JPS61273671A - Cad system - Google Patents

Abstract

PURPOSE:To attain the automatic addition of a dimensional line to an indicated element just by indicating an area to which the dimensional line should be added after adding a dimensional line handling routine to a CAD system containing a graphic data base, a graphic display access routine and a graphic data base access routine. CONSTITUTION:A graphic is drawn on a graphic display 3 through a graphic input device 4 and an area where the addition of a dimensional line is desired is indicated. A CAD function routine 61 calls out a dimensional line handling routine 62. A dimensional line subject element selection routine 62, selects a subject graphic element of the dimensional line out of a graphic data base 1 according to the coordinate value. Then this subject element is stored in a dimensional line subject element work file 6. An analysis routine 62b detects the subject graphic elements out of a dimensional line subject element work file 5. These graphic elements are displayed on the display 3 after their positions are decided by a dimensional line production routine 62c via a display work file access routine 64 and then stored in a graphic data base 1 through a graphic data base access routine 63.

Description

[Detailed Description of the Invention] [Industrial Application Field] The present invention is based on CAD (Computer Aided Design).
This invention relates to a CAD system that adds dimension lines to figures drawn on a display device.

[Prior art and problems]

2. Description of the Related Art In recent years, CAD systems that use graphic displays (graphic display devices) to interactively perform drafting work and the like have been attracting attention.

However, in a CAD system, dimension lines generally have to be specified one element at a time, and it is not easy to handle the dimension lines.

[Problem solving means and effects]

The present invention provides a CA having a graphical database, a graphical display access routine, and a graphical database access routine.
By providing a dimension line handling routine in the D system, by simply specifying the area to which a dimension line should be added to a figure drawn on a display device, dimension lines can be automatically added to the specified element. This is a special CAD system that can be added. Hereinafter, the present invention will be explained in detail with reference to embodiment drawings.

(Example) Figure #I1 is a conceptual diagram showing the main part configuration of an embodiment of the present invention, and Figure 2 is a diagram showing a typical dimension line addition example P3.Here, 6 is a CAD routine, CAD routine 6 is a CAD function routine 61,
Dimension line handling routine 629 consists of a figure database access routine 63 and a display work file access routine 64, and the dimension line handling routine 62 consists of a dimension line target element selection routine 62a, an analysis routine 62b, and a dimension line creation routine 62c. .

That is, the figure database 1 stores various figure information and drawing information, and the display work file 2 contains the information read out from the figure database 1 and the drawing currently displayed on the screen of the graphic display 3. The graphic display 3 is for displaying figures, and the graphic human power device 4 is for inputting figures and various control information. Note that as the graphic input device 4, a tablet, hate pen, track hole, etc. can be used.

The dimension line target element work file 5 is a work file in which only 4N elements to which dimension lines are added are stored.

The CAD function routine 61 is a processing routine for realizing each function of CAD, and the dimension line handling routine 6
The function of 2 is similar to that of ``Huggi''.

The dimension line target element selection routine 62a is a routine that selects an element to be a dimension line target from a designated area to which a dimension line is to be added, as will be described later, and stores it in the dimension line target element work file 5. The analysis routine 62b is a routine that selects elements that are compatible with various dimension lines and determines the positions at which the dimension lines are created. Furthermore, the dimension line creation routine 62c is a routine that actually creates the dimension line whose position has been determined by the analysis routine 62b.

The graphic database access routine 63 is for accessing the graphic database 1, and the display work file access routine 64 is for accessing the display work file 2.

This figure shows a concrete example of the operation of such a system.

When adding dimension lines to a certain figure, the operator draws the figure on the graphic display 3 using the graphic input device 4 and indicates the area to which the dimension line is to be added.

Here, in FIG. 2, Zt e Zs e Zs
+ Za m Zs indicates the area mentioned above. That is, (a) is an example of horizontal dimension lines and vertical dimension lines, (b) is an example of horizontal dimension lines and vertical dimension lines including radial dimension lines, and (C) is an example of horizontal dimension lines and vertical dimension lines.
is an example of a horizontal dimension line including a chamfer dimension line, a vertical dimension line, (
d) shows an example of the diameter dimension line, and (e) shows an example of the diameter dimension line of the rotating body. However, for the sake of convenience, the range of the area is shown here to make it easier to understand where the dimension lines are added.

Methods for specifying the addition of dimension lines include a method of specifying ξ geometric elements in the N polygon with N points, and a method of specifying the ξ figure element inside the polygon with N points, and a method of specifying the ξ figure element in the inside of the N polygon using N points, and a method of specifying the ξ figure element in the inside of the polygon with N points, and a method of specifying the two points as the lower left (right) corner and the right (left) corner of the rectangle. ) A method of specifying the graphical element included in the rectangle to be the lower corner; - A method of indicating an element and making it a group of elements that are directly in contact with the element by ξ.

Next, by giving such an instruction, dimensions can be automatically added to the specified element.

Here, the CAD function routine 61 or the dimension line handling routine 62 is called, and the dimension line target element selection routine 62a selects the graphic element to be the target of the dimension line from the graphic database 1 by the coordinate value, and the target is dimensioned. It is stored in the line target element work file 5.

Thereafter, the analysis routine 62b analyzes horizontal dimension lines, for example.

The target graphic element is searched from the dimension line target element work file 5 in the order of the radius dimension line, the diameter dimension line 9, and the diameter dimension line of the rotating body. At that time, the horizontal dimension line is a horizontal line, the vertical dimension line is a vertical line, the radius dimension line is a circular arc 1 chamfer dimension line is a diagonal line whose line segment length is less than the specified value, and the diametric dimension line is a full circle 1 rotation body. The diameter dimension line may be obtained by searching for straight lines parallel to the dashed-dotted line. Edict, Figure 2 (a), (b
), as shown in (C), even if there are circular arcs or chamfered lines at both ends or one end P7 of the horizontal dimension line and vertical horizontal line, this is taken into consideration. Furthermore, the position of the dimension line is determined in advance by a method such as upward for the horizontal dimension line and rightward for the vertical dimension line. After the position is determined, the dimension line creation routine 62c
The data is displayed on the graphic display 3 through the display work file access routine 64 and stored in the graphic database 1 through the graphic database access routine 63.

〔Effect of the invention〕

As described above, according to the present invention, it is possible to provide an exceptional CAD system that effectively uses the dimension line addition function to simplify the dimension line addition work.

[Brief explanation of drawings]

FIG. 1 and FIG. 2 are a conceptual diagram showing the main structure of an embodiment of the present invention and a diagram showing a typical example of addition of dimension lines, respectively. 1...Graphic database, 3...Graphic display, 4...Graphic cadence, 5...Dimension-target element work file, 62... ...Dimension line handling routine, Zt, Z2 + Zs * Z4 *Zi...
···region.

Claims (1)

[Claims] In a CAD system having at least a figure database in which figures and drawings are stored, a figure display handling program package, and a figure database handling program package, the target part of the figure to which a dimension line is to be added to the figure drawn on the graphic display is By specifying the area to be included, a graphical element that will become the dimension line of the area is selected, a dimension line is selected and positioned corresponding to the graphical element, and a drawing with the dimension line added is created. A CAD system characterized by the following.