[chimerax-users] multiple isosurfaces for one map

[Tom Goddard]

Hi Daniel,

  Elaine is right, the Volume Viewer GUI only handles all surfaces of one volume model having the same style (surface or mesh).  ChimeraX can display the different surfaces in different styles using commands but not with the GUI.  The reason the GUI doesn't allow it is it makes the user interface too complicated.  I try to keep the user interface simple to give best serve most users.  I'll make a feature request for handling mixed mesh and surface in the gui and maybe some day I'll think of a way to add it that keeps it simple.

	https://www.rbvi.ucsf.edu/trac/ChimeraX/ticket/4019

  Tom

> On Dec 4, 2020, at 8:30 AM, Elaine Meng <meng at cgl.ucsf.edu> wrote:
> 
> Hi Daniel,
> If you mean for the same dataset (multiple levels on the same histogram), in my tests the isosurfaces are all the same style... so if you change one isosurface from mesh to surface using the Volume Viewer interface, the other levels on the same dataset will also change from mesh to surface. 
> 
> However, I could use the "surface style" command after looking in the Model panel to see the submodel numbers of the different isosurfaces.
> 
> For example, I had volume #2 with isosurfaces #2.1 and #2.2.  In ChimeraX it did not work to specify #2.1 or #2.2 in the "volume" command because they are surface models, but I could use commands like:
> 
> surface style #2.1 solid
> 
> ...however, as soon as I moved the threshold in the Volume Viewer, it reverted back to "mesh" since that was the chosen volume style.  
> 
> So if you really want to be able to adjust the level and keep it different style from the other level, I believe you would need to open the dataset twice and treat it as if it were two different datasets. 
> 
> I hope this helps,
> Elaine
> -----
> Elaine C. Meng, Ph.D.                       
> UCSF Chimera(X) team
> Department of Pharmaceutical Chemistry
> University of California, San Francisco
> 
> 
>> On Dec 4, 2020, at 7:44 AM, Guillaume Gaullier <guillaume at gaullier.org> wrote:
>> 
>> Hi Daniel,
>> 
>> Yes, I just tried, and saw it’s possible to display both with distinct styles and colors. In the volume viewer, the style and color options will only apply to the threshold cursor you moved or clicked last. I did not pay close attention to what the log reported when I tried, but it printed commands, so there is definitely a way to achieve the same thing with commands.
>> 
>> I hope this helps,
>> 
>> Guillaume
>> 
>> 
>>> On 4 Dec 2020, at 15:08, Daniel Larsson <daniel.larsson at icm.uu.se> wrote:
>>> 
>>> Hi Elaine,
>>> 
>>> Thank you for pointing out that if one right-clicks in the histogram of the volume in the volume viewer window, one can add a level. It was also easy to add another surface by giving multiple level arguments to the volume command.
>>> 
>>> Is it possible to show one contour as surface and one as mesh?
>>> 
>>> Regards,
>>> Daniel
>>> 
>>> 
>>> 
>>>> On 2020-11-19, at 17:17, Elaine Meng <meng at cgl.ucsf.edu> wrote:
>>>> 
>>>> Hi Daniel,
>>>> Yes, often more than one isosurface is shown for a given map, and besides or as an alternative to making the outer one transparent, you can use the mesh style.  The Volume Viewer tool's context menu  (shown with right-click, except on Mac Ctrl-click) includes choices to add or delete thresholds, i.e. contour levels.
>>>> <http://rbvi.ucsf.edu/chimerax/docs/user/tools/volumeviewer.html>
>>>> 
>>>> Or it can be done with commands, as in the first example in the "volume" command documentation:
>>>> <http://rbvi.ucsf.edu/chimerax/docs/user/commands/volume.html>
>>>> 
>>>> volume #1 style mesh level 0.8 color red level 1.2 color 0,50,80
>>>> 
>>>> I hope this helps,
>>>> Elaine
>>>> -----
>>>> Elaine C. Meng, Ph.D.
>>>> UCSF Chimera(X) team
>>>> Department of Pharmaceutical Chemistry
>>>> University of California, San Francisco
>>>> 
>>>>> On Nov 19, 2020, at 12:35 AM, Daniel Larsson <daniel.larsson at icm.uu.se> wrote:
>>>>> 
>>>>> Is it possible to visualize two surfaces for the same model? I was thinking for example for the purpose of showing two different levels of a map with the lower one as a semi-transparent surface. The work-around is to load the same map twice into two different models, but that will take up more memory and is more cumbersome.
>>>>> Regards,
>>>>> Daniel
>>>> 
>>> 
>>> 
>>> 
>>> 
>>> 
>>> 
>>> 
>>> 
>>> 
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