set_mesh_refinement_region# FdtdSession.set_mesh_refinement_region(box: Box, dx: float, dy: float, dz: float) → None# Add a mesh refinement region to the FDTD simulation. Parameters: boxBoxSpatial region for mesh refinement. dxfloatMesh size in x-direction (meters). dyfloatMesh size in y-direction (meters). dzfloatMesh size in z-direction (meters).