Message #1231

From: Melinda Green <>
Subject: Re: [MC4D] Re: MHT633 v0.1 uploaded
Date: Thu, 28 Oct 2010 21:37:08 -0700

On 10/28/2010 6:10 PM, Roice Nelson wrote:
> Regarding Roice’s mentioning of contiguous (not "continuous")
> cubies in
> which stickers on the same cubie exactly touch each other, it never
> seemed possible to get a good set of parameters with this constraint
> needed to make MC4D workable, but maybe it would work in this case. It
> is definitely a closer analog to the original Rubik puzzles.
> There is a way to make the implementation of this much easier, which I
> used in M120C. Instead of shrinking the stickers based on their
> centers, you shrink them from appropriate points on the cell boundary.
> You also make it so that when the cell size is set to maximum, it
> fits the cell boundary of the parent polytope (which is a very natural
> choice anyway). Then you will always have contiguous cubies when the
> cell size is maxed out, regardless of the sticker shrink value. This
> avoids an awkward dependence of contiguous cubies on both the face
> shrink and sticker shrink parameters (requiring constraint
> calculations to get a working set).

That’s brilliant! I’ve added this as issue 105
<>. Thank you