LIGHT-ECOLOGY GAME: Chiaroscuro instrument

I know that Garret, Omar or any of the cc’d Max-perts can do this, but 

Ian and Michael I propose that you do this in Max as an exercise,
consulting with Pete, Garrett and Julian,
document it, and enter it into our github so we can play with it.

Omar, or Garrett can write and share the code implementing the logic described below extracting “rhythm" from the movement detected from a fiducial.  (Ask Qiao if that is possible.)

We’ve discussed the lighting hardware instruments. 
Let’s now propose some behaviours AKA instruments and games:

LIGHT-ECOLOGY GAME: Chiaroscuro instrument

The array of overhead lights are kept at a medium intensity, flickering with a pattern derived by downsampling a video of glowing embers in closeup.  [ Julian’s code should have a patch to downsample  video to DMX, but it takes minutes to write this in Max / Jitter.]

People who walk onto the floor pick up a trackable fiducial. Depending on which one they pick up, they become a Lightener or Darkener.  [ MoCap in Stauffer B123 supports this — I don't know about iStage.  How many fidicuials can be tracked at a time at most? ]

Where they stand their presence brightens or darkens the lamp under which they stand — adds a +/- offset to the lamp value.

Waving the trackable magnifies their effect — multiply the offset by a ratio as a function of the averaged speed.  Calibrate so that it does not take much effort, and make the slide up very short, but slide-down many many samples — so the decay happens over say 60-300 sec.    Maybe onset of movement should increment (or decrement ) immediately, but the movement extends relaxation to the default average level.