JPS613280A - Cad device - Google Patents

Abstract

PURPOSE:To display a magnified figure of desired part of a graphic form on the screen of a display means during digitizer operation by generating a dummy graphic form in a memory on the basis of diagonal point coordinate signals of the magnified area which are inputted through a digitizer. CONSTITUTION:An operator when displaying the magnified graphic form on the CRT screen 5 pushes a specifying button 40 provided to the cursor 4 of the digitizer 3 and digitizes diagonal points of an area in a drawing with the cursor 4. A computer 1 on receiving signals of the indication button 40 for magnified display from the digitizer 3 generates a dummy graphic form in the memory part 20 by a means 11 on the basis of diagonal point coordinate signals of the magnified area from the digitizer 3. Then, a means 12 reads the graphic form generated and stored in the memory part 20 and the display position, magnification arithmetic, etc., are processed, thereby making a magnified display on the display means 5.

Description

Detailed Description of the Invention (Technical Field of the Invention) The present invention relates to a CAD system used for automatic design of printed circuit boards, etc.
Regarding equipment. More specifically, the present invention provides a CAD device that is equipped with a digitizer, a display means, and a computer that is connected to the computer, and that creates a design model of a printed board or the like in the memory of the computer through interaction between the computer and an operator. The present invention relates to a device capable of enlarging and displaying a part of a figure on a display means.

(Prior Art) Conventionally, in a CAD device, when a part of a figure in a drawing is enlarged and displayed on a display means such as a CRT during digitizer work, the position coordinate input means such as a tablet is used to display the figure on the display means. While looking at the cursor, two desired points are specified, and a rectangular area with the two points as diagonals is enlarged and displayed.

However, since this method uses the tablet function, the movement of the cursor on the CRT screen follows the movement of the tablet pen.
Therefore, when moving to digitizer work, there is the inconvenience of having to perform an operation to return the cursor on the CRT drawing to follow the digitizer cursor. Also, if you want to enlarge another area while enlarging a part of a figure, you need to display the original size screen on the CR7 screen and then perform the same operation. be.

(Object of the present invention) The present invention has been made in view of the problems in the prior art, and its purpose is to
The present invention aims to realize a CAD device that can display an enlarged view of a desired portion of a figure on a display screen using only the cursor keys of a digitizer.

(Configuration of the present invention) The configuration of the device of the present invention for achieving such an object is as follows:
In a CAD device equipped with a digitizer, a display means, and a computer coupled to these, a designation button for enlarging and displaying a part of a figure is provided on the cursor of the digitizer, and input data from the digitizer into the computer is provided. means for inputting a diagonal point coordinate signal of the enlarged area and creating a dummy figure in the memory of the combination based on this signal; The present invention is characterized in that it includes a means for displaying the information on the means.

(Embodiment) FIG. 1 is a configuration block diagram showing an example of a device according to the present invention. In this figure, 1 is a computer, 2 is a memory coupled to the computer 1, and 3 is a digitizer having a cursor 4. The digitizer 6 outputs a coordinate signal designated by the cursor 4 to the computer 1. 5 is a display means coupled to the computer 1;
For example, a CRT is used.

40 is a designation button provided on the cursor 4 of the digitizer 3 for enlarging and displaying a part of a figure; 20 is a memory section (display file section) provided in the memory 2 for storing a dummy figure (DUMMY FIGURE); 11 is a means for inputting the diagonal point coordinate signal of the enlarged area input from the digitizer 5 and creating a dummy figure based on this signal; the dummy figure created here is stored in the memory section 20;
Store inside. 12 reads out the dummy figure stored in the memory unit 20 and sets the enlarged display center coordinate value (this is P
This is a means for performing processing to calculate an enlargement rate (referred to as AN) and an enlargement ratio (referred to as ZOOM), and displaying it on the display means 5. Note that each of the means N and '12 shown in blocks is actually executed by a program of the computer 1.

The operation of the device configured in this way will be described next.

First, when the operator wants to display an enlarged figure on the CRT screen 5, he presses the designation button 40 provided on the cursor 4 of the digitizer 3, and uses the cursor 4 to digitize the diagonal point of the area on the drawing that he wants to enlarge. . When the computer 1 receives a signal from the digitizer 3 from the instruction button 40 for enlarged display, the computer 1 uses the means 11 to create a dummy figure in the memory section 20 based on the diagonal point coordinate signal of the enlarged area from the digitizer 3. . Subsequently, the means 12 reads out the graphic created and stored in the memory section 20, performs processing such as display position 1 magnification calculation,
Enlarged display is performed on the display means 5.

FIG. 2 is a flowchart of the above operation.

(Effects of the Present Invention) As described above, according to the present invention, it is possible to specify enlarged display and enlarged area by inputting from the digitizer, and to change the display state of the CR'l'' display screen. You can enlarge any area regardless of the area.Also,
Since a tablet or tablet function is not used, there is no need for operations such as returning the movement of the cursor on the display means to follow the movement of the digitizer cursor. Therefore, according to the present invention, it is possible to realize an easy-to-handle CAD device that can easily perform enlarged display.

BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a block diagram showing an example of a device according to the present invention, and FIG. 2 is a flowchart showing an example of its operation. DESCRIPTION OF SYMBOLS 1... Combi, -ta, 11... Dummy figure creation means, 12... Display processing means, 2... Memory, 20...
・Dummy figure storage section, 3... Digitizer, 4...
Cursor, 40...Enlarged display designation button, 5...Display means.

Claims (1)

[Claims] (1) In a CAD device comprising a digitizer, a display means, and a computer coupled to these, a cursor of the digitizer is provided with a designation button for enlarging and displaying a part of a figure, and the digitizer is installed in the computer. means for inputting a diagonal point coordinate signal of the enlarged area inputted from the computer and creating a dummy figure in the memory of the computer based on this signal; A CAD device characterized by comprising: means for displaying information on the display means.