The Usage of 2D Points

The 3D point definition may include user-supplied 2D points in arbitrary views supported by the 2D point definition concept. By selecting one of the 2D point definition modes in the toolbar, the system expects the user to define a 2D point in an arbitrary view.

Note: The (2D) OFFSET FROM CURRENT function means a 2D offset from the projection of the current 3D point in a particular view. Since there may be several views in the drawing, the user is here requested to indicate the view of interest before the (2D) offset can be given. The proceeding action depends on the locking status prior to the 2D point definition as follows:

NO LOCK - This just means implicit line locking. The line will be perpendicular to the view plane and passing through the 2D point in this view. Normally, a locking may be cancelled only via the 'UNLOCK' sub-function, but here a subsequent Reject will also serve as unlock.

PLANE LOCK - This lock in combination with the 2D point and the identified view forms a sufficient condition to derive a 3D point. The resulting 3D point will then be the intersection between the locking plane and the line perpendicular to the view plane and passing through the 2D point in this view.

LINE LOCK - This lock in combination with the 2D point and the identified view forms a sufficient condition to derive a 3D point. The resulting 3D point will then be the point on the locking line closest to the line perpendicular to the view plane and passing through the 2D point in this view.

A natural way of defining a 3D point is to give two 2D points in different views: The first point will then define the position of the 3D point projected in the first view and the second point will define the depth.

Note: The reversed order will not necessarily yield the same 3D point.