Auxiliary Views n Recall principal planes F H

Auxiliary Views n Recall: ¨ principal planes (F, H, P) give principal orthographic views n Auxiliary plane ¨a projection plane that is not parallel to any of the principal planes ¨ gives auxiliary view ¨ used to show true size of inclined or oblique planes

Auxiliary view Top Front Right

Object in glass box, and resulting six views when the box is unfolded

Object in glass box with special auxiliary plane

Primary Auxiliary Views Projected from a principal orthographic view using a primary auxiliary plane n Primary auxiliary reference plane (ARP) is perpendicular to one of the principal planes but inclined with the other two n Folding-Line Model n ¨ Think of auxiliary planes as planes that fold from principal planes

Unfolding the glass box to create an auxiliary view of the inclined plane

¨ Projected Height Auxiliary View from the top view ¨ Use heights of points from the horizontal reference plane

Height Auxiliary View: Steps ¨ Projected from the top view ¨ Use heights of points from the horizontal reference plane

¨ Projected Depth Auxiliary View from the front view ¨ Use depths of points behind the frontal reference plane

Depth Auxiliary View: Steps

¨ Projected Width Auxiliary View from the right view ¨ Use widths of points with respect to the profile plane

Secondary Auxiliary Views Projected from a primary auxiliary view n Used to show true size of oblique planes n Secondary auxiliary reference plane (ARP 2) is perpendicular to ARP 1 n Use distance of point from ARP 1 (same in secondary auxiliary view as in principal orthographic view) n

Secondary Auxiliary View