Okay, here's an improved version.
- Front panel is more intuitive
- VI works with default values
- no longer runs at full blast (which means less points are plotted)
- distance calculation is time-based
I made an some options for it to be controlled via Joysticks, but I haven't implemented that yet. (The appropriate VIs are in the HID pallette. Make sure you're targeted to your computer; Human Interface Device drivers aren't available for the cRIO, and so that palette will be hidden.)
EDIT:
It's still not impeccably documented, but it should be clear what each section does, if not why it works.