Animation Playback

Animation playback values

Animation data are defined by key frames. The method used to interpolate between key frames depends on the segment type. As shown in the figure, values before the first key always take the value of the first key. Values after the last key always take the value of the last key.

Animation frames

The time axis for the animation is expressed in units of frames. The figure examines a single frame of animation. If you extract and inspect frame 0, it goes from 0.0 to 0.9999.... It does not include 1.0. That value (i.e., 1.0) is included in the next frame.

Controlling playback of animation frames

Animations are classified by the way frame playback is controlled into one-time animations and loop animations.

• One-time animation: The animation is played through only once and stops after the final frame.
• Loop animation: The animation is played through repeatedly, with the start frame and the end frame in the same state.

Controlling playback of one-time animations

In a one-time animation, the end frame contains a termination. Once the terminating frame plays, the updating of frames stops.

Controlling playback of loop animations

In loop animation, the end frame does not contain a termination. An interpolation calculation is conducted between the end frame and the start frame. The animation plays to the very end and then begins replaying again from the start frame.

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