Origins and Centre Lines

On the isometric, a centreline is drawn through the origin of the reference element. The reference dimension will be drawn from the centreline of the reference element.

The centreline will normally be the Z-direction of the element, as defined by its orientation.

• For Piping components the p-leave will be used.

• For Sections the p-line direction will be used.

• For Points, the direction of the centreline will be to the next Point in the list. For the last Point in the list, the direction from the previous Point will be used. If there are no other Points, the direction will be the Z-direction of the Point’s owner.