JPS6386075A - Cad system - Google Patents

Abstract

PURPOSE:To improve the designing efficiency of a CAD system by cancelling the grid selected first with a prescribed key operation and selecting successively those grids adjacent to the cancelled one to finally select a desired grid. CONSTITUTION:The graphic information is stored in a memory 1 and other graphic information and coordinate information are added by a coordinate indicating device 2. A keyboard 3 has a shift key which designates the shifting direction when each coordinate value is corrected. An indicated coordinate shift module 4 shifts the coordinate information supplied from the device 2 in the direction designated by the keyboard 3 by an amount equal to the minimum grid space. The grid selected first is cancelled by the function of the module 4 and the grids adjacent to the cancelled one are successively selected. Thus a desired grid is finally selected.

Description

DETAILED DESCRIPTION OF THE INVENTION [Object of the Invention] (Industrial Application Field) The present invention relates to a CAD system suitable for designing electronic circuits and the like.

(Prior Art) In the process of designing electronic circuits, CAD systems that can construct complex circuits using computers are widely used.

A CAD system connects a high-resolution graphic display to the computer itself, stores all the pixels on the graphic display screen in a large-capacity memory, and makes it possible to add, change, and delete figures, improving design efficiency. This is a dramatic improvement.

Generally, when performing design work using such a CAD system, it is necessary to input the necessary shape and coordinate information using a pointing device such as a tablet or mouse while checking the graphic display screen. There is.

At this time, if the graphical information of the entire circuit is displayed on one screen, it may be difficult to visually recognize, let alone designate, a certain 81= on the graphic.

In such cases, zooming (enlarging/reducing)
Graphical information is often displayed in separate screens using a screen switching function called panning or panning.

Such split display makes it easier to recognize the figure and indicate its coordinates as the figure is enlarged, but it reduces the amount of information displayed, making it easier for the operator to In order to check the graphic information, it is necessary to perform screen switching operations many times.

For example, in the process of editing a large amount of continuous figure information, such as the design process of the pattern layout of a printed circuit board, it is difficult to edit individual figures. IFk%? It is desirable to display as much information as possible within possible limits.

However, as described above, when many figures are concentrated in a limited screen area, it becomes increasingly difficult to specify a specific figure or coordinates from among them.

This will be explained with reference to FIG.

First, the pattern L1 and the pattern L2 are separated by the grid interval, that is, the minimum work unit.

Therefore, in order to make the pattern L1 the object of the concentrated work, it is necessary to move the center of the cursor C indicated by the pointing device to the pattern L1.
Since it has to be layered on top of the previous one, extremely delicate operations are required.

At this time, as a result of the rough operation, if the cursor C points near the middle between pattern L1 and pattern L2 as shown in the figure, pattern [2 or the specified It is easy to be mistaken for ``52''.

Conventionally, when such a misidentification occurs, after canceling the pattern L2 that is being instructed at that time, the screen is switched to a screen where the distance between adjacent figures is widened enough to make the instruction, and the coordinates are displayed again. However, it is necessary to perform operations such as specifying coordinates with great care without necessarily switching the screen.

(Problems to be Solved by the Invention) The present invention was made in view of the above-mentioned circumstances, and it is possible to extremely specify specific coordinates while preserving to some extent the information about the figure displayed on the screen of the graphic display. The purpose is to provide a CAD system that can be easily and reliably executed.

[14th Form of the Invention] (Means for Solving the Problem) The CAD system of the present invention cancels the selection of a grid at a certain point by operating a predetermined key, and selects the grid adjacent to the selected grid. (transition of selections) has a selection grid multi-row means of 1.1h.

(Function) The CAD system for Mizuben February uses a certain amount of information:
゛When displaying a small figure on both sides, there is a pressure point (, 72: ``l'': , V, n, and I have selected the closest position ゛8 In this case, the function of /a;:L grid transfer means cancels the first selected grid, and then transfers the selection to the grid adjacent to that grid to create the desired grid. select.

(Example) Hereinafter, details of an example of the present invention will be described based on the drawings.

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

In the figure, 1 is a memory for storing figure information, 2 is a seat (ticket indicating device) for inputting 0 additions (figure information and coordinate information), and 3 is a shift direction when correcting each coordinate value. 4 is a keyboard with a designated shift key; 4 is a designated coordinate shift module that shifts the coordinate information input from the vote designating neck 2 in the direction designated by the keychain 3 by the minimum grid interval; 5 is a figure in the memory 1; There is a graphic display that displays information, and 6 is a CPU that controls the system's operation.

First, as shown in FIG. 2, by using the system of this embodiment,
A case will be described in which the work of adding ()D to the point Pe, passing through the joint point P1.228 is performed.

('1■ indicating vote J is Ps-P+ -P2-Pe
Since the order of Pe-+l)s→P1→P2 is not limited to i'ji, the end point Ps has already been determined by the coordinate indicating device 2.
Suppose that the relay point P1 is mistakenly designated as a point P3.

In this case, the indicated coordinates need to be corrected, so the operator presses one of the indicated coordinate shift keys provided on the keyboard 3.

FIG. 3 is a diagram showing an example of this designated coordinate shift key.

As can be seen from this figure, in the system of this embodiment, the designated coordinate shift keys are arranged in four directions, 1 to 4.

When performing the above-mentioned correction, press 4 on the key indicating the direction of point P1 as seen from point P3, that is, the shift key.

If these designated coordinate shift keys are used together with chairs 1 to 4 and a special key called a cancel key or a redirect key, it is possible to cancel the specified coordinates.

With this function, the coordinate instruction of point P3 can be easily canceled, but both the canceled coordinate information of point P3 and the shift information by the instructed coordinate shift key are sent to the instructed coordinate shift module 4.

This designated coordinate shift module 4 calculates the coordinates (point Pi) of a point shifted by the minimum grid interval in the direction designated by the designated coordinate shift key 4 from the coordinates of point P3.

This information returns to the indicated coordinate value (point P3) before the operation of the indicated coordinate shift key, and the correction is completed. Point P continues after this
The second instruction will be given.

Even if point P4 is mistakenly specified instead of point P2, it can be corrected by using 2 twice as the specified coordinate shift key.

Thus, according to the system of this embodiment, when specifying a specific figure or coordinates from among a lot of neighboring figure information, even if you accidentally specify another part, you can press the indicated coordinate shift key several times. Since you can make corrections just by doing this, you can dramatically improve the efficiency of figure editing work.

In this embodiment, a case has been described in which an error in the indicated coordinates is corrected by the system of the present invention. However, according to the system of the present invention, for example, the coordinates of the first time are roughly (indicate the basic grid) and then operate the indicated coordinate shift key to move the selection to the desired coordinates to complete the instruction.

In this embodiment, the designated coordinates are shifted in four directions, but the shift direction is not limited to this, and may be selected from eight directions, including diagonal directions.

It is also conceivable to use the numeric keys on a keyboard as the designated coordinate shift key, and it is also conceivable to use a switch on a mouse, for example, in addition to using the keys manually.

The system of the present invention is not limited to the δS meter for electronic circuits.
If the system consists of a graphic display and a coordinate indicating device, then v'! The same method can also be applied to systems used for cIt Ku meters, etc.

[Effects of the Invention] As explained above, in the CAD system of the present invention, by operating a predetermined key, the initially selected grid can be canceled, and the selection can be sequentially transferred to the grids adjacent to the grid to select the desired grid. Therefore, even if incorrect coordinates are specified, they can be corrected very easily, and design efficiency is dramatically improved.

[Brief explanation of the drawing]

FIG. 1 is a block diagram showing the configuration of a system according to an embodiment of the present invention, FIG. 2 is a diagram showing the operation of the system, and FIG. 3 is a diagram showing an example of a designated coordinate shift key in the system.
FIG. 4 is a diagram showing the process of specifying a figure displayed on a screen in a conventional CAD system.

Claims (3)

[Claims] (1) In a CAD system configured to create a design drawing by setting grids arranged in a matrix on a design space and selecting the grids necessary to create a figure, at a certain point in time by operating a predetermined key. 1. A CAD system comprising a selection grid shifting means for canceling the selection of a grid in the grid and shifting the selection to a grid adjacent to the grid. (2) Claim 1, wherein the selected grid transition means includes a grid selection cancellation key that cancels the selection of a grid at a certain point in time, and a grid specification key that sequentially specifies grids adjacent to one grid. CAD system described. (3) The CAD system according to claim 1 or 2, wherein the design drawing to be created is a design drawing of an electronic circuit.