[PyOpenGL-Users] Strange things happening with glLight

[<lax...@ya...>]

I want to place a light at a certain position, namely (0, 1, -6). I tried doing it this way:
    glLightfv(GL_LIGHT0, GL_POSITION, [0, 1, -6])
and also this way:
    glLightfv(GL_LIGHT0, GL_POSITION, [0, 1, -6, 0])
and I did not get the result I wanted (the light wasn't where it was supposed to be). Oh, this
reminds me of another thing - what is that 4th value for with all the glLight calls? In three
dimensions one has three coordinates.

After some fiddling, I ended up with code like this:
    lightpos = [0, 1, -6]
    glLightfv(GL_LIGHT0, GL_POSITION, lightpos)
This code produced the desired results. Considering I changed nothing except the fact that I put
the same exact list in a variable before calling the function, I am very confused as to why the
2nd version worked and not the first. Can anyone help me out?
- Claudiu    





		
Discover Yahoo! 
Find restaurants, movies, travel and more fun for the weekend. Check it out! 
http://discover.yahoo.com/weekend.html