QGIS API Documentation  3.23.0-Master (b5237dafc3)
NormVecDecorator.h
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1 /***************************************************************************
2  NormVecDecorator.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 NORMVECDECORATOR_H
18 #define NORMVECDECORATOR_H
19 
20 #include "TriDecorator.h"
21 #include "qgis_sip.h"
22 #include "TriangleInterpolator.h"
23 #include "MathUtils.h"
24 #include "qgslogger.h"
25 #include "qgis_analysis.h"
26 
27 #define SIP_NO_FILE
28 
29 class QgsFeedback;
30 
36 class ANALYSIS_EXPORT NormVecDecorator: public TriDecorator
37 {
38  public:
40  enum PointState {Normal, BreakLine, EndPoint};
44  ~NormVecDecorator() override;
45  int addPoint( const QgsPoint &p ) override;
47  bool calcNormal( double x, double y, QgsPoint &result SIP_OUT ) override;
49  bool calcNormalForPoint( double x, double y, int pointIndex, Vector3D *result SIP_OUT );
50  bool calcPoint( double x, double y, QgsPoint &result SIP_OUT ) override;
52  void eliminateHorizontalTriangles() override;
54  bool estimateFirstDerivative( int pointno );
56  bool estimateFirstDerivatives( QgsFeedback *feedback = nullptr );
58  Vector3D *getNormal( int n ) const;
60  bool getTriangle( double x, double y, QgsPoint &p1 SIP_OUT, Vector3D *v1 SIP_OUT, QgsPoint &p2 SIP_OUT, Vector3D *v2 SIP_OUT, QgsPoint &p3 SIP_OUT, Vector3D *v3 SIP_OUT ) SIP_PYNAME( getTriangleVertices );
62  bool getTriangle( double x, double y, QgsPoint &p1 SIP_OUT, int &ptn1 SIP_OUT, Vector3D *v1 SIP_OUT, PointState *state1 SIP_OUT, QgsPoint &p2 SIP_OUT, int &ptn2 SIP_OUT, Vector3D *v2 SIP_OUT, PointState *state2 SIP_OUT, QgsPoint &p3 SIP_OUT, int &ptn3 SIP_OUT, Vector3D *v3 SIP_OUT, PointState *state3 SIP_OUT );
64  PointState getState( int pointno ) const;
66  void setTriangleInterpolator( TriangleInterpolator *inter ) override;
68  bool swapEdge( double x, double y ) override;
69 
70  bool saveTriangulation( QgsFeatureSink *sink, QgsFeedback *feedback = nullptr ) const override;
71 
72  QgsMesh triangulationToMesh( QgsFeedback *feedback = nullptr ) const override;
73 
74  protected:
77  static const unsigned int DEFAULT_STORAGE_FOR_NORMALS = 100000;
79  TriangleInterpolator *mInterpolator = nullptr;
81  QVector<Vector3D *> *mNormVec;
83  QVector<PointState> *mPointState;
85  void setState( int pointno, PointState s );
86 
87  private:
88  NormVecDecorator( const NormVecDecorator & ) = delete;
89  NormVecDecorator &operator=( const NormVecDecorator & ) = delete;
90 };
91 
92 #ifndef SIP_RUN
93 
95  : mNormVec( new QVector<Vector3D*>( DEFAULT_STORAGE_FOR_NORMALS ) )
96  , mPointState( new QVector<PointState>( DEFAULT_STORAGE_FOR_NORMALS ) )
97 {
98  alreadyestimated = false;
99 }
100 
102  : TriDecorator( tin )
103  , mNormVec( new QVector<Vector3D*>( DEFAULT_STORAGE_FOR_NORMALS ) )
104  , mPointState( new QVector<PointState>( DEFAULT_STORAGE_FOR_NORMALS ) )
105 {
106  alreadyestimated = false;
107 }
108 
110 {
111  mInterpolator = inter;
112 }
113 
114 inline Vector3D *NormVecDecorator::getNormal( int n ) const
115 {
116  if ( mNormVec )
117  {
118  return mNormVec->at( n );
119  }
120  else
121  {
122  QgsDebugMsg( QStringLiteral( "warning, null pointer" ) );
123  return nullptr;
124  }
125 }
126 
127 #endif
128 
129 #endif
Decorator class which adds the functionality of estimating normals at the data points.
void setTriangleInterpolator(TriangleInterpolator *inter) override
Sets an interpolator.
QVector< PointState > * mPointState
Vector who stores, it a point is not on a breakline, if it is a normal point of the breakline or if i...
bool alreadyestimated
Is true, if the normals already have been estimated.
Vector3D * getNormal(int n) const
Returns a pointer to the normal vector for the point with the number n.
TriangleInterpolator * mInterpolator
Association with an interpolator object.
QVector< Vector3D * > * mNormVec
Vector that stores the normals for the points. If 'estimateFirstDerivatives()' was called and there i...
PointState
Enumeration for the state of a point. Normal means, that the point is not on a BreakLine,...
An interface for objects which accept features via addFeature(s) methods.
Base class for feedback objects to be used for cancellation of something running in a worker thread.
Definition: qgsfeedback.h:45
Point geometry type, with support for z-dimension and m-values.
Definition: qgspoint.h:49
Interface for Triangulation classes.
virtual QgsMesh triangulationToMesh(QgsFeedback *feedback=nullptr) const =0
Returns a QgsMesh corresponding to the triangulation.
virtual bool saveTriangulation(QgsFeatureSink *sink, QgsFeedback *feedback=nullptr) const =0
Saves the triangulation features to a feature sink.
Decorator class for Triangulations (s.
Definition: TriDecorator.h:32
bool swapEdge(double x, double y) override
Reads the content of a taff-file.
void setTriangleInterpolator(TriangleInterpolator *interpolator) override
Sets an interpolator object.
void eliminateHorizontalTriangles() override
Eliminates the horizontal triangles by swapping.
int addPoint(const QgsPoint &p) override
Adds a point to the triangulation.
bool calcPoint(double x, double y, QgsPoint &result) override
Calculates x-, y and z-value of the point on the surface and assigns it to 'result'.
bool calcNormal(double x, double y, QgsPoint &result) override
Calculates the normal at a point on the surface and assigns it to 'result'.
This is an interface for interpolator classes for triangulations.
Class Vector3D represents a 3D-Vector, capable to store x-,y- and z-coordinates in double values.
Definition: Vector3D.h:36
#define SIP_PYNAME(name)
Definition: qgis_sip.h:81
#define SIP_OUT
Definition: qgis_sip.h:58
#define QgsDebugMsg(str)
Definition: qgslogger.h:38
Mesh - vertices, edges and faces.