Category archives: Snaking

The vbo module in PyOpenGL is currently making a bad assumption, namely that the value passed to gl*Vertex functions should be 0, it could be any integer to indicate an offset.  I'm thinking of creating a class which can be used to create offsets into the vbo which will always just be the offset:

glVertexPointerd( ...

OpenGL.org (Khronos) has made the OpenGL 2.1 docbook source files available, so the PyOpenGL 3.x documentation can now cover up to OpenGL 2.1 (and when 3.0 docs are out adding that should be relatively trivial).  I've also updated the OpenGLContext shaderobject test/demo to use a new feature in OpenGL.extensions which allows you to create functions ...

Reminder for everyone in Toronto that PyGTA is tomorrow evening @7pm down at Linux Caffe.  We'll be going over the Python 3.0 release changes and discussing people's experiences and/or plans with converting code to 3.0 (or even 2.6).

I've just uploaded PyOpenGL 3.0.0b6 to SourceForge and PyPI.  At this point there's not really much I'm intending to change before the 3.0.0 final release.  We now have support for extensions up to the OpenGL 3.0 release, we should run on Win32 and Linux at least.  We should be compatible with py2exe/pyinstaller/py2app.

From here on ...

Got PyOpenGL working on both Ubuntu and Win32 again for basically everything.  Cleaned up the baseplatform module to reduce the code duplication in there.  Updated the extensions included to OpenGL 3.0.  Added in a contributed demo in the demos package.

Will see if I can get a few hours to do a release over the ...

I've finally begun the process of switching to a modern VCS for PyOpenGL.  I've requested imports of PyOpenGL, PyVRML97 and OpenGLContext into LaunchPad.  Hopefully that will be a reasonably fast process.  The final straw was checking out the code on Win32 and realizing just how many pointless directories are created (there were a few import ...

Just checked in changes to PyOpenGL to strip out the use of pkg_resources.  That should avoid the problems we've been seeing where packaging utilities and the like can't handle the entry-point registrations.  Still need to work out something to avoid speculatively loading e.g. numpy.

Tried to get the gdb-with-python recipe (that we discussed at PyGTA) to investigate the crashes from the rewrite.  I gather it requires that you have debugging symbols built for Python and all of the modules for it (well, to be able to trace into them, anyway).  I'm on an Ubuntu box here, not really sure ...

Have had to shelve the changes for PyOpenGL to use the pyglet generator for the core code.  Wound up getting extremely hard-to-debug errors which appeared to be due to corruption of object's GC structures (possibly due to GIL-holding issues) when I switched to a Linux 32-bit platform (instead of 64-bit).

I don't want to hold ...

Been debugging a weird error in GLUT this evening.  Basically if you went into OpenGLContext and used a right-mouse-click-and-drag to rotate around the center-of-view, there would, every once in a while, be a seg-fault.  It didn't happen if you rotated a bit more slowly, or you turned on full logging to see what's going on, ...