If you look at the vtkProbeFilter code, you can see that the source
dataset (the geometry onto which you are sampling the input dataset),
does not pass its scalars through the filter. I think that when it was
written, it was assumed that probing of the data would occur onto some
new geometry and the comparison you want to make wasn't imagined at the
time. The original scalars are lost.
You should be able to add a PassData(blah blah) at the appropriate place
in the probe filter code and the original scalars will appear alongside
the new ones.
I would do this for you, but my version of the probe filter is modified
somewhat and I don't want to mess about with the necessary
merge/diff/conflicts.
If I have time later in the week (when I'm stuck on a train!) I'll have
a go at it for you.
JB
Did you make sure in the Information tab?
DSZ
Jacques Papper wrote:
The number of points should be the same since I interpolate the data
from one grid onto the other grid first before doing the difference.
Jacques
Dominik Szczerba wrote:
The calculator filter assumes the same number of points, whereas
this is not the case. Note that x1-x2 is undefined if size(x1) !=
size(x2).
Better way to go is to compare bulk values e.g. integrated pressure
over some distinc region or 2D intersection plots along some line.
Dominik
Jacques Papper wrote:
Hi Dominik,
What I mean is that if I load :
grid1, data1
grid2, data2
and
interpolate data1 onto grid2
Then data2 is no longer in the list of variables (see attached
picture),
and I can't use the calculator to do data2-data1
Jacques
Dominik Szczerba wrote:
Yes I am doing something similar. What does it mean 'no longer
have access to data2'?
Dominik
Jacques Papper wrote:
Hi,
I'm trying to interpolate a pressure field from one grid to
another and then compute the difference between the original
pressure field and the interpolated one.
So if I have :
grid1, data1
grid2, data2
I want to
1. interpolate data1 onto grid2
2. compute data2-data1
I try to use the Resample Dataset filter which seems to work for
step 1, but then I no longer have access to data2! Am I doing
something wrong , or do I need to code up the filter so that it
copies the data associated with grid2 ?
If anyone has done something similar in the past -- please help
:) !
Jacques
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