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Using a Template File to Create Vive Pro Active Clip Rigid Body


Version Note

Motive 2.1.2, or above, users can use the Builder pane to quickly make the rigid body. Below instructions are intended for users who are using Motive 2.1.1 or below.

Step 1: Make sure the active markers are tracking

First of all, both the system and Motive should already be calibrated and configured for tracking active markers at this point. If not, please read through the Active Marker Tracking page and set up the tracking volume.

ViveClip Markers NoRB.png

Step 2: Download and import the rigid body definition for Vive Pro clip

Download template rigid body definition from the following page (Vive_Pro.motive): download link.

Step 3: Import the template file onto Motive

Import the downloaded MOTIVE file into Motive. You can either click Open under the File tab or drag-and-drop the file directly onto Motive. Once it's loaded, the template rigid body definition will be listed under the Assets pane as Vive Pro, and you should see the rigid body getting tracked over the HMD markers in Motive.

ViveClip Tracked.png

Step 4: Configure the Active IDs in rigid body properties to match the markers on the clip

Next step is to modify the properties of the imported rigid body definition so that it tracks only active markers with matching IDs. To do so, you will need to check active IDs from your HMD clip and input them into the properties of Vive Pro rigid body.

  1. [Motive → Perspective View] Make sure viewing of marker labels is enabled in the perspective view. To do so, click on the visual aids icon Viewport16.png and check mark Marker Labels.
  2. [Motive → Perspective View] Select all of the 8 active markers. It will show the active IDs for each selected marker.
  3. [Motive → Properties] While the Vive Pro rigid body is selected in the Assets pane, open the Properties pane to view its properties.
  4. [Motive → Properties] At the bottom, information about the markers in rigid body definition will be listed. Go through each marker and input the matching active IDs as monitored in the perspective view. It's important that all markers get assigned with correct active IDs; otherwise, the rigid body will not track.
  • Rigid body marker properties before specifying the active IDs. All IDs in the template is set to 0 for tracking any marker IDs.
  • Rigid body marker properties after inputing matching Active IDs. Once this is set, the rigid body will track on reconstructions with matching Active IDs only.

Step 5: Refine rigid body definition

Using the RigidBody Refinement tool for improving asset definitions.

The last step is to refine the template rigid body definition so that it matches exactly how the markers are placed on your Vive Pro clip. Please follow the below steps so that the positions of all 8 markers get calibrated precisely.

  1. Under View tab, open the Builder pane.
  2. Select the Rigid Bodies option at the bottom of the pane and go to the Edit tab.
  3. In Live mode, select the Vive Pro rigid body asset that you wish to refine.
  4. Hold the selected rigid body at the center of the capture volume so that as many cameras as possible can clearly capture the markers on the rigid body.
  5. Press Start Refine in the Builder pane and the
  6. Slowly rotate the rigid body to collect samples at different orientations.
  7. Once all necessary samples are collected, the refinement results will be displayed.
  8. Click Apply.