JPS62168271A - Graphic form producing device - Google Patents

Abstract

PURPOSE:To attain the accurate input of a complicated graphic form by displaying a circumscribed circle or rectangle adjacent to a drawn graphic form. CONSTITUTION:The base point of a graphic form to be drawn is first indicated on the screen of a CRT display by a mouse, i.e., a pointing device (MC: mouse cursor). Then a command of graphic form (ellipse, etc.) to be drawn is indicated by a mouse or a keyboard. A drawing start switch is pushed to decide the size of the graphic form. Here a circumscribed rectangle serving as a guidance graphic form is indicated on the screen by a mouse and old circumscribed rectangle is erased by an XOR according to the position of the guidance graphic form. Then a new circumscribed rectangle is displayed by the XOR. When a drawing switch is released, the circumscribed rectangle is erased and the parameter is calculated for an ellipse to be drawn. Thus the ellipse is displayed by the calculated ellipse parameter.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a figure creation device having a function of drawing figures such as geometric figures.

Gosei Kasame office computers, personal computers, image editing processing systems, workstations.

2. Description of the Related Art Among various information processing devices such as CAD and graphic processors, some have a function of drawing figures such as geometric figures.

Conventionally, in a figure creation device having such a drawing function, geometric figures that require a plurality of parameters are a circle, a square, a rectangle, a rhombus, and a triangle.

When inputting a trapezoid or other polygon, multiple parameters are entered numerically one by one from the keyboard.

However, in this case, since the operator cannot recognize the actual size of the figure to be drawn, there is a problem in that it is difficult to input complex figures accurately.

The present invention has been made in view of the above points, and an object of the present invention is to enable accurate input of complex figures.

In order to achieve the above object, the present invention displays a circumscribed circle or a circumscribed rectangle that is in contact with a figure to be drawn.

Hereinafter, a detailed explanation will be given based on one embodiment of the present invention.

FIG. 1 is an external perspective view showing an example of an image editing processing device having a graphic drawing function according to the present invention.

This image editing processing device has a keyboard 1 for inputting various information such as character information, control information 9 figure drawing information, etc. as input devices, and a pointing keyboard 1 for inputting coordinate instructions of figures, etc.
Mouse 2, which is a device.

It is equipped with an image scanner 3 for reading original images and the like. Furthermore, as an output device, it is provided with a CRT display device 4 having a function of displaying a single graphic character to display various information, and a laser printer 5 that prints out various information. Furthermore, a floppy disk device 1j (F D D) and a hard disk device [(H
DD).

FIG. 2 is a block diagram showing the control section of this image editing processing device.

In this control unit 10, for example, CPU, ROM, RA
A microprocessor (CPU) 11 consisting of a 16-bit microprocessor including M, etc. is in charge of controlling the entire processing device, and performs various controls according to programs stored in the main memory 12, such as calculation of graphic data and conversion to dot data. etc.

Note that the main memory 12 is stored in a floppy disk drive (FDD) 7 or a hard disk drive (HDD) at startup.
A system area (resident area) that stores resident programs such as the operating system loaded from 8, a non-resident area and data area that stores non-resident programs,
It consists of RAM etc. that constitute the working area.

The control unit 10 also includes a keyboard interface (I/F) 13 for inputting information from the keyboard 1.
and a mouse interface 14 that detects the direction and amount of movement based on the X pulse and Y pulse from the mouse 2,
A scanner interface 15 for inputting read data from the image scanner 3 is provided.

Furthermore, this control unit 10 controls the CRT display mounting 4.
1, a printer interface 17 that controls the printer 5, a floppy disk controller (FDC) 18 that controls the FDD 7, and a hard disk controller (H) that controls the HDDB.
DC) 19.

Furthermore, a communication control unit (CCU) 20 is provided that controls transmission and reception of information between the control unit 10 and other communication terminal devices.

Next, the operation of this embodiment configured as described above will be explained with reference to FIG. 3 and subsequent figures.

First, the graphic creation process executed by the microprocessor 11 of the control section 10 will be explained with reference to FIG.

In this figure creation process, the base point of the circumscribed figure specified by the pointing device (mouse 2) is taken,
The process returns to the base point input process until the base point is indicated as OK, and after the base point becomes OK, an instruction for a graphic command to be drawn is taken for the graphic command that can be drawn and is displayed on the screen.

After that, when the drawing start switch is turned on,
Import the X and Y coordinates from the pointing device, and use exclusive OR (X
OR), one figure is erased by XOR, it is determined whether the drawing switch is on, and if the drawing switch is on, these processes are repeatedly executed.

If the drawing switch is not in the ON state, the graphic parameters are calculated, the graphic is displayed, and the graphic creation process is ended.

This graphic creation process will be specifically explained with reference to FIG. 4 and subsequent figures.

In this example, circumscribed rectangles are used as circumscribed figures (guidance figures) for geometric figures such as ellipses, ellipses, rhombuses, parallelograms, etc. For polygonal geometric shapes, use a circumcircle.

Therefore, the case where a circumscribed rectangle is used will be explained with reference to FIG. 4 using the creation of an ellipse as an example. In addition, in the same figure, M
C is a mouse cursor.

