Every animation should have a beginning, a middle, and an end: a case study of using a functor-based animation language

Authors:
Kevin Matlage;Andy Gill
Affiliations:
Department of Electrical Engineering and Computer Science, The University of Kansas, Lawrence, KS;Department of Electrical Engineering and Computer Science, The University of Kansas, Lawrence, KS
Venue:
TFP'10 Proceedings of the 11th international conference on Trends in functional programming
Year:
2010

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Abstract

Animations are sequences of still images chained together to tell a story. Every story should have a beginning, a middle, and an end. We argue that this advice leads to a simple and useful idiom for creating an animation Domain Specific Language (DSL). We introduce our animation DSL, and show how it captures the concept of beginning, middle, and end inside a Haskell applicative functor we call Active. We have an implementation of our DSL inside the image generation accelerator, ChalkBoard, and we use our DSL on an extended example, animating a visual demonstration of the Pythagorean Theorem.