Hi Leon,
Look at the source code of panotools. In particular check the file
math.c. you will find all the math (very simple, actually) you need
there.
The cubic projection is really 6 rectilinear projections, each
pointing in the direction of the orthogonal to the plane of the cube,
with a field of view of 90 degrees vertical and horizontal.
To go from cylindrical to cubic I recommend you do a composition of
two functions: from cylindrical to equirectangular, and then from
equirectangular to cubic (rectlinear).
This is a good source of information:
http://mathworld.wolfram.com/EquirectangularProjection.html
Leon Moctezuma twisted the bytes to say:
Leon> Hi Daniel
Leon> I'm Leon, I'm the cs student that is applying for the interactive panoramic
Leon> viewer idea,
Leon> I was talking with Yuval about the renderer and he commented to me, that
Leon> there is a
Leon> way to transform cylindrical and equirectangular format to cubic format,
Leon> furthermore
Leon> he told me you could have info about this, if you have any paper, web page
Leon> or algorithm
Leon> please let me know and send it to my mail.
Leon> Thanks for all...
Leon> León Moctezuma.
Leon> Hi Daniel<br><br>I'm Leon, I'm the cs student that is applying for the interactive panoramic viewer idea,<br>I was talking with Yuval about the renderer and he commented to me, that there is a<br>way to transform cylindrical and equirectangular format to cubic format, furthermore
Leon> <br>he told me you could have info about this, if you have any paper, web page or algorithm<br>please let me know and send it to my mail.<br><br>Thanks for all...<br><br>León Moctezuma.<br>

Daniel M. German "Great algorithms are
Francis Sullivan > the poetry of computation"
http://turingmachine.org/
http://silvernegative.com/
dmg (at) uvic (dot) ca
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