             ob.data.draw_method = @context.render_manager.gl.LINES
             ob.rotation_order = 'Q'
             ob._update_matrices()
+            ob.radius = height * 0.5
         return ob
 
     # @nodoc

                {varname: 'discontinuity', value: @discontinuity}
            ]
        }

        for k,ob of this when ob.type == 'MESH'
            ob.elements = []

        @line = new @context.Mesh
        d = [0,0,0,  0,0,1]
        @line.load_from_lists d, [0,1]

        @wide_line = new @context.Mesh
        d = [
            0,0,0,  0,0,1,
            1,0,0,  1,0,1,
            0,1,0,  0,1,1,
            -1,0,0,  -1,0,1,
            0,-1,0,  0,-1,1,
        ]
        @wide_line.load_from_lists d, [0,1,2,3,4,5,6,7,8,9]

        @cross3d = new @context.Mesh
        d = [-1,0,0,  1,0,0, 0,-1,0,  0,1,0, 0,0,-1,  0,0,1, ]
