Get the current approximation error for contour display.

::get_line_approx returns a parameter that controls the approximation error for region contour display in the window. It is used by the procedure ::disp_region. Approximation controls the polygon approximation for contour display ( 0 <=> no approximation). Approximation is only important for displaying the contour of objects, especially if a line style was set with ::set_line_style.

::get_line_approx returns H_MSG_TRUE if the window is valid. Otherwise an exception handling is raised.

::set_line_approx, ::set_line_style, ::disp_region

::get_region_polygon, ::set_line_approx, ::set_line_style, ::disp_region

System