How to get the coordinates of the point above the immersion boundary in openfoam e4.1
 

Hello Gus!
Currently I want to get the coordinates of the boundary point on the immersion boundary to use for calculation. My immersed boundary is motion, and I want to get the coordinates of the boundary point after each movement.
i use movingimmersedboundary.C to implement my motion.Is ipatch in this C file the boundary point I need? Whether it is always updated
Thank you all for your help！