[Visualpython-users] VPython

[Bruce P. <bap...@te...>]

<<snip>>>
 > This error was generated because you assigned the color of a label
 > object to be a vector, when it wants a 3-tuple.
 >
 > If this is a serious problem for you, then I can implement a workaround
 > that would accept any 3-element sequence to be a color, but I don't
 > think it is appropriate to use vectors for specifying a color.
 >
 > In the meantime, you can use the built-in function tuple(sequence) to
 > construct a tuple from any sequence (Visual's vectors are sequences), or
 > you can use the special member function vector.as_tuple() for a faster

That would be vector.astuple(), with no '_'.

 > conversion in performance-sensitive code.

-Jonathan

Thanks -- that worked -- I agree that colors are more appropriately tuples. 
I was using a vector difference to define complementary colors so that a 
label would show regardless of the background color.  I forgot to translate 
the vector difference back to a tuple -- and the old VPython was willing to 
accept this.

Bruce Peterson
425 466 7344