Quantum GIS API Documentation: src/analysis/raster/qgsderivativefilter.h Source File

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00001 /***************************************************************************
00002                           qgsderivativefilter.h  -  description
00003                           ---------------------
00004     begin                : August 7th, 2009
00005     copyright            : (C) 2009 by Marco Hugentobler
00006     email                : marco dot hugentobler at karto dot baug dot ethz dot ch
00007  ***************************************************************************/
00008 
00009 /***************************************************************************
00010  *                                                                         *
00011  *   This program is free software; you can redistribute it and/or modify  *
00012  *   it under the terms of the GNU General Public License as published by  *
00013  *   the Free Software Foundation; either version 2 of the License, or     *
00014  *   (at your option) any later version.                                   *
00015  *                                                                         *
00016  ***************************************************************************/
00017 
00018 #ifndef QGSDERIVATIVEFILTER_H
00019 #define QGSDERIVATIVEFILTER_H
00020 
00021 #include "qgsninecellfilter.h"
00022 
00024 class QgsDerivativeFilter: public QgsNineCellFilter
00025 {
00026   public:
00027     QgsDerivativeFilter( const QString& inputFile, const QString& outputFile, const QString& outputFormat );
00028     virtual ~QgsDerivativeFilter();
00029     //to be implemented by subclasses
00030     virtual float processNineCellWindow( float* x11, float* x21, float* x31, float* x12, float* x22, \
00031                                          float* x32, float* x13, float* x23, float* x33 ) = 0;
00032 
00033   protected:
00035     float calcFirstDerX( float* x11, float* x21, float* x31, float* x12, float* x22, float* x32, float* x13, float* x23, float* x33 );
00037     float calcFirstDerY( float* x11, float* x21, float* x31, float* x12, float* x22, float* x32, float* x13, float* x23, float* x33 );
00038 };
00039 
00040 #endif // QGSDERIVATIVEFILTER_H