Someone built the IDE for the PI: openmv-ide/README.md at master · openmv/openmv-ide · GitHub
…
As for modifying the code start here: Home · openmv/openmv Wiki · GitHub
…
Um, outputting the 4 corners of the AprilTag is a legit feature request. I can add that. Just one question, what’s the use case? I avoided outputting this info because its somewhat complex to use.