Sensor data can be previewed in OpenSim to verify that preprocessing was done correctly and that data is in agreement with the intended model. In some cases, you can also use OpenSim's feature for Associating Data with a Motion. For example, if you've already run IK and you want to visualize sensor data or ground reaction forces in sync with the inverse kinematics trial you should use the Associate Data motion feature.
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Upon selecting this option, the user is prompted to browser browse for the .sto file containing quaternion data, an example file is provided within the OpenSense example files.
Since sensor orientation data typically do not have "translation/position" information, the user is prompted to choose a placement to position the triads corresponding to the quaternions read from the data file in the 3D window. The following options are supported for layout, as seen on the dialog belowfigure shows the dialog and the corresponding options to customize sensor data visualization.
Layout Options:
The dialog also allows for applying Rotations around X, Y, and/or Z to help users decide the transform between sensor data frame and OpenSim frame. |
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Once loaded, the sensor data "motion" is treated uniformly as other motions in the OpenSim application, in that it can be animated using the motion slider and/or synchronized with other motions if desired.
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Next: Importing and Exporting SIMM Models Previous: Previewing Motion Capture (Mocap) Data Home: Preparing Your Data |