OffsetCurveSetBuilder.h

00001 /**********************************************************************
00002  * $Id: OffsetCurveSetBuilder.h 1820 2006-09-06 16:54:23Z mloskot $
00003  *
00004  * GEOS - Geometry Engine Open Source
00005  * http://geos.refractions.net
00006  *
00007  * Copyright (C) 2006 Refractions Research Inc.
00008  *
00009  * This is free software; you can redistribute and/or modify it under
00010  * the terms of the GNU Lesser General Public Licence as published
00011  * by the Free Software Foundation. 
00012  * See the COPYING file for more information.
00013  *
00014  **********************************************************************/
00015 
00016 #ifndef GEOS_OP_BUFFER_OFFSETCURVESETBUILDER_H
00017 #define GEOS_OP_BUFFER_OFFSETCURVESETBUILDER_H
00018 
00019 #include <vector>
00020 
00021 // Forward declarations
00022 namespace geos {
00023         namespace geom {
00024                 class Geometry;
00025                 class CoordinateSequence;
00026                 class GeometryCollection;
00027                 class Point;
00028                 class LineString;
00029                 class Polygon;
00030         }
00031         namespace geomgraph {
00032                 class Label;
00033         }
00034         namespace noding {
00035                 class SegmentString;
00036         }
00037         namespace operation {
00038                 namespace buffer {
00039                         class OffsetCurveBuilder;
00040                 }
00041         }
00042 }
00043 
00044 namespace geos {
00045 namespace operation { // geos.operation
00046 namespace buffer { // geos.operation.buffer
00047 
00060 class OffsetCurveSetBuilder {
00061 
00062 private:
00063 
00064         // To keep track of newly-created Labels.
00065         // Labels will be relesed by object dtor
00066         std::vector<geomgraph::Label*> newLabels;
00067 
00068         const geom::Geometry& inputGeom;
00069 
00070         double distance;
00071 
00072         OffsetCurveBuilder& curveBuilder;
00073 
00077         std::vector<noding::SegmentString*> curveList;
00078 
00089         void addCurve(geom::CoordinateSequence *coord, int leftLoc,
00090                         int rightLoc);
00091 
00092         void add(const geom::Geometry& g);
00093 
00094         void addCollection(const geom::GeometryCollection *gc);
00095 
00099         void addPoint(const geom::Point *p);
00100 
00101         void addLineString(const geom::LineString *line);
00102 
00103         void addPolygon(const geom::Polygon *p);
00104 
00123         void addPolygonRing(const geom::CoordinateSequence *coord,
00124                         double offsetDistance, int side, int cwLeftLoc,
00125                         int cwRightLoc);
00126 
00136         bool isErodedCompletely(geom::CoordinateSequence *ringCoord,
00137                         double bufferDistance);
00138 
00157         bool isTriangleErodedCompletely(geom::CoordinateSequence *triangleCoord,
00158                         double bufferDistance);
00159 
00160 public:
00161 
00163         OffsetCurveSetBuilder(const geom::Geometry& newInputGeom,
00164                 double newDistance, OffsetCurveBuilder& newCurveBuilder);
00165 
00167         ~OffsetCurveSetBuilder();
00168 
00178         std::vector<noding::SegmentString*>& getCurves();
00179 
00181         void addCurves(const std::vector<geom::CoordinateSequence*>& lineList,
00182                 int leftLoc, int rightLoc);
00183 
00184 };
00185 
00186 
00187 
00188 } // namespace geos::operation::buffer
00189 } // namespace geos::operation
00190 } // namespace geos
00191 
00192 #endif // ndef GEOS_OP_BUFFER_OFFSETCURVESETBUILDER_H
00193 
00194 /**********************************************************************
00195  * $Log$
00196  * Revision 1.2  2006/05/04 10:15:20  strk
00197  * Doxygen comments
00198  *
00199  * Revision 1.1  2006/03/14 00:19:40  strk
00200  * opBuffer.h split, streamlined headers in some (not all) files in operation/buffer/
00201  *
00202  **********************************************************************/
00203 

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