[diagrams] diagrams status

[Brent Yorgey]

On Fri, Aug 20, 2010 at 05:39:17PM +0100, Brent Yorgey wrote:
> On Fri, Aug 20, 2010 at 12:23:03PM -0400, Ryan Yates wrote:
>
> > explicitly set normals.  I searched around some and found [1] which uses the
> > transpose of the inverse of the transformation.  I haven't had time to work
> >  up any tests but we *could* get the transpose by converting to a matrix
> > (transform with each basis vector to get the matrix) and then transposing
> > that but it seems like it would be pretty ugly and I don't know if that
> 
> Interesting, I look forward to hearing more.  Yes, getting a matrix
> out can be done but it is a bit ugly.

Of course, we could also just keep the inverse transpose around just
like we keep the inverse around, then no matrices would be necessary.

-Brent