Re: Vectors must have length 2 or 3

I don't see how that could ever have worked. The origin assignment is
attempting to add a vector varGVMapper.CurrentObject.pos, which I
assume is a vector, to a tuple. It is true that you could say origin =
(0,1.8,0), in which case VPython silently converts the tuple to a
vector, but it won't convert the tuple when added to a vector.

The error message isn't helpful, though....

Bruce Sherwood

On Wed, Aug 31, 2011 at 10:30 PM, Roberto Aguirre Maturana
<[email protected]> wrote:
> Hi,
>
> I'm returning to a project I haven't worked on since version 3 of VPython.
> Back in the days, the following line of code
>
> self.frameScale.rotate (angle = pi/2., axis = (1.0, 0.0, 0.0), origin =
> (varGVMapper.CurrentObject.pos + (0,1.8,0)))
>
> used to work just fine. However, with the latest version of VPython it
> raises the following error:
>
> ValueError: Vectors must have length 2 or 3
>
> What seems to be the problem?
>
> Best regards,
> Roberto Aguirre Maturana.
>
>
> --
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