You can lock the length of a curve so that it maintains a constant hull length, even when you edit the curve (for example, by moving a CV).

To lock/unlock the length of a curve

1. Select the curve (or CVs).
2. Press and hold down the l (lower case L) key.
3. Modify the curve, and it will maintain a constant hull length.
4. To unlock the length, release the l (lower case L) key.
   Note

   You can also lock/unlock the length of a curve by selecting the curve (or CVs), and selecting Edit Curves > Modify Curves > Lock Length or Edit Curves > Modify Curves > Unlock Length, but be careful you don’t forget to unlock the length. Using the hotkey is better, because you’re not likely to forget to unlock the length.

   Note

   When you first lock the length of a curve, a Lock Length attribute is added to the curveShape node. You can thereafter lock/unlock the length of the curve by turning on/off the Lock Length attribute.