[Chimera-users] Is "volume #0 voxelSize 1" a isosurface display changes

[Elaine Meng]

Hi Ryan,
Yes, it is the grid spacing, as described in the documentation.
<http://www.rbvi.ucsf.edu/chimera/docs/UsersGuide/midas/molmap.html>

You could also easily verify this for yourself by looking in Volume Viewer (Features… Coordinates) after making the molmap.
Best,
Elaine
-----
Elaine C. Meng, Ph.D.                       
UCSF Chimera(X) team
Department of Pharmaceutical Chemistry
University of California, San Francisco


> On Aug 5, 2019, at 4:52 PM, Ryan Harlich <ryanharlich at hotmail.com> wrote:
> 
> Hi Elaine,
>  
> Thanks. So is command gridSpacing of molmap not the same thing as command voxelSize of volume?
>  
> Best,
> Ryan Harlich
>  
> Sent from Mail for Windows 10
>  
> From: Elaine Meng <meng at cgl.ucsf.edu>
> Sent: Monday, August 5, 2019 2:11:00 PM
> To: Ryan Harlich <ryanharlich at hotmail.com>
> Cc: chimera-users at cgl.ucsf.edu <chimera-users at cgl.ucsf.edu>
> Subject: Re: [Chimera-users] Is "volume #0 voxelSize 1" a isosurface display changes
>  
> Hi Ryan,
> That actually changes the grid spacing, which is part of the information in a volume data file, so yes it would be saved.  I tested it just now with MRC format, but I believe other formats also include voxel size information.
> 
> Not hard to test:
> You can see the voxel size by using Volume Viewer menu: Features… Coordinates.  So if you open a map, you can see its original value, then change the value, then save to file.  Upon reopening the copy that you saved, you can see it has the new value that you changed it to.
> 
> I hope this helps,
> Elaine
> -----
> Elaine C. Meng, Ph.D.
> UCSF Chimera(X) team
> Department of Pharmaceutical Chemistry
> University of California, San Francisco
> 
> > On Aug 5, 2019, at 10:21 AM, Ryan Harlich <ryanharlich at hotmail.com> wrote:
> > 
> > Hi Chimera,
> >  
> > Is "volume #0 voxelSize 1" a isosurface display changes? So if I volume save this would it save this change?
> >  
> > Best,
> > Ryan Harlich
> 
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