I want to add friction forces to my computer game. I know there are tables for friction, however I don't think that encoding big table of coefficients (of size $n^2$) is a good idea.
I thought, that there may exist some characteristic $\lambda$ for each material, so that friction between materials $a$ and $b$ is approximated by $\mu_{a,b}=f(\lambda_a, \lambda_b)$ for some function $f$.
Do such characteristic and function $f$ exist? Note that I need this for computer game and I don't need big accuracy, only correct behavior.
