qgsmeshdataprovider.h

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/***************************************************************************
                         qgsmeshdataprovider.h
                         ---------------------
    begin                : April 2018
    copyright            : (C) 2018 by Peter Petrik
    email                : zilolv 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 QGSMESHDATAPROVIDER_H
#define QGSMESHDATAPROVIDER_H
 
#include <QVector>
#include <QString>
#include <QMap>
#include <QPair>
 
#include <limits>
 
#include "qgis_core.h"
#include "qgspoint.h"
#include "qgsdataprovider.h"
#include "qgsprovidermetadata.h"
#include "qgsmeshdataset.h"
#include "qgsmeshdataprovidertemporalcapabilities.h"
 
 
class QgsRectangle;
 
typedef QgsPoint QgsMeshVertex;
 
typedef QVector<int> QgsMeshFace;
 
typedef QPair<int, int> QgsMeshEdge;
 
struct CORE_EXPORT QgsMesh
{
 
  enum ElementType
  {
    Vertex = 1,
    Edge   = 2,
    Face   = 4
  };
 
  bool contains( const ElementType &type ) const;
 
  int vertexCount() const;
  int faceCount() const;
 
  int edgeCount() const;
 
  QgsMeshVertex vertex( int index ) const;
  QgsMeshFace face( int index ) const;
 
  QgsMeshEdge edge( int index ) const;
 
  void clear();
 
  static bool compareFaces( const QgsMeshFace &face1, const QgsMeshFace &face2 );
 
  QVector<QgsMeshVertex> vertices SIP_SKIP;
  QVector<QgsMeshEdge> edges SIP_SKIP;
  QVector<QgsMeshFace> faces SIP_SKIP;
};
 
// we need to declare metatype so QgsMesh can be passed as QVariant for expressions
Q_DECLARE_METATYPE( QgsMesh );
 
 
class CORE_EXPORT QgsMeshDataSourceInterface SIP_ABSTRACT
{
  public:
 
    virtual ~QgsMeshDataSourceInterface() = default;
 
    bool contains( const QgsMesh::ElementType &type ) const;
 
    virtual int vertexCount() const = 0;
 
    virtual int faceCount() const = 0;
 
    virtual int edgeCount() const = 0;
 
    virtual int maximumVerticesCountPerFace() const {return 0;};
 
    virtual void populateMesh( QgsMesh *mesh ) const = 0;
 
    virtual bool saveMeshFrame( const QgsMesh &mesh ) = 0;
};
 
class CORE_EXPORT QgsMeshDatasetSourceInterface SIP_ABSTRACT
{
  public:
    QgsMeshDatasetSourceInterface();
    virtual ~QgsMeshDatasetSourceInterface() = default;
 
    virtual bool addDataset( const QString &uri ) = 0;
 
    virtual QStringList extraDatasets() const = 0;
 
    virtual int datasetGroupCount( ) const = 0;
 
    virtual int datasetCount( int groupIndex ) const = 0;
 
    int datasetCount( QgsMeshDatasetIndex index ) const;
 
    virtual QgsMeshDatasetGroupMetadata datasetGroupMetadata( int groupIndex ) const = 0;
 
    QgsMeshDatasetGroupMetadata datasetGroupMetadata( QgsMeshDatasetIndex index ) const;
 
    virtual QgsMeshDatasetMetadata datasetMetadata( QgsMeshDatasetIndex index ) const = 0;
 
    virtual QgsMeshDatasetValue datasetValue( QgsMeshDatasetIndex index, int valueIndex ) const = 0;
 
    virtual QgsMeshDataBlock datasetValues( QgsMeshDatasetIndex index, int valueIndex, int count ) const = 0;
 
    virtual QgsMesh3DDataBlock dataset3dValues( QgsMeshDatasetIndex index, int faceIndex, int count ) const = 0;
 
    virtual bool isFaceActive( QgsMeshDatasetIndex index, int faceIndex ) const = 0;
 
    virtual QgsMeshDataBlock areFacesActive( QgsMeshDatasetIndex index, int faceIndex, int count ) const = 0;
 
    Q_DECL_DEPRECATED virtual bool persistDatasetGroup( const QString &path,
        const QgsMeshDatasetGroupMetadata &meta,
        const QVector<QgsMeshDataBlock> &datasetValues,
        const QVector<QgsMeshDataBlock> &datasetActive,
        const QVector<double> &times
                                                      ) SIP_DEPRECATED;
 
    virtual bool persistDatasetGroup( const QString &outputFilePath,
                                      const QString &outputDriver,
                                      const QgsMeshDatasetGroupMetadata &meta,
                                      const QVector<QgsMeshDataBlock> &datasetValues,
                                      const QVector<QgsMeshDataBlock> &datasetActive,
                                      const QVector<double> &times
                                    ) = 0;
 
 
    virtual bool persistDatasetGroup( const QString &outputFilePath,
                                      const QString &outputDriver,
                                      QgsMeshDatasetSourceInterface *source,
                                      int datasetGroupIndex
                                    ) = 0;
 
    QgsMeshDatasetIndex datasetIndexAtTime( const QDateTime &referenceTime,
                                            int groupIndex,
                                            qint64 time,
                                            QgsMeshDataProviderTemporalCapabilities::MatchingTemporalDatasetMethod method ) const;
 
    QList<QgsMeshDatasetIndex> datasetIndexInTimeInterval( const QDateTime &referenceTime,
        int groupIndex,
        qint64 time1,
        qint64 time2 ) const;
 
  protected:
    std::unique_ptr<QgsMeshDataProviderTemporalCapabilities> mTemporalCapabilities;
};
 
 
class CORE_EXPORT QgsMeshDataProvider: public QgsDataProvider, public QgsMeshDataSourceInterface, public QgsMeshDatasetSourceInterface
{
    Q_OBJECT
  public:
    QgsMeshDataProvider( const QString &uri,
                         const QgsDataProvider::ProviderOptions &providerOptions,
                         Qgis::DataProviderReadFlags = Qgis::DataProviderReadFlags() );
 
    QgsMeshDataProviderTemporalCapabilities *temporalCapabilities() override;
    const QgsMeshDataProviderTemporalCapabilities *temporalCapabilities() const override SIP_SKIP;
 
    void setTemporalUnit( Qgis::TemporalUnit unit );
 
 
    virtual QgsMeshDriverMetadata driverMetadata()  const;
 
 
    virtual void close() = 0;
 
    virtual bool removeDatasetGroup( int index ) = 0;
 
  signals:
    void datasetGroupsAdded( int count );
 
};
 
#endif // QGSMESHDATAPROVIDER_H