Added calculation of values. Also fixed some stuff for the normals.
Added calculation of values. Also fixed some stuff for the normals.

chrisidefix/visvis,Alwnikrotikz/visvis,pbfy0/visvis,chrisidefix/visvis,Alwnikrotikz/visvis,chrisidefix/visvis,Alwnikrotikz/visvis,pbfy0/visvis,pbfy0/visvis