QGIS API Documentation  3.26.3-Buenos Aires (65e4edfdad)
CloughTocherInterpolator.h
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1 /***************************************************************************
2  CloughTocherInterpolator.h - description
3  -------------------
4  copyright : (C) 2004 by Marco Hugentobler
5  email : [email protected]
6  ***************************************************************************/
7 
8 /***************************************************************************
9  * *
10  * This program is free software; you can redistribute it and/or modify *
11  * it under the terms of the GNU General Public License as published by *
12  * the Free Software Foundation; either version 2 of the License, or *
13  * (at your option) any later version. *
14  * *
15  ***************************************************************************/
16 
17 #ifndef CLOUGHTOCHERINTERPOLATOR_H
18 #define CLOUGHTOCHERINTERPOLATOR_H
19 
20 #include "TriangleInterpolator.h"
21 #include "qgspoint.h"
22 #include "qgis_analysis.h"
23 
24 class NormVecDecorator;
25 
26 #define SIP_NO_FILE
27 
35 class ANALYSIS_EXPORT CloughTocherInterpolator : public TriangleInterpolator
36 {
37  protected:
39  NormVecDecorator *mTIN = nullptr;
41  double mEdgeTolerance = 0.00001;
43  QgsPoint point1 = QgsPoint( 0, 0, 0 );
45  QgsPoint point2 = QgsPoint( 0, 0, 0 );
47  QgsPoint point3 = QgsPoint( 0, 0, 0 );
49  QgsPoint cp1 = QgsPoint( 0, 0, 0 );
51  QgsPoint cp2 = QgsPoint( 0, 0, 0 );
53  QgsPoint cp3 = QgsPoint( 0, 0, 0 );
55  QgsPoint cp4 = QgsPoint( 0, 0, 0 );
57  QgsPoint cp5 = QgsPoint( 0, 0, 0 );
59  QgsPoint cp6 = QgsPoint( 0, 0, 0 );
61  QgsPoint cp7 = QgsPoint( 0, 0, 0 );
63  QgsPoint cp8 = QgsPoint( 0, 0, 0 );
65  QgsPoint cp9 = QgsPoint( 0, 0, 0 );
67  QgsPoint cp10 = QgsPoint( 0, 0, 0 );
69  QgsPoint cp11 = QgsPoint( 0, 0, 0 );
71  QgsPoint cp12 = QgsPoint( 0, 0, 0 );
73  QgsPoint cp13 = QgsPoint( 0, 0, 0 );
75  QgsPoint cp14 = QgsPoint( 0, 0, 0 );
77  QgsPoint cp15 = QgsPoint( 0, 0, 0 );
79  QgsPoint cp16 = QgsPoint( 0, 0, 0 );
81  double der1X = 0.0;
83  double der1Y = 0.0;
85  double der2X = 0.0;
87  double der2Y = 0.0;
89  double der3X = 0.0;
91  double der3Y = 0.0;
93  QgsPoint lpoint1 = QgsPoint( 0, 0, 0 );
95  QgsPoint lpoint2 = QgsPoint( 0, 0, 0 );
97  QgsPoint lpoint3 = QgsPoint( 0, 0, 0 );
99  void init( double x, double y );
101  double calcBernsteinPoly( int n, int i, int j, int k, double u, double v, double w );
102 
103  public:
105  CloughTocherInterpolator() = default;
106 
108  CloughTocherInterpolator( NormVecDecorator *tin );
109 
111  bool calcNormVec( double x, double y, QgsPoint &result SIP_OUT ) override;
112  bool calcPoint( double x, double y, QgsPoint &result SIP_OUT ) override;
113  virtual void setTriangulation( NormVecDecorator *tin );
114 };
115 
116 #endif
117 
118 
119 
QgsPoint
Point geometry type, with support for z-dimension and m-values.
Definition: qgspoint.h:48
SIP_OUT
#define SIP_OUT
Definition: qgis_sip.h:58
qgspoint.h
CloughTocherInterpolator
This is an implementation of a Clough-Tocher interpolator based on a triangular tessellation.
Definition: CloughTocherInterpolator.h:35
TriangleInterpolator::calcPoint
virtual bool calcPoint(double x, double y, QgsPoint &result)=0
Performs a linear interpolation in a triangle and assigns the x-,y- and z-coordinates to point.
TriangleInterpolator::calcNormVec
virtual bool calcNormVec(double x, double y, QgsPoint &result)=0
Calculates the normal vector and assigns it to vec.
TriangleInterpolator.h
MathUtils::calcBernsteinPoly
double ANALYSIS_EXPORT calcBernsteinPoly(int n, int i, double t)
Calculates the value of a Bernstein polynomial.
Definition: MathUtils.cpp:101
NormVecDecorator
Decorator class which adds the functionality of estimating normals at the data points.
Definition: NormVecDecorator.h:36
TriangleInterpolator
This is an interface for interpolator classes for triangulations.
Definition: TriangleInterpolator.h:34
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