Talk:SmileBASIC (Petit Computer 3)/@comment-70.180.86.186-20150719015222/@comment-5334617-20150720031806

Thanks @Bluesun1. The graph is of arctangent, as I would expect it to be if they were trying to use values of 'z' as if they were a linear distance towards/away from the user. I have found a close match to the curve you show: 4981*(1.4677-atan(9.6667-5*x/3)).