New DLL and new VPython for Windows at
http://cil.andrew.cmu.edu/projects/visual
Recently I discovered that large coordinates (bigger than about 1e45) were
not handled correctly. This broke when we went from Python 1.5 to Python
2.0 but wasn't noticed until now. (A program that worked last December
didn't work any more.)
David Scherer suggested changing floats to doubles in some critical parts
of Visual. David Andersen tried this and found that it indeed fixes the
problem.
It turns out that this also fixes a seemingly unrelated problem that crept
in with Python 2.0. The demo programs wave.py and drape.py sometimes
flickered, putting a curve endpoint momentarily at the upper right corner
of the window. This bug is now gone.
Our best guess, but it is only a guess at this time, is that some aspect of
the Numeric module changed with the change to Python 2.0, in a way that
affected Visual, which uses Numeric arrays in various ways.
Bruce Sherwood
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