JPH09259295A - Cad system - Google Patents

Abstract

PROBLEM TO BE SOLVED: To input a drawing of accurate size at an accurate position on a display screen and measure the size of the drawing by providing a display means which displays a ruler on the display screen of a display device at a desired position. SOLUTION: A storage device has a display RAM for a figure and a display RAM for a scale (ruler) 13, and those display RAMs are ORed, namely, data to be superimposed are sent to the display device to display the figure and scale. At the upper edge of the display screen 12, a tile bar 23 is provided and a program name, a file name, etc., are displayed. At the right edge and lower edge of this display screen 12, scroll areas 24 and 26 are provided. Further, the scale 13 is displayed on the screen 12 at an arbitrary position other than the title bar 23 and scroll areas 24 and 26. When a figure is drawn, this scale 13 is displayed at a desired position and a cursor 15 is moved along the upper edge of the scale 13 by using a mouse to draw a straight line 25.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a CAD (Comp
The present invention relates to a uter aided design system, and more particularly to a CAD system used by a designer or the like to input drawing information on a screen.

[0002]

2. Description of the Related Art Generally, CAD (Computer A
As shown in FIG. 5A, the idled design system is composed of a control device 1, a storage device 2, a display device 3, and an input device 4, and the designer selects the display device 3. You can design buildings and machines while watching.

The control device 1 controls the entire CAD system, and transmits and receives data to and from the storage device 2, the display device 3, and the input device 4 via the data bus 5. It controls the overall functions of the CAD system such as inputting data from the input device 4, converting the input data into display data, and transferring the display data to the display device 3.

The storage device 2 includes a ROM (read-only memory) containing a CAD program and various fixed data, a RAM (read-only memory) for various operations used by the control device 1 when executing the program, and a memory register. And a display RAM composed of a matrix of. Each memory register forming the matrix of the display RAM has one dot and one dot forming the display screen of the display device 3 described later.
Corresponding to each other, the luminance information and the color information are stored.

The display device 3 has a CRT (cathode ray tube) and a display control circuit for scanning an electron beam of the CRT in horizontal and vertical directions at a predetermined timing.

Display RA built in the recording device 2
The contents of M are sequentially read out in synchronization with the beam scanning of the CRT and supplied to the CRT, and the electron beam of the CRT is modulated by the luminance information and the color information. As a result, a dot matrix image composed of a large number of pixels having brightness and color is displayed on the CRT screen.

The input device 4 comprises a coordinate conversion device such as a mouse and a keyboard. As is well known, the mouse is an input device that can directly access the address of the memory register of the display RAM corresponding to the designated position by pointing the position or area on the display screen with the cursor. Use the mouse to move the cursor displayed on the screen to indicate an arbitrary position on the display screen, draw a new shape, delete the displayed shape, or change the shape. You can

The CAD device having the above structure operates as follows. The display RAM memory matrix is C
Display RAM compatible with RT dot matrix
An image on the CRT screen is formed by the image data formed above. That is, when new graphic data is input to the display RAM, a new graphic is displayed on the screen of the CRT, and if the graphic data of the display RAM is erased, the graphic disappears from the CRT.

By the way, as an input method for forming the graphic data in the display RAM, there are a vector data method in which the graphic data is expressed by a numerical value and a raster data method in which the graphic data is expressed by a set of points. Generally, CAD input by the vector data method is called vector CAD, and CAD input by the raster data method is called raster CAD.

In the vector CAD, for example, in order to draw one straight line A, the coordinates (X ₁ , Y ₁ ) at both ends of the straight line A,
To specify (X ₂ , Y ₂ ), and to draw the circle B, specify the coordinates (X ₃ , Y ₃ ) of the center and the radius r.

The input straight line or circle vector data is displayed in a display RAM by a vector CAD program.
Transformed into a set of points in the dot matrix of.
Therefore, in the vector CAD, in order to input and display the graphic data, the input command word (command) by the program must be used.

In raster CAD, graphic data is directly input to the display RAM using an input device such as a mouse. That is, the mouse is operated to move the cursor displayed on the CRT screen. If the register of each address of the display RAM corresponding to the movement locus of the cursor is set to a predetermined brightness and color, the locus can be displayed as a line on the display screen.

Further, the line on the display screen can be erased by tracing the line displayed on the display screen with a cursor and resetting each display data on the display RAM corresponding to the locus.

That is, if the raster CAD is used, an architect can draw a drawing on a paper placed on a drawing board by using a drawing tool such as a pencil, an eraser or a ruler.
Drawings and the like can be easily drawn using a mouse on the screen of a personal computer or the like.

In the raster CAD, it is not necessary to remember various commands defined by the program unlike the vector CAD, and the image of the designer can be freely drawn on the display screen as it is with the mouse. Further, the mouse can be used to easily modify or change the drawing.

However, in raster CAD, unlike the case of vector CAD, the position and size of a figure are not determined by numerical data, so the designer has the advantage that the position and size of the figure can be determined visually. On the other hand, there is a drawback that the position and size are uncertain.

