ElevationMatrix.h

00001 /**********************************************************************
00002  * $Id: ElevationMatrix.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_OVERLAY_ELEVATIONMATRIX_H
00017 #define GEOS_OP_OVERLAY_ELEVATIONMATRIX_H
00018 
00019 #include <vector>
00020 #include <string>
00021 
00022 #include <geos/geom/CoordinateFilter.h> // for inheritance 
00023 #include <geos/geom/Envelope.h> // for composition
00024 #include <geos/operation/overlay/ElevationMatrixCell.h> // for composition
00025 
00026 // Forward declarations
00027 namespace geos {
00028         namespace geom {
00029                 class Coordinate;
00030                 class Geometry;
00031         }
00032         namespace operation {
00033                 namespace overlay {
00034                         class ElevationMatrixFilter;
00035                         class ElevationMatrix;
00036                 }
00037         }
00038 }
00039 
00040 namespace geos {
00041 namespace operation { // geos::operation
00042 namespace overlay { // geos::operation::overlay
00043 
00044 
00045 /*
00046  * This is the CoordinateFilter used by ElevationMatrix.
00047  * filter_ro is used to add Geometry Coordinate's Z
00048  * values to the matrix.
00049  * filter_rw is used to actually elevate Geometries.
00050  */
00051 class ElevationMatrixFilter: public geom::CoordinateFilter
00052 {
00053 public:
00054         ElevationMatrixFilter(ElevationMatrix &em);
00055         ~ElevationMatrixFilter();
00056         void filter_rw(geom::Coordinate *c) const;
00057         void filter_ro(const geom::Coordinate *c);
00058 private:
00059         ElevationMatrix &em;
00060         double avgElevation;
00061 };
00062 
00063 
00064 /*
00065  */
00066 class ElevationMatrix {
00067 friend class ElevationMatrixFilter;
00068 public:
00069         ElevationMatrix(const geom::Envelope &extent, unsigned int rows,
00070                 unsigned int cols);
00071         ~ElevationMatrix();
00072         void add(const geom::Geometry *geom);
00073         void elevate(geom::Geometry *geom) const;
00074         // set Z value for each cell w/out one
00075         double getAvgElevation() const;
00076         ElevationMatrixCell &getCell(const geom::Coordinate &c);
00077         const ElevationMatrixCell &getCell(const geom::Coordinate &c) const;
00078         std::string print() const;
00079 private:
00080         ElevationMatrixFilter filter;
00081         void add(const geom::Coordinate &c);
00082         geom::Envelope env;
00083         unsigned int cols;
00084         unsigned int rows;
00085         double cellwidth;
00086         double cellheight;
00087         mutable bool avgElevationComputed;
00088         mutable double avgElevation;
00089         std::vector<ElevationMatrixCell>cells;
00090 };
00091 
00092 
00093 } // namespace geos::operation::overlay
00094 } // namespace geos::operation
00095 } // namespace geos
00096 
00097 #endif // ndef GEOS_OP_OVERLAY_ELEVATIONMATRIX_H
00098 
00099 /**********************************************************************
00100  * $Log$
00101  * Revision 1.1  2006/03/17 13:24:59  strk
00102  * opOverlay.h header splitted. Reduced header inclusions in operation/overlay implementation files. ElevationMatrixFilter code moved from own file to ElevationMatrix.cpp (ideally a class-private).
00103  *
00104  **********************************************************************/
00105 

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