.h>
#include <geos/operation/overlayng/OverlayNG.h>
 
#include <geos/export.h>
#include <vector>
#include <memory>
 
// Forward declarations
namespace geos {
namespace geom {
class GeometryFactory;
}
namespace operation {
namespace overlayng {
class OverlayEdge;
class OverlayGraph;
class OverlayLabel;
}
}
}
 
namespace geos {      // geos.
namespace operation { // geos.operation
namespace overlayng { // geos.operation.overlayng
 
class GEOS_DLL IntersectionPointBuilder {
 
private:
 
    // Members
    OverlayGraph* graph;
    const geom::GeometryFactory* geometryFactory;
    std::vector<std::unique_ptr<geom::Point>> points;
    bool isAllowCollapseLines;
 
    // Methods
    void addResultPoints();
 
    bool isResultPoint(OverlayEdge* nodeEdge) const;
    bool isEdgeOf(const OverlayLabel* label, uint8_t i) const;
 
 
public:
 
 
    IntersectionPointBuilder(OverlayGraph* p_graph, const geom::GeometryFactory* geomFact)
        : graph(p_graph)
        , geometryFactory(geomFact)
        , isAllowCollapseLines(!OverlayNG::STRICT_MODE_DEFAULT)
        {}
 
    std::vector<std::unique_ptr<geom::Point>> getPoints();
 
    IntersectionPointBuilder(const IntersectionPointBuilder&) = delete;
    IntersectionPointBuilder& operator=(const IntersectionPointBuilder&) = delete;
 
    void setStrictMode(bool p_isStrictMode)
    {
        isAllowCollapseLines = ! p_isStrictMode;
    }
 
 
};
 
 
} // namespace geos.operation.overlayng
} // namespace geos.operation
} // namespace geos