lua.wetgenes.tardis.m4.scale
m4 = m4:scale(s)
m4 = m4:scale(s,r)
m4 = m4:scale(x,y,z)
m4 = m4:scale(x,y,z,r)
m4 = m4:scale(v3)
m4 = m4:scale(v3,r)
Scale this m4 by {s,s,s} or {x,y,z} or v3.
If r is provided then the result is written into r and returned otherwise m4 is modified and returned.