Therefore, in the conventional raster CAD, as shown in FIG.
As shown in FIG. 7, a scale 7 and grid points 8 arranged at regular intervals are displayed on the display screen 6 to serve as a guide for the position and size of the figure 9 on the display screen 6, and FIG. As shown in FIG. 8, a scale 10 is displayed around the display screen 6.

Further, as shown in FIG. 9, in addition to the scale 10, there is also a raster CAD in which a coordinate information column 11 for displaying coordinate information of a figure is provided in a part of the display screen 6.

[0019]

However, the method of displaying the grid points 8 as shown in FIG. 6 is not sufficient for the user to accurately know the position and size of the figure. Also,
As shown in FIGS. 7 and 8, there is a problem in that even if the scale 10 is attached to the periphery of the screen, it is not possible to draw a figure having an accurate size at an accurate position. Further, as shown in FIG. 9, even if the coordinate information field 11 is set on the display screen 6, it is necessary to check it by combining the display drawing and the numerical information, and the display screen can be widely used. There is a problem that it is difficult to operate because it cannot be done.

Therefore, according to the present invention, by displaying a ruler or the like on the display screen of a personal computer or the like, the user can accurately draw the drawing on the drafting paper at the correct position so that the user draws the drawing using the ruler. There is a problem in a CAD system capable of inputting drawings of various dimensions and measuring the dimensions of the drawings.

[0021]

In order to solve the above-mentioned problems, a CAD system of the present invention comprises a display device for displaying graphics and characters, an input device for inputting the graphics and characters, input data, and In a CAD system including a storage device that stores a program that processes input data, a display device, the input device, and a control device that controls the storage device, a CAD system is superimposed on a display screen of the display device. That is, the display means for displaying the ruler at a desired position is provided.

Further, in the CAD system according to the present invention, the ruler is graduated; scale changing means for changing the scale of the ruler and the graphic is provided; the ruler and / or the scale A means for moving and / or rotating the drawing is provided; a drawing means for drawing along the ruler is provided.

With the above structure, the user can draw a figure on the display screen by using the ruler and the input device which are displayed so as to be superposed on the display screen as if the ruler was used on a drawing sheet. it can.

Moreover, since the ruler is graduated, the length and angle of the drawing can be measured. Since the scale of the ruler and the figure can be changed at the same time by the scale converting means, the dimension of the figure can be easily measured even if the scale is changed according to the overall size of the figure.

Further, since the drawing and / or the ruler can be freely rotated and moved on the display screen by the moving / rotating means, it is possible to easily draw freely.

BEST MODE FOR CARRYING OUT THE INVENTION

An embodiment of the raster CAD system according to the present invention will be described with reference to the drawings.

The raster CAD device is roughly composed of a control device 1, a storage device 2, a display device 3, and an input device 4, as in the case of the prior art shown in FIG. . A mouse is used as the input device 4, and the storage device 2 has a display RAM for graphics and a display RAM for the scale (ruler) 13 shown in FIG. 1, and performs a logical sum of these display RAMs, that is, a superimposed display. It is configured to send data to the display device 3 and display a graphic and a scale.

In the control device 1, as shown in FIG. 5B, display means 3 for displaying a ruler on a display screen at a desired position.
3 and scale changing means 34 for changing the scale of the ruler and the figure
And a moving and rotating means 35 for moving and rotating the ruler and the drawing.
And a drawing means 36 for drawing along a ruler.

FIG. 1 is an example of a display screen 12 displayed on the display device 3.

A title bar 23 (not shown) is provided on the upper edge of the display screen 12 to display a program name, a file name and the like. Scroll areas 24 and 26 are provided on the right edge and the lower edge of the display screen 12. A scale 13 is displayed at an arbitrary position on the screen 12 other than the title bar 23 and the scroll areas 24 and 26.

The scale 13 is displayed in the form of an image of a substantially triangular prism-shaped triangular scale used in architectural design, etc. The scale 13 is engraved with a scale 14 like the triangular scale and the dimensions are displayed. Has been done.

Further, on the screen 12, a cursor 15 in the shape of a pen tip which constitutes the line drawing means 36 is displayed. The cursor 15 can be freely moved on the screen 12 by moving the mouse. A line can be drawn on the screen 12 by operating the mouse to move the cursor 15.

A control box 16 is displayed at the left end of the title bar 23.
The entire system can be controlled by clicking with a mouse (not shown).

Switching keys 17 and 18 for switching screens are displayed at the right end of the title bar 23, and a plurality of screens can be switched by clicking with a mouse (not shown).

Scroll keys 19, 20, 21, 22 are displayed in the scroll areas 24, 26, and the display screen can be scrolled vertically, horizontally and horizontally by operating these keys.

Next, a method of operating the CAD system having the above structure will be described.

First, when the control box 16 is clicked and, for example, a "right angle scale display" command is selected, the right angle scale 13 is displayed on the screen 1 as shown in FIG.
2, the right-angle scale 13 disappears from the screen 12 when the "delete" command is selected, for example.

