/// <summary>
/// Select entities in the user interface. If `dim' is >= 0, return only the
/// entities of the specified dimension (e.g. points if `dim' == 0).
/// </summary>
public static int SelectEntities(out ValueTuple <int, int>[] dimTags, int dim = -1)
{
unsafe
{
int *dimTags_ptr;
long dimTags_n = 0;
var index = Gmsh_Warp.GmshFltkSelectEntities(&dimTags_ptr, ref dimTags_n, dim, ref Gmsh._staticreff);
dimTags = UnsafeHelp.ToIntArray(dimTags_ptr, dimTags_n).ToIntPair();
Gmsh.CheckException(MethodBase.GetCurrentMethod().MethodHandle);
return(index);
}
}