I see ...
As for me, I just want to do some stuff I never had time/energy to do when I was a teenager, like: vector-stuff on asm. (A couple of years ago finally I managed to do a vector-cube in Amos - no, NOT Amos-3D), I read in a tutorial about that linear algebra was the thing to go for as square-rooting is too slow, I must say I used sguare to pull of the rotation (linear algebra was never my stronger side), is square-rooting really TOO slow copmpared to linear-algebra ?, replies from anyone with experience of vector-coding will really be appreciated ! :-)