8

Surface Point 1223
U Position—Specifies the point’s location on the
curveorrelativetothecurve.
On Cur v e—When on, the point lies on the curve
at the U Position.
Offset—Moves the point according to a relative
(object space) X,Y,Z location.
This is relative to the U Position.
X Offset, Y Offset, and Z Offset—Specify the object
space location of the offset curve point.
Normal—Moves the point along the direction of
thecurve’snormalattheUPosition.
Distance—Specifies the dis tance along the curve’s
normal.Negativevaluesmovethepointopposite
to the normal.
Tangent—Moves the point along the tangent at the
U Position.
UTangent—Specifie s the distance from the curve
along the tangent.
Offset, normal, and tangent displacement of a curve point
Trimming group box
Controls in this group box let you trim the parent
curve.
Trim Curv e—When on, t rims 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. C lick the button,
then click the new curve on which to base the
curve point.
Surface Point
SelectNURBSobject. >Modifypanel>CreatePoints
rollout>DependentPointsgroupbox>SurfacePoint
button
Select NURBS o bjec t. > Modify panel > N URBS toolbox
> Create Surf Point button
This command creates a dependent point that lies
onasurfaceorrelativetoit.Thisisenabledwitha
NURBSobjectthatcontainsasurface.
Procedure
To create a dependent surf a ce point :
1.
Tur n on Su rf Po int a nd t hen clic k ove r a
NURBS surface to position the point.
2. The surface cross-section and cursor are
highlighted during this operation.