QGIS API Documentation  3.21.0-Master (5b68dc587e)
qgsmeshtriangulation.h
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1 /***************************************************************************
2  qgsmeshtriangulation.h
3  -----------------
4  begin : August 9th, 2020
5  copyright : (C) 2020 by Vincent Cloarec
6  email : vcloarec at gmail dot com
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 #ifndef QGSMESHTRIANGULATION_H
18 #define QGSMESHTRIANGULATION_H
19 
21 #include "qgsmeshdataprovider.h"
22 #include "qgsmeshadvancedediting.h"
23 
24 #include "qgis_analysis.h"
25 
26 
27 class QgsVectorLayer;
29 class QgsFeature;
30 class QgsFeatureIterator;
31 class QgsTriangulation;
32 class QgsFeedback;
33 
42 class ANALYSIS_EXPORT QgsMeshTriangulation : public QObject
43 {
44  Q_OBJECT
45  public:
46 
49 
52 
62  bool addVertices( QgsFeatureIterator &vertexFeatureIterator, int valueAttribute, const QgsCoordinateTransform &transform, QgsFeedback *feedback = nullptr, long featureCount = 1 );
63 
74  bool addBreakLines( QgsFeatureIterator &lineFeatureIterator, int valueAttribute, const QgsCoordinateTransform &transformContext, QgsFeedback *feedback = nullptr, long featureCount = 1 );
75 
81  int addVertex( const QgsPoint &vertex );
82 
84  QgsMesh triangulatedMesh( QgsFeedback *feedback = nullptr ) const;
85 
87  void setCrs( const QgsCoordinateReferenceSystem &crs );
88 
89  private:
90 #ifdef SIP_RUN
92 #endif
93 
95  std::unique_ptr<QgsTriangulation> mTriangulation;
96 
97  void addVerticesFromFeature( const QgsFeature &feature, int valueAttribute, const QgsCoordinateTransform &transform, QgsFeedback *feedback = nullptr );
98  void addBreakLinesFromFeature( const QgsFeature &feature, int valueAttribute, const QgsCoordinateTransform &transform, QgsFeedback *feedback = nullptr );
99 };
100 
101 #ifndef SIP_RUN
102 
112 {
113  public:
114 
116  QgsMeshZValueDataset( const QgsMesh &mesh );
117 
118  QgsMeshDatasetValue datasetValue( int valueIndex ) const override;
119  QgsMeshDataBlock datasetValues( bool isScalar, int valueIndex, int count ) const override;
120  QgsMeshDataBlock areFacesActive( int faceIndex, int count ) const override;
121  bool isActive( int faceIndex ) const override;
122  QgsMeshDatasetMetadata metadata() const override;
123  int valuesCount() const override;
124 
125  private:
126  QgsMesh mMesh;
127  double mZMinimum = std::numeric_limits<double>::max();
128  double mZMaximum = -std::numeric_limits<double>::max();
129 };
130 
131 #endif //SIP_RUN
132 
141 class ANALYSIS_EXPORT QgsMeshZValueDatasetGroup: public QgsMeshDatasetGroup
142 {
143  public:
144 
151  QgsMeshZValueDatasetGroup( const QString &datasetGroupName, const QgsMesh &mesh );
152 
153  void initialize() override;
154  QgsMeshDatasetMetadata datasetMetadata( int datasetIndex ) const override;
155  int datasetCount() const override;
156  QgsMeshDataset *dataset( int index ) const override;
158  QDomElement writeXml( QDomDocument &doc, const QgsReadWriteContext &context ) const override;
159 
160  private:
161 #ifdef SIP_RUN
163 #endif
164  std::unique_ptr<QgsMeshZValueDataset> mDataset;
165 };
166 
167 
178 {
179  public:
180 
183 
184  private:
185  QgsTopologicalMesh::Changes apply( QgsMeshEditor *meshEditor ) override;
186 };
187 
188 #endif // QGSMESHTRIANGULATION_H
This class represents a coordinate reference system (CRS).
Contains information about the context in which a coordinate transform is executed.
Class for doing transforms between two map coordinate systems.
Wrapper for iterator of features from vector data provider or vector layer.
The feature class encapsulates a single feature including its unique ID, geometry and a list of field...
Definition: qgsfeature.h:56
Base class for feedback objects to be used for cancellation of something running in a worker thread.
Definition: qgsfeedback.h:45
Abstract class that can be derived to implement advanced editing on mesh.
QgsMeshDataBlock is a block of integers/doubles that can be used to retrieve: active flags (e....
Abstract class that represents a dataset group.
Type
Type of the dataset group.
@ Virtual
Temporary dataset group in memory.
QgsMeshDatasetMetadata is a collection of mesh dataset metadata such as whether the data is valid or ...
QgsMeshDatasetValue represents single dataset value.
Abstract class that represents a dataset.
Class that can be used with QgsMeshEditor::advancedEdit() to add triangle faces to a mesh created by ...
QgsMeshEditingDelaunayTriangulation()
Constructor.
Class that makes edit operation on a mesh.
Definition: qgsmesheditor.h:65
Class that handles mesh creation with Delaunay constrained triangulation.
~QgsMeshTriangulation()
Destructor.
Convenient class that can be used to obtain a datasetgroup on vertices that represents the Z value of...
QgsMeshDatasetGroup::Type type() const override
Returns the type of dataset group.
Convenient class that can be used to obtain a dataset that represents the Z values of mesh vertices.
QgsMeshDataBlock areFacesActive(int faceIndex, int count) const override
Returns whether faces are active.
QgsMeshDatasetMetadata metadata() const override
Returns the metadata of the dataset.
QgsMeshZValueDataset(const QgsMesh &mesh)
Constructor with the mesh.
bool isActive(int faceIndex) const override
Returns whether the face is active.
int valuesCount() const override
Returns the values count.
QgsMeshDatasetValue datasetValue(int valueIndex) const override
Returns the value with index valueIndex.
QgsMeshDataBlock datasetValues(bool isScalar, int valueIndex, int count) const override
Returns count values from valueIndex.
Point geometry type, with support for z-dimension and m-values.
Definition: qgspoint.h:49
The class is used as a container of context for various read/write operations on other objects.
Class that contains topological differences between two states of a topological mesh,...
Interface for Triangulation classes.
Represents a vector layer which manages a vector based data sets.
const QgsCoordinateReferenceSystem & crs
Mesh - vertices, edges and faces.