9
1170 Chapter 9: Surface Modeling
Procedure
To creat e a nor mal proj ected cur v e:
1.
In a NURBS object that contains at least
onesurfaceandonecurvesub-object,turnon
Normal Projected Curve in
the NURBS toolbox
or Normal Proj. on the Create Curves rollout.
2. Click the curve, then click the surface where
you want the normal projected curve to lie.
If the cur ve can be projected onto the surface in
the sur face’s norm al di
rection, the projected
curve is created. The orig inal, parent c urve can
go"offtheedgeofthesurface."Theprojected
cur ve is created only
where the projec tion and
the surface intersect.
Inter face
Normal Projected Curve rollout (creation time)
Trim Controls group
Trim—When on, t rims the surface against the
curve. When off, the surface isn’t trimmed.
If it’s impossible to trim with this curve, the surface
is displayed in the er ror color (orange by default).
Forexample,thecurveisunusablefortrimmingif
it neither crosses the edge of the surface nor forms
aclosedloop.
Flip Trim—When on, trims the surface in the
opposite direction.
U S eed a nd V S eed—Change the UV location of
theseedvalueonthesurface.Ifthereisachoice
of projections, the project ion closest to the seed
point is the one used to create the curve.
Normal Projected Curve rollout (modification
time)
Trim Controls grou p
Tri m—When on, trims the surface against the
curve. When off, the surface isn’t trimmed.
If it’s impossible to trim with this curve, the surface
is displayed in the error color (orange by default).
For example, the curve is unusable for trimming if
it neither crosses the ed ge of the surface nor forms
aclosedloop.
Flip Trim—When on, t rims the surface in the
opposite direction.
U S eed a nd V S eed—Change the UV location of
theseedvalueonthesurface.Ifthereisachoice
of projections, the project ion closest to the seed
point is the one used to create the curve.
Replace Cur ve and R eplace Surface—Let you replace
the parent sub-objects. Click a button, then click
a curve or surface to replace the original parent
object.