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Part V: Animation and Rendering Basics

Setting parameters
The Parameters button on the Motion panel lets you assign controllers and create and delete keys.
Controllers are custom key-creating algorithms that can be defined through the Parameters rollout, shown in
Figure 21.7. You assign these controllers by selecting the position, rotation, or scaling track and clicking the
Assign Controller button to open a list of applicable controllers that you can select.

Cross-Ref
For more information on controllers, see Chapter 22, “Animating with Constraints and Simple Controllers.” n

FIGURE 21.7
The Parameters section of the Motion panel lets you assign controllers and create keys.

When a keyable object is selected, below the Assign Controller rollout is the PRS Parameters rollout where
you can create and delete Position, Rotation, and Scale keys. You can use this rollout to create Position,
Rotation, and Scale keys whether or not the Auto Key or Set Key buttons are enabled. Additional rollouts
may be available, depending upon the selected controller.
Below the PRS Parameters rollout are two Key Info rollouts: Basic and Advanced. These rollouts include the
same key-specific information that you can access using the right-click pop-up menu found in the Track Bar.
Using trajectories

A trajectory is the actual path that the animation follows. When you click the Trajectories button in the
Motion panel, the animation trajectory is shown as a spline with each key displayed as a node and each
frame shown as a white dot. You can then edit the trajectory and its nodes by clicking the Sub-Object but-
ton at the top of the Motion panel, shown in Figure 21.8. The only subobject available is Keys. With the
Sub-Object button enabled, you can use the transform buttons to move and reposition the trajectory nodes.
You can also add and delete keys with the Add Key and Delete Key buttons.

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