Returns the squared distance between this
and other
.
Squared distances can be used for comparisons when the actual value is not required.
T squaredDistanceTo(Point<T> other) { var dx = x - other.x; var dy = y - other.y; return dx * dx + dy * dy; }
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https://api.dartlang.org/stable/2.0.0/dart-math/Point/squaredDistanceTo.html