This is a proposal to support alternative geometry models by implementation of an additional command "dbgeom" to switch the geometry model for the currently open database as follows:
Where model can be:
default - an alias for rhzup
lhyup - left hand (with y up, z back)
lhzup - left hand (with z up, y back)
rhyup - right hand (with y up, z forward)
rhzup - right hand (with z up, y forward)
The default model will be rhzup, which corresponds to the geometry model currently in use.
If model is omitted, then the dbgeom command can simply outputs the current geometry model for the database.
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