Previously the function took 'invert' and 'add' parameters to indicate what operation should be performed on the displacements, replaced these with three named modes: APPLY_DISPLACEMENTS, CALC_DISPLACEMENTS, and ADD_DISPLACEMENTS.
Previously the function took 'invert' and 'add' parameters to indicate what operation should be performed on the displacements, replaced these with three named modes: APPLY_DISPLACEMENTS, CALC_DISPLACEMENTS, and ADD_DISPLACEMENTS.