Re: [Visualpython-users] objects only appear as black

[Aaron M. <ajm...@al...>]

Vijay,

I have also seen this on older hardware (on Windows, at least).  The problem
goes away when using the legacy shader rendering.  Make this change by
editing the site_settings.py file (found at
C:\Python27\Lib\site-packages\visual for my windows install) and
uncommenting the line that reads display.enable_shaders = False.

I hope it works for you!

Aaron

------------------------------------------------------
Aaron J. Miller, Ph.D.
Department of Physics
328 Palenske Hall
Albion College, Albion, MI 49224

>
> Message: 5
> Date: Mon, 29 Nov 2010 22:20:19 -0700
> From: Bruce Sherwood <bas...@nc...>
> Subject: Re: [Visualpython-users] objects only appear as black
>        silhouettes
> To: vis...@li...
> Message-ID:
>        <AAN...@ma...<AANLkTin%2B6...@ma...>
> >
> Content-Type: text/plain; charset=ISO-8859-1
>
> The problem almost certainly is that you need to update your graphics
> driver.
>
> Bruce Sherwood
>
> On Mon, Nov 29, 2010 at 7:58 PM, Vijay Somers <vij...@gm...>
> wrote:
> > Hi,
> > I'm just trying to run the following simple bouncing ball example from
> the
> > vpython site:
> >
> > from visual import *
> >
> > floor = box (pos=(0,0,0), length=4, height=0.5, width=4,
> color=color.blue)
> > ball = sphere (pos=(0,4,0), radius=1, color=color.red)
> > ball.velocity = vector(0,-1,0)
> > dt = 0.01
> >
> > while 1:
> > ????rate (100)
> > ????ball.pos = ball.pos + ball.velocity*dt
> > ????if ball.y < ball.radius:
> > ????????ball.velocity.y = abs(ball.velocity.y)
> > ????else:
> > ????????ball.velocity.y = ball.velocity.y - 9.8*dt
> >
> > It runs without errors, but the floor and ball objects are black, without
> > any visible surface detail.? The silhouettes of the objects are visible
> if I
> > change the background colour to something other than black, but changes
> to
> > the colour of the objects don't affect anything.? I'm running this on a
> > fresh install of Ubuntu 10.04, python 2.6.6, and it says I have version
> > 1:5.12-1.1 of vpython.
> >
> > Any help would be appreciated,
> > Thanks,
> > Vijay
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> >
> >
>
>