8

1154 Chapter 9: Sur face Modeling
Create an independent point curve sub-object
(page 1–1157)
.
Create a dependent fit curve (as with the
Curve Fit (page 1–1158) button).
Create a dependent transform curve (page
1–1159)
.
Create a dependent blend curve (page
1–1159)
.
Create a dependent offset cu rve (page
1–1161)
.
Create a dependent mirror curve (page
1–1161)
.
Create a dependent chamfer curve (page
1–1163)
.
Create a dependent fillet curve (page 1–1165) .
Create a dependent surface-surface
intersection curve (page 1–1167)
.
Create a dependent Uisocurve(page
1–1170)
.
Create a dependent Visocurve(page
1–1170)
.
Create a dependent normal projected curve
(page 1–1171)
.
Create a dependent vector projected curve
(page 1–1172)
.
Create a dependent CV curve on surface
(page 1–1174)
.
Create a dep endent point curve on surface
(page 1–1176)
.
Create a dependent surfaceoffsetcurve(page
1–1169)
.
Create a dependent surfaceedgecurve(page
1–1178)
.
CV Cu rv e Su b -O bject
Select NURBS object. > Modify panel > C reate Curve s
rollout > CV Curve button
Select NURBS o bjec t. > Modify panel > N URBS toolbox
>CreateCVCurvebutton
CVcurvesub-objectsaresimilartoobject-level
CV curves (p age 1–1112) .Themaindifference
is that you can’t give CV curves a renderable
thickness at the sub-object level.
Drawing T hree-Dimensional Curves
When you create a CV cur ve, you can dr aw it in
threedimensions.Therearetwowaystodothis:
• Draw In All Viewports: This toggle lets you use
any viewport to draw the curve, enabling you
to draw three dimensionally.
• Using CTRL to drag CVs: While you draw a
cur ve, you can use the CTRL key to drag a CV
off of the construction plane.
With the C TRL key method, further mouse
move ment lift s the latest point off the construction
plane. There are two ways to use CTRL:
• Click-drag.IfyouholddownCTRLandalso
hold down the mouse button, you can drag to
change the height of the CV. The CV’s location
is set when you release t he mouse button.
This method is probably more intuitive.