(2) Indicate the base point of the circumscribed rectangle using the mouse 2, as shown in FIG.

(2) Use the mouse 2 to issue a command to draw an ellipse as shown in FIG. Note that instead of instructing commands using the mouse 2, commands may be input using the keyboard 1.

■ When you press the drawing start switch, a circumscribed rectangle as a guidance figure is displayed using XOR, with the base point of the circumscribed rectangle indicated by ■ and the position indicated by mouse 2 being diagonal, as shown in the same figure (c). Ru.

While the drawing switch is pressed, the old circumscribed rectangle is XORed according to the position specified by mouse 2.
, and a new circumscribed figure is displayed using XOR.

That is, when the drawing switch is pressed, a circumscribed rectangle is drawn on the screen using XOR as shown in FIG. 5(A) by interrupt processing, and the parameters are stored.

Then, while the drawing switch is held down, click Mouse 2.
Assuming that the indicated position has been moved, as shown in Figure S (B), the circumscribed rectangle displayed in Figure (A) is deleted by XOR, the new parameters are imported from mouse 2, and the circumscribed rectangle is changed. Redisplay and memorize the parameters.

As a result, it appears to the user that the circumscribed rectangle is deformed in accordance with the movement of the mouse 2.

(2) When the drawing switch is released, the currently displayed circumscribed rectangle is erased by XOR as shown in FIG. 4(d), and the parameters of the ellipse inscribed in the rectangle are calculated from the circumscribed rectangle at this time. Note that the graphic parameters depend on the display device.

■ Using the ellipse parameters calculated in ■.

An ellipse is displayed as shown in FIG.

In addition, in the case of two elliptical characters, a rhombus, a parallelogram, etc.,
The only difference is the graphical parameters calculated and displayed in , ■.

Next, the case where a circumscribed circle is used will be explained with reference to FIG. 6, taking as an example the creation of an equilateral triangle. In addition, in the same figure, M
C is a mouse cursor.

② Indicate the base point of the circumscribed circle (the center point of the circle) using the mouse 2, as shown in FIG.

■ Use mouse 2 (or keyboard 1) to select port C in the same figure)
Instruct the command to draw an equilateral triangle as shown in .

(2) When the drawing start switch is pressed, the position indicated by the mouse 2 is set as a point on the circumference of the circumference, centering on the base point of the circumscribed circle indicated by (3), as shown in FIG.

That is, a circumscribed circle as a guidance figure whose radius is the distance between the base point of the circumscribed circle indicated by ■ and the position indicated by the mouse 2 is displayed by XOR.

As long as the drawing switch is pressed, the old circumscribed circle is erased by XOR and a new circumscribed circle is displayed by XOR according to the position indicated by the mouse 2.

As a result, it appears to the user that the circumscribed circle is deformed in accordance with the movement of the mouse 2.

(2) When the drawing switch is released, the currently displayed circumscribed circle is erased by XOR as shown in FIG. Note that the graphic parameters depend on the display device.

■ Using the parameters of the equilateral triangle calculated in step (2), display the tangent triangle as shown in (e) of the same figure.

In the case of squares, pentagons, etc., the only difference is the graphical parameters calculated and displayed in ■ and ■.

In this way, when drawing a geometric figure, the figure creation function of this information processing device displays a circumscribed circle or a circumscribed rectangle that touches the figure to be drawn. Since figures that can be easily drawn are displayed as guidance figures and complex geometric figures are drawn, complex geometric figures can be entered accurately.

In the above embodiments, a mouse is used as an example of a pointing device, but other devices such as a tablet type input device may also be used.

In addition, in the above embodiment, an example of drawing a geometric figure was described, but not only geometric figures but also, for example, when inputting character data or image data, the size of the input character or image can be It is also possible to display a guidance figure, for example a rectangle, indicating the current state, and input characters, images, etc. into this guidance figure.

Furthermore, the graphic creation device implementing the present invention is not limited to the above-mentioned image editing processing device, but can also be applied to other office computers and personal computers.

The present invention can be implemented in various information processing devices such as word processors, data processors, workstations, and CAD.

Effects As explained above, according to the present invention, complex figures can be input accurately.

[Brief explanation of drawings]

FIG. 1 is an external perspective view showing an example of an image editing processing device having a geometric figure drawing function according to the present invention, FIG. 2 is a block diagram showing a control section thereof, and FIG. 3 is a block diagram showing a control section thereof. FIG. 4 and FIG. 5 are explanatory diagrams for explaining the ellipse creation process and explanatory diagrams showing details thereof. FIG. 6 is an explanatory diagram for explaining the creation of an equilateral triangle. 1...Keyboard 2...Mouse 3...Image scanner 4...CRT display device 5...Laser printer 10...Control unit 11.
...Microprocessor 12...Main memory Fig. 1 Fig. 2 L
Figure 4 Figure 6 (A) (C) (D) (E)

Claims (1)

[Claims] 1. A figure creation device having a figure drawing function, characterized by comprising a circumscribed figure display means for displaying a circumscribed circle or a circumscribed rectangle that is in contact with a figure to be drawn.