Extend

Extend a curve and edit the extension.

Extend or Shorten a Curve

Extend or shorten a curve by a user-defined length, to a given point, or to another curve.

  1. On the ribbon, click the Curves tab.
  2. Click the Extend icon.

  3. Extend a curve:
    • Click a curve near the end point. By default, the curve is extended at the end point at a length of 1.0.
    • In the guide bar, select one of the following options:
      • Start: Extend the curve at the start point.
      • End: Extend the curve at the end point.
      • Both: Extend the curve at both the start point and end point.
    Tip: To display information about the extension, click the end point of the extension.
  4. Optional: See Step 2 of Edit an Extension.
  5. Double-right click to exit the tool.

Edit an Extension

Change the location, shape, distance, increment factor, total length, parameter distance, and reference curve.

  1. Double-click the extension to enter edit mode.
  2. Edit the extension.
    To Do this
    Change the location of the extension In the guide bar, select one of the following options:
    • Start: Extend the curve at the start point.
    • End: Extend the curve at the end point.
    • Both: Extend the curve at both the start point and end point.
    Change the shape In the guide bar, select one of the following options:
    • Linear Shape (default): The extension is a segment.
    • Soft Shape: The extension has continuous curvature.
    • Reflective Shape: The extension is the mirror image of the curve.
    • Natural Shape: The original curve is extended.
    • Arc Shape: The extension is shaped like an arc.
    Change the length of the extension
    • Drag the end point of the extension.
    • In the guide bar, select Extension Distance, and then enter a Length.
    • Click the end point. In the microdialog, select Extension Distance, and then enter a Length.
    Change the increment factor The increment factor increases the length by a percentage. For example, if you enter a value of 0.1, the length increases by 10%.
    • In the guide bar, select Increment Factor, and then enter a Parameter.
    • Click the end point. In the microdialog, select Increment Factor, and then enter a Parameter.
    Change the total length of the curve
    • In the guide bar, select Total Length, and then enter a Length.
    • Click the end point. In the microdialog, select Total Length, and then enter a Length.
    Change the parameter distance
    • In the guide bar, select Up to Parameter, and then enter a Parameter distance.
    • Click the end point. In the microdialog, select Up to Parameter, and then enter a Parameter distance.
    Change the reference curve You can extend the curve to another curve.
    • In the guide bar, select Reference curve/surface, and then click a curve.
    • Click the end point. In the microdialog, select Reference curve/surface, and then click a curve.

    This option is indicated by green handles at the end point of the extension.

  3. Right-click and mouse through the check mark to exit, or double-right-click.