I am working on a project where I need to use a mocap camera to act as a switch. In real time when a subject is in alignment data will stream. When the subject is out of alignment I need software that will stop the data stream until the subject is back into alignment. This is very basic stuff but as a newbie I need help. Any cost effective suggestions as this is a research project and we have very little cash. Also could an x box kinects sensor be used. Need help.

Thanks in advance.
P