In my application, I need to represent simple shapes' projections. For
instance, project a line on a plane. I was thinking about using textures,
but my problem is that my projection will have to be to be rotated and
translated all the time, which, according to what I've noticed in some
examples, is not a very simple task. Another idea I've had was to use indeed
a light-and-shadow effect, but that wouldn't work either, for I need to
project that line on that plane even if some other shape comes in between
    Anyone has any suggestions?


                                Renan M Z Mendes
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