I have tried this as well - it was definitely not as simple as taking the double integral.
Right. RoomScan requires you to stop and touch the device to the wall frequently. This allows them to re-zero the velocity. Small IC accelerometers and gyros aren't good enough for dead-reckoning over any substantial distance.
What you really want is 3D SLAM, using the cameras. That's been done on Apple devices, for a rather lame "Ball Invasion" game. That team was acquired by Facebook for their VR effort.
There's source code for SLAM. See "slam6d.sourceforge.net". This is the right way to do indoor localization. The better robot vacuums (Neato and Dyson) use it.
Right. RoomScan requires you to stop and touch the device to the wall frequently. This allows them to re-zero the velocity. Small IC accelerometers and gyros aren't good enough for dead-reckoning over any substantial distance.
What you really want is 3D SLAM, using the cameras. That's been done on Apple devices, for a rather lame "Ball Invasion" game. That team was acquired by Facebook for their VR effort.
There's source code for SLAM. See "slam6d.sourceforge.net". This is the right way to do indoor localization. The better robot vacuums (Neato and Dyson) use it.