Animated graphical score for Bach BWV 1080 (Art of Fugue) Canon 4 (canon at the twelfth)
The first step was to categorize the material in the canon
I'd just done a video of the
third Art of Fugue canon,
and it seemed that a similar approach would work here.
Having done it before,
I knew what kind of framework I needed,
so I set about compiling the necessary tables
vertical offsets based on transposition,
angular offsets based on destination,
rotation timing) and,
to help me navigate,
I made a version of the score that was annotated with as much information
I needed to refer to as I could cram into it
Next, I chopped up the score to correspond to how I'd
defined/conceivedOf the phrases in the piece.
Finally, the coding
to turn all this into an animation. In that script
(written in an XML variant I designed for specifying my animations),
the "heavy lifting" is done by a "renderer" that turns notes into shapes
for an [incomplete] list of renderers I've developed).
Here's the code for this one.
The final result looks like this
(you can watch the animation