QGIS API Documentation 3.27.0-Master (75dc696944)
qgsderivativefilter.h
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1/***************************************************************************
2 qgsderivativefilter.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 QGSDERIVATIVEFILTER_H
19#define QGSDERIVATIVEFILTER_H
20
21#include "qgsninecellfilter.h"
22#include "qgis_analysis.h"
23
30class ANALYSIS_EXPORT QgsDerivativeFilter : public QgsNineCellFilter
31{
32 public:
33 QgsDerivativeFilter( const QString &inputFile, const QString &outputFile, const QString &outputFormat );
34
35 float processNineCellWindow( float *x11, float *x21, float *x31,
36 float *x12, float *x22, float *x32,
37 float *x13, float *x23, float *x33 ) override = 0;
38
39 protected:
41 float calcFirstDerX( float *x11, float *x21, float *x31, float *x12, float *x22, float *x32, float *x13, float *x23, float *x33 ) const;
43 float calcFirstDerY( float *x11, float *x21, float *x31, float *x12, float *x22, float *x32, float *x13, float *x23, float *x33 ) const;
44};
45
46#endif // QGSDERIVATIVEFILTER_H
Adds the ability to calculate derivatives in x- and y-directions.
float processNineCellWindow(float *x11, float *x21, float *x31, float *x12, float *x22, float *x32, float *x13, float *x23, float *x33) override=0
Calculates output value from nine input values.
Base class for raster analysis methods that work with a 3x3 cell filter and calculate the value of ea...