VMD-L Mailing List

From: John Stone (johns_at_ks.uiuc.edu)
Date: Tue Sep 20 2005 - 14:34:02 CDT

Axel,
  I'm planning to add some code that'll automatically downsample the
texture map to fit into the available texture memory. If Dan can get
his video driver working correctly, I should be able to give you guys a
binary that will cope with the small 3-D texture memory on those cards.

  John

On Tue, Sep 20, 2005 at 09:17:54PM +0200, Axel Kohlmeyer wrote:
> On Tue, 20 Sep 2005, Dan Strahs wrote:
>
> dan,
>
> DS> I am having a problem with coloring my MSMS-generated surface by
> DS> electrostatic potential. I have APBS installed; in the potential file I've
> DS> uploaded, I know that the maximum/minimum run from approx. -1500 to +1000.
> DS> Yet my surface remains stubbornly white. I've loaded the potential as a DX
>
> that usually means, that your setup does not provide the minimum
> requirement for colormapped surfaces, that VMD requires.
>
> DS> format, I've tried both the graphics trajectory tab and the "color
> DS> scale method RWB" "color scale min -5.0" "color scale max 5.0": no change.
> DS> Altering the range from -0.001/0.001 to -1500/1000 has no effect.
> DS>
> DS> I've enabled the 3d_accelerator: I have Dell GX270 with an Intel 82865G
> DS> chipset on the motherboard. Since I'm running Linux (RH9), I'm using
> DS> XFree86-4.3.0-2.90.55. I have DRI enabled with the i830 driver - the i830
> DS> kernel module is loaded.
>
> first off, if you update to a recent driver from intel, the
> respective module should be named 'gdg'.
>
> DS>
> DS> VMD starts with:
> DS> Info) Multithreading available, 1 CPU detected.
> DS> Info) OpenGL renderer: Mesa GLX Indirect
> DS> Info) Features: RN MTX
>
> please check your X configuration. you do _not_ have DRI enabled.
> if you had, you would see something like this:
>
> Info) OpenGL renderer: Mesa DRI Intel(R) 852GM/855GM 20040331 x86/MMX/SSE2
> Info) Features: STENCIL RN MDE CVA MTX
>
> i have a centrino laptop with intel graphics here, also running RH9.
> for that to work reasonably, i had to update the driver with newer
> software from intel. but still that did not make color mapping work
> for that machine. i _do_ get some colorization, but it is something
> that is supposed to indicate that there is a problem with memory for
> textures. for more details, please see:
> http://www.ks.uiuc.edu/Research/vmd/mailing_list/vmd-l/4734.html
>
> DS> Info) GLSL rendering mode is NOT available.
> DS> Info) Textures: 2-D (2048x2048), Multitexture (6)
> DS>
> DS> Is there some clue here about what's happening? I've uploaded the makefile
> DS> output from the VMD and plugins compile (with configure options LINUX
> DS> OPENGL FLTK TK IMD TCL PTHREADS ACTC PYTHON NUMPY) at these links:
> DS> http://storage.pace.edu/DStrahs/Research/make.log?uniq=-o8hxtn
> DS> http://storage.pace.edu/DStrahs/Research/log.LINUX?uniq=-o8hxts
> DS>
> DS> I would be grateful for any help (other than recommending a different
> DS> graphics card).
>
> sorry, but if you look through the mailing list archives,
> you'll learn that there are next to no alternatives for that
> due to the way surface mapping is implemented in VMD.
>
> axel.
>
> DS>
> DS> Dan Strahs
> DS>
> DS>
>
> --
>
> =======================================================================
> Dr. Axel Kohlmeyer e-mail: axel.kohlmeyer_at_theochem.ruhr-uni-bochum.de
> Lehrstuhl fuer Theoretische Chemie Phone: ++49 (0)234/32-26673
> Ruhr-Universitaet Bochum - NC 03/53 Fax: ++49 (0)234/32-14045
> D-44780 Bochum http://www.theochem.ruhr-uni-bochum.de/~axel.kohlmeyer/
> =======================================================================
> If you make something idiot-proof, the universe creates a better idiot. 

-- 
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