Wound up making the trigger-definition code capable of building nested trees of objects, rather than a simple list. It was a fairly straightforward refactoring of the list-handling code. Still haven't figured out how to make the pattern reusable for other projects. Not a high priority just yet.

Should get the hard disk tomorrow to stop the system crashing when it runs out of disk space. Company decided to spring for an upgraded video card too, so may wind up able to program the wrappers for OpenGL extensions soon.