BackgroundFilteredView.BackgroundFilteredView.ApplyFilter C# (CSharp) Method

		void ApplyFilter ()
		{
			CIVector center = CIVector.Create (Bounds.GetMidX (), Bounds.GetMidY ());
			CIFilter torus = CIFilter.FromName ("CITorusLensDistortion");
			
			var keys = new NSString[] { CIFilter.InputCenterKey,
										CIFilter.InputRadiusKey,
										CIFilter.InputWidthKey,
										CIFilter.InputRefractionKey };
			var values = new NSObject[] { center,
				                          NSNumber.FromFloat (150),
				                          NSNumber.FromFloat (2),
				                          NSNumber.FromFloat (1.7f)};
			
			torus.SetValuesForKeysWithDictionary (NSDictionary.FromObjectsAndKeys (values,keys));	                                                       
			torus.Name = "torus";
			
			controls.BackgroundFilters = new CIFilter[] { torus };								
			AddAnimationToTorusFilter ();
		}