OpenGL feedback makes application freeze, picking doesn't work.

[egasimus]

VirtualBox 2.2.0 closed source here, running Windows XP hosted on Ubuntu Intrepid. I'm developing an OpenGL application which relies heavily on GL_SELECT and GL_FEEDBACK render modes. However, neither seems to work for me. On leaving GL_SELECT, glRenderMode always returns -1 hits, and GL_FEEDBACK outright freezes the program. I thought it was me who was doing something wrong, but then I ran my program in Wine, and it worked like a charm. What could be done to fix this issue?

[Leonid Lobachev]

Going to close unless you provide more info.

Just checked and feedback/select works as expected in testcases here.

Apart from that, make sure you have 2.2.0 additions installed. Also checking things under Wine isn't a good way to prove something is working, check in real OS. Check glGetError results after every gl call you make, try to extract the failing testcase from your closed source.

[Chunky Kibbles]

I'm getting problems with GL_SELECT too. The windows binary works fine if I disable hardware 3d acceleration, and under wine, but not if I have hardware 3d acceleration enabled.

I'm using 32-bit XP Pro SP3 in the VM VirtualBox is, at time of writing, the most recent version in the VirtualBox repository for my ubuntu distribution, 32-bit 9.04: 2.2.4 r47978. I'm using a quad-core Xeon [email protected] The system has 4G of RAM.

My code looks like this where it checks for hits:

GLint hits = glRenderMode(GL_RENDER);
GLenum err = glGetError();
if(GL_NO_ERROR != err) {
   printf("Error %i: %s\n", err, gluErrorString(err));
}
printf("hits=%i\n");

In all three: wine, vm +hardware accel, vm -hardware accel, I get no error. In wine and vm -hardware accel, I get a number of hits. In vm +hardware accel, I get hits=0

It's worth noting that it works if I reboot into windows, also.

Unfortunately, I can't release my code or binaries. On the other hand, the best simplest example of using GL_SELECT is in the redbook, select.c ​http://opengl-redbook.com/code/OpenGL-1.4.tgz

[Leonid Lobachev]

The point is that redbook sample as well as couple of other samples works just like expected here. For ex, here's an output from the guest vm: hits = 2

number of names for hit = 1

z1 is 0.999999; z2 is 0.999999

the name is 1

number of names for hit = 1

z1 is 0.2; z2 is 1.8

the name is 3

Please try to extract some failing testcase from your source which you could share as a binary or source.

[Leonid Lobachev]

Also please check host log and run your app on the guest with CR_DEBUG_FILE set to c:\log.txt and check for errors there as well.

[Jesse]

I have exactly the same problem!

[Jesse]

Is anybody still looking at this? I can give some information if needed.

Jesse

[Leonid Lobachev]

Nope...because as I wrote few comments above, simple samples work just like expected. And I need atleast a log file of failures.