QGIS API Documentation 3.27.0-Master (f261cc1f8b)
NormVecDecorator.h
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1/***************************************************************************
2 NormVecDecorator.h - description
3 -------------------
4 copyright : (C) 2004 by Marco Hugentobler
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"
23#include "MathUtils.h"
24#include "qgslogger.h"
25#include "qgis_analysis.h"
26
27#define SIP_NO_FILE
28
29class QgsFeedback;
30
36class 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
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.