Existing methods for beam direction computing in resonators, e.g. iterative ray tracing or generalized ray transfer matrices, are either computationally expensive or rely on overparametrized models of optical elements.

England struck back with a fine try from Ben Foden and closed to within seven points with three minutes left when Mark Cueto capitalised on a break from replacement Matt Banahan.

Cor, strike a light! Did you see him jump into the river?

I'll be out all day, so page me if you need me.