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If you are using LP-RESEARCH marker holders for your HMD or hand controller holdeholder, please refer to section LP-RESEARCH Holder Assembly Instructions for assembly information HMD holder and hand controller assembly instructions.

Optionally, in case an external IMU is used for HMD tracking, this IMU needs to be installed inside or on the headset. It needs to be attached to the PC running LPVR via a USB connection.

Please make sure of the following before installing LPVR:

1. Your HMD is connected and powered up

2. Your optical tracking system is connected and powered up

3. (Optional) Your controllers are powered up and paired with your system

4. The LPVR dongle is inserted into a USB plug on your PC

5. Optical markers are attached to your HMD and (optional) hand controllers.

Software

System Requirements

1. LPVR in its current version runs exclusively on Windows, from Windows 10 upwards.

2. SteamVR must be installed and operational. Make sure your SteamVR version is newer than 1.9.16. Please also make sure that you are not using SteamVR 1.16 which has a known bug that will lead to subpar performance. Please refer to this page on how to gain control over SteamVR versions.

3. Currently LPVR natively works with the Advanced Realtime Tracking (ART) optical tracking system.

4. This driver plugs into SteamVR. You will not need any modifications to your Unity, Unreal or other SteamVR application code. Use the standard SteamVR interfaces to support headset tracking.

Driver Installation

In the following section we will describe how to setup LPVR-CAD.

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• In case it shows up, please ignore the request for doing a room setup as shown in the following image.

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• Open the LPVR control panel (Figure 9) by pointing your At the end of the installation, the LPVR configuration page should be opened automatically. Please be sure to bookmark the location, so that you can access it easily. If it didn’t open, please point your web browser to http://localhost:7118/index.html to open it. Please make sure to enter the address exactly as shown here. We have tested the UI on Chrome, Edge and Firefox. Users have reported problems on old (pre-Chromium based) Edge browsers.

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• You can see live log output from SteamVR at this address: http://localhost:27062/console/index.html. Enter lpvr in the filter box to see only message sent by the LPVR driverBelow we show what the configuration page will look like on a newly installed system.

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  The main part of the page contains status visualization and configuration parameters. At the bottom, links to “Expert Mode” (manual configuration by entering configuration parameters in JSON format) and to this documentation are available.

• Adjust tracking system parameterssettings. Make sure the port number is correctly set in DTrack and that its port is accessible in the network from the computer you are installing this driver on.

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NOTE 1: When after changing the configuration parameters always make sure you press the Update driver Apply Stettings button to apply the changes.

NOTE 2: If you prefer the z-axis pointing upwards, set the DTrack coordinate system parameter parameters in DTrack to “Normal” and adjust the room directions in the LPVR tracking system configuration to e.g. the following:

SteamVR always uses Y as up direction, and the DTrack coordinates will be transformed to match this convention on output.

Headset

Adjust HMD tracking parameters. The body ID must be equal to the ID of the tracking marker on the headset in DTrack. Make sure that the rigid body of the tracking marker is aligned in the right way with the HMD. Please see section Adjustment of the HMD rigid body for detail information.

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Go to SteamVR’s Settings. Select the “Startup / Shutdown” pane and then “Manage SteamVR Addons.” In the list, set the slider next to LPVR-CAD to “Off” and restart SteamVR. To reenable it, change the setting back to “On” and restart SteamVR.

System Calibration

Please continue with the calibration instructions.