egon Lv 1
I'm not running an extremely fast computer so waiting for the tweak tool to rotate is painful.
Here's a suggestion to make it work faster.
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First do the rotation of structure - ignore everything else, that means no moving, adjusting, calculating score nor adjusting ends of the structure.
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After the user decides for a rotation then rebuild the ends of the structure (helix) until a position that is possible is found.
Usually you have to those two steps anyway so if you don't to the rebuilding, wiggling or moving while rotating I think it would be a lot faster.