How to add a curved reflection wall

Hi all
I was trapped by adding a curved reflection wall in LAMMPS. Actually this reflection wall is the membrane of red blood cell, its mathematical function is known. Does any one know how to achieve it?

Thanks very much.

Best regards

Yihua Zhou

Hi all
I was trapped by adding a curved reflection wall in LAMMPS. Actually this reflection wall is the membrane of red blood cell, its mathematical function is known. Does any one know how to achieve it?

With some creative c++ programming I would say.