9

Path Constraint 399
4.
Open the Assign Controller rollou t and select
the Position controller.
5. Click the Assign Controller button.
6. Choose Path Constr aint from the Assign
Position Controller dialog.
7. On the Motion panel, click Parameters.
8. In the Path Parameters rollout, click Add Path.
9. In the viewport, select the Circle.
To edit weight values:
1.
Open the Create > Shapes panel and create a
Line that is about 120 units long.
Tip: Use the diameter of the Circle to gauge the
length of the Line.
2. Select the Sphere.
3. OntheMotionpanel,openthePathParameters
rollout.
4. Click the Add Path button and select the line.
The Sphere is now affected equally by both
paths since the path weighting defaults to 50
5. Adjust the Wei ght spinner or enter a numerical
valuefortheweightvalue.
To animate weight values:
1.
Select the Sphere.
2. OntheMotionpanel,openthePathParameters
rollout.
3. Turn on the Auto Key button.
4. Select the Line01 from the Path list.
5. Place the time slider at fr ame 50 and change the
Weight of L i n e01 t o 75.
6. Move the time slider at frame 100 and change
the Weight of Line01 to 10.
7. Select the Circle01 path and change its
Weighting to 25.
8. Turn off Auto Key and play the animation.
To cor rect path constrained object f lipping:
When an object is assigned a path constraint and
the follow box is turned on, the object will rotate
as it moves along the path. Sometimes the object
is subject to unwanted flipping.
1. Select the object that is flipping.
2. On the Animation menu choose Constraints
> Orientation constraint, then constrain the
object to another object’s orientation.
3. Use the control object to adjust the flipping.
Animate the orientation of the control object,
while watching the flipped object at the
problematic frames.