MonotoneChainOverlapAction.h

00001 /**********************************************************************
00002  *
00003  * GEOS - Geometry Engine Open Source
00004  * http://geos.osgeo.org
00005  *
00006  * Copyright (C) 2001-2002 Vivid Solutions Inc.
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: index/chain/MonotoneChainOverlapAction.java rev. 1.6 (JTS-1.10)
00016  *
00017  **********************************************************************/
00018 
00019 #ifndef GEOS_IDX_CHAIN_MONOTONECHAINOVERLAPACTION_H
00020 #define GEOS_IDX_CHAIN_MONOTONECHAINOVERLAPACTION_H
00021 
00022 #include <geos/export.h>
00023 #include <geos/geom/LineSegment.h>
00024 #include <geos/geom/Envelope.h>
00025 
00026 
00027 // Forward declarations
00028 namespace geos {
00029         namespace index { 
00030                 namespace chain { 
00031                         class MonotoneChain;
00032                 }
00033         }
00034 }
00035 
00036 namespace geos {
00037 namespace index { // geos::index
00038 namespace chain { // geos::index::chain
00039 
00044 class GEOS_DLL MonotoneChainOverlapAction {
00045 
00046 protected:
00047 
00048         geom::LineSegment overlapSeg1;
00049 
00050         geom::LineSegment overlapSeg2;
00051 
00052 public:
00053 
00054         MonotoneChainOverlapAction() {}
00055 
00056         virtual ~MonotoneChainOverlapAction() {}
00057 
00066         virtual void overlap(MonotoneChain& mc1, std::size_t start1,
00067                              MonotoneChain& mc2, std::size_t start2);
00068 
00075         virtual void overlap(const geom::LineSegment& /*seg1*/,
00076                              const geom::LineSegment& /*seg2*/)
00077         {}
00078 
00079         // these envelopes are used during the MonotoneChain search process
00080         geom::Envelope tempEnv1;
00081         geom::Envelope tempEnv2;
00082 };
00083 
00084 } // namespace geos::index::chain
00085 } // namespace geos::index
00086 } // namespace geos
00087 
00088 #endif // GEOS_IDX_CHAIN_MONOTONECHAINOVERLAPACTION_H
00089 

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