[General] Pvpython find centroid dataset

maero21 · February 6, 2014, 07:52

Dear Paraview users,

I am working on a script to automatically generate pictures from my OpenFOAM cases. In order for it to be fully automated, I want to know the centroid of my dataset in order to focus the camera on it.
Is there any way to find that? Or perhaps a method to convert the VTK data to a numpy array and then use mean?

Thanks!

wyldckat · February 16, 2014, 13:32

Greetings maero21,

I believe what you are looking for is a combination of the following:

Use the "Integrate Variables" filter to calculate the centroid. It will be the array "Points" that gives you the centroid.
On this post: Get data from Calculator filter in python script post #6 - you can see how to get access to this value.
On this post: http://www.cfd-online.com/Forums/ope...tml#post446333 post #6 - you can see how to update values with each time change.

Best regards,
Bruno

February 6, 2014, 07:52	Pvpython find centroid dataset	#1
maero21 New Member Anonymous Join Date: Aug 2013 Location: Europe Posts: 24 Rep Power: 13	Dear Paraview users, I am working on a script to automatically generate pictures from my OpenFOAM cases. In order for it to be fully automated, I want to know the centroid of my dataset in order to focus the camera on it. Is there any way to find that? Or perhaps a method to convert the VTK data to a numpy array and then use mean? Thanks!

February 16, 2014, 13:32		#2
wyldckat Retired Super Moderator Bruno Santos Join Date: Mar 2009 Location: Lisbon, Portugal Posts: 10,981 Blog Entries: 45 Rep Power: 128	Greetings maero21, I believe what you are looking for is a combination of the following: Use the "Integrate Variables" filter to calculate the centroid. It will be the array "Points" that gives you the centroid. On this post: Get data from Calculator filter in python script post #6 - you can see how to get access to this value. On this post: http://www.cfd-online.com/Forums/ope...tml#post446333 post #6 - you can see how to update values with each time change. Best regards, Bruno

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