How to use infrared to complete man-machine interaction in vvvv?

I have finished a project in vvvv.I just use a mouse to interact with it.
now ,I have an idea of projeting the project on the wall.after that I can interact with the drop shadow.
before writing this forum,i known leap motion can do it .but it only two hands…
So i want to know what template in vvvv can connect to the infrared .
please help me…
And how to do it?
thank you.

to check:

I would have a look at the image pack. You can use its VideoIn-node, convert it to a DX9 or DX11 Texture, and do for example a threshhold effect and invert that. The more tricky thing is the camera and projector setup and calibration.