A pan mode would indeed be useful, and as you saw in an obsolete
"4beta" page it briefly existed. At about that time there was a big
upheaval in VPython development, and in the process of major progress
it wasn't possible to keep the beta-level pan mechanism. It is
certainly something worth implementing in the future.
I draw your attention to an entry in the "contributed programs"
section of vpython.org:
Zoom and spin under complete program control (Bruce Sherwood)
You could probably enhance this with not much effort to offer a pan mode.
If your graphics card doesn't have an acceleration mode, I don't see
how you can make the hardware go faster.
Bruce Sherwood
On Sat, Mar 26, 2011 at 9:27 AM, Christian Jauvin <cj...@gm...> wrote:
> Hi,
>
> Please excuse in advance my "3d newbiness", as I might be missing some
> obvious background knowledge, or my question not be totally clear.
>
> I am rendering a complex point cloud scene and while the default zoom
> and spin mouse interface is working well, I find that I miss the
> ability to pan the camera (or the scene) to obtain a better view.
>
> I have played with what I found in many example programs (i.e.
> modifying the scene.center vector in a simple way), but it's never
> exactly what I need. The only reference I found to what I (possibly)
> need is on this page:
>
> http://vpython.org/webdoc/texture-opacity-lighting.html
>
> where they mention a new "pan" mode. But then it doesn't seem to be
> implemented in the version I'm running, which is 5.12 on Ubuntu 10.04
> 64-bit.
>
> And finally, I'd like to know if there are some settings that could
> enhance VPython's performance on my non-3d-accelerated laptop.
>
> Best regards,
>
> Christian
>
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