UML Diagram

For over a week I was trying to transform touch on screen coordinates to 3D coordinates in game world.. as far as now.. no success.. I was trying them all.. color picking.. gluUnProject.. nothing.

probably my math is not good enough for gluUnproject but still.. there is no way of finding good examples or tutorials how to actually us this tech.. or there is something wrong with me.

anyway.. deadline is approaching and I am still straggling with picking an object.. if anyone knows simple solution.. i am more than happy to get it 🙂

the other hand – yesterday I have spent couple hours with friends of mine at university pc lab on other uni project.. Software Engineering UML different diagrams. Below story:
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