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Chapter 3. Changes in Animation > Reactor Controller

Reactor Controller

The Reactor controller provides a powerful tool in creating custom, variable relationships between any parameter in max. Unlike using Wire Parameter, which creates constant direct connections between parameter values, the Reactor controller enables the user to set up finite relationships by defining parameter states, in which different parameter states (values) can result in various parameter reactions.

For example, say that you want the height of a jet to affect the needle of an altimeter that had a range of 0 to 10,000 feet. Two reactions could be set up. One reaction with the jet at a height of 0 would result in the needle pointed at 0 feet. The second reaction would be defined with the jet at a height of 10,000 feet and the needle pointed at 10,000 feet. However, if the jet was animated beyond 10,000 feet, the needle would appear to be maxed out and pinned at a reading of 10,000 feet, no matter how much higher the jet went.


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