InvalidSegmentDetector.h

/**********************************************************************
 *
 * GEOS - Geometry Engine Open Source
 * http://geos.osgeo.org
 *
 * Copyright (C) 2022 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/noding/SegmentIntersector.h>
 
// Forward declarations
namespace geos {
namespace geom {
class Coordinate;
}
namespace noding {
class SegmentString;
}
namespace coverage {
class CoverageRing;
}
}
 
namespace geos {      // geos.
namespace coverage { // geos.coverage

class GEOS_DLL InvalidSegmentDetector : public geos::noding::SegmentIntersector {
    using SegmentString = geos::noding::SegmentString;
    using Coordinate = geos::geom::Coordinate;
 
private:
 
    // Members
    double distanceTol;
 
    // Methods
    bool isInvalid(const Coordinate& tgt0, const Coordinate& tgt1,
        const Coordinate& adj0, const Coordinate& adj1,
        CoverageRing* adj, std::size_t indexAdj);
 
    bool isEqual(
        const Coordinate& t0, const Coordinate& t1,
        const Coordinate& adj0, const Coordinate& adj1);

    bool isCollinearOrInterior(
        const Coordinate& tgt0, const Coordinate& tgt1,
        const Coordinate& adj0, const Coordinate& adj1,
        CoverageRing* adj, std::size_t indexAdj);
 
    bool isInteriorSegment(
        const Coordinate& intVertex,
        const Coordinate& tgt0, const Coordinate& tgt1,
        CoverageRing* adj, std::size_t indexAdj);
 
    static bool isNearlyParallel(
        const Coordinate& p00, const Coordinate& p01,
        const Coordinate& p10, const Coordinate& p11,
        double distanceTol);
 
 
public:

    InvalidSegmentDetector() {};
 
    InvalidSegmentDetector(double p_distanceTol)
        : distanceTol(p_distanceTol) {};
 
 
    bool isDone() const override {
        // process all intersections
        return false;
    };

    void processIntersections(
        SegmentString* ssAdj,    std::size_t iAdj,
        SegmentString* ssTarget, std::size_t iTarget) override;
 
 
 
};
 
} // namespace geos.coverage
} // namespace geos