[Paraview] ParaView 5.x not showing all objects available in Pipeline Browser

Tue Jan 16 10:31:53 EST 2018

Omid,

The only other thing I can think of is that there is something odd about the OpenGL driver/hardware on your system that for some reason is not supporting the coincident topology resolution in ParaView. ParaView changed its rendering system from OpenGL 1.3 to OpenGL 3.1 in version 5, the version that you report seeing the issue.

Once again, I recommend trying to run ParaView on a completely different computer if you can find access to one. You might also try updating the OpenGL drivers on your computer. Beyond that, I am out of ideas.

-Ken

From: Omid Mahabadi <omid.mahabadi at geomechanica.com>
Date: Tuesday, January 16, 2018 at 7:58 AM
To: "Moreland, Kenneth" <kmorel at sandia.gov>
Cc: "paraview at paraview.org" <paraview at paraview.org>
Subject: [EXTERNAL] Re: [Paraview] ParaView 5.x not showing all objects available in Pipeline Browser

Hi Ken,
Thanks for your feedback and sorry for my late reply. Somehow I didn't get this message and only found your reply after searching in my mailbox.

I tried various values for the Z Shift, increasing it by one order of magnitude until reaching a value of 200, restarting in between changes. This didn't help.

I haven't really made any other changes in ParaView settings. I even restored to defaults a couple of times. I've been using Linux Mint 17 and have also experienced the same issue on Ubuntu 14.04 both 64 bit.

Thanks

Best regards,
Omid

On Wed, Jan 10, 2018 at 12:45 PM, Moreland, Kenneth <kmorel at sandia.gov<mailto:kmorel at sandia.gov>> wrote:
Omid,

Even after applying the Threshold filter, I cannot replicate your problem. I’ve tried on both ParaView 5.2 and 5.4. Both work fine for me.

My settings are the default. “Resolve Coincident Topology” is set to “Shift z-buffer when rendering lines and points”. “Z Shift” is set to 0.002. (Polygon offset should not matter in this mode.) You could try increasing the Z Shift to fix the problem. Note that you have to restart ParaView in order for these options to take effect.

It is possible that there is some quirk with the rendering system on your computer that does not implement the topology resolution. Do you happen to have another computer on which you can try to run this? I also noted that if I turn on OSPRay rendering, I do get the missing line issue you describe. There might be other display/rendering parameters that cause issues. But the defaults should be fine, so unless you have done some tinkering you should be OK.

-Ken

From: Omid Mahabadi [mailto:omid.mahabadi at geomechanica.com<mailto:omid.mahabadi at geomechanica.com>]
Sent: Wednesday, January 10, 2018 9:21 AM
To: Moreland, Kenneth <kmorel at sandia.gov<mailto:kmorel at sandia.gov>>
Cc: paraview at paraview.org<mailto:paraview at paraview.org>
Subject: [EXTERNAL] Re: [Paraview] ParaView 5.x not showing all objects available in Pipeline Browser

Hi Ken,
Thanks for the detailed reply. I could not get anything out of the settings dialog as per your suggestion. Did you have a combination of those settings that might work for my files?
I can also see the image you sent; that's usually fine. However, I typically apply a Threshold filter to the _basic_ files (Scalar: alive; min: 0.1; max: 1). In this case, the _basic_ object is always drawn in front of the _broken_joint_ object.
In addition, I visualize dozens of these files every day so Transforming every single object is a bit tedious.
Thank you,
Omid

On Mon, Jan 8, 2018 at 5:56 PM, Moreland, Kenneth <kmorel at sandia.gov<mailto:kmorel at sandia.gov>> wrote:
Omid,

I am unable to replicate your issue in ParaView 5.4.1. When I loaded your data and showed the broken_joint data in wireframe, I was clearly able to see the lines of broken_joint over the polygons of basic. (See the attached image.)

The problem you are getting is likely caused by z-buffer fighting in the rendering. This happens when two objects are the exact same distance from the viewer, as I believe is the case in your data. Wanting to draw lines on top of polygons is common enough that there are some corrections to help the rendering determine what to draw in front. Perhaps by changing the settings on resolving coincident topology will resolve your issue. You can find them by opening the ParaView settings dialog (Edit → Settings), clicking on the Render View tab, and turning on the advanced options. The options you are looking for are “Resolve Coincident Topology,” “Polygon Offset Parameters”, and “Z Shift.”

Another, possibly easier, solution it to simply move the lines of the broken_joint data closer to the camera. Click the broken_joint object and add the Transform filter. Change the Translate parameter to 0, 0, 1 and apply. That should shift the wireframe forward enough to see it properly.

-Ken

From: ParaView [mailto:paraview-bounces at paraview.org<mailto:paraview-bounces at paraview.org>] On Behalf Of Omid Mahabadi
Sent: Monday, January 8, 2018 2:30 PM
To: paraview at paraview.org<mailto:paraview at paraview.org>
Subject: [EXTERNAL] [Paraview] ParaView 5.x not showing all objects available in Pipeline Browser

Hi,
I use ParaView to visualize data of our simulations using the Unstructured Grid data format. Up until ParaView 4.x everything worked fine: we typically visualize one set of data files as Surfaces and another as Wireframe. The Wireframe dataset refers to "fracture lines" in our simulations.
See below how the simulation looked like in PV version 4.x. You could clearly see the line around the boundaries of the model.

[nline image 1]
However, in PV 5.x the lines are not fully visualized as if they're hidden below the other data object:

[nline image 2]
I've tried a few versions of 5.x but they all behave similarly.
Does anyone know what might be going on here? Is this a bug / removed featured from the new version or should I do something different with 5.x? I've noticed that this issue does not happen consistently. I've seen the issue on both Linux Mint 17.3 (64 bit) and Ubuntu
I've attached two example VTU files. Please visualize the second file as Wireframe (_broken_joint). Below are two large VTU files.
https://www.dropbox.com/s/kzt4jq1wbwfua4j/out.zip?dl=0

Can someone else reproduce this issue?

I'd really hope to start using ParaView 5 since it finally has the long-missing Reload Files options!
Thank you,
Omid

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