Define the approximation error for contour display.
set_line_approx defines the approximation error for region contour display in the window. Approximation values greater than zero cause a polygon approximation = smoothing (with a maximum polygon/contour deviation of Approximation pixel). The approximation algorithm is the same as in get_region_polygon. set_line_approx is important for contour output via set_line_style.
|
WindowHandle (input_control) |
window -> integer |
| Window_id. | |
|
Approximation (input_control) |
integer -> integer |
| Maximum deviation from the original contour. | |
| Default value: 0 | |
| Typical range of values: 0 <= Approximation | |
| Restriction: Approximation >= 0 | |
/* Calling */ set_line_approx(WindowHandle,Approximation) set_draw(WindowHandle,'margin') disp_region(Obj,WindowHandle). /* correspond with */ get_region_polygon(Obj,Approximation,Row,Col) disp_polygon(WindowHandle,Row,Col).
set_line_approx returns 2 (H_MSG_TRUE) if the parameter is correct and the window is valid. Otherwise an exception handling is raised.
set_line_approx is reentrant and processed without parallelization.
get_region_polygon, disp_polygon
get_line_approx, set_line_style, set_draw, disp_region
System
