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Make sure the LPVR-DUO driver is correctly installed as described in the Setup Instructions.
The calibration of LPVR-DUO consists of 2 parts:
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If you would like to not go through the manual body calibration process, we provide a number of premade body calibration files for download on this page. These files have been calibrated using our automatic calibration algorithm and are a very close approximation of an ideal configuration.
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In the standard OpenVR coordinate system, the Z axis points “inside” the user’s head, the X-axis to the right and the Y-axis upwards. For a VIVE Pro LPVR setup this could similar to the following photos.
Example marker arrangement, front view. Two markers (for each axis) defining a horizontal line parallel to the X (red) and Y-axis (green) of the HMD will make it easier to adjust the rigid body coordinate system in the optical tracking software. | Example marker arrangement, top view. |
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As a first step in aligning the rigid body in ART, adjust the view so that you can visually assign marker balls on the HMD to markers detected by the ART body calibration.
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In the second step, use the Body position and Body orientation fields to correct the orientation of the rigid body’s coordinate system. The figure shows a correctly aligned body origin, front view opposite to the Z-axis. Note that the relative position of the coordinate origin should be ~3cm below the origin of the marker holder. It is assumed to lie in the center between the user's eyes, on the nose bridge.
Correctly aligned body origin, side view along X-axis. | Correctly aligned body origin, top view along Y-axis. |
The system should work now for tracking the HMD within the optical tracking volume. In case you notice a slight misalignment of your head orientation and the orientation of the floor, or the floor is not horizontal, please make some small adjustments to the alignment of your HMD rigid body in the body alignment editor of the optical tracking system. In our experience, sometimes a few degrees adjustment of the Z-axis helps to make the orientation result feel perfectly natural.
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Adjustment of Vehicle Fixed IMU
Pre-defined Orientation
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Calibration Procedure
Follow this tutorial to install and run the vehicle-fixed LPMS-IG1 IMU.
In a first step the orientation of the internal coordinate system of the vehicle fixed IMU and the optical tracking system needs to be defined. For this purpose, attach an optical marker to the enclosure of the IMU and create a new rigid body in the optical tracking software.
To activate the calibration features of LPVR, click on Show Additional Features on the LPVR configuration page.
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