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# BufferParameters.h

    00001 /**********************************************************************
    00002  * $Id: BufferParameters.h 3300 2011-04-27 09:42:13Z strk $
    00003  *
    00004  * GEOS - Geometry Engine Open Source
    00005  * http://geos.refractions.net
    00006  *
    00007  * Copyright (C) 2009  Sandro Santilli <strk@keybit.net>
    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  * Last port: operation/buffer/BufferParameters.java r378 (JTS-1.12)
    00017  *
    00018  **********************************************************************/
    00019
    00020 #ifndef GEOS_OP_BUFFER_BUFFERPARAMETERS_H
    00021 #define GEOS_OP_BUFFER_BUFFERPARAMETERS_H
    00022
    00023 #include <geos/export.h>
    00024
    00025 //#include <vector>
    00026
    00027 //#include <geos/algorithm/LineIntersector.h> // for composition
    00028 //#include <geos/geom/Coordinate.h> // for composition
    00029 //#include <geos/geom/LineSegment.h> // for composition
    00030
    00031 #ifdef _MSC_VER
    00032 #pragma warning(push)
    00033 #pragma warning(disable: 4251) // warning C4251: needs to have dll-interface to be used by clients of class
    00034 #endif
    00035
    00036 // Forward declarations
    00037 namespace geos {
    00038         namespace geom {
    00039                 class CoordinateSequence;
    00040                 class PrecisionModel;
    00041         }
    00042         namespace operation {
    00043                 namespace buffer {
    00044                         class OffsetCurveVertexList;
    00045                 }
    00046         }
    00047 }
    00048
    00049 namespace geos {
    00050 namespace operation { // geos.operation
    00051 namespace buffer { // geos.operation.buffer
    00052
    00058 class GEOS_DLL BufferParameters
    00059 {
    00060
    00061 public:
    00062
    00064         enum EndCapStyle {
    00065
    00067                 CAP_ROUND=1,
    00068
    00070                 CAP_FLAT=2,
    00071
    00073                 CAP_SQUARE=3
    00074         };
    00075
    00077         enum JoinStyle {
    00078
    00080                 JOIN_ROUND=1,
    00081
    00083                 JOIN_MITRE=2,
    00084
    00086                 JOIN_BEVEL=3
    00087         };
    00088
    00092         //
    00097         static const int DEFAULT_QUADRANT_SEGMENTS = 8;
    00098
    00100         //
    00103         static const double DEFAULT_MITRE_LIMIT; // 5.0 (in .cpp file)
    00104
    00106         BufferParameters();
    00107
    00109         //
    00112         BufferParameters(int quadrantSegments);
    00113
    00117         //
    00121         BufferParameters(int quadrantSegments, EndCapStyle endCapStyle);
    00122
    00126         //
    00132         BufferParameters(int quadrantSegments, EndCapStyle endCapStyle,
    00133                          JoinStyle joinStyle, double mitreLimit);
    00134
    00136         //
    00139         int getQuadrantSegments() const { return quadrantSegments; }
    00140
    00144         //
    00170         void setQuadrantSegments(int quadSegs);
    00171
    00175         //
    00180         static double bufferDistanceError(int quadSegs);
    00181
    00183         //
    00186         EndCapStyle getEndCapStyle() const { return endCapStyle; }
    00187
    00189         //
    00197         void setEndCapStyle(EndCapStyle style)
    00198         {
    00199                 endCapStyle = style;
    00200         }
    00201
    00203         //
    00206         JoinStyle getJoinStyle() const { return joinStyle; }
    00207
    00211         //
    00214         //
    00217         void setJoinStyle(JoinStyle style)
    00218         {
    00219                 joinStyle = style;
    00220         }
    00221
    00223         //
    00226         double getMitreLimit() const { return mitreLimit; }
    00227
    00229         //
    00241         void setMitreLimit(double limit)
    00242         {
    00243                 mitreLimit = limit;
    00244         }
    00245
    00263         void setSingleSided(bool isSingleSided)
    00264         {
    00265           _isSingleSided = isSingleSided;
    00266         }
    00267
    00273         bool isSingleSided() const {
    00274           return _isSingleSided;
    00275         }
    00276
    00277
    00278 private:
    00279
    00281         int quadrantSegments;
    00282
    00284         EndCapStyle endCapStyle;
    00285
    00287         JoinStyle joinStyle;
    00288
    00290         double mitreLimit;
    00291
    00292         bool _isSingleSided;
    00293 };
    00294
    00295 } // namespace geos::operation::buffer
    00296 } // namespace geos::operation
    00297 } // namespace geos
    00298
    00299 #ifdef _MSC_VER
    00300 #pragma warning(pop)
    00301 #endif
    00302
    00303 #endif // ndef GEOS_OP_BUFFER_BUFFERPARAMETERS_H
    00304