Wii Remote (2006), Wiimote Whiteboard (2007), Kinect (2010), Leap Motion (2010- Ultraleap (2019)), There are infrared depth cameras in various phones and lapto

Wii Remote (2006), Wiimote Whiteboard (2007), Kinect (2010), Leap Motion (2010- Ultraleap (2019)), There are infrared depth cameras in various phones and laptop cameras now. [VR] Motion controllers: https://en.wikipedia.org/wiki/Motion_controller#Gaming https://en.wikipedia.org/wiki/Motion_controller#Gaming Inertial navigation system: https://en.wikipedia.org/wiki/Inertial_navigation_system https://en.wikipedia.org/wiki/Inertial_navigation_system Inertial measurement unit : https://en.wikipedia.org/wiki/Inertial_measurement_unit https://en.wikipedia.org/wiki/Inertial_measurement_unit : > An inertial measurement unit (IMU) is an electronic device that measures and reports a body's specific force, angular rate, and sometimes the orientation of the body, using a combination of accelerometers, gyroscopes, and sometimes magnetometers. When the magnetometer is included, IMUs are referred to as IMMUs.[1] Moasure does displacement estimation with inertial measurement (in a mobile app w/ just accelerometer or also compass sensor data?) IIUC: https://www.moasure.com/ https://www.moasure.com/ /? wireless gesture recognition RSSI: https://scholar.google.com/scholar?q=wireless+gesture+recognition+RSSI&hl=en&as_sdt=0&as_vis=1&oi=scholart https://scholar.google.com/scholar?q=wireless+gesture+recogn... /? wireless gesture recognition RSSI site:github.com : https://www.google.com/search?q=wireless+gesture+recognition+RSSI+site%3Agithub.com https://www.google.com/search?q=wireless+gesture+recognition... Awesome-WiFi-CSI-Sensing > Indoor Localization: https://github.com/Marsrocky/Awesome-WiFi-CSI-Sensing#indoor-localization https://github.com/Marsrocky/Awesome-WiFi-CSI-Sensing#indoor... 3D Scanning > Technology, Applications: https://en.wikipedia.org/wiki/3D_scanning#Technology https://en.wikipedia.org/wiki/3D_scanning#Technology Are there a limited set of possible-path-corresponding diffraction patterns that NIRS (Near-Infrared Spectroscopy) could sense and process to make e.g. a magic pencil with pressure sensitivity, too? /q.hnlog "quantum navigation": https://news.ycombinator.com/item?id=36222625#36250019 https://news.ycombinator.com/item?id=36222625#36250019 : > Quantum navigation maps such signal sources such that inexpensive sensors can achieve something like inertial navigation FWIU? From https://news.ycombinator.com/context?id=36249897 https://news.ycombinator.com/context?id=36249897 : > Can low-cost lasers and Rdyberg atoms e.g. Rydberg Technology solve for [space-based] matter-wave interferometry? [...] Does a fishing lure bobber on the water produce gravitational waves as part of the n-body gravitational wave fluid field, and how separable are the source wave components with e.g. Quantum Fourier Transform/or and other methods? Because the digitizer