BBTK_INPUT(Viewer2D,Orientation,"Slicing orientation : 0:yz / 1:xz / 2:xy",int,"");
BBTK_INPUT(Viewer2D,In,"Input Image",vtkImageData *,"");
BBTK_INPUT(Viewer2D,Orientation,"Slicing orientation : 0:yz / 1:xz / 2:xy",int,"");
BBTK_INPUT(Viewer2D,In,"Input Image",vtkImageData *,"");