Althought much time has passed...
Just for the record, I was never able to hand-roll a version of reset intersense that works (e.g. using the code above did not work). What did work was reading the comments in viztracker.py. It told me that I can reset using alt-r. (Well, technically it told me to use alt-R. That did not work. Luckily I perservered and guessed that there was a typo in which alt-R appeared where alt-r should have (see like 9 of viztracker.py) I am 75% sure I reported to
support@worldviz.com. That was way back around version 3.140052 or so. I wonder if that typo has been fixed in the latest version? (-:
This evening, I've got some professional VR coder help trying to help me with rolling my own vesion of reset but so far we are unsuccessful, still forced to rely on alt-r. That's served us well for the past few months but (long story) we can't use alt-r anymore.