optic flow / stickyDot display code?

[bernie]

I'd like to create a simple optic flow stimulus in vizard (e.g., white dots on black background) when the observer is moving - is there a sample script to do that? I used a sticky dot display in vizard several years ago (in 2005, it worked fine) but cannot seem to find the right piece of code any more, and the links on the worldviz site seem to have disappeared... (it was called something like stickydot.dls or .py I think)

Thanks!
Bernie