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" <[EMAIL PROTECTED]> 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" <[EMAIL PROTECTED]> 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: [EMAIL PROTECTED]
** *** ** phone: (505) 844-8919
*** web: http://www.cs.unm.edu/~kmorel
<http://www.cs.unm.edu/%7Ekmorel>
**** Kenneth Moreland
*** Sandia National Laboratories
***********
*** *** *** email: [EMAIL PROTECTED]
** *** ** phone: (505) 844-8919
*** web: http://www.cs.unm.edu/~kmorel <http://www.cs.unm.edu/%7Ekmorel>
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