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Mar 7, 2013 at 3:03 comment added David Moles +1 for making it clear whether the camera moves or the world is just a function of which coordinate system you're talking about.
Oct 28, 2012 at 12:40 comment added danijar Although for me the mathematical explanation is clear and understandable, this is also a great explanation! I believe that you helped many others with the same question.
Oct 28, 2012 at 12:34 history answered Sean Middleditch CC BY-SA 3.0