   How to do Real-Time excvavtor's machine hand?
  HI,Guys.First,I'm sorry.My English is poor.I'm a Programmer.I think to Develop a Real-Time excvavtor's machine hand motion.But I have no idea.How does do this?I see a game used Unity3D Game Engine Done.The Demo in here:http://www.vrart.cn/works/view/read/20081030/5922030702.shtmlI want know how to do it. Thank you everyone.   