Browse Prior Art Database

Dimension Generator

IP.com Disclosure Number: IPCOM000076516D
Original Publication Date: 1972-Mar-01
Included in the Prior Art Database: 2005-Feb-24
Document File: 2 page(s) / 33K

Publishing Venue

IBM

Related People

Shils, AJ: AUTHOR

Abstract

This is a process for automatically generating dimension lines for a mechanical drawing displayed on an interactive graphic display terminal.

This text was extracted from a PDF file.
At least one non-text object (such as an image or picture) has been suppressed.
This is the abbreviated version, containing approximately 53% of the total text.

Page 1 of 2

Dimension Generator

This is a process for automatically generating dimension lines for a mechanical drawing displayed on an interactive graphic display terminal.

The process generates a complete dimension control list based upon three or four input points given by the user. Referring to Fig. 1, there is shown a typical dimension with the respective parts labelled. The user provides the points P1, P2 and P3 to the automatic process by electronic pen entry. or equivalent means. From these three points, the process generates two extension lines, one dimension line, two arrowheads, and the location where the dimension and text is to be started with its direction. The characters which define the dimension and additional text are then entered. The numerical value is extracted from the character string.

In certain set use a fourth point P4 is required. For example, as shown in Fig. 2. unambiguous point P4 indicates that the dimension line is horizontal. The condition that is satisfied is, Delta X >

Delta Y. If a vertical dimension is required, then Delta Y > Delta
X.

The dimension control list consists of a section of the pointing sequence list (PSL) and is associated with the graphic information which is being dimensioned. The correct PSL entries are located, based on the position information of the part of the drawing to which the dimensions relate, in whatever storage means contains the digital representation of the drawing. The PSL contains the three reference points, P1, P2, and P3, (not P4), followed by the character information which def...