JSR-231 buildnight problem

OpenGL Development JOGL Development
#1

Hello,

I’ve got a strange problem with the today buildnight of JSR-231. It’s about VBO.
I made some code to display some big triangulatedSurface, using VBO and index.
It’s work perfectly on JOGL, and I port it under JSR. I’ve got a strange problem: in some case, the display crash.
It’s crashing in glDrawElements, but not all the time. I suppose it’s crashing when I used big vertex pointer/indices.
My surface is composed of 230961 vertices and 460000 triangles.

Any idea?

#2

I have made some test, and the problem seems to be in the VBO, when you put the indices inside in graphic memory…
any idea Ken?

#3

Are you porting from net.java.games.jogl to javax.media.opengl ?

if yes, try a buffer.rewind() since it’s position is now sgnificant (see the migration guide for more details)
otherwise, please ignore and wait for ken :slight_smile:

#4

I think zero’s suggestion is probably correct. We definitely need to add error checking to avoid these kinds of crashes and will do so as soon as possible.

#5

Unfortunately, this is not a rewind problem. I do all the necessery rewind. And also, my data are mapper using the glMapBufferARB function and unmap when I finish my edition.
It’s work perfectly if I don’t use VBO for indices…

#6

Have you tried installing the DebugGL pipeline? That may find OpenGL-related errors earlier which are leading to the crash.

Can you create a small test case out of your program demonstrating the problem? If so, could you file a bug with the JOGL Issue Tracker?