UG二次开发 获取面法相（C#）

1 　　NXOpen.Direction direction1;
2 　　direction1 = workPart.Directions.CreateDirection(face, NXOpen.Sense.Forward, NXOpen.SmartObject.UpdateOption.WithinModeling);
3 　　//是否反向  direction1.ReverseDirection();
4 　　Vector3d faceVector = direction1.Vector;