/// <summary>
/// Add a physical group of dimension `dim', grouping the model entities with
/// tags `tags'. Return the tag of the physical group, equal to `tag' if `tag'
/// is positive, or a new tag if `tag' < 0.
/// </summary>
public static int AddPhysicalGroup(int dim, int[] tags, int tag = -1)
{
var index = Gmsh_Warp.GmshModelAddPhysicalGroup(dim, tags, tags.LongLength, tag, ref Gmsh._staticreff);
Gmsh.CheckException(MethodBase.GetCurrentMethod().MethodHandle);
return(index);
}
