qgs3dutils.h

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/***************************************************************************
  qgs3dutils.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 QGS3DUTILS_H
#define QGS3DUTILS_H

class QgsLineString;
class QgsPolygon;

#include "qgs3dmapsettings.h"
#include "qgsaabb.h"

#include <Qt3DRender/QCullFace>

enum AltitudeClamping
{
  AltClampAbsolute,   
  AltClampRelative,   
  AltClampTerrain,    
};


enum AltitudeBinding
{
  AltBindVertex,      
  AltBindCentroid,    
};


class _3D_EXPORT Qgs3DUtils
{
  public:

    static int maxZoomLevel( double tile0width, double tileResolution, double maxError );

    static QString altClampingToString( AltitudeClamping altClamp );
    static AltitudeClamping altClampingFromString( const QString &str );

    static QString altBindingToString( AltitudeBinding altBind );
    static AltitudeBinding altBindingFromString( const QString &str );

    static QString cullingModeToString( Qt3DRender::QCullFace::CullingMode mode );
    static Qt3DRender::QCullFace::CullingMode cullingModeFromString( const QString &str );

    static void clampAltitudes( QgsLineString *lineString, AltitudeClamping altClamp, AltitudeBinding altBind, const QgsPoint &centroid, float height, const Qgs3DMapSettings &map );
    static bool clampAltitudes( QgsPolygon *polygon, AltitudeClamping altClamp, AltitudeBinding altBind, float height, const Qgs3DMapSettings &map );

    static QString matrix4x4toString( const QMatrix4x4 &m );
    static QMatrix4x4 stringToMatrix4x4( const QString &str );

    static QList<QVector3D> positions( const Qgs3DMapSettings &map, QgsVectorLayer *layer, const QgsFeatureRequest &req, AltitudeClamping altClamp );

    static bool isCullable( const QgsAABB &bbox, const QMatrix4x4 &viewProjectionMatrix );

    static QgsVector3D mapToWorldCoordinates( const QgsVector3D &mapCoords, const QgsVector3D &origin );
    static QgsVector3D worldToMapCoordinates( const QgsVector3D &worldCoords, const QgsVector3D &origin );

    static QgsVector3D transformWorldCoordinates( const QgsVector3D &worldPoint1, const QgsVector3D &origin1, const QgsCoordinateReferenceSystem &crs1, const QgsVector3D &origin2, const QgsCoordinateReferenceSystem &crs2,
        const QgsCoordinateTransformContext &context );
};

#endif // QGS3DUTILS_H