When drawing a figure, if the scale 13 is displayed at a desired position and the cursor 15 is moved along the upper edge of the scale 13 using the mouse as shown in FIG. You can draw 25.

When the scroll keys 19, 20, 21, 22 are clicked, the screen 12 is scrolled vertically and horizontally. As a result, the drawing can be moved vertically and horizontally, and when a part of the screen is enlarged and displayed, a desired part can be easily found.

When moving and rotating the scale 13,
As shown in FIG. 1B, when the control box 16 is clicked and the command of “scale move” is selected, the scale 13 is moved by the moving and rotating means 35 (see FIG. 5B) using the cursor 15. Can be moved up, down, left and right on the screen. Then, for example, if the "scale rotation" command is selected and a desired angle is set, the scale 13 is scaled to 0 as shown in FIG.
It can be rotated by a desired angle about the point.

When changing the scale of the drawing, for example, "
When the "scale" command is selected and a desired scale is set, the scale of the displayed figure is automatically changed by the scale changing means 34 (see FIG. 5B), and at the same time, the scale 1 of the scale 13 is changed.
4 automatically changes. As a result, the drawing and the scale 13 superimposed and displayed can be simultaneously reduced or enlarged.

Graphic display RAM and scale display RA
The stored contents of M are independently formed by the drawing program and the scale display program. Then, the logical sum of the storage contents of the graphic display RAM and the scale display RAM, that is, the scale to be superimposed and displayed is the CRT of the display device.
Is supplied to That is, the figure and the scale 13 are created separately and are superimposed at the time of display.

Therefore, even if the scale 13 freely moves within the screen, the graphic data already drawn and stored in the graphic display RAM is not erased. That is, display screen 1
Even if the figure is temporarily covered with the scale 13 on 2 and the figure is hidden, if the scale 13 is moved to another position, it is restored to the original shape as in the case of moving the triangular scale on the figure drawn on the paper. Appears on the screen.

When the user wants to move the created drawing, he operates the mouse to move the cursor 15.
It can be moved to a desired position.

If the control box 16 is clicked and "triangle ruler display" is selected, the scaled triangle ruler 30 is displayed as shown in FIG.
5b can be drawn. Further, as shown in FIG. 3, when the protractor 31 is displayed, the triangle 2 drawn on the screen is displayed.
An angle of 5c can be measured.

Further, as shown in FIG. 4, if the EDP template 32 is displayed, the flow chart 25d can be drawn.

In the above embodiment, the triangular scale, the triangular ruler, the protractor, and the template used for architectural design and the like are displayed on the screen, but the present invention is not limited to this, and any ruler, The scale may be displayed.

[0048]

As described above, the CA according to the present invention
In the D system, a ruler can be superimposed and displayed, and the ruler can be freely moved within the screen to draw a figure or measure the size of a line or the like.

Therefore, an architect or the like can draw a drawing quickly and accurately by operating the mouse on the screen of a personal computer in the same sense as drawing a drawing on a drawing sheet using a ruler. . Since the drawing data of the created drawing can be recorded, it can be effectively used when drawing a similar design drawing or the like.

[Brief description of drawings]

FIG. 1 is an explanatory diagram showing a first example of a display screen in an embodiment of a CAD system according to the present invention.

FIG. 2 is an explanatory diagram showing a second example of a display screen in the embodiment.

FIG. 3 is an explanatory diagram showing a third example of a display screen in the embodiment.

FIG. 4 is an explanatory diagram showing a fourth example of a display screen in the embodiment.

FIG. 5 is a configuration diagram of a CAD system.

FIG. 6 is an explanatory diagram showing an example of a display screen of a conventional CAD system.

FIG. 7 is an explanatory diagram showing another example of the display screen of the conventional CAD system.

8 is an explanatory diagram showing an example of half scale display of FIG. 7. FIG.

FIG. 9 is an explanatory diagram showing another example of the display screen of the conventional CAD system.

[Explanation of symbols]

1 control device, 2 storage device, 3 display device,
4 input devices, 5 data buses, 6 display screens, 7 scale fields, 8 grid points, 9 figures, 10 scales, 11 coordinate display fields, 12 display screens, 13 scales (rulers), 14
Scale scale, 15 cursors, 16 control box, 17, 18 changeover key, 19, 20, 2
1, 22, scroll key, 23 title bar, 2
4, 26 scroll area,

Claims (5)

[Claims] 1. A display device for displaying graphics and characters, an input device for inputting the graphics and characters, a storage device for storing input data and a program for processing the input data, the display device, and the input device. And a control device for controlling the storage device, the CAD system comprising: a display unit for displaying the ruler at a desired position by superimposing it on the display screen of the display device. . 2. The CAD system according to claim 1, wherein the ruler is graduated. 3. The CAD system according to claim 1, further comprising a scale changing unit that simultaneously changes the scales of the ruler and the graphic and the character displayed in a superimposed manner. 4. The CAD system according to claim 1, further comprising moving and rotating means for moving and / or rotating the ruler and / or the drawing. 5. The CAD system according to claim 1, further comprising drawing means for drawing along the ruler.