Good afternoon everyone;

Is there a way to use GEM with a web-cam or using a Kinect to measure the changing distance between two real world points?

I've a block of ice which I need to measure the distance from base to top and convert the data into cm.
I plan to make an audio signal with a standing wave that changes with the melting of the ice; so I need a measurement that I can work with in an equation.

Any help here would be greatly appreciated

Thank you