Comments (9)
I've narrowed this down to Line 540 of qtopengl_widget.cpp
. Commenting out glPolygonMode(GL_FRONT_AND_BACK, GL_LINE)
"fixes" the problem, which seems odd, because it shouldn't affect any matrices (as far as I'm aware).
glxinfo | grep "OpenGL version"
prints OpenGL version string: 3.0 Mesa 17.0.7
.
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Just an update for anyone else running ARGoS using VMWare Fusion:
So far I've only been able to reproduce this issue in Ubuntu VMs (16.04 and 17.10) running on a Mac via VMWare Fusion (10.1.1). It doesn't seem to be an issue with Mesa, as the bug still occurs after upgrading to version 17.3.3, and everything works fine on a native installation of Ubuntu 16.04 running Mesa 17.2.4.
This seems to be something wrong with the VMWare graphics driver - disabling "Accelerate 3D Graphics" in the VM options fixes the problem, and everything works normally in VirtualBox.
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Thanks for the update, that clarifies quite a lot why I can't reproduce the problem on any machine I tried. Should I keep the bug open and mark it as "invalid", meaning that it's not an ARGoS problem?
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Yes, I would mark it as invalid. This doesn't seem to be a bug in ARGoS - the line glPolygonMode(GL_FRONT_AND_BACK, GL_LINE)
should have no side-effects, and only seems to cause problems with VMWare Fusion.
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Also, if I remove that line the entire arena becomes a black box...
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Sorry, what I meant by commenting out the line "fixing" the problem is that the bounding box doesn't float around anymore, but it will be rendered as a solid block - the same as using glPolygonMode(GL_FRONT_AND_BACK, GL_FILL)
instead.
I tried printing out the coordinates of sBBox
, and they're definitely correct - it's just a rendering issue. I haven't been able to reproduce the problem by creating a minimal working example in a separate OpenGL application though, so I wonder if there is something strange going on inside ARGoS that is tolerated by most OpenGL implementations, but not the one used by VMWare Fusion.
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That is really weird. I don't know what could be the cause, and unfortunately I don't have much time right now to look into the bug :( If you could have a look into that it would be awesome. Otherwise, as soon as I have some time, I'll try and reproduce it.
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I raised this issue on the VMware Fusion forums, and apparently VMware VMs only support the OpenGL 3.3 Core Profile (see here: https://communities.vmware.com/message/2743723). Given that ARGoS is using the deprecated fixed pipeline rendering method that @allsey87 mentioned in #40, which was phased out as of OpenGL 3.1, I don't think we can expect the visualisation plugin to work properly in VMware VMs (although this may only be a problem with VMware Fusion - I haven't tested it with a Windows/Linux host).
This seems like another reason to look into replacing the current visualisation plugin with a modern alternative, unfortunately.
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This seems like another reason to look into replacing the current visualisation plugin with a modern alternative, unfortunately.
I agree, but before the summer I won't be able to do it. I tried asking students to do it, but they mostly got scared and dropped the ball :/
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