qgspointcloudlayer3drenderer.h

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/***************************************************************************
  qgspointcloudlayer3drenderer.h
  --------------------------------------
  Date                 : October 2020
  Copyright            : (C) 2020 by Peter Petrik
  Email                : zilolv dot sk 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 QGSPOINTCLOUDLAYER3DRENDERER_H
#define QGSPOINTCLOUDLAYER3DRENDERER_H
 
#include "qgis_3d.h"
#include "qgis_sip.h"
#include "qgs3drendererregistry.h"
#include "qgsabstractpointcloud3drenderer.h"
#include "qgsfeedback.h"
#include "qgsmaplayerref.h"
 
#include <QObject>
 
class QgsPointCloudLayer;
#include "qgspointcloud3dsymbol.h"
#include "qgs3drendercontext.h"
#ifndef SIP_RUN

class _3D_NO_EXPORT QgsPointCloud3DRenderContext : public Qgs3DRenderContext
{
  public:

    QgsPointCloud3DRenderContext( const Qgs3DRenderContext &context, const QgsCoordinateTransform &coordinateTransform, std::unique_ptr<QgsPointCloud3DSymbol> symbol, double zValueScale, double zValueFixedOffset );
 
    QgsPointCloud3DRenderContext( const QgsPointCloud3DRenderContext &rh ) = delete;
    QgsPointCloud3DRenderContext &operator=( const QgsPointCloud3DRenderContext & ) = delete;

    QgsPointCloudAttributeCollection attributes() const { return mAttributes; }

    void setAttributes( const QgsPointCloudAttributeCollection &attributes );

    QgsPointCloud3DSymbol *symbol() const { return mSymbol.get(); }

    void setSymbol( QgsPointCloud3DSymbol *symbol );

    void setFilteredOutCategories( const QgsPointCloudCategoryList &categories );

    QSet<int> getFilteredOutValues() const;

    template<typename T>
    void getAttribute( const char *data, std::size_t offset, QgsPointCloudAttribute::DataType type, T &value ) const
    {
      switch ( type )
      {
        case QgsPointCloudAttribute::UChar:
          value = *reinterpret_cast<const unsigned char *>( data + offset );
          return;
        case QgsPointCloudAttribute::Char:
          value = *( data + offset );
          return;
 
        case QgsPointCloudAttribute::Int32:
          value = *reinterpret_cast<const qint32 *>( data + offset );
          return;
        case QgsPointCloudAttribute::UInt32:
          value = *reinterpret_cast<const quint32 *>( data + offset );
          return;
 
        case QgsPointCloudAttribute::Int64:
          value = *reinterpret_cast<const qint64 *>( data + offset );
          return;
        case QgsPointCloudAttribute::UInt64:
          value = *reinterpret_cast<const quint64 *>( data + offset );
          return;
 
        case QgsPointCloudAttribute::Short:
          value = *reinterpret_cast<const short *>( data + offset );
          return;
 
        case QgsPointCloudAttribute::UShort:
          value = *reinterpret_cast<const unsigned short *>( data + offset );
          return;
 
        case QgsPointCloudAttribute::Float:
          value = *reinterpret_cast<const float *>( data + offset );
          return;
 
        case QgsPointCloudAttribute::Double:
          value = *reinterpret_cast<const double *>( data + offset );
          return;
      }
    }

    double zValueScale() const { return mZValueScale; }

    double zValueFixedOffset() const { return mZValueFixedOffset; }

    bool isCanceled() const;

    void cancelRendering() const;

    void setCoordinateTransform( const QgsCoordinateTransform &coordinateTransform );

    QgsCoordinateTransform coordinateTransform() const { return mCoordinateTransform; }

    QgsFeedback *feedback() const { return mFeedback.get(); }

    QgsRectangle layerExtent() const { return mLayerExtent; }
 
  private:
    void updateExtent();
#ifdef SIP_RUN
    QgsPointCloudRenderContext( const QgsPointCloudRenderContext &rh );
#endif
    QgsPointCloudAttributeCollection mAttributes;
    std::unique_ptr<QgsPointCloud3DSymbol> mSymbol;
    QgsPointCloudCategoryList mFilteredOutCategories;
    double mZValueScale = 1.0;
    double mZValueFixedOffset = 0;
    QgsCoordinateTransform mCoordinateTransform;
    std::unique_ptr<QgsFeedback> mFeedback;
    QgsRectangle mLayerExtent;
};
 

class _3D_EXPORT QgsPointCloudLayer3DRendererMetadata : public Qgs3DRendererAbstractMetadata SIP_SKIP
{
  public:
    QgsPointCloudLayer3DRendererMetadata();

    QgsAbstract3DRenderer *createRenderer( QDomElement &elem, const QgsReadWriteContext &context ) override SIP_FACTORY;
};
 
#endif

class _3D_EXPORT QgsPointCloudLayer3DRenderer : public QgsAbstractPointCloud3DRenderer
{
  public:
    explicit QgsPointCloudLayer3DRenderer();

    void setLayer( QgsPointCloudLayer *layer );
    QgsPointCloudLayer *layer() const;
 
    QString type() const override;
    QgsPointCloudLayer3DRenderer *clone() const override SIP_FACTORY;
    Qt3DCore::QEntity *createEntity( Qgs3DMapSettings *map ) const override SIP_SKIP;

    void setSymbol( QgsPointCloud3DSymbol *symbol SIP_TRANSFER );
    const QgsPointCloud3DSymbol *symbol() const { return mSymbol.get(); }
 
    void writeXml( QDomElement &elem, const QgsReadWriteContext &context ) const override;
    void readXml( const QDomElement &elem, const QgsReadWriteContext &context ) override;
    void resolveReferences( const QgsProject &project ) override;

    double maximumScreenError() const;

    void setMaximumScreenError( double error );

    bool showBoundingBoxes() const;

    void setShowBoundingBoxes( bool showBoundingBoxes );

    int pointRenderingBudget() const { return mPointBudget; };

    void setPointRenderingBudget( int budget );
 
    bool convertFrom2DRenderer( QgsPointCloudRenderer *renderer ) override;

    void setZoomOutBehavior( const Qgis::PointCloudZoomOutRenderBehavior behavior ) { mZoomOutBehavior = behavior; }

    Qgis::PointCloudZoomOutRenderBehavior zoomOutBehavior() const { return mZoomOutBehavior; }
 
  private:
    QgsMapLayerRef mLayerRef; 
    std::unique_ptr<QgsPointCloud3DSymbol> mSymbol;
    double mMaximumScreenError = 3.0;
    bool mShowBoundingBoxes = false;
    int mPointBudget = 5000000;
    Qgis::PointCloudZoomOutRenderBehavior mZoomOutBehavior = Qgis::PointCloudZoomOutRenderBehavior::RenderExtents;
 
  private:
#ifdef SIP_RUN
    QgsPointCloudLayer3DRenderer( const QgsPointCloudLayer3DRenderer & );
    QgsPointCloudLayer3DRenderer &operator=( const QgsPointCloudLayer3DRenderer & );
#endif
};
 
 
#endif // QGSPOINTCLOUDLAYER3DRENDERER_H