qgsterraingenerator.h

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/***************************************************************************
  qgsterraingenerator.h
  --------------------------------------
  Date                 : July 2017
  Copyright            : (C) 2017 by Martin Dobias
  Email                : wonder 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 QGSTERRAINGENERATOR_H
#define QGSTERRAINGENERATOR_H

#include "qgis_3d.h"

#include "qgstilingscheme.h"
#include "qgschunkloader_p.h"

class QgsAABB;
class Qgs3DMapSettings;
class QgsRectangle;
class QgsTerrainEntity;

class QDomElement;
class QDomDocument;
class QgsProject;


class _3D_EXPORT QgsTerrainGenerator : public QgsChunkLoaderFactory
{
  public:

    enum Type
    {
      Flat,           
      Dem,            
      Online,         
    };

    void setTerrain( QgsTerrainEntity *t ) { mTerrain = t; }

    virtual QgsTerrainGenerator *clone() const = 0 SIP_FACTORY;

    virtual Type type() const = 0;

    virtual QgsRectangle extent() const = 0;

    virtual QgsAABB rootChunkBbox( const Qgs3DMapSettings &map ) const;

    virtual float rootChunkError( const Qgs3DMapSettings &map ) const;

    virtual void rootChunkHeightRange( float &hMin, float &hMax ) const;

    virtual float heightAt( double x, double y, const Qgs3DMapSettings &map ) const;

    virtual void writeXml( QDomElement &elem ) const = 0;

    virtual void readXml( const QDomElement &elem ) = 0;

    virtual void resolveReferences( const QgsProject &project ) { Q_UNUSED( project ) }

    static QString typeToString( Type type );

    const QgsTilingScheme &tilingScheme() const { return mTerrainTilingScheme; }

    QgsCoordinateReferenceSystem crs() const { return mTerrainTilingScheme.crs(); }

  protected:
    QgsTilingScheme mTerrainTilingScheme;   
    QgsTerrainEntity *mTerrain = nullptr;
};


#endif // QGSTERRAINGENERATOR_H