Measure CT Marker Coordinates in Maya

What you need:

Mesh models of your radio-opaque markers in .obj format
Mesh models of your bones in .obj format
XROMM Maya Tools installed on your computer

What you get:

A .csv file containing the xyz coordinates of your markers in CT space
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1)  Import bone and marker models

(Note: Depending on the method you used to get the mesh models, the models can be in a different scale than the Maya scene (usually 10x too large). That results in animations where bones are misaligned or overlapping. It is a good idea to check the size of the bones against the grid.)

2)  Get marker coordinates from the marker models

3)  Export the CT marker locator data


If you are using XROMM_Maya_tools_2.0.5 or earlier, the window will look like this: 

  1. Export the CT marker locator data

Converting .wrl (VRML) models into Maya-friendly format (Windows only). Note: it is more convenient to export 3D models in .obj format from Amira (or Microscan Tools) because .obj files can be imported directly into Maya. These instructions are provided in case only VRML models are available.

If using older SmoothData MATLAB script, then Reset Bone element pivots(**this step omitted if using rigidBody MATLAB script)

  1. Select all marker locators for single bone (using shift select for multiple selection)
  2. Shift select the bone associated with the selected locators
  3. click the mvPv button on the XROMMtools shelf
  4. repeat for each bone