Closed Spline

General

  • Sketch a closed spline curve by clicking points. When you confirm the point selection as completed, the program also completes the curve between the first and last point you selected.
  • You cannot cut a closed spline curve with Delete Section.
  • Later, you can select the spline curve to display the control points (= grips) of the curve. You can snap to these points and drag them to new locations.

Sketch a closed spline curve

  1. Select the function Sketch | Lines | Closed Spline or
    • select the context-sensitive function Line > Closed Spline
  2. If necessary, select the line properties, under Sketch | Style
  3. Click the curve's control points.
    • Click at least 2 points for the curve.
  4. Stop sketching this closed spline curve
    • Press the V key (V = Confirm) or
    • Press the middle mouse button.
  5. Repeat steps 2 to 4 to continue sketching closed spline curves.
  6. Stop drawing closed spline curves
    • Select another function or
    • Press the middle mouse button or
    • Press the Esc key or
    • Press the V key (V = Confirm).

Example 1

  • 1...5: Spline curve control points are clicked.
  • 6: The curve drawing is confirmed.

Example 2, a closed spline curve with two points

  • You can also draw a closed spline curve with two points, selecting a diagonal, as long as the points are not on the same horizontal or vertical axis.
  • 1...2: The points of the spline diagonal are clicked.
  • 3: The closed spline curve drawing is confirmed.