On Thu, Mar 5, 2009 at 5:42 PM, Richard Thomas <[email protected]> wrote: > > On Mar 5, 9:10 pm, Tristam MacDonald <[email protected]> wrote: > > On Thu, Mar 5, 2009 at 1:57 PM, Richard Thomas <[email protected]> > wrote: > > > > > I am experiencing a very weird bug. My interpreter keeps segfaulting > > > when I do any serious amount of GL. It almost always happens but not > > > after a consistent amount of time. I have a simple lap timer program I > > > wrote and to keep it from being boring I put a little expanding > > > circles effect in the background. Now if I disable the label that's > > > displaying the time or the circles then it'll run seemingly forever > > > without crashing, if I do both at once it crashes within a minute or > > > so. > > > > > I've exhausted almost every possibility I can think of. I ran memtest > > > for half a dozen passes in cases I had a hardware fault. Pyglet's GL > > > wrapper is simple enough that I can't really see ctypes being the > > > problem or foreign function libraries would be giving up all over the > > > place. Besides which nobody else I've tried has had this problem. > > > > > Is there anyone who's experienced anything like this? > > > > > Sometimes I get a bus error instead of a seg fault. > > > > What Mac hardware are you running? > > If you have the Intel integrated X3100 GPU, present in 2008 MacBooks and > > iMacs, and possibly some Mac Minis, then any attempt to mix immediate > mode > > OpenGL with VBOs can cause both segfaults and bus errors. > > There are a couple of posts on my blog (in signature) related to this > issue. > > Yes, I am using an X3100 GPU on an early 2008 MacBook. The conditions > you describe make sense as labels are VBO based and my circle effect > was immediate mode. However, I am already running 10.5.6. I downloaded > and ran the test from your blog for 10 minutes with no sign of a > problem so this may be another (albeit similar) issue. Sometimes the > traceback is inside a glDrawArray (presumably from pyglets batch > rendering) and sometimes a glVertex2f (my immediate mode rendering). > > I'm not sure I know where to start with whittling out a narrow test > case. Any advice? > > Richard. >
My original test case doesn't seem to cover all the problems, in particular Blender still crashes regularly. I would recommend that you try switching your circle effect over to VBO (i.e. pyglet.graphics.triangle_list) temporarily, and see if the problem still occurs. -- Tristam MacDonald http://swiftcoder.wordpress.com/ --~--~---------~--~----~------------~-------~--~----~ You received this message because you are subscribed to the Google Groups "pyglet-users" group. To post to this group, send email to [email protected] To unsubscribe from this group, send email to [email protected] For more options, visit this group at http://groups.google.com/group/pyglet-users?hl=en -~----------~----~----~----~------~----~------~--~---
