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 2 (H_MSG_TRUE) if the window is valid. Otherwise an exception handling is raised.

get_line_approx is reentrant and processed without parallelization.

set_line_approx, set_line_style, disp_region

get_region_polygon, set_line_approx, set_line_style, disp_region

Foundation