[Chimera-users] Questions about the electric fieldline

xmgign at 126.com xmgign at 126.com
Thu Dec 6 18:22:30 PST 2018

Hi Elaine,
Thanks for your help. 
I have changed the model and now it works. The .dx file is #1. 
So I use the command: measure fieldLines #1 lines 500 startAbove 10 color pink linewidth 2. 
The command works but the field lines do not appear.
Is there any problem of the commands?
Qiao Xue

xmgign at 126.com
From: Elaine Meng
Date: 2018-12-07 00:23
To: xmgign at 126.com
CC: chimera-users
Subject: Re: [Chimera-users] Questions about the electric fieldline
Hi Qiao Xue,
Your command looks OK to me, but are you sure that the dx file is model #0?   Check in the Model Panel (open from Favorites menu) that it is really model #0.  If you have other things open at the same time, like the atomic structure, it could be #1, #2, etc. instead and you should change the model number in the command. Other than that, my only other idea is that the dx file is empty or the wrong format.
I hope this helps,
Elaine C. Meng, Ph.D.                       
UCSF Chimera(X) team
Department of Pharmaceutical Chemistry
University of California, San Francisco
> On Dec 5, 2018, at 11:52 PM, xmgign at 126.com wrote:
> Hi
> I want to make the electric fieldline but there are always some problems.
> I did this as follows,
> 1. run add charge to the system
> 2. run APBS, the I get the electrostatic surface and a file named 1.dx
> 3. open 1.dx
> 4.measure fieldLines #0 lines 500 startAbove 10 color pink linewidth 2
> then I get the problem : no volume specified
> I have check the userguide of measure fieldlines, but there is nothing about the volume. 
> measure fieldLines  map-model(s)  [ lines N ] [ startAbove cutoff ] [ step s ] [ modelId model-number ] [ color line-color ] [ lineWidth width ] [ tubeRadius radius ] [ circleSubdivisions M ] [ markers true|false ]
> what should I do next?
> Thanks.
> Qiao Xue
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