[Paraview] Multiple temporal shifts still not working right
John Biddiscombe
biddisco at cscs.ch
Tue Dec 2 04:00:46 EST 2008
Eric,
I had a temporal problem and made a small change to
vtkCompositeDataPipeline which fixed my trouble. It occurred to me (and
I confess that due to other deadlines, I have not followed this thread
carefully, but I will fix the problem after Christmas) - that perhaps
your problem was related.
Try this
open vtkCompositeDataPipeline
search for two lines with hasRTD = true and comment them out - like so!
// hasRTD = true;
Now tell me if your pipeline does what you expect.
I don't know why REQUIRES_TIME_DOWNSTREAM is actually being forwarded up
the pipeline, the executive should replace the output of the filter it
is working with now, and others can do as they please. I was getting all
sorts of nonsense with multiple temporal filters causing outputs to be
replaced all over the place, this solved it.
It may not be applicable to your case, but if it works...please let me know.
JB
> I added this information to the bug report.
>
> -Ken
>
>
> On 11/25/08 11:33 AM, "Eric E. Monson" <emonson at cs.duke.edu> wrote:
>
> Hey Ken,
>
> Thanks a lot for looking into this -- I'm sure it was a pleasure
> to see it pop up again! :)
>
> Your workaround using the temporal cache filter seems to work as
> long as I do the grouping in the "correct" order. If I first click
> on the shift(0) filter, and then command-click to also select the
> shift(1) filter and then group the data sets, stepping forward in
> time only shows one point, but then backwards in time shows the
> correct thing: two points trailing each other. If I select the
> shift(1) first and then the shift(0), stepping forwards in time
> works, but not backwards. (Although, I still get a "stutter"
> sometimes where on the second click forwards after applying the
> group filter the points collapse for one step...)
>
> If I select in the "wrong" order, but increase the size of the
> caches (up from the original 2), I can get the points to look
> right for one or two steps forwards sometimes. They always look
> right going forward if I've just stepped backwards through that
> time range so the data is in the caches.
>
> So, temporal caching fixes it if the filters are selected in the
> "right" order for the order in which the time is going to be
> stepped...
>
> Thanks,
> -Eric
>
>
> On Nov 24, 2008, at 6:58 PM, Moreland, Kenneth wrote:
>
> Nuts. I guess it wasn’t fixed after all. I submitted a new bug
> report with your new description.
>
> http://www.paraview.org/Bug/view.php?id=8156
>
> Note that I think I found a workaround using the temporal
> cache filter. (Details in the bug report.)
>
> -Ken
>
>
> On 11/21/08 8:15 AM, "Eric E. Monson" <emonson at cs.duke.edu> wrote:
>
>
> Hey,
>
> Sorry for the long email, but I find this problem difficult to
> describe succinctly...
>
> In February I was trying to use multiple Temporal Shift
> Scale filters
> as input to a Python Programmable Filter to do on-the-fly
> point
> velocity calculations (for diffusing particles in my
> simulation
> output). There were troubles with the pipeline updating
> properly, and
> Ken Moreland came up with a nice self-contained test case
> and filed
> the bug 6307:
>
> http://www.paraview.org/Bug/view.php?id=6307
>
> which was listed in August as "fixed" because the test
> case seemed to
> work now. But, I don't think this is really resolved yet.
>
> If you load in the TimeShiftTest2.pvsm state file, the
> animation seems
> to play correctly, but I think that's a red herring. If
> you turn off
> the visibility of the TemporalShiftScale filters, you can
> see that no
> boxes move until after t=1.0, whereas if the temporal
> filters are
> turned on, and the group filter is turned off, one box
> moves and then
> the other.
>
> I don't know if this helps, but if you look at the Output
> printed by
> the Python filter in TimeShiftTest1.pvsm, you can see that the
> temporal data sets have the correct time, but the
> ImageData within
> them doesn't match.
> ......
>
> All of this is much more clear to me when I load in a
> simple data set
> with one point moving in time (attached Xdmf data set --
> I'll also
> attach a link to a state file which sets this pipeline up,
> but you'll
> have to change the path for the data file in the state
> file manually
> if you want to use it).
>
> The pipeline is: Load data. Add a Temporal Shift Scale
> with (post)
> shift=0. Add another TSS off the original data set with
> (post) shift =
> 1. Highlight both TSSs and route into a Python
> Programmable Filter
> with Unstructured Grid output and this script:
>
> in0 = self.GetInputDataObject(0,0)
> ds0 = in0.GetTimeStep(0)
> in1 = self.GetInputDataObject(0,1)
> ds1 = in1.GetTimeStep(0)
> print 'in1 t = %.1f' %
> in1.GetInformation().Get(in1.DATA_TIME_STEPS(),0)
> print 'ds1 t = %.1f' %
> ds1.GetInformation().Get(ds1.DATA_TIME_STEPS(),0)
> print 'in0 t = %.1f' %
> in0.GetInformation().Get(in0.DATA_TIME_STEPS(),0)
> print 'ds0 t = %.1f' %
> ds0.GetInformation().Get(ds0.DATA_TIME_STEPS(),0)
> out1 = self.GetOutputDataObject(0)
> out1.ShallowCopy(ds0)
> print 'out1 t = %.1f' %
> out1.GetInformation().Get(out1.DATA_TIME_STEPS(),0)
>
> When I animate this (PV CVS or 3.4, OS X 10.5.5), with the
> TSSs on and
> the PPF off, I see the expected: two points, one following
> the other.
> When the TSSs are off and the PPF is on, only one point
> shows up.
> Also, the behavior is different if the animation is
> stepped backwards
> rather than forwards. And, the printed Output times from
> the PPF show
> one of the ImageData sets time doesn't match its temporal
> host.
>
> As in Ken's example, this works very similarly with a
> Group filter in
> place of the PPF.
>
> This still seems very confusing, and I hope someone will
> have some clue!
>
> Thanks,
> -Eric
>
> ------------------------------------------------------
> Eric E Monson
> Duke Visualization Technology Group
>
> Test data set:
>
>
>
>
>
> **** Kenneth Moreland
> *** Sandia National Laboratories
> ***********
> *** *** *** email: kmorel at sandia.gov
> ** *** ** phone: (505) 844-8919
> *** web: http://www.cs.unm.edu/~kmorel
> <http://www.cs.unm.edu/%7Ekmorel>
>
>
>
>
>
>
>
> **** Kenneth Moreland
> *** Sandia National Laboratories
> ***********
> *** *** *** email: kmorel at sandia.gov
> ** *** ** phone: (505) 844-8919
> *** web: http://www.cs.unm.edu/~kmorel <http://www.cs.unm.edu/%7Ekmorel>
>
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