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qgsaspectfilter.h
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1 /***************************************************************************
2  qgsaspectfilter.h - description
3  ---------------------------------
4  begin : August 7th, 2009
5  copyright : (C) 2009 by Marco Hugentobler
6  email : marco dot hugentobler at karto dot baug dot ethz dot ch
7  ***************************************************************************/
8 
9 /***************************************************************************
10  * *
11  * This program is free software; you can redistribute it and/or modify *
12  * it under the terms of the GNU General Public License as published by *
13  * the Free Software Foundation; either version 2 of the License, or *
14  * (at your option) any later version. *
15  * *
16  ***************************************************************************/
17 
18 #ifndef QGSASPECTFILTER_H
19 #define QGSASPECTFILTER_H
20 
21 #include "qgsderivativefilter.h"
22 
24 class ANALYSIS_EXPORT QgsAspectFilter: public QgsDerivativeFilter
25 {
26  public:
27  QgsAspectFilter( const QString& inputFile, const QString& outputFile, const QString& outputFormat );
28  ~QgsAspectFilter();
29 
32  float processNineCellWindow( float* x11, float* x21, float* x31,
33  float* x12, float* x22, float* x32,
34  float* x13, float* x23, float* x33 );
35 
36 };
37 
38 #endif // QGSASPECTFILTER_H
Calculates aspect values in a window of 3x3 cells based on first order derivatives in x- and y- direc...
Adds the ability to calculate derivatives in x- and y-directions.
virtual float processNineCellWindow(float *x11, float *x21, float *x31, float *x12, float *x22, float *x32, float *x13, float *x23, float *x33)=0
Calculates output value from nine input values.