equals
Rounded identity: equal when every component matches at the SCALE quantum.
Identity is exact-class with one carve-out: a RoundDirection and a plain RoundPoint are the same kind of value — the refinement adds no data — and compare by components alone, in both directions. Any other subclass instance and a plain RoundPoint never compare equal.
Return
true iff other shares this object's identity domain and its four components all match after rounding.
Parameters
other
The object to compare against.