qgsquantizedmeshterraingenerator.h

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/***************************************************************************
  qgsterraingenerator.h
  --------------------------------------
  Date                 : August 2024
  Copyright            : (C) 2024 by David Koňařík
  Email                : dvdkon at konarici dot cz
 ***************************************************************************
 *                                                                         *
 *   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.                                   *
 *                                                                         *
 ***************************************************************************/
 
#pragma once
 
#include "qgs3drendercontext.h"
#include "qgschunknode.h"
#include "qgscoordinatetransform.h"
#include "qgsquantizedmeshdataprovider.h"
#include "qgsrectangle.h"
#include "qgsterraingenerator.h"
#include "qgstiledsceneindex.h"
#include "qgstiledscenelayer.h"
#include "qgstiles.h"
 
#include <QPointer>
 
#define SIP_NO_FILE
 
class QgsTerrainEntity;
 

class _3D_EXPORT QgsQuantizedMeshTerrainGenerator : public QgsTerrainGenerator
{
    Q_OBJECT
  public:
    static QgsTerrainGenerator *create() SIP_FACTORY;
 
    QgsQuantizedMeshTerrainGenerator() { mIsValid = false; }
 
    void setTerrain( QgsTerrainEntity *t ) override;
    QgsTerrainGenerator *clone() const override SIP_FACTORY;
    QgsTerrainGenerator::Type type() const override;
    void setExtent( const QgsRectangle &extent ) override;
    QgsRectangle rootChunkExtent() const override;
    float rootChunkError( const Qgs3DMapSettings &map ) const override;
    void rootChunkHeightRange( float &hMin, float &hMax ) const override;
    float heightAt( double x, double y, const Qgs3DRenderContext &context ) const override;
    QFuture<QgsChunkLoaderResult> loadChunk( QgsChunkNode *node ) override;
    // Root node has zoom=0, x=0, y=0.
    // It corresponds to a fake zoom=-1 tile for QgsTileMatrix
    QgsChunkNode *createRootNode() const override;
    QFuture<QVector<QgsChunkNode *>> createChildren( QgsChunkNode *node ) override;

    bool setLayer( QgsTiledSceneLayer *layer );
    QgsTiledSceneLayer *layer() const;
 
  private:
    QPointer<QgsTiledSceneLayer> mLayer;
    std::optional<QgsQuantizedMeshMetadata> mMetadata;
    QgsCoordinateTransform mTileCrsToMapCrs;
    QgsTiledSceneIndex mIndex;
    QgsRectangle mMapExtent;
    QgsTileXYZ nodeIdToTile( QgsChunkNodeId nodeId ) const;
    static QgsTerrainTileEntity *loadEntityInWorker(
      QgsChunkNode *node, Qgs3DRenderContext renderCtx, QgsTiledSceneIndex index, QgsCoordinateTransform tileCrsToMapCrs, double vertScale, bool shadingEnabled, long long tileId, QgsVector3D chunkOrigin
    );
    Qt3DCore::QEntity *finishEntity( QgsTerrainTileEntity *entity, QgsTerrainGenerator::TerrainTextureResources textureResources, Qt3DCore::QEntity *parent );
};