92 lines
2.6 KiB
C++
92 lines
2.6 KiB
C++
/**********************************************************************
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*
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* GEOS - Geometry Engine Open Source
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* http://geos.osgeo.org
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*
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* Copyright (C) 2011 Sandro Santilli <strk@kbt.io>
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* Copyright (C) 2006 Refractions Research Inc.
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*
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* This is free software; you can redistribute and/or modify it under
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* the terms of the GNU Lesser General Public Licence as published
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* by the Free Software Foundation.
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* See the COPYING file for more information.
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*
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**********************************************************************
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*
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* Last port: operation/predicate/SegmentIntersectionTester.java r378 (JTS-1.12)
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*
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**********************************************************************/
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#pragma once
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#include <geos/export.h>
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#include <geos/algorithm/LineIntersector.h> // for composition
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#include <geos/geom/Coordinate.h> // for composition
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// Forward declarations
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namespace geos {
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namespace geom {
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class LineString;
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class CoordinateSequence;
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}
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}
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namespace geos {
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namespace operation { // geos::operation
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namespace predicate { // geos::operation::predicate
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/** \brief
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* Tests if any line segments in two sets of CoordinateSequences intersect.
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*
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* The algorithm is optimized for use when the first input has smaller extent
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* than the set of test lines.
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* The code is short-circuited to return as soon an intersection is found.
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*
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*/
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class GEOS_DLL SegmentIntersectionTester {
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private:
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/// \brief
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/// For purposes of intersection testing,
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/// don't need to set precision model
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///
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algorithm::LineIntersector li; // Robust
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bool hasIntersectionVar;
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public:
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SegmentIntersectionTester(): hasIntersectionVar(false) {}
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bool hasIntersectionWithLineStrings(const geom::LineString& line,
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const std::vector<const geom::LineString*>& lines);
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bool hasIntersection(const geom::LineString& line,
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const geom::LineString& testLine);
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/**
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* Tests the segments of a LineString against the segs in
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* another LineString for intersection.
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* Uses the envelope of the query LineString
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* to filter before testing segments directly.
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* This is optimized for the case when the query
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* LineString is a rectangle.
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*
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* Testing shows this is somewhat faster than not checking the envelope.
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*
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* @param line
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* @param testLine
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* @return
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*/
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bool hasIntersectionWithEnvelopeFilter(const geom::LineString& line,
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const geom::LineString& testLine);
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};
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} // namespace geos::operation::predicate
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} // namespace geos::operation
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} // namespace geos
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