great work slin~~~ but there is something i didn't understand:
1 how do u get the image from web-cam ?does it through the dll u made ?

2 i have seen the video of wii head-tracking and face API,and i have tried to do that in 3dgs,but i can't get the exact result(mine is not that reality,i use camera in 3dgs).after a lot of work i found that they seems not useing the "camera" like things in 3dgs,but useing some projection matrix to get image?

that makes me confused,can u or anyone give me some advice about how can i do that with lite-c?

3i didn't understand how can u recognize the brighter field?useing texture samples of shader?how to get the center point of the field?
thanks very much,and to ur great work