Reply To: Modifying field values for neighboring cells inside a postprocessor
Exactly, you can modify the fields of the neighbor cells in this way.
The (Const)Cell implemented in core/cell.h(h) is just one of multiple implementations of the “cell concept” in OpenLB. Specifically, it will not be used for the actual application of post processors on any of our target platforms. Instead, more efficient implementations of the concept are provided there.
The next release will include C++20 concepts declaring explicitly what a cell must provide. In the meantime you can look at the core cell header for the interface but not the concrete types.