Author archives: Mike

Want to get rid of a CD around the house (who uses CDs any more)?  Pop it into your drive, open it with Dolphin, browse to the 'MP3' (or 'Ogg Vorbis') folder and copy the files to your media directory.  The KDE IO system automatically generates (rips) the "files" when the copying process goes to ...

Started really looking at the results from Coldshot and realized that the line timings just didn't add up to the function timings... because the line-timings were "localtime" rather than "cumtime".  Local time is actually pretty interesting as a piece of information, but I'm guessing 95% of the time you actually want cumtime when you are ...

Been playing with my experimental profiler (Coldshot) all day.

At this point it can load an OpenGLContext run with 207MB of trace data and produce a basic textual summary (both cProfile-style calls/timing and file:line level timings) in around 4s.  That's still quite slow, as the profiler records around 4MB/second of data, so multi-GB traces seems ...

The Pycon.ca schedule is up.  My talk is at 11:20 on Saturday.  It is a revised/extended/updated version of my PyCon 2009 talk on Profiling.

So as part of my little Quake 3 BSP loader (twitch) I need to render Quadratic Bezier Spline patches.  I want to do the whole thing from a VBO, so I'm doing the tessellation manually (I also wanted to do it to play).  The basic rendering is now working, that is, I can render a ...

PyOpenGL 3.0.2 (final, finally) has been released. The major changes since 3.0.1 (released in 2010!) are:

• OpenGL core support up to 4.3 level [1]


• OpenGL extension support from the current registry [1]


• Some missing FreeGLUT extensions added


• OpenGL.GL.framebufferobjects providing ARB/EXT alternates for framebuffer operations


• Experimental OSMesa (Offscreen Mesa) context (use the environment variable PYOPENGL_PLATFORM=osmesa)

Codebase ...

If you're wanting to speak at Pycon.ca you need to get your proposals in this weekend.  Don't delay.

[Update] Yeah, Mike, do that.  I now have way too many talks I'd like to do:

• Modern OpenGL Eat Your Vertices Raw (submitted)
• Profiling for Performance (submitted, but very brief outline)
• Using GStreamer 1.0 (an HTML5 Video ...

Pulse, when installed, will unconditionally overwrite your carefully crafted .asoundrc settings that, for instance, use an environment variable to choose the ALSA device on which to output.  This is one of those things that everything tells you "is good", without telling you how it happens, or how to stop it.  Long story short, the offending ...

If you have PyOpenGL dependent code, now would be the time to check that it runs against the latest beta.  Assuming no show-stopping bugs are reported this will be the last beta before 3.0.2 final is released.  Available in PyPI now.

So you have an "embeddded" Django instance where you want to strip the thing down to the minimum required files.  You run compileall on your site-packages, then strip/delete all of the .py files... and your Django becomes pretty useless, because it no longer recognizes any of your management plugins (not even the built-in ones).

This ...