3 ms·

Adjusting IPD is really annoying at times. Probably one of the main reasons I pushed for auto IPD in our feature set.

by kanetw 4y ago

moron4hire 4y ago
I had a huge struggle debugging an issue on HoloLens that turned out to just be mis-calibrated IPD. Unbeknownst to myself, a coworker had ran the calibration on himself the night before and when I got the device back, suddenly all my graphics of 3D models overlapping real-world objects looked "wrong". Every time I tried to visually adjust the registration of the model to the object, it would be completely unaligned in the z-axis with respect to my view when I performed the alignment. Midway through debugging, I tried adjusting from multiple angles to get the model absolutely centered on the object, which then made it look like it was swimming in the air whenever I walked around it. I started to think there was something wrong with the device tracking, so I went through every calibration process on the device. I left IPD for last because I was used to working in VR where it doesn't really matter all that much, so I didn't expect it to be that important. IPD calibration on the original HoloLens was also a gigantic pain in the ass, as it took well over a full minute if clicking on objects with that interminable "air tap". Suddenly everything locked into place and was rock solid. Immediately bought IPD measuring tools, had my own measurements confirmed by my optometrist, and it's now the first thing I check on every new headset. Every auto calibration system I've used regularly gets my IPD be wrong by +-5mm. I don't know if that's a significant difference (it's almost 10%, so seems like it), but I don't take any chances anymore.
- kanetw 4y ago
  Not sure how other headsets do IPD, but with eye tracking it's pretty hard to get it wrong. If the eye's off center it's easily noticeable in the image.

3 ms·

Adjusting IPD is really annoying at times. Probably one of the main reasons I pushed for auto IPD in our feature set.

by kanetw 4y ago

Adjusting IPD is really annoying at times. Probably one of the main reasons I pushed for auto IPD in our feature set.

moron4hire 4y ago
I had a huge struggle debugging an issue on HoloLens that turned out to just be mis-calibrated IPD. Unbeknownst to myself, a coworker had ran the calibration on himself the night before and when I got the device back, suddenly all my graphics of 3D models overlapping real-world objects looked "wrong". Every time I tried to visually adjust the registration of the model to the object, it would be completely unaligned in the z-axis with respect to my view when I performed the alignment. Midway through debugging, I tried adjusting from multiple angles to get the model absolutely centered on the object, which then made it look like it was swimming in the air whenever I walked around it. I started to think there was something wrong with the device tracking, so I went through every calibration process on the device. I left IPD for last because I was used to working in VR where it doesn't really matter all that much, so I didn't expect it to be that important. IPD calibration on the original HoloLens was also a gigantic pain in the ass, as it took well over a full minute if clicking on objects with that interminable "air tap". Suddenly everything locked into place and was rock solid. Immediately bought IPD measuring tools, had my own measurements confirmed by my optometrist, and it's now the first thing I check on every new headset. Every auto calibration system I've used regularly gets my IPD be wrong by +-5mm. I don't know if that's a significant difference (it's almost 10%, so seems like it), but I don't take any chances anymore.
- kanetw 4y ago
  Not sure how other headsets do IPD, but with eye tracking it's pretty hard to get it wrong. If the eye's off center it's easily noticeable in the image.