From: Maxim Belkin (mbelkin_at_ks.uiuc.edu)
Date: Thu Nov 27 2014 - 12:27:54 CST

> On Nov 27, 2014, at 03:19, Norman Geist <norman.geist_at_uni-greifswald.de> wrote:
>
>
>> -----Ursprüngliche Nachricht-----
>> Von: owner-vmd-l_at_ks.uiuc.edu [mailto:owner-vmd-l_at_ks.uiuc.edu] Im
>> Auftrag von John Stone
>> Gesendet: Mittwoch, 26. November 2014 20:42
>> An: Norman Geist
>> Cc: VMD Mailing List
>> Betreff: Re: vmd-l: Re: Need testers: VMD 1.9.2 w/ interactive GPU ray
>> tracing w/ AO, depth of field, etc.
>>
>> Norman,
>> Thanks for the note. The depth of field focal blur effect
>> will work fine on any size structure if the aperature (f/stop number)
>> and focal distance are set appropriately. It is easiest to adjust
>> these parameters while using the interactive ray tracer, since you can
>> see the effects of changing parameters immediately.
>>
>> That said, it is critically important to note that depth-of-field is
>> currently only available when rendering with a perspective projection.
>>
>> If you're using orthographic projection, the depth of field effect will
>> be disabled in both Tachyon and in the GPU-accelerated TachyonL-OptiX
>> renderers in VMD.
>
> Guess this was the issue =D
> After some playing with the arrow keys I was able to produce a nice picture.

I find it easier to set dof_fnumber and dof_focaldist manually first and then adjust them with the arrow keys.

>
>>
>> Thanks for noting about OptiX working for you over ssh now. Did you
>> have
>> to change anything on your end, or just running the new VMD version
>> solved the problem?? If just running the new version solved the
>> problem,
>> this may be due to the newer version of the OptiX library that's linked
>> into
>> the latest test builds.
>
> No, i didn't change anything on my site, simply using
> vmd-1.9.2beta1optixtest4 solved it.
> Thanks.
>
>>
>> Cheers,
>> John Stone
>> vmd_at_ks.uiuc.edu
>>
>> On Wed, Nov 26, 2014 at 09:32:21AM +0100, Norman Geist wrote:
>>> Hey John,
>>>
>>> The 1st thing that came to my mind when I tried the interactive
>> Tachyon was:
>>> "Cool" ;D
>>> I didn't really understood how the depth-of-field blur is supposed to
>> work,
>>> maybe it only shows effect
>>> on rather large systems which actually have a particular physical
>> depth.
>>>
>>> Away from that, using Optix via ssh now also works for us.
>>>
>>> Norman Geist.
>>>
>>>> -----Ursprüngliche Nachricht-----
>>>> Von: owner-vmd-l_at_ks.uiuc.edu [mailto:owner-vmd-l_at_ks.uiuc.edu] Im
>>>> Auftrag von John Stone
>>>> Gesendet: Donnerstag, 13. November 2014 07:22
>>>> An: vmd-l_at_ks.uiuc.edu
>>>> Betreff: vmd-l: Re: Need testers: VMD 1.9.2 w/ interactive GPU ray
>>>> tracing w/ AO, depth of field, etc.
>>>>
>>>> Hi,
>>>> I've posted another updated test version of VMD with the
>>>> interactive GPU-accelerated ray tracer. The new version adds
>>>> support for depth-of-field effects (see new items at the bottom of
>> the
>>>> "Display Settings" menu), and many other improvements:
>>>> http://www.ks.uiuc.edu/Research/vmd/alpha/optix/
>>>>
>>>> I will be posting new example images with depth of field and
>>>> other features tomorrow as I get a chance.
>>>>
>>>> Cheers,
>>>> John Stone
>>>> vmd_at_ks.uiuc.edu
>>>>
>>>>
>>>> On Thu, Oct 30, 2014 at 11:33:12AM -0500, John Stone wrote:
>>>>> Hi,
>>>>> Since VMD 1.9.2 beta 1 was released, I have been working
>>>>> hard on making the first version of a new interactive GPU ray
>>>>> tracing feature available before VMD 1.9.2 ships. I have had
>>>>> a small group of people testing the code up until now, but I
>>>>> think it's time to get feedback from a broader range of users,
>>>>> particularly since several hundred people have already been
>>>>> downloading and testing the previous VMD beta version that
>>>>> includes the batch-only version of the GPU ray tracer.
>>>>>
>>>>> The new VMD build _REQUIRES_ the latest NVIDIA driver versions.
>>>>> You MUST be running NVIDIA driver version 344.xx or later
>> otherwise
>>>>> you will not be able to use new GPU ray tracer.
>>>>> Best results will be obtained on GPUs that contain several
>> gigabytes
>>>>> of GPU memory. GPUs with 4GB of memory are in the sweet spot
>> where
>>>>> you can render even fairly large scenes without running out of
>>>> memory.
>>>>>
>>>>> The reward for going through the trouble to update to the latest
>>>>> driver version is that this new version of VMD can do real-time
>>>>> interactive ray tracing for large molecular scenes, at rates of
>>>>> 20 to 60 frames per second, even when sophisticated rendering
>>>>> effects such as ambient occlusion light or depth of field are
>>>>> enabled, by virtue of the use of a progressive rendering approach
>>>>> that refines the image when the view orientation is not changing.
>>>>>
>>>>> The new interactive GPU ray tracer is currently listed in the VMD
>>>>> File|Render menu as "TachyonL-OptiX (live real-time GPU
>> display)".
>>>>>
>>>>> The interactive ray tracer will open a new graphics display
>> window,
>>>>> which uses similar control keys to the main VMD graphics display,
>>>>> and it also supports the use of the SpaceNavigator input devices.
>>>>>
>>>>> I have posted a 64-bit Linux VMD test build for RHEL 5.x systems,
>>>>> and I'm writing initial documentation for it here:
>>>>> http://www.ks.uiuc.edu/Research/vmd/alpha/optix/
>>>>>
>>>>> The new VMD test version also supports depth-of-field rendering
>> in
>>>>> the standard CPU versions Tachyon, and POV-Ray.
>>>>>
>>>>> I would appreciate feedback users have when they begin testing
>>>>> the new features. I will be updating the documentation as
>>>>> questions, problems, and solutions arise.
>>>>>
>>>>> Cheers,
>>>>> John Stone
>>>>> vmd_at_ks.uiuc.edu
>>>>>
>>>>> --
>>>>> NIH Center for Macromolecular Modeling and Bioinformatics
>>>>> Beckman Institute for Advanced Science and Technology
>>>>> University of Illinois, 405 N. Mathews Ave, Urbana, IL 61801
>>>>> http://www.ks.uiuc.edu/~johns/ Phone: 217-244-3349
>>>>> http://www.ks.uiuc.edu/Research/vmd/
>>>>
>>>> --
>>>> NIH Center for Macromolecular Modeling and Bioinformatics
>>>> Beckman Institute for Advanced Science and Technology
>>>> University of Illinois, 405 N. Mathews Ave, Urbana, IL 61801
>>>> http://www.ks.uiuc.edu/~johns/ Phone: 217-244-3349
>>>> http://www.ks.uiuc.edu/Research/vmd/
>>>
>>>
>>> ---
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>>
>> --
>> NIH Center for Macromolecular Modeling and Bioinformatics
>> Beckman Institute for Advanced Science and Technology
>> University of Illinois, 405 N. Mathews Ave, Urbana, IL 61801
>> http://www.ks.uiuc.edu/~johns/ Phone: 217-244-3349
>> http://www.ks.uiuc.edu/Research/vmd/
>