rotate ascii image in perl

has anyone ever written a script that will rotate input of multiple lines ascii text by a certain number of degrees?

would love it in perl but if anyone has the same in bourne shell or bash it would be awesome and you would surely achieve satori on your death bed.

It would only be possible to "rotate" a wall of text +/-{pi, pi/2, pi/6} "degrees", at which point it becomes pointless because you can't literally rotate a character.