BBTK_INPUT(IsoSurfaceExtractor,Opacity,"Opacity",double,"");
BBTK_INPUT(IsoSurfaceExtractor,Colour,"r g b",vectorcolour,"colour");
BBTK_INPUT(IsoSurfaceExtractor,Renderer,"3D scene in which to insert the surface",vtkRenderer*,"");
BBTK_INPUT(IsoSurfaceExtractor,Opacity,"Opacity",double,"");
BBTK_INPUT(IsoSurfaceExtractor,Colour,"r g b",vectorcolour,"colour");
BBTK_INPUT(IsoSurfaceExtractor,Renderer,"3D scene in which to insert the surface",vtkRenderer*,"");