equals
Rounded, orientation-sensitive identity: equal when every component matches at the SCALE quantum.
A circle and its inside-out twin (negated components) trace the same point set with opposite interiors and compare unequal; compare canonical on both sides for unoriented equivalence. Identity is exact-class: a subclass instance and a plain Circle never compare equal.
Return
true iff other shares this object's exact class and its four components all match after rounding.
Parameters
other
The object to compare against.