public interface DefaultOriginDoodle extends Doodle
The origin of a doodle is a specific point on the doodle that is interpreted as the doodle's "center of gravity."
Without defining an origin, the idea of transforming a doodle (i.e., rotation, scaling, translation, etc.) is somewhat ambiguous.
This interface models a doodle that defines an origin.
This feature will can be exploited by various decorators, such as
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