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Explain different reasons for implementing animation.

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1. Enhance emotional impact
e.g., dove softly flapping its wings -> peace
e.g., air bag explosion + dummy movements -> car crash. 

 2. Make a point 
e.g., show insertion of a memory chip onto the motherboard (much better than a diagram) e.g., Microsoft Golf (instructional) 

 3. Improve information delivery 
e.g., "pulsing" words (in and out of screen) adds emphasis

 4. Indicate passage of time
e.g., clock/hourglass -> program still running e.g., animated text -> to prompt for interaction/response

 5. Provide a transition to next subsection
Wipes - e.g., L-to-R, T-D, B-U, diagonal, iris round, center to edge, etc.
Dissolve - the current image distorts into an unrecognizable form before the next clear image appears, e.g., boxy dissolve, cross dissolve, etc. 
Fade - a metaphor for a complete change of scene
Cut - immediate change to next image, e.g., for making story points using close-up ** Cuts are easy to detect in "video segmentation".

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