[Chimera-users] Surfaces

Tom Goddard goddard at cgl.ucsf.edu
Fri Aug 15 12:04:08 PDT 2008

Hi Hernando,

  Slow rotation of surfaces could mean your surface is simply big.  Is 
it faster in an older Chimera?  What are the Chimera versions and PDB 
identifiers where there is a difference?  Do you have multisampling on 
(Favorites / Viewing Controls / Effects)?  Chimera 1.2540 also uses an 
optimization called vertex buffer objects that produces a 2-3x speedup 
on most graphics cards.  But it could be slower on old cards.  What 
graphics card and driver are you using?  Chimera menu Help / Report a 
Bug... will include that info in the description.


hsosa at aecom.yu.edu wrote:
> Hi Elaine,
> The problem does not happen all the time. Sometimes I can display 
> surfaces from the pdbs that cause problems. However, after displaying 
> surfaces from these files, running chimera (trying to rotate or move the 
> molecules) becomes very slow.
> This is the error message I get when failing to display surfaces:
> C:\Program Files\Chimera\bin\mscalc.exe 1.400000 2.000000 1
> Calculation of some surface components failed (code 5).
> Falling back to single-component calculation.
> C:\Program Files\Chimera\bin\mscalc.exe 1.400000 2.000000 0
> Surface calculation failed, mscalc returned code 5
> Two pdb files that I've been having problems with are 1JFF and 2P4N.
> Thanks
> Hernando

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