Hi,
I did a little experiment, capturing 3D interference form a laser.
Although the Adruino code is older and not my best, I still want to share it.
The Processing Code is included.
There's a video here: Homemade 3D Optical Interference Scanner - YouTube
Sled020.ino (4.66 KB)
Camera050.pde (3.57 KB)
Very cool project and nice video too!
In the video when you're talking about your global variables you mention that you don't remember whether you're using error any more. Something I find really useful is to make all the globals that are only used in my sketch static. After doing that when you turn on compiler warnings in File > Preferences you will get a warning message for any global that is not used. So if you change line 51 to:
static byte error;
you get the warning:
C:\Users\per\AppData\Local\Temp\arduino_modified_sketch_443145\Sled020.ino:51:13: warning: 'error' defined but not used [-Wunused-variable]
static byte error;