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

[Vijay S. <vij...@gm...>]

Thanks, that worked.  Does making this change lower my machine's rendering
performance while using vpython?

On Tue, Nov 30, 2010 at 11:58 AM, Aaron Miller <ajm...@al...> wrote:

> 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
>> ___________________
>> > Visualpython-users mailing list
>> > Vis...@li...
>> > https://lists.sourceforge.net/lists/listinfo/visualpython-users
>> >
>> >
>>
>>
>
>
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