This page covers basic types of trackable assets in Motive. The assets in Motive are used for both tracking of the objects and labeling of 3D markers in Motive, and they are managed under the Assets pane which can be opened by clicking on the icon. Each type of asset is further explained in the related pages.
Once Motive is prepared, the next step is to place markers on the subject and create corresponding assets. There are three different types of assets in Motive:
Marker Set
Rigid Body
Skeleton
For each Take, involved assets are displayed in the Assets pane, and the related properties show up at the Properties pane when an asset is selected within Motive.
The Marker Set is a list of marker labels that are used to annotate reconstructed markers. Marker Sets should only be used in situations where it is not possible to define a Rigid Body or Skeleton. In this case, the user will manually label markers in post-processing. When doing so, having a defined set of labels (Marker Set) makes this process much easier. Marker Sets within a Take will be listed in the Labels pane, and each label can be assigned through the Labeling process.
Rigid body and Skeleton assets are the Tracking Models. Rigid bodies are created for tracking rigid objects, and Skeleton assets are created for tracking human motions. These assets automatically apply a set of predefined labels to reconstructed trajectories using Motive's tracking and labeling algorithms, and Motive uses the labeled markers to calculate the position and orientation of the Rigid Body or Skeleton Segment. Both Rigid Body and Skeleton tracking data can be sent to other pipelines (e.g. animations and biomechanics) for extended applications. If new Skeletons or Rigid Bodies are created during post-processing, the take will need to be reconstructed and auto-labeled in order to apply the changes to the 3D data.
Assets may be created during both Live (before capture) or Post (after capture, from a loaded TAK) captures.
The Assets pane lists out all assets that are available in the current capture. You can easily copy these assets onto other recorded Take(s) or to the live capture by doing the following:
Copying Assets to a Recorded _Take_
In order to copy and paste assets onto another Take, right-click on the desired Take to bring up the context menu and choose Copy Assets to Takes. This will bring up a dialog window for selecting which assets to move.
Copying Assets to Multiple Recorded _Take(s)_
If you wish to copy assets to multiple Takes, select multiple takes from the Data pane until the desired takes are all highlighted. Repeat the steps you took above for copying a single Take by right-clicking on any of the selected Takes. This should copy the assets you selected to all the selected Takes in the Data pane.
Copying Assets from a Recorded _Take_** to the Live Capture**
If you have a list of assets in a Take that you wish to import into the live capture, you can simply do this by right-clicking on the desired assets on the Assets pane, and selecting Copy Assets to Live.
For selecting multiple items, use Shift-click or Ctrl-click.
Assets can be exported into Motive user profile (.MOTIVE) file if it needs to be re-imported. The user profile is a text-readable file that can contain various configuration settings in Motive; including the asset definitions.
When the asset definition(s) is exported to a MOTIVE user profile, it stores marker arrangements calibrated in each asset, and they can be imported into different takes without creating a new one in Motive. Note that these files specifically store the spatial relationship of each marker, and therefore, only the identical marker arrangements will be recognized and defined with the imported asset.
To export the assets, go to Files tab → Export Assets to export all of the assets in the Live-mode or in the current TAK file. You can also use Files tab → Export Profile to export other software settings including the assets.
This page provides instructions on how to utilize the Gizmo tool for modifying asset definitions (Rigid Bodies and Skeletons) on the 3D Perspective View of Motive
Edit Mode: As of Motive 3.0, asset editing can only be performed in Edit mode
Solved Data: In order to edit asset definitions from a recorded Take, corresponding Solved Data must be removed before making the edit, and then recalculated.
The gizmo tools allow users to make modifications on reconstructed 3D markers, Rigid Bodies, or Skeletons for both real-time and post-processing of tracking data. This page provides instructions on how to utilize the gizmo tools.
Using the gizmo tools from the perspective view options to easily modify the position and orientation of Rigid Body pivot points. You can translate and rotate Rigid Body pivot, assign pivot to a specific marker, and/or assign pivot to a mid-point among selected markers.
Select Tool (Hotkey: Q): Select tool for normal operations.
Translate Tool (Hotkey: W): Translate tool for moving the Rigid Body pivot point.
Rotate Tool (Hotkey: E): Rotate tool for reorienting the Rigid Body coordinate axis.
Scale Tool (Hotkey: R): Scale tool for resizing the Rigid Body pivot point.
Precise Position/Orientation: When translating or rotating the Rigid Body, you can CTRL + select a 3D reconstruction from the scene to precisely position the pivot point, or align a coordinate axis, directly on, or towards, the selected marker. Multiple reconstructions can be also be selected and their geometrical center (midpoint) will be used as the target reference.
Please note that the following tutorial videos were created in an older version of Motive. The workflow in 3.0 is slightly different and only requires you to select Translate, Rotate, or Scale from the 3D Viewport Toolbar selection dropdown to begin manipulating your Asset.
You can utilize the gizmo tools to modify skeleton bone lengths, joint orientations, or scale the spacing of the markers. Translating and rotating the skeleton assets will change how skeleton bone is positioned and oriented with respect to the tracked markers, and thus, any changes in the skeleton definition will affect the realistic representation of the human movement.
The scale tool modifies the size of selected skeleton segments.
The gizmo tools can also be used to edit positions of reconstructed markers.In order to do this, you must be working reconstructed 3D data in post-processing. In live-tracking or 2D mode doing live-reconstruction, marker positions are reconstructed frame-by-frame and it cannot be modified. The Edit Assets must be disabled to do this (Hotkey: T).
Translate
Using the translate tool, 3D positions of reconstructed markers can be modified. Simply click on the markers, turn on the translate tool (Hotkey: W), and move the markers.
Rotate
Using the rotate tool, 3D positions of a group of markers can be rotated at its center. Simply select a group of markers, turn on the rotate tool (Hotkey: E), and rotate them.\
Scale
Using the scale tool, 3D spacing of a group of makers can be scaled. Simply select a group of markers, turn on the scale tool (Hotkey: R) and scale their spacing.
Cameras can be modified using the gizmo tool if the Settings Window > General > Calibration > "Editable in 3D View" property is enabled. Without this property turned on the gizmo tool will not activate when a camera is selected to avoid accidentally changing a calibration. The process for using the gizmo tool to fix a misaligned camera is as follows:
Select the camera you wish to fix, then view from that camera (Hotkey: 3).
Select either the Translate or Rotate gizmo tool (Hotkey: W or E).
Use the red diamond visual to align the unlabeled rays roughly onto their associated markers.
Right lock then choose "Correct Camera Position/Orientation". This will perform a calculation to place the camera more accurately.
Turn on Continuous Calibration if not already done. Continuous calibration should finish aligning the camera into the correct location.
