Attach arrow to mesh

#1

Hi all,

I have a mesh data set that I can deform using Warp by Vector filter. I also have another data set containing a single force vector (at location [0,0,0], with components [fx(t),fy(t),fz(t)]. I can use Transform filter to move that vector about, but I really want to attach it to a point of the mesh (or something to that effect). Any suggestions?

Kind regards, Eelco

#2

Not very clear. Maybe you are looking for RessampleWithDataset filter ? Or Glyph ?

#3

Sorry for the belated response.

I added some files in an attempt to clarify my question. The mesh consist of just a few random elements due to confidentiality, but i’ll do for now.

“eturret” is a dataset containing the mesh and has attributes displacement and deformation. Only Deformation has values, the displacement is all zero for now.

“mooring” is a dataset containing the data of a force vector.

I use Glyph to create an arrow for the mooring dataset. But I want to move (attach) the base of that arrow to a point on the mesh. Any point really. And I want it to follow that point, even if I apply the Warp by Vector filter to the mesh.

Hopefully this clarifies a little!

eturret.h5 (129.9 KB) eturret.xmf (45.1 KB) mooring.h5 (41.2 KB) mooring.xmf (35.3 KB) test.pvsm (564.2 KB)

#4

There is not direct way to do that.

But there is the “specific” way and the “convoluted” way.

For the specific way, you will need to implement a simple programmable filter that will take two inputs, the mesh and the mooring, and copy the mooring vector into each points of the mesh. You can then use a glyph without any issue. You still need to implement it in python. Let me know if you need help.
https://www.paraview.org/Wiki/Python_Programmable_Filter

The convoluted way is a bit more tricky but does not require any python. Here it is :
testConvoluted.pvsm (834.6 KB)

The idea of this is that we consider your Arrow Glyph as a source input for a Glyph with custom source applied on the mesh. The problem is that your mooring is not located in the origin on the space, so I had to translate it. If the translation is constant with all your moorings or if this translation can be removed in post-process, this solution might be acceptable.