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An actor in an animation is a small program invoked _______ per frame to determine the characteristics of some object in the animation.

  • A.once
  • B.twice
  • C.30 times
  • D.60 times

Answer: A

An actor in an animation is a small program invoked once per frame to determine the characteristics of some object in the animation: on each frame it is run a single time to decide where the object is and how it looks. The answer is (A).

Running it twice, 30 times or 60 times per frame would repeat the computation with no gain, since the frame shows only one state of the object. The rates of 30 or 60 relate to the number of frames per second, not to the invocations per frame.

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