CSG Code

[Leon Pennington]

Hi, 

Updated the code, and have some new screenshots at 
http://www.leonscape.co.uk/linux/csgcalc/index.html 

The merging is what I wanted, I just need to add tesselization for multiple 
levels of CSG. For the same 870 poly spheres timings are only 0.33 seconds 
slower from 1.05 to 1.38 

In fact if we are prepared to take a few extra lines ( only in certain 
circumstances ) then I can get 0.77 seconds.

-- 
Leon Pennington

"If you give someone a program, you will frustrate them for a day; if you 
teach them how to program, you will frustrate them for a lifetime."