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Chapter 1. Building Complexity > Shape-Tweening Strategies

Shape-Tweening Strategies

Shape tweening is a technique for interpolating amorphous changes that can’t be accomplished with instance transformations such as rotation, scale, and skew. Fill, outline, gradient, and alpha are all shape attributes that can be shape-tweened.

Flash applies a shape tween by using what it considers to be the most efficient, direct route. This method sometimes has unpredictable results, creating overlapping shapes or seemingly random holes that appear and merge (Figure 1.33). These undesirable effects usually are the result of keyframes containing shapes that are too complex to tween at the same time.


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