# Message #1298

From: Andrey <andreyastrelin@yahoo.com>

Subject: Re: [MC4D] 8Colors solved

Date: Tue, 28 Dec 2010 17:36:26 -0000

Roice,

Thank you for the feedback. I think that the reason of 3-cycle in 8Colors is not in chirality of the pattern, but in the number of 4C in one face: 14 is not a multiple of 3. If you make 120-deg twist of the face, sum of twists of all 4C will be 120*14=-120 deg, and then it’s possible to solve the resulting position by commutators that preserve sum of rotation angles (my way of solving was longer because I haven’t found "pure" 3-cycle of 2C in one face). So I guess that in all puzzles with non-3*k 2Cs in one face (i.e. more than half of puzzles) will have such problem.

For the Poincare ball view I haven’t changed mouse controls, so they behave same way as for real view. I’ll think about changing of left-drag directions.

About other points:

- yes, ctrl-left click doesn’t work now. I turned it off when it performed MANY times instead of ctrl-shift-left click. It’s difficult to undo its action.
- click during animation? I’ll check. I thought that second click is ignored, but may be it found some way to be performed.
- animated undo - yes, and it will not be fixed. I save only logical numbers of stickers, not their geometric instances (and correspondence is changing every time when some stickers appear/disappear). So I get the sticker with the given logical number that is closest to the face center, and show rotation around it.

Good luck again!

Andrey