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On a whim I spent just a little time poking around with Google to
investigate how difficult it would be to set up a virtual space with a
viewpoint that can be zoomed, dollyed, and panned. This could be in a
browser or in a separate viewer. At first blush it seems that panning
the camera or rotating an object is easy, also zoom, but dollying the
camera not so? Is this true? Does this function present a particlar
hurtle that panning and zooming doesn't? Google maps does it. Does the
difficulty increase linearly or exponentially?
-Jim
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