8

1178 Chapter 9: Sur face Modeling
Flip Trim—
When on, trims the surface in the
opposite direction.
2D V iew—When on, displays the Edit Cur ve on
Surface dialog (page 1–1230)
,whichletsyou
create the curve in a two-dimensional (UV)
representation of the surface.
Point Curve on Surface rollout (mo d ificatio n
time)
Trim Controls group
Trim—When on, trims the surface against the
curve. When off, the surface isn’t t rimmed.
If it’s impossible to trim w ith this curve, the surface
is displayed in the error color (orange by default).
Forexample,thecurveisunusablefortrimmingif
it doesn’t form a closed loop.
Flip Trim—When on, trims the surface in the
opposite direction.
Replace Surface—Lets you replace the parent
surface. Click a button, then click a surface to
replace the original parent surface.
Edit—Click to display the Edit Curve on Surface
dialog (page 1–1230)
, which lets you edit the curve
in a two-dimensional (UV) representation of the
surface.
To edit multiple curves on a surface, select more
thanonepointcurvesub-objectonthesame
surface, then click Edit.
SurfaceEdgeCurve
Select NURBS object. > Modify panel > C reate Curve s
rollout>DependentCurvesgroupbox>SurfEdge
button
Select N URBS obj ect. > Modify pane l > NURBS toolbox >
Create Surface Edge Curve button
A surface edge curve is a dependent curve ty pe that
lies on the boundary of the surface. I t can be the
original boundary of the surface, or a trim edge.
Procedure
To create a surface edge curve :
1.
Turn on Surf Edge.
2. Asyoumovethemouseinthescene,NURBS
surfaceedgesarehighlightedinblue.Clickthe
edge w here you want to create the curve.
Interf ace
Sur f ace Edge Curve rollout (creation time)
Seed 1 and S eed 2 —The curve resides on the edge
closesttothetwose
ed values. Adjust the seed
valuestochangetheedgeonwhichthecurve
resides.
Sur face Edge Curve rollo ut (modification time)