VMD-L Mailing List

From: Oliver Beckstein (oliver_at_biop.ox.ac.uk)
Date: Mon Feb 07 2005 - 10:58:50 CST

John,

> I assume you've got the latest NVidia drivers installed for your
> video board?

Yes, 1.0-6629 is the latest one.

> What resolution is the potential map you're trying to load?

129x129x129

Info) Analyzing Volume...
Info) Grid size: 129x129x129 (32 MB)
Info) Total voxels: 2146689
Info) Min: -747.528870 Max: 633.049377 Range: 1380.578247
Info) Computing volume gradient map for smooth shading
Info) Added volume data, name=pot.dx : regular positions regular
connections

Hmm---is it perhaps a problem with the range of values?

Any help is appreciated,
Oliver

> On Mon, Feb 07, 2005 at 04:03:34PM +0000, Oliver Beckstein wrote:
> > Hi,
> >
> > I would like to create grasp-like electrostatic maps. I produced a pot.dx
> > potential map with apbs and tried to colour a 'surf' or 'msms' surface
> > using the new volume colouring feature. However, the surface stays
> > uniformly black although I would expect some variation along
> > red-white-blue (I think this is set with the colour scale.)
> >
> > Also, volume slice gives me a black surface. The iso contour
> > representation works as expected, though.
> >
> > Do I need OpenGL shading for this to work?
> >
> > When I try Display>Render Mode>GLSL I get "Warning) OpenGL Programmable
> > Shading not available."
> >
> > (I have
> >
> > VMD 1.8.3b1
> >
> > Info) OpenGL renderer: Quadro4 900 XGL/AGP/SSE
> > Info) Features: STENCIL MSAA(4) RN MDE CVA MTX TCM PP PS GLSL SHO SHV
> > Info) OpenGL Programmable shading is NOT available.
> > Info) Textures: 2-D (4096x4096), 3-D (512x512x512), Multitexture (4)
> >
> > Fedora Core 3, xorg (nothing special in xorg.conf),
> > NVIDIA-Linux-x86-1.0-6629 )
> >
> > Thanks,
> > Oliver
> >
> > --
> > Oliver Beckstein * oliver_at_biop.ox.ac.uk
> > http://sansom.biop.ox.ac.uk/oliver/
>
> --
> NIH Resource for Macromolecular Modeling and Bioinformatics
> Beckman Institute for Advanced Science and Technology
> University of Illinois, 405 N. Mathews Ave, Urbana, IL 61801
> Email: johns_at_ks.uiuc.edu Phone: 217-244-3349
> WWW: http://www.ks.uiuc.edu/~johns/ Fax: 217-244-6078
>
> 

-- 
Oliver Beckstein * oliver_at_biop.ox.ac.uk
 http://sansom.biop.ox.ac.uk/oliver/