I love OpenFrameworks 
Smoke! from Ralph Kok on Vimeo.
This is an effect done in OpenFrameworks, which is similar to my last video, but uses the webcam in a more visible way.
Fluid flowfield from Ralph Kok on Vimeo.
Lots of particles reacting to webcam input, on top of a blur. It’s so simple 
A simple flowfield with reactive particles made in OpenFrameworks.
Please excuse the poor compression.
Webcam-based flowfield from Ralph Kok on Vimeo.
These are particles responding to a webcam feed, made in OpenFrameworks. (Please excuse the compression)
Yesterday, I ported my AS3 lightning renderer to OpenFrameworks with the help of Rick Companje and Joris Rotteveel.
Edit: download the source at the OpenFrameworks forum
Check out the video: