QGIS API Documentation 3.27.0-Master (a46f227e17)
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"
23
24#include "qgis_analysis.h"
25
26
27class QgsVectorLayer;
29class QgsFeature;
32class QgsFeedback;
33
42class 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
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 QString text() const override;
185
186 private:
187 QgsTopologicalMesh::Changes apply( QgsMeshEditor *meshEditor ) override;
188};
189
190#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:68
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.