[Paraview] Attach arrows onto streamlines/stream tubes more smoothly

Hi,

How does it look if you Glyph the streamlines themselves instead of the
tubes?

Post by Liang Wang
By using the arrow glyph filter on the lines/tubes, the arrows are often
slightly dislocated (and thus slightly misaligned) from the tubes
themselves (see the attached image).
In comparison, I am trying to get images like http://www.tecplot.com/wp-
content/uploads/2016/01/fstream.jpg or https://i.stack.imgur.com/z8nkm.png
Logically, the arrows could have been an attribute of the
streamlines/stream tubes?
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Liang Wang

2017-03-15 21:59:07 UTC

Hi Andy,

The results are similar if I apply glyph on streamlines directly (see the
attached image).

I guess the difficulty part is that arrow heads are not easily centered on
lines/tubes?

Post by Andy Bauer
Hi,
How does it look if you Glyph the streamlines themselves instead of the
tubes?

Post by Liang Wang
By using the arrow glyph filter on the lines/tubes, the arrows are often
slightly dislocated (and thus slightly misaligned) from the tubes
themselves (see the attached image).
In comparison, I am trying to get images like
http://www.tecplot.com/wp-content/uploads/2016/01/fstream.jpg or
https://i.stack.imgur.com/z8nkm.png
Logically, the arrows could have been an attribute of the
streamlines/stream tubes?
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Visit other Kitware open-source projects at
http://www.kitware.com/opensource/opensource.html
http://paraview.org/Wiki/ParaView
Search the list archives at: http://markmail.org/search/?q=ParaView
http://public.kitware.com/mailman/listinfo/paraview

Andy Bauer

2017-03-15 22:16:06 UTC

I think it is because you have set the Shaft radius to 0. The start of the
arrow doesn't appear because of this and I'm suspecting that the start of
the arrow is centered along the streamline. Maybe try using using either a
non-zero value for the Shaft radius that is bigger than the Tube radius or
use the Cone glyph type instead.

Post by Liang Wang
Hi Andy,
The results are similar if I apply glyph on streamlines directly (see the
attached image).
I guess the difficulty part is that arrow heads are not easily centered on
lines/tubes?

Post by Andy Bauer
Hi,
How does it look if you Glyph the streamlines themselves instead of the
tubes?

Post by Liang Wang
By using the arrow glyph filter on the lines/tubes, the arrows are often
slightly dislocated (and thus slightly misaligned) from the tubes
themselves (see the attached image).
In comparison, I am trying to get images like
http://www.tecplot.com/wp-content/uploads/2016/01/fstream.jpg or
https://i.stack.imgur.com/z8nkm.png
Logically, the arrows could have been an attribute of the
streamlines/stream tubes?
_______________________________________________
Powered by www.kitware.com
Visit other Kitware open-source projects at
http://www.kitware.com/opensource/opensource.html
http://paraview.org/Wiki/ParaView
Search the list archives at: http://markmail.org/search/?q=ParaView
http://public.kitware.com/mailman/listinfo/paraview

Utkarsh Ayachit

2017-03-16 00:12:01 UTC

Try changing the "Glyph Type" to Cone. See attached image.

Post by Andy Bauer
I think it is because you have set the Shaft radius to 0. The start of the
arrow doesn't appear because of this and I'm suspecting that the start of
the arrow is centered along the streamline. Maybe try using using either a
non-zero value for the Shaft radius that is bigger than the Tube radius or
use the Cone glyph type instead.

Post by Andy Bauer
Hi,
How does it look if you Glyph the streamlines themselves instead of the
tubes?

Post by Liang Wang
By using the arrow glyph filter on the lines/tubes, the arrows are often
slightly dislocated (and thus slightly misaligned) from the tubes themselves
(see the attached image).
In comparison, I am trying to get images like
http://www.tecplot.com/wp-content/uploads/2016/01/fstream.jpg or
https://i.stack.imgur.com/z8nkm.png
Logically, the arrows could have been an attribute of the
streamlines/stream tubes?
_______________________________________________
Powered by www.kitware.com
Visit other Kitware open-source projects at
http://www.kitware.com/opensource/opensource.html
http://paraview.org/Wiki/ParaView
Search the list archives at: http://markmail.org/search/?q=ParaView
http://public.kitware.com/mailman/listinfo/paraview

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http://www.kitware.com/opensource/opensource.html
http://paraview.org/Wiki/ParaView
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Utkarsh Ayachit

2017-03-16 00:14:20 UTC

This post might be inappropriate. Click to display it.

Liang Wang

2017-03-16 02:20:09 UTC

Indeed, using Cone glyph gives much better results, and tweaking by
"Stride" is very helpful!

Thank you, Andy and Utkarsh.

On Wed, Mar 15, 2017 at 8:14 PM, Utkarsh Ayachit <

Post by Utkarsh Ayachit
To control spacing of the glyphs, on the Glyph's properties panel you
can change the Glyph Mode to "Every Nth Point" and then tweak the
"Stride".
On Wed, Mar 15, 2017 at 8:12 PM, Utkarsh Ayachit

Post by Utkarsh Ayachit
Try changing the "Glyph Type" to Cone. See attached image.

Post by Andy Bauer
I think it is because you have set the Shaft radius to 0. The start of

the

Post by Andy Bauer
arrow doesn't appear because of this and I'm suspecting that the start

Post by Andy Bauer
the arrow is centered along the streamline. Maybe try using using

either a

Post by Andy Bauer
non-zero value for the Shaft radius that is bigger than the Tube radius

Post by Andy Bauer
use the Cone glyph type instead.

Post by Liang Wang
Hi Andy,
The results are similar if I apply glyph on streamlines directly (see

the

Post by Liang Wang
attached image).
I guess the difficulty part is that arrow heads are not easily

centered on

Post by Liang Wang
lines/tubes?

Post by Andy Bauer
Hi,
How does it look if you Glyph the streamlines themselves instead of

the

Post by Liang Wang

Post by Andy Bauer
tubes?

Post by Liang Wang
By using the arrow glyph filter on the lines/tubes, the arrows are

often

Post by Liang Wang

Post by Liang Wang
slightly dislocated (and thus slightly misaligned) from the tubes

themselves

Post by Liang Wang