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In This Chapter

There are many times when keyframing your animations is just not practical, because you would have to assign a key for almost every frame to get convincing motion. For example, if you want to create an animation that includes tumbling objects or a flag waving in the wind, it would require many attempts to keyframe the necessary randomness of the motion.

However, 3ds max 7 includes a component called Reactor, which calculates collisions between objects in an animated scene based on real-world physics. Using the Reactor dynamics and collision detection toolset, you can simply set the starting point and the object behavior and let the software do the work. A Reactor simulation automatically has gravity associated with it, and you can add other forms of forces, such as deflectors and wind.


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