VMD-L Mailing List

From: Dipesh Bhattarai (dipesh.bhattarai_at_gmail.com)
Date: Fri Feb 12 2010 - 11:57:03 CST

Excellent. Thank you for the pointer. I will try this approach. This could
actually solve my problem.

Dipesh

On Fri, Feb 12, 2010 at 11:32 AM, John Stone <johns_at_ks.uiuc.edu> wrote:

>
> Hi,
> For the GUIs, have you considered using a hand-held device like a
> wireless tablet to control VMD? When NCSA had a CAVE setup in
> my building, we would either redirect the X11 GUIs to a console at
> the back wall of the CAVE, or we would setup a very simple Tk GUI
> that would trigger the most useful actions within VMD via a remote
> socket connection. You can do things like that with just a little
> bit of scripting without having to change any of the core VMD code.
> Having a tablet device is handy, as they are often easier to interact
> with than a 3-D immersive style GUI, particularly for things that
> are awkward to represent in the form of 3-D buttons or menu objects
> that you have to pierce with a tracker. I find that retaining a simple
> 2-D GUI controlled by a hand-held device is more convenient than
> going 100% into VR-only-GUIs...
>
> Cheers,
> John Stone
> vmd_at_ks.uiuc.edu
>
> On Fri, Feb 12, 2010 at 09:24:58AM -0600, Dipesh Bhattarai wrote:
> > Thanks for your reply. The problem was with transformation of the
> tracker
> > position with transformation_matrix in the display device. It is
> solved
> > now.
> >
> > As for the subclassing VMD tracker class, I let VR Juggler handle all
> the
> > detail about accessing and updating the tracker status. I use the
> > information received from VR Juggler and pass that to VMD. So far,
> > selection works fine. But adding programmability to the selection is
> > creating problem. That is more to do with lack of GUI in the
> > multiprojector environment than anything other. I still don't know how
> to
> > proceed with that. Buttons in the wand are all used up for one
> > functionality or the other.
> >
> > Thanks,
> >
> > Dipesh
> >
> > On Fri, Feb 12, 2010 at 12:26 AM, John Stone <johns_at_ks.uiuc.edu>
> wrote:
> >
> > Hi,
> > Have you implemented VMD tracker subclass(es) for your 3-D tracker?
> > I would begin by doing that, otherwise you may be way off in
> > your coordinate system. If you have a tracker subclass implemented,
> > then you should be able to use the various "tool" modes in the
> > VMD tool menu to see the position of your tracker on the screen,
> > and to interact with button events etc. Once you have that sorted
> > out, you could implement other interactions beyond what's already
> there.
> > Without seeing the entirety of the code you've written, it is
> difficult
> > to judge what you're having trouble with. Unless VMD is actually
> > drawing
> > the pointer for you via the normal class hierarchy, I cannot say
> > whether what you're seeing on the screen with your pointer
> > is even relevant as far as the pick calls go. If you can provide me
> > with the code you're working with, I can try and give you
> suggestions
> > for solving your problem as time allows.
> >
> > Cheers,
> > John Stone
> > vmd_at_ks.uiuc.edu
> >
> > On Mon, Feb 08, 2010 at 10:57:03AM -0600, Dipesh Bhattarai wrote:
> > > Hello all,
> > >
> > > I am trying to select subset of the molecule using a 3D
> pointing
> > device.
> > > The device is tracked by Intersense IS-900 tracking system and
> is
> > accessed
> > > through VRPN. I am using VR Juggler to tie the VMD with the
> > multiprojector
> > > display and the device. I call app->pickList->pick_check()
> method
> > to see
> > > if there are any atoms near the current position of the 3D
> pointing
> > > device. Even though the location of the cursor looks to be
> > overlapping,
> > > the method does not actually return anything. Sometime it seems
> to
> > select
> > > something, but the picked items does not actually correspond to
> the
> > item
> > > near the cursor position. I believe it is because the tracker
> > position and
> > > VMD use different coordinate systems.
> > >
> > > How do I transform the 3D cursor position so that it correspond
> to
> > the
> > > coordinate system VMD use? I would appreciate any pointer to
> the
> > solution.
> > >
> > > Thanks,
> > > Dipesh
> > >
> > > --
> > > Dipesh Bhattarai, PhD
> >
> > --
> > 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
> >
> > --
> > Dipesh Bhattarai, PhD
>
> --
> 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/ <http://www.ks.uiuc.edu/%7Ejohns/>
> Fax: 217-244-6078
> 

-- 
Dipesh Bhattarai, PhD