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def test_C3DFileAdapter(self):
        try:
            adapter = osim.C3DFileAdapter()
        except AttributeError:
            # C3D support not available. OpenSim was not compiled with BTK.
            return
        tables = adapter.read(os.path.join(test_dir, 'walking2.c3d'), 0)
        markers = tables['markers']
        forces = tables['forces']
         
        tables = adapter.read(os.path.join(test_dir, 'walking5.c3d'), 1)
 
        # Marker data read from C3D.
        markers = tables['markers']
      
        # Flatten marker data.
        markersFlat = markers.flatten()
      
        # Make sure flattenned marker data is writable/readable to/from file.
        markersFilename = 'markers.sto'
        stoAdapter = osim.STOFileAdapter()
        stoAdapter.write(markersFlat, markersFilename)
        markersDouble = stoAdapter.read(markersFilename)
      
        # Forces data read from C3d.
        forces = tables['forces']
        fpCalMats = forces.getTableMetaDataVectorMatrix("CalibrationMatrices")
        fpCorners = forces.getTableMetaDataVectorMatrix("Corners")
        fpOrigins = forces.getTableMetaDataVectorMatrix("Origins")
      
        # Flatten forces data.
        forcesFlat = forces.flatten()
      
        # Make sure flattenned forces data is writable/readable to/from file.
        forcesFilename = 'forces.sto'
        stoAdapter.write(forcesFlat, forcesFilename)
        forcesDouble = stoAdapter.read(forcesFilename)
      
        # Clean up.
        os.remove(markersFilename)
        os.remove(forcesFilename)