This module contains subroutines and variables for reading and storing Wannier90 data, and for preforming Wannier interpolation.
The utility W902INTW should: 1. call read_nnkp_file in intw_intw2wannier module to obtain nnkp_exclude_bands, nnkp_kpoints, etc. 2. call read_w90_chk 3. call allocate_and_build_u_mesh 4. call write_formatted_u_mesh
Then, any utility using u_mesh can simply obtain it by using read_formatted_u_mesh