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;
class QgsFeedback;
 
class QgsAbstract3DEngine;
class QgsAbstract3DSymbol;
class Qgs3DMapScene;
class QgsPointCloudRenderer;
class QgsPointCloudLayer3DRenderer;
 
namespace Qt3DExtras
{
  class QPhongMaterial;
}
 
#include "qgs3dmapsettings.h"
#include "qgs3danimationsettings.h"
#include "qgs3dtypes.h"
#include "qgsaabb.h"
#include "qgsray3d.h"
#include "qgsraycastingutils.h"
 
#include <QSize>
#include <Qt3DRender/QCamera>
#include <Qt3DRender/QCullFace>
 
#include <memory>
 
#define SIP_NO_FILE
 
class Qgs3DRenderContext;
 
class _3D_EXPORT Qgs3DUtils
{
  public:
 
    static QImage captureSceneImage( QgsAbstract3DEngine &engine, Qgs3DMapScene *scene );
 
    static QImage captureSceneDepthBuffer( QgsAbstract3DEngine &engine, Qgs3DMapScene *scene );
 
    static double calculateEntityGpuMemorySize( Qt3DCore::QEntity *entity );
 
    static bool exportAnimation( const Qgs3DAnimationSettings &animationSettings,
                                 Qgs3DMapSettings &mapSettings,
                                 int framesPerSecond,
                                 const QString &outputDirectory,
                                 const QString &fileNameTemplate,
                                 const QSize &outputSize,
                                 QString &error,
                                 QgsFeedback *feedback = nullptr
                               );
 
    static int maxZoomLevel( double tile0width, double tileResolution, double maxError );
 
    static QString altClampingToString( Qgis::AltitudeClamping altClamp );
    static Qgis::AltitudeClamping altClampingFromString( const QString &str );
 
    static QString altBindingToString( Qgis::AltitudeBinding altBind );
    static Qgis::AltitudeBinding altBindingFromString( const QString &str );
 
    static QString cullingModeToString( Qgs3DTypes::CullingMode mode );
    static Qgs3DTypes::CullingMode cullingModeFromString( const QString &str );
 
    static float clampAltitude( const QgsPoint &p, Qgis::AltitudeClamping altClamp, Qgis::AltitudeBinding altBind, float offset, const QgsPoint &centroid, const Qgs3DRenderContext &context );
    static void clampAltitudes( QgsLineString *lineString, Qgis::AltitudeClamping altClamp, Qgis::AltitudeBinding altBind, const QgsPoint &centroid, float offset, const Qgs3DRenderContext &context );
    static bool clampAltitudes( QgsPolygon *polygon, Qgis::AltitudeClamping altClamp, Qgis::AltitudeBinding altBind, float offset, const Qgs3DRenderContext &context );
 
    static QString matrix4x4toString( const QMatrix4x4 &m );
    static QMatrix4x4 stringToMatrix4x4( const QString &str );
 
    static void extractPointPositions( const QgsFeature &f, const Qgs3DRenderContext &context, Qgis::AltitudeClamping altClamp, QVector<QVector3D> &positions );
 
    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 QgsAABB layerToWorldExtent( const QgsRectangle &extent, double zMin, double zMax, const QgsCoordinateReferenceSystem &layerCrs, const QgsVector3D &mapOrigin, const QgsCoordinateReferenceSystem &mapCrs, const QgsCoordinateTransformContext &context );
 
    static QgsRectangle worldToLayerExtent( const QgsAABB &bbox, const QgsCoordinateReferenceSystem &layerCrs, const QgsVector3D &mapOrigin, const QgsCoordinateReferenceSystem &mapCrs, const QgsCoordinateTransformContext &context );
 
    static QgsAABB mapToWorldExtent( const QgsRectangle &extent, double zMin, double zMax, const QgsVector3D &mapOrigin );
 
    static QgsRectangle worldToMapExtent( const QgsAABB &bbox, const QgsVector3D &mapOrigin );
 
    static QgsVector3D transformWorldCoordinates( const QgsVector3D &worldPoint1, const QgsVector3D &origin1, const QgsCoordinateReferenceSystem &crs1, const QgsVector3D &origin2, const QgsCoordinateReferenceSystem &crs2,
        const QgsCoordinateTransformContext &context );
 
    static void estimateVectorLayerZRange( QgsVectorLayer *layer, double &zMin, double &zMax );
 
    static QgsExpressionContext globalProjectLayerExpressionContext( QgsVectorLayer *layer );
 
    static QgsPhongMaterialSettings phongMaterialFromQt3DComponent( Qt3DExtras::QPhongMaterial *material );
 
    static QgsRay3D rayFromScreenPoint( const QPoint &point, const QSize &windowSize, Qt3DRender::QCamera *camera );
 
    static QVector3D screenPointToWorldPos( const QPoint &screenPoint, double depth, const QSize &screenSize, Qt3DRender::QCamera *camera );
 
    static void pitchAndYawFromViewVector( QVector3D vect, double &pitch, double &yaw );
 
    static QVector2D screenToTextureCoordinates( QVector2D screenXY, QSize winSize );
 
    static QVector2D textureToScreenCoordinates( QVector2D textureXY, QSize winSize );
 
    static double decodeDepth( const QRgb &pixel )
    {
      return ( ( qRed( pixel ) / 255.0 + qGreen( pixel ) ) / 255.0 + qBlue( pixel ) ) / 255.0;
    }
 
    static std::unique_ptr< QgsPointCloudLayer3DRenderer > convert2DPointCloudRendererTo3D( QgsPointCloudRenderer *renderer );
 
    static QHash<QgsMapLayer *, QVector<QgsRayCastingUtils::RayHit>> castRay( Qgs3DMapScene *scene, const QgsRay3D &ray, const QgsRayCastingUtils::RayCastContext &context );
 
    static QgsRectangle tryReprojectExtent2D( const QgsRectangle &extent, const QgsCoordinateReferenceSystem &crs1, const QgsCoordinateReferenceSystem &crs2, const QgsCoordinateTransformContext &context );
 
    static float screenSpaceError( float epsilon, float distance, int screenSize, float fov );
 
    static void computeBoundingBoxNearFarPlanes( const QgsAABB &bbox, const QMatrix4x4 &viewMatrix, float &fnear, float &ffar );
 
    static Qt3DRender::QCullFace::CullingMode qt3DcullingMode( Qgs3DTypes::CullingMode mode );
 
    static QByteArray addDefinesToShaderCode( const QByteArray &shaderCode, const QStringList &defines );
 
    static QByteArray removeDefinesFromShaderCode( const QByteArray &shaderCode, const QStringList &defines );
};
 
#endif // QGS3DUTILS_H