qgspointcloudlayerchunkloader_p.h

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/***************************************************************************
  qgspointcloudlayerchunkloader_p.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 QGSPOINTCLOUDLAYERCHUNKLOADER_P_H
#define QGSPOINTCLOUDLAYERCHUNKLOADER_P_H

 
//
//  W A R N I N G
//  -------------
//
// This file is not part of the QGIS API.  It exists purely as an
// implementation detail.  This header file may change from version to
// version without notice, or even be removed.
//
 
#include <memory>
 
#include "qgschunkedentity.h"
#include "qgschunkloader.h"
#include "qgspointcloud3dsymbol.h"
#include "qgspointcloud3dsymbol_p.h"
#include "qgspointcloudindex.h"
#include "qgspointcloudlayer3drenderer.h"
 
#include <QFutureWatcher>
#include <QVector3D>
#include <Qt3DCore/QBuffer>
#include <Qt3DCore/QGeometry>
 
#define SIP_NO_FILE

class QgsPointCloudLayerChunkLoaderFactory : public QgsChunkLoaderFactory
{
    Q_OBJECT
 
  public:
    QgsPointCloudLayerChunkLoaderFactory(
      const Qgs3DRenderContext &context, const QgsCoordinateTransform &coordinateTransform, QgsPointCloudIndex pc, QgsPointCloud3DSymbol *symbol, double zValueScale, double zValueOffset, int pointBudget
    );

    QgsChunkLoader *createChunkLoader( QgsChunkNode *node ) const override;
    QgsChunkNode *createRootNode() const override;
    QVector<QgsChunkNode *> createChildren( QgsChunkNode *node ) const override;
    int primitivesCount( QgsChunkNode *node ) const override;
 
    bool canCreateChildren( QgsChunkNode *node ) override;
    void prepareChildren( QgsChunkNode *node ) override;

    void fetchHierarchyForNode( const QgsPointCloudNodeId &nodeId, QgsChunkNode *origNode );
 
    Qgs3DRenderContext mRenderContext;
    QgsCoordinateTransform mCoordinateTransform;
    QgsPointCloudIndex mPointCloudIndex;
    std::unique_ptr<QgsPointCloud3DSymbol> mSymbol;
    double mZValueScale = 1.0;
    double mZValueOffset = 0;
    int mPointBudget = 1000000;
    bool mTriangulate = false;
    QgsRectangle mExtent; 
    QSet<QgsPointCloudNodeId> mPendingHierarchyFetches;
    QSet<QgsPointCloudNodeId> mFutureHierarchyFetches;
};
 

class QgsPointCloudLayerChunkLoader : public QgsChunkLoader
{
    Q_OBJECT
 
  public:
    QgsPointCloudLayerChunkLoader(
      const QgsPointCloudLayerChunkLoaderFactory *factory, QgsChunkNode *node, std::unique_ptr<QgsPointCloud3DSymbol> symbol, const QgsCoordinateTransform &coordinateTransform, double zValueScale, double zValueOffset
    );
    ~QgsPointCloudLayerChunkLoader() override;
 
    void start() override;
    void cancel() override;
    Qt3DCore::QEntity *createEntity( Qt3DCore::QEntity *parent ) override;
 
  private:
    const QgsPointCloudLayerChunkLoaderFactory *mFactory;
    std::unique_ptr<QgsPointCloud3DSymbolHandler> mHandler;
    QgsPointCloud3DRenderContext mContext;
    QFutureWatcher<void> *mFutureWatcher = nullptr;
};
 

class QgsPointCloudLayerChunkedEntity : public QgsChunkedEntity
{
    Q_OBJECT
  public:
    explicit QgsPointCloudLayerChunkedEntity(
      Qgs3DMapSettings *map,
      QgsPointCloudLayer *pcl,
      const int indexPosition,
      const QgsCoordinateTransform &coordinateTransform,
      QgsPointCloud3DSymbol *symbol,
      float maxScreenError,
      bool showBoundingBoxes,
      double zValueScale,
      double zValueOffset,
      int pointBudget
    );
 
    QList<QgsRayCastHit> rayIntersection( const QgsRay3D &ray, const QgsRayCastContext &context ) const override;
 
    ~QgsPointCloudLayerChunkedEntity() override;
 
  private slots:
    void updateIndex();
 
  private:
    static QgsPointCloudIndex resolveIndex( const QgsPointCloudLayer *pcl, int indexPosition );
 
    QgsPointCloudLayer *mLayer = nullptr;
    std::unique_ptr<QgsChunkUpdaterFactory> mChunkUpdaterFactory;
    int mIndexPosition;
};

 
#endif // QGSPOINTCLOUDLAYERCHUNKLOADER_P_H