90° angle.
Plug in the power source to an outlet and connect the ground plane to a power source or battery2.
pack.
Move the center marker or the ground plane over the Origin of the Space. Adjust the feet of the3.
ground plane to align it with the origin as defined in BTWYSIWYG. You can see if the ground plane is
level with the built-in level on the ground plane arms.
Attention: The origin of the coordinate plane of the tracking area must be the same as the
origin of the virtual representation of the tracking Space as made in BTWYSIWYG. If the
virtual representation and actual tracking area do not share the same origin and axes
orientation, positional data and fixture tracking will be incorrect. The origin also needs to
match any Third Parties origin connected to BlackTrax.
Tip: Mark the origin of the Space and the orientation of the axes be marked for future
reference.
Aim the long arm of the ground plane to the venue +Y axis.4.
Aim the short arm of the ground plane to the venue +X axis.5.
In Motive, in the Camera Calibration window, in the Ground Plane tab, set the Vertical Offset (mm)6.
field to 90mm.
Attention:
If the ground plane is not placed at the height of the Origin, such as on a tripod or
stage, measure the distance between the X-Y plane and the center of the ground plane
markers. Enter in this value in the Vertical Offset (mm) plus 90mm.
You can offset the ground plane position if the ground plane cannot be placed on the
origin due to space restrictions, such as obstructions blocking the Origin from BTSensor
view.
To offset the ground plane
Measure the distance (mm) on each axis from the Origin to the ground plane's1.
position.
Record the difference in the Capture Volume Translation table.2.
Click Apply Translation.3.
Note: Each time you Apply Translation, the origin will offset by 1 by each
unit you specified. You should clear the offsets back to 0 after making them
in case the button is hit accidentally after you finish setting it.
Attention: It is possible to rotate the ground plane’s position in Motive
without physically moving the ground plane
To rotate the ground plane
Click Apply Rotation.
Enter in the desired rotation values in the Capture Volume Rotation table.
To apply the ground plane calibration, click Set Ground Plane.7.
Result: The BTSensors will know their position in relation to the ground and adjust
accordingly in Camera View window in Motive.
In Motive 2, from the File menu, choose Save Current Take or from the File menu, choose Save8.
Profile. In Motive 1.10 or lower, to save the changes to the project file, from the File menu, choose
Save Project.
Note: The axis in Motive is different than the axis in BlackTrax. Please keep that in mind
when offsetting the ground plane in Motive. For reference:
BlackTrax +X = Motive -X
BlackTrax +Y = Motive +Z
BlackTrax +Z = Motive +Y
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