GEOS
3.6.2
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00001 /********************************************************************** 00002 * 00003 * GEOS - Geometry Engine Open Source 00004 * http://geos.osgeo.org 00005 * 00006 * Copyright (C) 2016 Daniel Baston 00007 * 00008 * This is free software; you can redistribute and/or modify it under 00009 * the terms of the GNU Lesser General Public Licence as published 00010 * by the Free Software Foundation. 00011 * See the COPYING file for more information. 00012 * 00013 ********************************************************************** 00014 * 00015 * Last port: operation/distance/FacetSequence.java (f6187ee2 JTS-1.14) 00016 * 00017 **********************************************************************/ 00018 00019 #ifndef GEOS_OPERATION_DISTANCE_FACETSEQUENCE_H 00020 #define GEOS_OPERATION_DISTANCE_FACETSEQUENCE_H 00021 00022 #include <geos/geom/CoordinateSequence.h> 00023 #include <geos/geom/Envelope.h> 00024 #include <geos/geom/Coordinate.h> 00025 00026 using namespace geos::geom; 00027 00028 namespace geos { 00029 namespace operation { 00030 namespace distance { 00031 class FacetSequence { 00032 private: 00033 const CoordinateSequence *pts; 00034 const size_t start; 00035 const size_t end; 00036 00037 /* Unlike JTS, we store the envelope in the FacetSequence so that it has a clear owner. This is 00038 * helpful when making a tree of FacetSequence objects (FacetSequenceTreeBuilder) 00039 * */ 00040 Envelope env; 00041 00042 double computeLineLineDistance(const FacetSequence & facetSeq) const; 00043 00044 double computePointLineDistance(const Coordinate & pt, const FacetSequence & facetSeq) const; 00045 00046 void computeEnvelope(); 00047 00048 public: 00049 const Envelope * getEnvelope() const; 00050 00051 const Coordinate * getCoordinate(size_t index) const; 00052 00053 size_t size() const; 00054 00055 bool isPoint() const; 00056 00057 double distance(const FacetSequence & facetSeq); 00058 00059 FacetSequence(const CoordinateSequence *pts, size_t start, size_t end); 00060 }; 00061 00062 } 00063 } 00064 } 00065 00066 #endif //GEOS_OPERATION_DISTANCE_FACETSEQUENCE_H