Occasionally you might use a lattice to build a more complicated 2D layout design. In
such design the lattice might also be rotated. You do not have to create a new layout
to analyze the lattice. Use the Default Lattice Vectors and Domain Origin to set the
computational domain and to capture the correct periodicity. As an example rotate the
2D hexagonal lattice above by 10 degrees. Double click the lattice and in Lattice
properties dialog box set the Azimuth angle to 10 degrees. Close the dialog box and
open PWE Simulation Parameters dialog. Make sure you have selected defaults for
the lattice vectors and Run. The band diagrams should be the same.