There is a particular effect I am trying to simulate
It involves first
1 sampling the brightness of pixels and then
2 creating particles whose behaviour is determined from #1
So I am focusing on the first step for now. Using OF how would you sample pixels in an efficient manner from a live webcam stream?
Check out particles from color examples code, plenty available online.
To sample pixel brightness, see these examples, among others
particles!: GPU particle System with multitexturing and optical flow
If it is your webcam, you could write something like:
the camera already has a pixels internally so you don’t need to readback from the texture which is really slow, you can cal: