JPH05174083A - Dimension line generator - Google Patents

Abstract

PURPOSE:To easily perform a dimension line input system and to reduce the omission of dimension line input when graphic processing is performed by a computer aided design(CAD) system. CONSTITUTION:This generator is comprised of a central arithmetic processing unit 1, the main body of the computer aided design system which operates CAD incorporating memory, etc., a keyboard 5 provided with a means to input a character, a pointing device 6 which designates coordinates and selects a command, and a display device 3 that is a means to display a graphic plotted by the pointing device, and a dimension draft line is automatically generated at a position where the dimension line is possibly drawn, and most of the drawing work of the dimension line can be automatized by designating the reference line of each dimension. Also, a solved dimension draft line can be automatically erased.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a dimension line generator for computer-aided design and the like.

[0002]

2. Description of the Related Art In a conventional graphic processing device such as CAD, when a dimension line is entered for an inputted figure element, at that time, two or more points or dimensions which form the reference of the dimension line are entered. The element was designated by the pointing device, and the position where the dimension character was arranged was designated for each dimension line. In this case, if the drawing becomes complicated, the number of operations for drawing the dimension line becomes very large and it takes time.

Further, in order to arrange the dimension lines at equal intervals so that they can be easily seen, the layout is frequently changed by using a grid, and the dimension lines are often omitted.

[0004]

However, in the conventional dimensioning method described above, when the drawing becomes complicated, the number of operations for dimensioning lines becomes very large and it takes time.

Further, in order to arrange the dimension lines at equal intervals so that they can be easily seen, the layout is frequently changed by using a grid, and there is also a problem that the dimension lines are often omitted.

[0006]

In order to solve the above problems, the present invention automatically creates a graphic element called a link in the graphic data storage unit when creating or editing a graphic element, and based on this link, the size is calculated. The draft line element, dimension line prohibited area, and area center line are automatically generated. After that, the CAD operator specifies a reference dimension draft line and a dimension draft line dependent on the dimension draft line. After that, the dimension line is automatically generated based on them, and the resolved dimension construction line is automatically deleted. As described above, the operation for writing the dimension line is simplified, and the dimension draft lines remaining without being deleted can be visually discriminated, so that omission of the dimension line entry can be reduced.

[0007]

According to the present invention, by the above-mentioned means, it becomes unnecessary to specify a reference point and a position for arranging dimensions for each dimension line to be entered, and the dimension line input work can be efficiently performed. The remaining dimension draft lines can be used to reduce omission of dimension line entry.

[0008]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS A dimension line generator according to an embodiment of the present invention will be described in detail below with reference to the drawings.

FIG. 2 is a block diagram showing the hardware configuration of the dimension line generator, the graphic processing execution program operating on the virtual memory, and the graphic data storage unit. FIG. 2 is a diagram in which the graphic data in which the creation and editing of the graphic elements other than the dimension line are completed is displayed on the display device. Link elements L1 to L2 are automatically created. The link element is usually created at the end point of each line graphic element, the circle, and the center of the arc graphic element. When a line graphic element is stretched or cut, the link moves or is created accordingly. The data structure of the link element includes an X coordinate, a Y coordinate, an identifier of the element including the X coordinate, and a state (horizontal, vertical) of the included graphic element. If two elements are cut at their intersections, the links at the end points of each element will be unified into one, and the data structure of the link will contain the identifiers of the two elements. If filleting or chamfering is performed on two elements, the position of the link becomes the intersection of the two elements (L1).

FIG. 2 is a diagram in which a dimension draft line, a dimension prohibition region, and a region center line are generated for the created link element. The dimension prohibited area and the area center line can be created by using the X and Y coordinates of the link element, and the dimension draft line can be created only on the right and bottom of the area center line, for example. Includes the state of the graphic element (horizontal, vertical), so the dimensions of the horizontal and vertical lines can create link elements only on the right side and the lower side (A, B, etc., and d1 for the same reason). It is also possible to create a draft line with an angular dimension like.

FIG. 3 is a drawing after creation of the dimension draft line. A dimension line is represented by a reference point or a reference line and its dependent points, or the distance or angle between the lines, and thus CAD
The operator designates the reference line (A in FIG. 3) and the subordinate lines (a1, a2, a3). The dimension placement positions are automatically placed outside the dimension prohibited area at equal intervals. Similarly B
B1, b2, b3, b4 for C, and c1 for C
Also, d1 is designated for D.

In this way, dimension lines are automatically created as shown in FIG. The dimension draft line a remaining in the figure is unnecessary and is deleted. FIG. 5 shows the control procedure of this embodiment. In step s1, a figure is created and an edit link is created. Then, in step s2, a dimension draft line, a dimension line prohibited area, and an area center are created. In step s3, the dimension line obtained above is created.

[0013]

According to the present invention, the data necessary for creating the dimension line can be automatically created during drawing, and the dimension line can be created at once by using the data. It is possible to increase the size of the dimension line, and display the dimension draft line that remains without being deleted so that the omission of the dimension line can be reduced.

[Brief description of drawings]

FIG. 1 is a block diagram showing a configuration of a dimension line generator according to an embodiment of the present invention.

FIG. 2 is a diagram after a figure is input in this embodiment.

FIG. 3 is a diagram after a dimension draft line is created in this embodiment.

FIG. 4 is a detailed view after creating the dimension line in the present embodiment.

FIG. 5 is a flowchart showing a process of creating a drawing in this embodiment.

[Explanation of symbols]

 1 Central Processing Unit 2 Display Control Device 3 Display 4 Input Control Device 5 Keyboard 6 Pointing Device 7 Virtual Memory 8 Graphic Data Storage 9 Graphic Processing Execution Program 10 Processor Address / Data Bus

Claims (1)

[Claims] 1. A graphic element on which a dimension line can be entered, which comprises a means for inputting graphic information, a means for displaying the input graphic information, a central processing unit for processing the input information and storing the processed information, and a memory. A dimension line generating device characterized in that a dimension draft line is generated and a dimension line is generated by designating a draft line as a reference for each dimension line.