Description:
the om equivalant of the modalisp
(transform 'homothethy sth-to-be-homothety central-point homothety-rate),
the homothety is equal to the similarity in geometry,
the first argument could be:
1. point of (list x y z)
2. list of points of (list x y z)
3. bpc (or in some case bpf)
4. bpc-lib (or in some case bpc-lib)
5. 3dc
6. 3dc-lib
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