dave

here’s the #processing code which made this (or something similar) https://git.io/vH53d 

Thanks for sharing, lots to learn from this :)

god speed — didn’t write this code with other readers in mind...

Haha yes I feel there might be questions, a lot of them being 'so...maths?' :) Any reason for setup() after draw() ?

the draw() up top i copy & paste from sketch to sketch; it implements motion blur. the “real” draw() is draw_(), if that makes any sense...