I would like to propose the addition of a position property for the
base Effect class. By adding this dynamic property external objects,
as well as callback functions know exactly how far along the effect
has been rendered. It should be kept up-to-date in the render method,
before or after the beforeUpdate event call I guess. I''m not sure.
I think it would be a great addition, because one can take a running
effect, get it''s position and start the same effect again using a
different starting value (from:) for example.
Opinions on this matter are greatly appreciated!
