Periodic Boundary Condition for the PointCloud Geometry

[LordPontiag]

Dear Professor @lululxvi

I wanted to add periodic boundary condition to a point-cloud geometry, but i doesn't support. what can I do in this regard?
I cannot switch to rectangular or similar ways of adding geometry to my code. The geometry has some complexities and I must use point cloud.
I'm solving Naiver-Stokes equations. I have Walls and periodic Inlet-Outlet conditions. The point arrays of inlet, outlet, and walls are available separately in addition to internal points.

[lululxvi]

In order to use periodic BC, the code needs to know for any point, where its periodic point is. In general, this is unknown for an arbitrary PointCloud. To do so, you need to change the code of PointCloud by adding periodic_point function (https://deepxde.readthedocs.io/en/latest/modules/deepxde.geometry.html#deepxde.geometry.geometry.Geometry.periodic_point).