From: Peter Kroon (p.c.kroon_at_rug.nl)
Date: Fri Aug 03 2018 - 09:32:48 CDT

Hi John,

I'll have a look, but my holidays are starting tomorrow, so it'll take a
few weeks before I get back to you.

Peter

On 03-08-18 15:30, John Stone wrote:
> Peter,
> Try the test version of VMD 1.9.4 and let me know if you still
> observe the same phenomena.
>
> Best,
> John
>
> On Fri, Aug 03, 2018 at 11:17:28AM +0200, Peter Kroon wrote:
>> Hi John,
>>
>>
>> no worries, well deserved holidays (and conferences) get priority :)
>>
>> The TachyonInternal does handle DoF correctly (other than the inversion
>> of dof_fnumber). But the problem I have there is that I can't simply
>> tell it to make an image at a resolution of 3kx4k.
>>
>> Scene generation for Tachyon external does work (mostly), but the
>> external Tachyon seems to ignore the FocalLength parameter.
>>
>>
>> Which VMD test version are you referring to exactly? I'm running 1.9.3
>> at the moment.
>>
>>
>> Peter
>>
>>
>> On 02-08-18 18:58, John Stone wrote:
>>> Hi,
>>> Sorry for the slow response, I'm still digging out of a pile of emails
>>> that accumulated while I was away from the office for a few weeks.
>>> Did you try using the built-in version of Tachyon I ship with VMD itself?
>>>
>>> Tachyon always had DoF, but the parameterization has changed somewhat from
>>> the old versions to now, and the way VMD talks to Tachyon has changed also.
>>>
>>> I haven't made the bleeding edge version of the Tachyon code available yet
>>> because I've been revising its API to allow it to support interactive ray
>>> tracing for machines that lack GPUs, and that aren't supported by OSPRay.
>>>
>>> If you have a problem that crops up with the test VMD build (and its built-in
>>> version of Tachyon) on the web site, then let me know and I will address it.
>>> If TachyonInternal works but the external does not, that may be a scene
>>> file generation issue (two different code paths). In any case, it should
>>> be easy to resolve any loose ends that may arise here.
>>>
>>> Best,
>>> John
>>>
>>> On Wed, Aug 01, 2018 at 10:48:45AM +0200, Peter Kroon wrote:
>>>> Hi all!
>>>>
>>>> I sent this mail earlier, but I think it got buried in everyone's
>>>> holidays. Does anyone who's just come back from their well-earned
>>>> holidays and conferences have any insights?
>>>>
>>>>
>>>> Peter
>>>>
>>>>
>>>> On 09-07-18 16:36, Peter Kroon wrote:
>>>>> Hello world!
>>>>>
>>>>>
>>>>> I would like to turn a VMD scene into a pretty picture. I want this
>>>>> picture to be high resolution (~3315x4000px), and using AO and Depth of
>>>>> Field. I have tried the following, continually running into issues:
>>>>>
>>>>> 1) Use Tachyon-OptiX: I can't put the desired resolution. If I do, it
>>>>> fails immediately with a memory error. See also
>>>>> http://www.ks.uiuc.edu/Research/vmd/mailing_list/vmd-l/27940.html
>>>>>
>>>>> 2) Use Tachyon internal: Creates a super fuzzy picture, probably because
>>>>> the meaning of 'Aperture' changed from 'x' to '1/x'.
>>>>>
>>>>> 3) Use external Tachyon renderer: If I fix the 'Aperture'; and changing
>>>>> FocalDist to FocalLength I *almost* get the picture I want, but it seems
>>>>> the FocalLength option is simply ignored (see also
>>>>> http://www.ks.uiuc.edu/Research/vmd/mailing_list/vmd-l/15285.html). This
>>>>> happens with both 0.98.9 and 0.99b6.
>>>>>
>>>>> Does anyone have anything else I can try? I build all the software from
>>>>> source, in case it matters.
>>>>>
>>>>>
>>>>> Peter
>>>>>
>>>
>>
>
>