Razer recently launched its Open Source VR intiative, complete with a virtual reality headset to get more developers into the VR game. The initial launch notably lacked Android support and positional tracking hardware, but it’s now filed those holes with its latest OSVR Hacker Development Kit (HDK) 1.2. The IR system is included in the kit price, including the 100Mhz IR LED system and a camera that provides 360 degrees of position tracking. Previously, Razer included IR position tracking designs and templates, but didn’t supply the hardware.
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https://www.engadget.com/2015/06/16/razer-osvr-ir-tracking-android/