9 Sep
2008
9 Sep
'08
1:47 p.m.
On 9/8/08, Fred lunnon <fred.lunnon@gmail.com> wrote:
... [but complemented first, in order to place the origin at a corner].
Oops --- dodgy --- binary complement does not commute with Gray-code! But if we just try to play it straight, it already falls over for 4x4: Gray 000 001 011 010 110 111 101 100 x/y ___0 __1 __2 __3 __4 __5 __6 __7 000 000 [0,0] 000 001 [0,1] 001 001 [1,1] 001 000 [1,0] 001 010 [1,3] ?? 001 011 [1,2] 000 011 [0,2] 000 010 [0,3] 010 010 [3,3] 010 011 [3,2] 011 011 [2,2] 011 010 [2,3] 011 000 [2,0] 011 001 [2,1] 010 001 [3,1] 010 000 [3,0] WFL