One thing that I would consider, but that would require a bit of a rewrite, is to keep "Math::Vector" general to n dimensions, and create "Math::Vector::3D" for the specific 3-dimensional extentions that you have (eg x(), y(), z()). You'd have to add some size checks on the operations that take two vectors, of course.
Dr. Michael K. Neylon - firstname.lastname@example.org
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