9

1224 Chapter 9: Surface Modeling
Inter face
While a curve-curve point sub-object is selected,
the Curve-Curve Intersection rollout appears.
TrimFirstCurveandTrimSecondCurvegroups
These two groups let you control how the parent
curvesaretrimmed. Thecontrolsarethesame
in each. "First" and "second" refer to the order in
which you picked the parent curves.
Tri m Curve—When on, the parent curve is trimmed
against the curve-curv e point. When off (the
default), the parent isn’t trimmed.
Flip Trim—When on, trims in the opposite
direction.
Seed 1 and S eed 2—Change the U lo cation of the
seed value on the first and second curves. If there is
a choice of intersections, t he intersection closest to
the seed points is the one used to create the point.
ReplaceFirstCurveandReplaceSecond
Curve—
(Only at modification time.) Let you
replace the parent curves. Click a button, then
click the cur ve to replace the original first or
second curve.
Surface-Cur ve Intersection Point
SelectNURBSobject. >Modifypanel>CreatePoints
rollout > Dependent Points group box > Surf-Curve
button
Select NURBS object. > Modify panel > NURBS toolbox >
Create Sur face-Curve Point button
This command creates a dependen t point at the
intersection of a surface and a curve.
Procedure
To create a dependent surf a ce-cu r ve point:
1.
In a NURBS object that has a curve that passes
through a surface, click to turn on Create
Surface Curve Point in the NURBS toolbox or
Surf-CurveontheCreatePointsrollout.
2. Clickthecurve,thenclickthesurface.
Thepointiscreatedatthenearestintersection
between the curve and the surface that is nearest
the seed point. You can use the surface-curve
parameters to trim the parent curve.