Query of the current approximation error for contour display.
get_line_approx returns a parameter that controls the approximation error for region contour display in the active 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.
Approximation (output_control) |
string -> integer |
current approximation error for contour display. |
get_line_approx returns TRUE, if a window is active. Otherwise an exception is raised.
set_line_approx, set_line_style, disp_region
fetch_polygon, set_line_approx, set_line_style, disp_region