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Chapter 3. Character Skeleton Setup > Advanced Animation Controls

Advanced Animation Controls

In this section, you add some more complicated controls to your character rig. This process involves using math functions to create automatic torso motions, setting driven keys to create a rolling foot control, creating an advanced backbone with spline IK and clusters, and creating color indicators that warn when a control has been moved too far. Although these controls require more time to set up, they make it easier and faster for you to animate your character.

Some of the expressions used in this section use expression functions. An expression function is a predefined command that can be used in an expression instead of explicitly writing the complicated math associated with the command. Some common expression functions used in Maya are abs, trunc, cos, rand, and time. You can view a list of functions in the Expression Editor under the Insert Functions menu (see Figure 3.55). To view a complete list with detailed explanations of each function, look in the Expressions section in the online documentation of the Help menu.


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