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the standard translation, rotation, scale tools. Setting keys at a sub-object level
of the path, such as vertex or segment, animates the path while affecting the
constrained object.
Multiple Targets and Weighting
A constrained object can be influenced by several target objects. When using
multiple targets, each target has a weight value that defines the degree by
which it influences the constrained object, relative to other targets.
Using Weight is meaningful (and available) only with multiple targets. A value
of 0 means the target has no influence. Any value greater than 0 causes the
target to influence the constrained object relative to other targets' Weight
settings. For example, a target with a Weight value of 80 will have twice the
influence of a target with a Weight value of 40.
Procedures
To assign a Path constraint:
1 Create a Sphere with a radius of 10 and a Circle with a radius of 60.
2 With the Sphere selected, choose Animation menu > Constraints > Path
Constraint.
You are now in select target mode.
3 In the viewport, select the Circle shape.
To access the Path constraint’s parameters through the Motion panel:
1 Select the Sphere.
2 Open the Motion panel.
3 In the PRS Parameters rollout, click the Position button.
The Path constraint's settings are located in the Path Parameters rollout.
To assign a Path constraint through the Motion panel:
1 Create a Sphere with a radius of 10 and a Circle with a radius of 60.
2 Select the Sphere.
3 On the Motion panel and click Parameters.
4 Open the Assign Controller rollout and select the Position controller.
3298 | Chapter 15 Animation