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#93 Consider making NormalVector3D class
It might give some efficiency if there was a NormalVector3D subclass of Vector3D.
This would always return an abs of 1
It would return itself as a result of normalize
You would get one when you called normalize on Vector3D.
It would probably be made with static methods rather than a constructor, for instance:
Vector3D NormalVector3D.normalize(Vector3D v){
return new NormalVector(v.x/v.abs(), v.y/v.abs(), v.z/v.abs());
}
Just a thought.