yesbird wrote:

> In Rebelle API I am limited to vector
> operations of brush movement (press, move, release):
>
https://www.escapemotions.com/products/rebelle/motionio_doc/reference/json_events_reference/

Hmm.
Not to say any of this is directly applicable, but maybe check out "Mathematical
marbling"

https://people.csail.mit.edu/jaffer/Marbling/

Especially:  https://people.csail.mit.edu/jaffer/Marbling/stroke.pdf

And skim through Daniel Schiffman's _The Coding Train_ youtube channel.
He has a lot of interactive, mouse-position events in his code, and other people
submit derivative works on his website.

Maybe you could have a collection of Convolution Kernels that you could drag
across an image with the mouse.
Barrel/pincushion optical effect
Color discretization
etc

- BW

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