JPS60214082A - Graphic data processing system - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

Detailed Description of the Invention (a> Technical field of the invention The present invention is a design support system (CAD) using a computer.
Regarding the graphic terminal device used for The present invention relates to a graphic data processing system that enables the creation of graphic data, and also enables the divided use of areas outside the graphic data input area of the graphic input device.

(b) Prior Art and Problems FIG. 1 is a diagram showing an example of a graphic terminal device used in a design support system or the like. Graphic terminal device 1 is keyboard 2
A graphic input device 3 is connected to the computer, and data is exchanged with the computer via a line 10. An operator using a graphic terminal device 1 used in a design support system or the like normally talks to a computer using a keyboard 2, inputs graphic data of a drawing 6 and a menu 5 from a graphic input device 3, and sends this to the computer. The processed data is displayed on the graphic terminal device 1 as shown in Table 1. Generally, a tablet is used as the graphic input device 3. A drawing 6 placed on the tablet is hit with a coordinate indicator, such as a pen 4, and the coordinates indicated by the pen 4 are read and become input data. . When the drawing 6 that is the source of the input data is placed in the graphic data input area 7 of the graphic input device 3, the drawing 6 is tilted with respect to the coordinate axes of the tablet, so this tilt must be corrected. By the way, in the conventional technology, this tilt correction is carried out by the graphic input device 3 itself or by a computer, and when inputting graphic data, the graphic data input area 7 of the graphic input device 3 and the menu manual area 8 are separated. It is common to use. However, when the graphic input device 3 corrects the inclination, the entire tablet becomes a symmetrical area for angle correction.
There is a drawback that it is impossible to separate the graphic data input area 7 and the menu manual area 8.

Furthermore, when the calculator corrects the inclination, there is no correspondence with the coordinate system of the graphic terminal device l, so the movement of the cursor 9 when inputting graphic data and the graphic display do not match. That is, generally speaking, whether or not graphic data is input into a computer is determined by whether the switch of the pen 4 is on (normally, input is made when it is on) or off. When the switch of the pen 4 is off and the pen is within the graphic data input area 7, operations such as which data on the drawing 6 to operate next on the display contents of the graphic terminal device 1 are made easier. Therefore, the cursor 9 follows on the display screen. For example, suppose that a line drawn horizontally to the drawing 6 is scanned with the pen 4 on the drawing 6. Since the drawing 6 is tilted, the cursor 9 moves on the display screen tilted. However, the graphic data on the display screen is horizontal because the slope has been corrected. . This has the disadvantage that it is difficult for the operator to operate.

(C) Object of the Invention In view of the above-mentioned drawbacks, the object of the present invention is to provide graphic data processing that enables multi-purpose use of a graphic input device for inputting graphic data, and also enables ease of operation by making it possible to create positional deviation correction data. The goal is to provide a system.

(d) Configuration of the Invention The configuration of the present invention includes a graphic display device that displays graphic data;
A graphic data processing system comprising a drawing to be displayed on the graphic display device and a graphic input device in which the drawing is installed and transmits coordinate data indicating a display position of a graphic on the drawing to the graphic display device, recognition means that divides and recognizes the input area of the graphic input device into a drawing area and other areas based on previously input coordinate data indicating a drawing installation area of the graphic input device; calculation means for calculating a correction value for coordinate data in the drawing area from the deviation angle between the drawing installed with a reference point and the coordinate system of the graphic input device; Only the data determined to be converted into coordinate data calculated by the calculation means and sent to the graphic display device.

(e) Embodiments of the Invention The present invention allows an operator to specify a drawing area in the coordinate system of the graphic terminal device and the coordinate system of the graphic input device, and input data from the specified area. The angle of the coordinate data is corrected in the coordinate system of the graphic terminal device, and the cursor is controlled based on this angle correction. Then, when reporting the coordinate data input from the graphic input device to the computer, it is determined whether the data is within the drawing area, the data within the drawing area is sent after correcting the angle, and the data from other areas are In the evening, it was sent out as is.

In FIG. 1, the operator hints at the keyboard 2 or menu 5 area with the pen 4, and then hints at the coordinate point A in the drawing 6.
, B, and C as hints and input each coordinate data. The drawing area is determined by specifying the coordinate points A, B, and C.

