python 3.10.9, vpython 7.6.4 - no screen

[Radhakrishnan Swaminathan]

Hi,

I am having a strange problem. I have a laptop with windows 10, python 3.10.9 and vpython 7.6.4 and I have a code that nicely simulates what I have written. I have a new desktop that I built with AMD 8350, with windows 10, python 3.10.9 and vpython 7.6.4. The same code when I run, opens the browser and displays a blank screen. I even tried a simple code to display just a box, still a blank screen.

Any suggestions? Thank you.

[Radhakrishnan Swaminathan]

btw. I am using a conda virtual env and run the code from an anaconda terminal

[Bruce Sherwood]

I suggest the following test:

from vpython import *
print(version) # should be ['7.6.4', 'jupyter']
a = vec(1,2,3)
b = vec(4,5,6)
print(a+b)     # should be <5, 7, 9>

Also, go to https://get.webgl.org/
You should see a rotating wire frame box.

Next, go to https://browserleaks.com/webgl
and report whether both WebGL and WebGL2 are checked True.

What browser are you using?

Bruce

[Radhakrishnan Swaminathan]

Hi Bruce,

TY for responding. webGL2 is not enabled. I am trying to enable it in all the browsers (Chrome and firefox) but they are not getting enabled.

- I see a wireframe rotating in the first link you gave.
- The code piece that you suggested worked as expected.

WebGL Support Detection
This browser supports WebGL ✔True
This browser supports WebGL 2 ×False (supported, but disabled in browser settings, or blocked by extensions)

Regards,

Radhakrishnan

[Bruce Sherwood]

WebGL2 has been supported in all browsers for a long time, and VPython started using WebGL2 a long time ago. Perhaps this suggests that the problem could be with your graphics card, though the message about browser settings and extensions is suggestive.

Bruce

[Radhakrishnan Swaminathan]

Hi Bruce,

TY. I will check. My graphics card is NVIDIA GeForce 9500 GT and the motherboard is AMD 8350.

Regards,

Radhakrishnan

[Radhakrishnan Swaminathan]

Hi,

Tried to get an openGL report with OpenGL Extension Viewer. It says openGL supported is 3.0, 3.1, 3.2, and 3.3. Does it mean, there is no support for openGL2. A little bit confusing for me.

Regards,

Radhakrishnan

[Bruce Sherwood]

That's odd. When I go to the main WebGL site, https://www.opengl.org, I see the latest version is WebGL 2.

Bruce

[Radhakrishnan Swaminathan]

Hi,

Is there any way I can see the error messages that it is not able to draw because of webGL2 etc.., somewhere?

Thank you.

Regards,

Radhakrishnan

[Radhakrishnan Swaminathan]

Hi Bruce,

Thanks a lot for all the help. Basically, I had to turn off hardware acceleration in "chrome" to make this work. Another easy place to check was "get.webgl.org/webgl2". This is the same URL you had suggested with "/webgl2" added to it.

Regards,

Radhakrishnan