Space Models

["Mr R.J. Morris" <rmorris at liverpool.ac.uk>]

Hi everyone, its about time this list got a bit of trafic!

I've been playing with visulising projective space, and it seemed
that the spherical space might be worth an investigation as RP^3 fits
twice into S^3. So I don't do anything silly it would be nice
to know what each of the space models actually do, i.e. given a point
in R^4 how do you get the coresponding point in R^3. It would also
be intresting to workout where in the source code this happens,
I had a look through it, but I keep getting lost.

	Chears in advance

		Rich Morris