[GRASSLIST:3544] Re: NVIZ - visualization problem

[H.]

--- Glynn Clements <glynn.clements at virgin.net> wrote:
> marino vetuschi zuccolini wrote:
> > All runs ok if the model is 'totally' in between the NVIZ 
> > visualization window or without the principal NVIZ menu windows above 
> > it.
> > IF I try to zoom the model and a border of the 3D model only touch or 
> > overpasses a window border, a vent of coloured bands start from a 
> > point in the lower left side of the window and the model is covered 
> > by this patches of colors. Obviously I cannot see anithing else.
>
> My guess would be a bug in your OpenGL implementation.


I've had this problem as well. Making the window bigger and then being
careful not to go over the edge helped. As did moving to a much faster
computer with DRI enabled (run glxinfo, look for direct rendering: Yes)

Happened with a huge region with lots of data (40km^2, 5m grid), and
zooming in with the Perspective slider 'seemed' to make it worse, but it
wasn't limited to that. Didn't happen everytime, but more so the further
you zoomed in.

Happened a lot with: 550MHz PIII 384mb RAM, ATI Mach64 video (no DRI),
Debian Woody, grass5.0pre3, glutg3 v3.7, X 4.1.0.

Didn't happen as much with: 1600+ Athlon 768mb RAM, Matrox video (DRI On),
newish RedHat, grass5.0pre3 ... 

? I'd guess it was an OpenGL driver issue as well.. ?



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