visualpython-users

[Visualpython-users] sphere ok, box missing 5 faces

[Jack W. <sou...@ja...>]

Hello, this is probably a newbie problem.

Completely clean compile and install on debian testing/unstable, python 2.3

import visual as V
V.box()

gives me just one face (apparently the near face). I've altered the
lights, and ambient level, but i see nothing. V.sphere() gives me a
sphere, shaded correctly, and cylinder works, too.

Any suggestions would be very welcome.

This vpython module is awesome. Could I suggest adding support for
transformations using direction cosine matrices? I.e. define a frame of
reference in three unit vectors, then the conversion to and from a
frame of reference can be done by matrix multiplication of a vector with 
the DCM or its inverse. This would be very handy for 3d manipulations...

Thanks,
Jack

Re: [Visualpython-users] sphere ok, box missing 5 faces

[Martin G. <mar...@co...>]

Jack,
This is not a problem:  everything is (apparently) working as it should.
If you hold down the middle mouse button you should be able to zoom in 
and out; if you hold down the right mouse button you should be able
to view the cube from different orientations.  You'll then see that the
various faces are lighted differently.
Regards,
Marty
On Wednesday 18 August 2004 08:09 am, Jack Wasey wrote:
> Hello, this is probably a newbie problem.
>
> Completely clean compile and install on debian testing/unstable, python 2.3
>
> import visual as V
> V.box()
>
> gives me just one face (apparently the near face). I've altered the
> lights, and ambient level, but i see nothing. V.sphere() gives me a
> sphere, shaded correctly, and cylinder works, too.
>
> Any suggestions would be very welcome.
>
> This vpython module is awesome. Could I suggest adding support for
> transformations using direction cosine matrices? I.e. define a frame of
> reference in three unit vectors, then the conversion to and from a
> frame of reference can be done by matrix multiplication of a vector with
> the DCM or its inverse. This would be very handy for 3d manipulations...
>
> Thanks,
> Jack
>
>
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Martin Gelfand

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