| Term 
 | Definition 
 
        | any frame in which a particular aspect of an item (size, location, color) is specifically defines. The non key-frame frames will then contain interpolated values |  | 
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        | Term 
 | Definition 
 
        | using a ratio to step gradually a variable from one value to another. Linear interpolation == value = (1-alpha) * start + alpha * end; |  | 
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        | Term 
 
        | What is procedural animation? |  | Definition 
 
        | changing the model as the program is running |  | 
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        | Term 
 | Definition 
 
        | is a hierarchy of (transform) bones connected by joints |  | 
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        | Term 
 
        | What is the morphing function? |  | Definition 
 
        | value = (1-alpha) * start + alpha * end; |  | 
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