Beauty button now is Beauty and Short.
Works as follows
Beauty on: If a face is selected, only subdivide the longest 2 sides
Beauty & Short on: If a face is selected, only subdivide the shortest 2 sides
1 problem atm is when more than 2 sides are equal. Must add code to check for this and disable beauty on that face. Use with caution! :)
Also restoring selection needs to be tweaked here.
Side Note: for most accurate subdividing, use edge mode and select only the edges you wish to cut rather than relying on beauty.
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