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Apply translate and rotate to user_defined cameras.#470
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user_defined cameras don't apply transformations to the user defined functions. This makes them more difficult to work with when moving the camera. This commit will apply transformations, if present, after the user defined functions.
You can see some discussion of the issue here. It can be worked around. For rotations, the work around makes the user defined functions much more complicated.
http://news.povray.org/povray.general/thread/%3CXnsA9E3A3F647A49seed7%40news.povray.org%3E/
http://news.povray.org/povray.binaries.images/thread/%3C5cec7461%40news.povray.org%3E/
The patch creates a transform in the camera to store the transformations as they are applied to the camera. When the rays are calculated, the user defined function is applied first, followed by the transform.