[Paraview-developers] FW: [EXTERNAL] [Paraview] Rendering problem with the Streamline Representation plugin

[Scott, W Alan]

I played around with this plugin/filter a bit this morning, and am pretty confused.  Let's start with a question - what does this plugin do?

Lets start with my observations.

I loaded the plugin, and then tested with Wavelet/ Gradient filter/ Stream Lines.

Streamlines are green.  Color can't be changed.  Is this a bug, or by design?
Streamlines default to really, really small.
As I toggled the orientation axis on and off, the streamlines grew.   Huh?  Is this a bug, or by design?
I tried Dave's Small CTH dataset, then Resample to Image, then Gradient.  This crashed.  This shouldn't crash, should it?


Thanks for any insight,

Alan

From: ParaView [mailto:paraview-bounces at paraview.org] On Behalf Of Wilhelm Lionel
Sent: Tuesday, September 12, 2017 8:19 AM
To: Paraview at paraview.org
Subject: [EXTERNAL] [Paraview] Rendering problem with the Streamline Representation plugin


Dear Paraviewers,



I found sevral rendering issues in the Streamline Representation plugin. In order the issue to be reproducible, I followed the "How to test ?" section on this page https://blog.kitware.com/new-animated-stream-lines-representation-for-paraview-5-3/. In order to see what I'm talking about, one can open Paraview (GUI) tools -> Python Shell -> run script -> PVstateSurfRepBug.py (I load the plugin in the script)



1. The streamlines appear in green as default color. If I try to set their color to white in the GUI it does not work (Gradient proxy -> Coloring -> edit color map). The user must first set the color as some other preset and then the GUI sets the DiffuseColor attribute to whatever the user choose.

2. In addition to the gradient filter, if a slice filter is attached to the wavelet source, even if the streamlines should be displayed (because the slice plane is behind the streamlines) they do always show. If the representation type of the slice is Point Gaussian, Surface or Surface with edges, they do not show but the other representation types work well

3. If I want to record an animation of the streamlines, the "Transparent Background" option leads to strange animation (with AVI format but not with OGG/Theora).



Despite these little bugs, I'd like to thank the developpers for this awsome plugin !! It realy helps to understand and interpret CFD results :)



Kindly,



Lionel Wilhelm
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