9

1222 Chapter 9: Surface Modeling
Offset, normal, and tangent displacement of a curve point
Trimming group box
Controls in this group box let you trim the parent
cur ve.
Trim Curve—When on, trims the parent curve
against the curve point’s U position. When off (the
default), the parent isn’t trimmed.
Flip Trim—When on, trims in the opposite
direction.
Replace B ase Cur ve—(Only at modification time.)
Lets you replace the parent curve. Click the button,
then click the new curve on which to base the
cur ve point.
Surface Point
Select NURB S object. > Modify panel > Create Points
rollout > Dependent Points group box > S urface Point
button
Select NURBS ob ject. > Modify panel > NURBS toolbox
>CreateSurfPointbutton
This command creates a dependent p oint that lies
on a surface or relative to it. This is enabled with a
NURBSobjectthatcontainsasurface.
Procedure
To crea te a dependent s ur f a ce p oint:
1.
Turn on Surf Point and then click over a
NURBS surface to position the point.
2. The surface cross-section and cursor are
highlighted during this operation.
3. Right-click to end the create operation.
4. At the Point sub-object level, adjust the point’s
position relative to the surface by adjusting the
surface p oint parameters in the Surface Point
rollout.
Interfa ce
Whileasurfacepointsub-objectisselected,the
Surface Point rollout appears. These controls are
similar to the curve point controls.