9

Surf ace Offset Curve 1167
U S eed a nd V S eed—
Change the UV location of
theseedvalueonsurface1,thefirstsurfaceyou
clicked. If there is a choice of intersections, the
intersection closest to the seed point is the one
used to create the curve.
Sur f-Surf Intersection Curve rollout
(modification time)
Trim Controls group
Trim 1 an d Trim 2—When on, trim a surface against
the intersection curve. When off, the sur face isn’t
tr immed. Trim 1 trims the first p a rent surface
you clicked, and Trim 2 trims the second parent
surface.
If the intersec tion curve does not pass completely
across a surface, t rimming is impossible, and the
affected surface is displayed in the error color
(orange by default).
Flip Trim 1 a nd Flip Trim 2—When on, trim the
associated surface in the opposite direction.
U S eed a nd V S eed—Change the UV location of
theseedvalueonsurface1,thefirstsurfaceyou
clicked. If there is a choice of intersections, the
intersection closest to the seed point is the one
used to create the curve.
Replace First Surface and Replace Second
Surf ace—
Let you replace the parent surfaces. Click
a button, then click the surface to replace the
original first or second sur face.
Surface Offset Curve
Select N U RBS object. > Modify panel > Create Curves
rollout>DependentCurvesgroupbox>SurfOffset
button
Select NURBS object. > Modify panel > NURBS toolbox >
Create Surface Offset Curve button
Thiscommandcreatesacurvethatisoffsetfrom
acurvethatliesonasurface.Inotherwords,the
parentcurvemusthaveoneofthefollowingtypes:
surface-surface intersection, U iso, V iso, normal
projected, vector projected, CV curve on surface,
or point curve on surface. The offset is normal to
thesurface.Thatis,thenewcurveiseitherabove
or below the surface by the offset amount.
Creating surface offset curves
Procedure
To crea te a s urf ace of fset cur ve:
1.
In a NURBS object that contains at least
oneNURBSsurfacewithacurveonit,turn
on Create Surface Offset Curve in the NU RBS