I'm fairly new to Processing, recently I found a tutorial on  http://www.creativeapplications.net/processing/augmented-reality-with-processing-tutorial-processing/ that made me very interested in AR in general.

I have read the whole tutorial but I didn't find anything regarding object interaction, at least not with the use of Processing. Basically what I mean is: I want to know, when I load my 3D models on each marker, how can I make them interact with each other? 

I would be really grateful if someone answers, this is really important for me.

Thank you,

Panke