9

830 Chapter 8: Modifiers
3.
OntheModifypanel,chooseSpherify
from the Modifier List.
4. Turn the Auto Key button on.
5. Set the Spheri fy Percent to 0.
6. Movethetimeslideraheadtoframe30.
7. SettheSpherifyPercentto100.
8. Turn the Auto Key button off.
9. Dragthetimeslidertoplaytheanimation,or
click Play.
Inter face
Percent—Setsthepercentageofspherical
distortion to apply to an object.
Spline IK Control Modifier
Selec t a spline or NURBS curve > Modify panel > Modifier
List > Spline IK Control
When the Spline IK Control modifier is applied to
a spline, you can selec t and transform its vertices
without having to access the vertex sub-object
level. It can also place helpers at each vertex
location to aid in mo ving vertices.
The Spline IK Control modifier works by placing
knots (control points) at each vertex. The k nots
canthenbeusedtocontrolvertices,whichinturn
reshape the spline.
This modifier also works on NURBS curves,
placing a knot at each control poin t or control
vertex (CV).
Use the Spline IK Control modifier to prepare a
spline or NURBS curve for u se with the Spline IK
Solver.
See also
Spline IK (page 2–473)
Interfa ce
Co ntrol Objects—When helpers are created, knot
numbers and their corresponding names appear
here. Knot #1 is placed at the first vertex (page
3–941) on the spline, and additional knots are
numbered in sequence.
Cr e a te H e l p e rs —Places a helper at each kn ot, and
displays knot numbers and helper names in the
Control O bjects area. Helper display is based on
selections in the Helper Display group. Helpers are
linked upon creation if a linking option is selected
in the Link Types group.
Note: Click Create Helpers only once. Clicking this
option more than once will create extra helpers at
each knot, making it difficult to control the spline.