FIG. 2(a) is a diagram illustrating the coordinates when the drawing 6 is placed on the graphic data input area 7 of the graphic input device 3.
b) is a diagram illustrating a state in which the angle of Drawing 6 of (al) has been corrected. For example, it is assumed that Drawing 6 is inclined at an angle shown by θ with respect to the X axis. A, B, C3 indicating the drawing area The coordinates of the points are A is Xa and Ya, B is xb and yb, and C is Xc and Yc. By inputting the coordinates of each point, the inclination angle θ in Drawing 6 can be detected.Here For example, if the reference point of the drawing 6 is A, the graphic terminal device 1 performs coordinate transformation and corrects the angle as shown in FIG. Fix it. In this case, if the coordinates of point A are set to 0,0, the coordinates of new point B' of point B relative to the new reference point A' are xb',
At o, the coordinates of the new point C'' of point 0 are O, Yc',
The coordinates of the new point D'' of point D are Xb', Yc'.Then, the coordinate data subsequently input from the graphic input device 3 is calculated using the following formula.That is, X'-(X-Xa ) cos θ ten (Y − Ya) s
inθY' = (X - Xa) sin o+(Y
-Ya) Calculate cos θ. Here, X and Y are the coordinates of each input point of the graphic data on the drawing 6. And the coordinate data X', Y' obtained by this calculation is 0
≦X” ≦xb゛0≦Y” ≦Yc' If the conditions are satisfied, that is, if the coordinate data is graphic data generated from within the drawing area, the data is subject to coordinate transformation, so X and Y are The coordinates of
The coordinates are transformed into ゛ and sent to the computer. Other coordinate data generated from outside the drawing area is sent to the computer as is without coordinate conversion. FIG. 3 is a block diagram showing one embodiment of a circuit for performing the above calculation. The coordinate data of point A, -Xa and -Ya, are entered into registers 11 and 15, respectively, -Xa is added to X in adder circuit 12, and -Ya is added to Y in adder circuit 14. and (cosθsi
n θ, -5in θcos θ) In the matrix multiplication circuit 13, X - be done. This is displayed as input graphic data on FIG. 6 on the new coordinates of FIG. 2 (bl).

Next, when the pen is in the drawing area with the pen turned off, the cursor follows the movement of the pen, but in this case, by performing coordinate transformation using the formula described below, the graphic input device You can follow the movement of the pen on 3.

X=m M and N are counts for positioning the reference point A of the drawing on the display surface, and are both given by a computer. 2 is a block diagram showing an embodiment of the circuit. Counts m and n are entered from the computer into registers 16 and 23, respectively, and the multiplier circuit 17 multiplies the count m by X" and sends it to the adder circuit 19. Count M sent out from the computer
, N are entered into registers 18 and 21, respectively, and the count M is added to m X ' in an adder circuit 19, and X is sent out. On the other hand, the count n read from the register 23 is
It is multiplied by ゛ and sent to the adder circuit 20. register 2
The count N read from 1 is added to nY' in an adder circuit 21, and Y is sent out.

(f) As described in detail, the present invention allows the graphic input device to be divided into a portion that corrects coordinate data and a portion that uses the coordinate data obtained from the graphic input device as is. This makes it possible to use it for multiple purposes, and improves operability because the movement of the cursor follows the movement of the pen on the display screen.

[Brief explanation of drawings]

Figure 1 is a diagram showing an example of a graphic terminal device used in a design support system, etc. Figure 2 shows the coordinates when the drawing is placed on the graphic data input area of the graphic input device and the state in which the angle of the drawing is corrected 3 and 4 are block diagrams showing an embodiment of a circuit for performing calculations of the present invention. 1 is a graphic terminal device, 2 is a keyboard, 3 is a graphic input device, 4 is a pen, 5 is a menu, 6 is a drawing, 11.15,1
6.1B, 21.23 are registers, 12.14. '19
．． 20 is an adder circuit, and 17.22 is a multiplier circuit. Tea I Ward 2 Senka 3 @gucha 4

Claims (1)

[Claims] A graphic display device that displays graphic data, a graphic input device that sends a drawing to be displayed on the graphic display device and coordinate data indicating the display position of a graphic on the drawing where the drawing is installed to the graphic display device. A graphic data processing system comprising: recognition means for dividing and recognizing the input area of the graphic input device into a drawing area and other areas based on coordinate data indicating a drawing installation area of the graphic input device inputted in advance; and a calculation means for calculating a correction value for the coordinate data in the drawing area from the deviation angle between the coordinate system of the graphic input device and a drawing set with a reference point determined from the coordinate data indicating the drawing area, A graphic data processing system characterized in that only data determined by the recognition means to be coordinate data within a drawing area is converted into coordinate data calculated by the calculation means and sent to the graphic display device.