| Weird 3-D warping woes [message #10518] |
Mon, 08 December 1997 00:00 |
Deb Summa
Messages: 2
Registered: December 1997
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Junior Member |
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Here's an annoying problem that probably has a pretty simple solution
which i can't see for the life of me.
I have a chunk of code that wraps an image around a cylinder. It does
this using polyfill with the pattern and image_coord keywords in the
z-buffer, then reads back the z-buffer and tv's it to the screen. The
procedure works fine ..in most cases:)
I have another chunk of code in the same application that warps an image
around a sphere. The code uses Map_Set, Map_Image and Map_Grid. This
works fine too, always (well, near as i can tell).
The problem arises when i call the cylindrical warping function AFTER
the spherical warping module has been called. The original image data
is intact and accessible (i can tv to the screen). When I switch to the
z-buffer and do the rendering, everything appears to go smoothly, but
when i read back the image and TV it to the screen, the screen usually
comes up blank.
Can anyone hazard a guess as to what's happening and how to fix the
problem?
Deb Summa
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