Hi All,
I have one question regarding this conversation, as I have run into this
issue before. It intrigues me as to why one can't clip a structured data
set efficiently.
http://www.paraview.org/pipermail/paraview/2012-December/026976.html
The question I have is - does clip REALLY require all that memory - in
my case it was a structured grid of 698x693x665 growing to in excess of
20 GB (see the question on the list above). That seems pretty excessive
given the original size of the data set... I haven't done the math on
the data set size of an unstructured data set, but 320MB to 20GB is a
pretty big step.
Assuming one does need 20GB of memory for an unstructured data set of
this size (making it impractical to use clip), is there not an
implementation of clip that can run on structured data. This seems like
a common operation that one would want to perform, and therefore seems
like something that would be worth implementing for structured data.
I find a clip on a volume to be extremely useful, as you can slice
through a plane in the data and see the internal structure of the data
set at the clip plane location. This is a very useful exploratory
capability. Slice just doesn't cut it (pun intended 8-) from this
perspective...
Thanks for the interesting discussion, this one has intrigued (and
frustrated) me for some time. I would think implementing clip on
structured data would be possible (probably simpler than on unstructured
data) and would be quite a useful tool for exploratory analysis of large
gridded data sets... Am I missing something - Is there a reason why such
a thing doesn't exist?
Brian
On 6/10/2014 4:20 AM, Utkarsh Ayachit wrote:
With 'clip' I wanted to see half the volume cut away, while being able
relatively easily to move that cut plane up and down.
You can use the "Extract Subset" filter, however that does not give
you an widget to play with instead you have to enter the i,j,k values
to subset out.
Alternatively if you are not interested in a volume but just a "slice"
through the data, then you can simply change the "Representation" type
from "Outline" or "Surface" to "Slice". You should then can move the
slice plane using the widgets under "Slicing" group on the Properties
Panel.
I don't quite understand what the intended purpose of 'clip' is if not this? Is
it for clipping meshes then rather than clipping volume images?
That is correct. Clip is intended for non structured datasets or when
you need non-orthogonal clipped volumes but at the cost of more
memory.
Utkarsh
_______________________________________________
Powered by www.kitware.com
Visit other Kitware open-source projects at
http://www.kitware.com/opensource/opensource.html
Please keep messages on-topic and check the ParaView Wiki at:
http://paraview.org/Wiki/ParaView
Follow this link to subscribe/unsubscribe:
http://www.paraview.org/mailman/listinfo/paraview
_______________________________________________
Powered by www.kitware.com
Visit other Kitware open-source projects at
http://www.kitware.com/opensource/opensource.html
Please keep messages on-topic and check the ParaView Wiki at:
http://paraview.org/Wiki/ParaView
Follow this link to subscribe/unsubscribe:
http://www.paraview.org/mailman/listinfo/paraview
