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1191

Normal Projected Curve 1171

Trim Controls group

Trim—When on, trims the surface against the iso

cur ve.

Flip Trim—When on, flips the direction of the trim.

Replace Base Sur face—Lets you replace the parent

surface. Click the button, then click the new

surface on which to base the iso curve.

Nor ma l Pr oj ected Cur v e

Selec t NURBS object. > Modify panel > C reate Curves

rollout > D ependent Curves group box > Normal Proj.

button

Select NU RB S object. > Modify panel > NURBS toolbox >

Create Normal Projected Curve button

A normal projected curve lies on a surface. It is

based on an or i ginal curve, which is projected

onto the surface in the direction of the surface’s

normals.

You can use normal projected curves for

trimming

(page 1–1082)

Trimming a surface with a normal projected curve

If the projection intersects the surface in two or

more locations, the intersection closest to the seed

point is the one that creates the curve.

Procedure

To create a normal project ed cu rve:

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. C lick 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 surface’s normal di

rection, the projected

curve is created. The original, parent curve can

go "off the edge of the surface." The projected

curve is created only

where the projection and

the surface intersect.

Interf ace

Normal Projected Curve rollout (creation tim e )

Trim Controls group

Trim—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 edge of the surface nor forms

aclosedloop.

Flip Trim—When on, tr i ms the surface in the

opposite direction.

U S eed and V S eed—Change the UV location of

theseedvalueonthesurface.Ifthereisachoice