qgsmeshtriangulation.h

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/***************************************************************************
                          qgsmeshtriangulation.h
                          -----------------
    begin                : August 9th, 2020
    copyright            : (C) 2020 by Vincent Cloarec
    email                : vcloarec at gmail dot com
 ***************************************************************************/
 
/***************************************************************************
 *                                                                         *
 *   This program is free software; you can redistribute it and/or modify  *
 *   it under the terms of the GNU General Public License as published by  *
 *   the Free Software Foundation; either version 2 of the License, or     *
 *   (at your option) any later version.                                   *
 *                                                                         *
 ***************************************************************************/
#ifndef QGSMESHTRIANGULATION_H
#define QGSMESHTRIANGULATION_H
 
#include "qgscoordinatereferencesystem.h"
#include "qgsmeshdataprovider.h"
 
#include "qgis_analysis.h"
 
 
class QgsVectorLayer;
class QgsCoordinateTransformContext;
class QgsFeature;
class QgsFeatureIterator;
class QgsTriangulation;
class QgsFeedback;
 
class ANALYSIS_EXPORT QgsMeshTriangulation : public QObject
{
    Q_OBJECT
  public:
 
    QgsMeshTriangulation();
 
    ~QgsMeshTriangulation();
 
    bool addVertices( QgsFeatureIterator &vertexFeatureIterator, int valueAttribute, const QgsCoordinateTransform &transform, QgsFeedback *feedback = nullptr, long featureCount = 1 );
 
    bool addBreakLines( QgsFeatureIterator &lineFeatureIterator, int valueAttribute, const QgsCoordinateTransform &transformContext, QgsFeedback *feedback = nullptr, long featureCount = 1 );
 
    QgsMesh triangulatedMesh( QgsFeedback *feedback = nullptr ) const;
 
    void setCrs( const QgsCoordinateReferenceSystem &crs );
 
  private:
#ifdef SIP_RUN
    QgsMeshTriangulation( const QgsMeshTriangulation &rhs );
#endif
 
    QgsCoordinateReferenceSystem mCrs;
    std::unique_ptr<QgsTriangulation> mTriangulation;
 
    void addVerticesFromFeature( const QgsFeature &feature, int valueAttribute, const QgsCoordinateTransform &transform, QgsFeedback *feedback = nullptr );
    void addBreakLinesFromFeature( const QgsFeature &feature, int valueAttribute, const QgsCoordinateTransform &transform, QgsFeedback *feedback = nullptr );
};
 
#ifndef SIP_RUN
 
class QgsMeshZValueDataset: public QgsMeshDataset
{
  public:
 
    QgsMeshZValueDataset( const QgsMesh &mesh );
 
    QgsMeshDatasetValue datasetValue( int valueIndex ) const override;
    QgsMeshDataBlock datasetValues( bool isScalar, int valueIndex, int count ) const override;
    QgsMeshDataBlock areFacesActive( int faceIndex, int count ) const override;
    bool isActive( int faceIndex ) const override;
    QgsMeshDatasetMetadata metadata() const override;
    int valuesCount() const override;
 
  private:
    QgsMesh mMesh;
    double mZMinimum = std::numeric_limits<double>::max();
    double mZMaximum = -std::numeric_limits<double>::max();
};
 
#endif //SIP_RUN
 
class ANALYSIS_EXPORT QgsMeshZValueDatasetGroup: public QgsMeshDatasetGroup
{
  public:
 
    QgsMeshZValueDatasetGroup( const QString &datasetGroupName, const QgsMesh &mesh );
 
    void initialize() override;
    QgsMeshDatasetMetadata datasetMetadata( int datasetIndex ) const override;
    int datasetCount() const override;
    QgsMeshDataset *dataset( int index ) const override;
    QgsMeshDatasetGroup::Type type() const override {return QgsMeshDatasetGroup::Virtual;}
    QDomElement writeXml( QDomDocument &doc, const QgsReadWriteContext &context ) const override;
 
  private:
#ifdef SIP_RUN
    QgsMeshZValueDatasetGroup( const QgsMeshZValueDatasetGroup &rhs );
#endif
    std::unique_ptr<QgsMeshZValueDataset> mDataset;
};
 
#endif // QGSMESHTRIANGULATION_H