Endless Line > Perpendicular (Temporary Objects Menu)

This command is used to create a Temporary Object as an endless line which is perpendicular to a line, circle, or ellipse of any type. The Construction Aid line is so constructed, that the right angle is given in normal view. If working with a distorted view (e.g. when using dimetric view) the visible angle is not 90 degrees.

Any part object in an existing object can be identified as the reference object. This can be a side of a rectangle, the arc of an ellipse segment or a circle segment within a surface.

The identified (part) object is referred to as the "Reference Object".

If an ellipse part was identified, the point at which it was clicked on (the "ID point") affects the way the rest of the command is carried out. If a perpendicular is dropped on to an ellipse, it can end on either side of the ellipse. The point closer to the ID point is used as the end point of the perpendicular (see graphic).

The point through which the perpendicular should run can be entered with the mouse by clicking anywhere in the drawing. A perpendicular is dropped from this point to the reference object.