Fix some transforms missing transform context

Author: nyalldawson

src/3d/qgs3dmapsettings.cpp

@@ -226,6 +226,16 @@ void Qgs3DMapSettings::setCrs( const QgsCoordinateReferenceSystem &crs )
   mCrs = crs;
 }
 
+QgsCoordinateTransformContext Qgs3DMapSettings::transformContext() const
+{
+  return mTransformContext;
+}
+
+void Qgs3DMapSettings::setTransformContext( const QgsCoordinateTransformContext &context )
+{
+  mTransformContext = context;
+}
+
 void Qgs3DMapSettings::setBackgroundColor( const QColor &color )
 {
   if ( color == mBackgroundColor )

src/3d/qgs3dmapsettings.h

@@ -88,6 +88,24 @@ class _3D_EXPORT Qgs3DMapSettings : public QObject
     //! Returns coordinate reference system used in the 3D scene
     QgsCoordinateReferenceSystem crs() const { return mCrs; }
 
+    /**
+     * Returns the coordinate transform context, which stores various
+     * information regarding which datum transforms should be used when transforming points
+     * from a source to destination coordinate reference system.
+     *
+     * \see setTransformContext()
+     */
+    QgsCoordinateTransformContext transformContext() const;
+
+    /**
+     * Sets the coordinate transform \a context, which stores various
+     * information regarding which datum transforms should be used when transforming points
+     * from a source to destination coordinate reference system.
+     *
+     * \see transformContext()
+     */
+    void setTransformContext( const QgsCoordinateTransformContext &context );
+
     //! Sets background color of the 3D map view
     void setBackgroundColor( const QColor &color );
     //! Returns background color of the 3D map view
@@ -239,6 +257,8 @@ class _3D_EXPORT Qgs3DMapSettings : public QObject
     bool mSkyboxEnabled = false;  //!< Whether to render skybox
     QString mSkyboxFileBase; //!< Base part of the files with skybox textures
     QString mSkyboxFileExtension; //!< Extension part of the files with skybox textures
+    //! Coordinate transform context
+    QgsCoordinateTransformContext mTransformContext;
 };
 
 

src/3d/terrain/qgsterrainentity_p.cpp

@@ -68,7 +68,7 @@ QgsTerrainEntity::QgsTerrainEntity( int maxLevel, const Qgs3DMapSettings &map, Q
 
   connectToLayersRepaintRequest();
 
-  mTerrainToMapTransform = new QgsCoordinateTransform( map.terrainGenerator()->crs(), map.crs() );
+  mTerrainToMapTransform = new QgsCoordinateTransform( map.terrainGenerator()->crs(), map.crs(), map.transformContext() );
 
   mTextureGenerator = new QgsTerrainTextureGenerator( map );
 

src/3d/terrain/qgsterraingenerator.cpp

@@ -22,7 +22,7 @@
 QgsAABB QgsTerrainGenerator::rootChunkBbox( const Qgs3DMapSettings &map ) const
 {
   QgsRectangle te = extent();
-  QgsCoordinateTransform terrainToMapTransform( crs(), map.crs() );
+  QgsCoordinateTransform terrainToMapTransform( crs(), map.crs(), map.transformContext() );
   te = terrainToMapTransform.transformBoundingBox( te );
 
   float hMin, hMax;
@@ -34,7 +34,7 @@ QgsAABB QgsTerrainGenerator::rootChunkBbox( const Qgs3DMapSettings &map ) const
 float QgsTerrainGenerator::rootChunkError( const Qgs3DMapSettings &map ) const
 {
   QgsRectangle te = extent();
-  QgsCoordinateTransform terrainToMapTransform( crs(), map.crs() );
+  QgsCoordinateTransform terrainToMapTransform( crs(), map.crs(), map.transformContext() );
   te = terrainToMapTransform.transformBoundingBox( te );
 
   // use texel size as the error

src/app/layout/qgslayoutmapwidget.cpp

@@ -305,7 +305,7 @@ void QgsLayoutMapWidget::mapCrsChanged( const QgsCoordinateReferenceSystem &crs
   QgsRectangle newExtent;
   try
   {
-    QgsCoordinateTransform xForm( oldCrs, crs.isValid() ? crs : QgsProject::instance()->crs() );
+    QgsCoordinateTransform xForm( oldCrs, crs.isValid() ? crs : QgsProject::instance()->crs(), QgsProject::instance() );
     QgsRectangle prevExtent = mMapItem->extent();
     newExtent = xForm.transformBoundingBox( prevExtent );
     updateExtent = true;
@@ -526,7 +526,7 @@ void QgsLayoutMapWidget::mSetToMapCanvasExtentButton_clicked()
     try
     {
       QgsCoordinateTransform xForm( QgisApp::instance()->mapCanvas()->mapSettings().destinationCrs(),
-                                    mMapItem->crs() );
+                                    mMapItem->crs(), QgsProject::instance() );
       newExtent = xForm.transformBoundingBox( newExtent );
     }
     catch ( QgsCsException & )
@@ -559,7 +559,7 @@ void QgsLayoutMapWidget::mViewExtentInCanvasButton_clicked()
       try
       {
         QgsCoordinateTransform xForm( mMapItem->crs(),
-                                      QgisApp::instance()->mapCanvas()->mapSettings().destinationCrs() );
+                                      QgisApp::instance()->mapCanvas()->mapSettings().destinationCrs(), QgsProject::instance() );
         currentMapExtent = xForm.transformBoundingBox( currentMapExtent );
       }
       catch ( QgsCsException & )

src/app/qgisapp.cpp

@@ -10392,6 +10392,11 @@ void QgisApp::new3DMapCanvas()
     map->setSelectionColor( mMapCanvas->selectionColor() );
     map->setBackgroundColor( mMapCanvas->canvasColor() );
     map->setLayers( mMapCanvas->layers() );
+    map->setTransformContext( QgsProject::instance()->transformContext() );
+    connect( QgsProject::instance(), &QgsProject::transformContextChanged, map, [map]
+    {
+      map->setTransformContext( QgsProject::instance()->transformContext() );
+    } );
 
     QgsFlatTerrainGenerator *flatTerrain = new QgsFlatTerrainGenerator;
     flatTerrain->setCrs( map->crs() );

tests/src/core/testqgscoordinatetransform.cpp

@@ -244,7 +244,7 @@ void TestQgsCoordinateTransform::transformBoundingBox()
   QGSCOMPARENEAR( resultRect.yMaximum(), expectedRect.yMaximum(), 0.001 );
 
   // test transforming a bounding box, resulting in an invalid transform - exception must be thrown
-  tr = QgsCoordinateTransform( QgsCoordinateReferenceSystem( 4326 ), QgsCoordinateReferenceSystem( QStringLiteral( "EPSG:28356" ) ) );
+  tr = QgsCoordinateTransform( QgsCoordinateReferenceSystem( 4326 ), QgsCoordinateReferenceSystem( QStringLiteral( "EPSG:28356" ) ), QgsProject::instance() );
   QgsRectangle rect( -99999999999, 99999999999, -99999999998, 99999999998 );
   bool errorObtained = false;
   try