[Visualpython-users] PovExport and arrows

[Guy K. K. <g....@ma...>]

Hi,

I've been playing a bit with PovExport as provided in the FAQ. Works quite 
nicely so far, but ...

 * There's a bug with drawing arrows. An arrow is a hybrid, POVray wants
   a transparency, not an opacity. So the transparency() function is applied
   twice, and arrows are not visible, or their transparency is inverted.

 * Simple solution: Create a function get_opacity() in the same way as
   transparency(), but "invert" the behaviour (not "1.0 - a", but "a", and
   not "1.0" but "0.0" in the else clause)

 * the povexport module does not handle arrows properlyh that have a changed
   shaftwidth.

Guy

-- 
Guy K. Kloss
Institute of Information and Mathematical Sciences
Te Kura Pūtaiao o Mōhiohio me Pāngarau
Massey University, Albany (North Shore City, Auckland)
473 State Highway 17, Gate 1, Mailroom, Quad B Building
voice: +64 9 414-0800 ext. 9585   fax: +64 9 441-8181
G....@ma... http://www.massey.ac.nz/~gkloss