Any novel ways to detect acceleration of a blob in GEM?

is this what you mean?

You could use [delta] instead of my whole rigamarole, btw.

http://www.pdpatchrepo.info/hurleur/blob.acceleration.pd

I'm interested to know how to use [delta]!

delta gives you the derivative of a stream. Which I implemented in my patch with [t f b] [-] and [f]. the derivative of position is velocity, and the derivative of velocity is acceleration. So I guess you need

[delta]
|
[delta]

to get acceleration. My patch was hasty, and provides you with x and y velocities, rather than accelerations. My fault!

No worries. The [delta] object works well. Are there any example patches on how to use 2nd-order [delta]?

All the best!

2nd order [delta] is the same as chaining 2 [delta]s in series like I did earlier. The help patch shows how the outputs are related. To more fully understand [delta], read up on calculus. No shortcuts there, I'm afraid.

The hardest part of calculus is bad teachers and poorly written high school texts. Good luck!

Thanks Sunji.