KABOOM in 180 lines of bare C++
Impressive effect.<p>I didn't realize openmp was so easy to use.  It isn't realtime but you could bake up some cool effects with this.<p>AMD FX8320 3.5GHz<p>$ time ./tinykaboom<p>real    0m4.176s
user    0m28.631
sys     0m0.012s