JP2001357077A - Cad system - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a CAD system capable of automatically detecting/ displaying the overlap of the line segment of a graphic form and character and speedily performing correction processing thereof. SOLUTION: This CAD system has a plotting processing means 2 for plotting the graphic form on the screen of a display device 1 on the basis of graphic data and displaying the character on the screen of the display device 1. A graphic form/character overlap detecting means 3 checks the state of overlapping of the line segment of graphic form and the character displayed on the display device 1 and when the graphic form/character overlap detecting means 3 detects an overlap of the line segment of graphic form and character, at least any one of the line segment and the character in that overlapping state is emphasized and displayed by an overlapped character emphasis displaying means 4.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

[0001] 1. Field of the Invention [0002] The present invention relates to a CAD (Computer Aided Design) system, and more particularly to a CAD system for detecting and displaying, when a CAD editing operation is performed, when a line segment of a graphic and a character overlap.

[0002]

2. Description of the Related Art When performing architectural design or mechanical design using a CAD system, various graphic data are input to draw a graphic, and dimensions of each part of the graphic are adjacent to a line of the graphic. Alternatively, character data such as a part name may be input.

[0003]

The character data is drawn and
Although it is common to arrange them in the vicinity of the line segment of the edited graphic, it is necessary to avoid a display in which the character and the graphic line segment overlap each other. For this reason, after inputting a character and editing the character, the CAD operator visually checks the overlap between the line segment of the figure and the character while looking at the display screen. , Correct its position. However, in the case of a CAD drawing in which a very large number of characters are edited and input adjacent to a line of a complicated figure, such as a display of dimensions of a mechanical part, the line between the figure and the character is displayed from the display screen. The work of finding the overlap has been an extremely burdensome work for the operator.

[0004] The present invention has been made in view of the above points, and automatically detects the overlap between a line segment of a figure and a character.
C that can be displayed and the correction process can be performed quickly
It is intended to provide an AD system.

[0005]

In order to achieve the above object, a CAD system according to the present invention draws a graphic on the screen of a display device 1 based on graphic data, as shown in the block diagram of FIG. In a CAD system having a drawing processing unit 2 for displaying a character on the screen of the display device 1, a graphic / character overlap detecting unit 3 for detecting an overlap between a character line segment and a character displayed on the display device 1; When the graphic / character overlap detecting means 3 detects an overlap between a graphic line and a character, an overlapping character highlighting means 4 for highlighting at least one of the line and the character in the overlapping state.
And characterized in that:

Here, the figure / character overlap detecting means 3
An overlap state can be detected by comparing coordinate data of a line segment for causing the display device 1 to display a graphic in the drawing processing unit 2 and coordinate data of a character for displaying a character on the display device 1. .

In the overlap detection mode for detecting the overlap between a drawn figure and a character, all the drawn figures and characters on the screen are displayed in gray, and the figure / character overlap detecting means 3 detects the figure line and the segment. When an overlap with a character is detected, the overlapped character highlighting means 4 can be configured to change at least one of the overlapping line segment and the character from gray display to colored display to perform highlight display. .

[0008]

In the CAD system having the above-described structure, a figure is drawn, and in a state where necessary characters are input on the screen, an overlap between the drawn figure and a character is detected by, for example, clicking a menu bar on the screen. Enter the overlap detection mode. In the overlap detection mode, all the drawn figures and characters on the screen are changed from, for example, normal black display to gray display.

In this state, the figure / character overlap detecting means 3
Operates, and the overlap between the line segment of the figure and the character is checked by comparing the coordinate data of the line segment and the character. When the graphic / character overlap detecting means 3 detects the overlap between the graphic line and the character, the overlapping character highlighting means 4 displays both the line and the character in the overlapping state, or either the line or the character. Is highlighted. This highlighting is performed, for example, by changing the display of characters and the like from gray display to colored display. As a result, the line segment and / or character of the overlapping graphic are highlighted, so that the operator can very easily find the overlap between the graphic and the character by looking at the screen display. Then, subsequent operations such as character movement correction can be performed quickly.

[0010]

Embodiments of the present invention will be described below with reference to the drawings. FIG. 2 shows a lock diagram of a schematic configuration of the CAD system. The CAD system is basically composed of a computer terminal as a main part. Reference numeral 5 denotes a drawing processing unit corresponding to the drawing processing means, and executes drawing processing by performing various arithmetic processing and the like accompanying editing of graphic data and the like. CPU 6, a RAM 7 for temporarily storing graphic data, character data, and the like, a storage device 8 such as a hard disk device for storing drawn graphic data, character data, and the like, and a ROM 9 for previously storing fixed data. . 1
Reference numeral 0 denotes an input device such as a keyboard and a mouse connected to the drawing processing unit 5.

The RAM 7 functions as a retain buffer memory for temporarily storing and holding graphic data, character data, and the like when editing figures and characters. The CPU 6 specifies the graphic data, character data, and the like in the RAM 7 when editing CAD. Stored in the area, and according to the operation of the input device 10 by the operator,
A process of rewriting graphic data, character data, and the like in the RAM 7 while performing arithmetic processing is performed. The graphic / character overlap detecting means 3 for detecting the overlap between the line segment of the graphic and the character corresponds to the function of the CPU 6.

The graphic data is composed of coordinate data indicating the position of each line segment constituting the graphic, and attribute data indicating the color, thickness, monochrome gradation (gray gradation), etc. of the line segment. It consists of data, coordinate data indicating a position, and attribute data (character font, color, size, black and white gradation, etc.). Lines and characters of figures displayed on the screen are
The CPU 6 changes the color or the grayscale of these attribute data to perform gray display or emphasized display. The above-described overlapping character highlighting means 4 for highlighting the lines and characters of the graphic corresponds to the function of the CPU 6.

Reference numeral 11 denotes a display controller connected to the display output side of the drawing processor 5. This display controller 1
1 has a bitmap memory 12 composed of a video RAM or the like, and storage elements corresponding to each pixel of a screen displayed on the display device 1 are provided. CPU of drawing processing unit 5
Reference numeral 6 denotes a bitmap memory 1 for storing data for screen display based on graphic data and character data created on the RAM 7.
2 and the control unit of the display controller 11 inputs the display RGB data read out from the bitmap memory 12 to a D / A converter and converts it into an analog signal. And the like, and the CAD drawing is displayed on the display device 1.

Next, the graphic / character overlap detection processing performed by the CAD system will be described with reference to the flowchart of FIG.

In the CAD editing operation, the CPU 6 reads, for example, graphic data and character data stored in the storage device 8 onto the RAM 7 in accordance with an operation of the input device 10 by the operator, and reads the graphic data and character data. Modified and added. At that time, the CPU 6
7, the screen display data is written into the bitmap memory 12 based on the graphic data and character data created on the display 7, and the control unit of the display controller 11 converts the display RGB data read from the bitmap memory 12 into A
Input to a converter and convert it to an analog signal.
The B signal is output to the display device 1 such as a CRT together with the synchronization signal, and the drawing being edited is displayed on the display device 1. In the drawn drawing, characters such as the size and name of the portion are input adjacent to the line segment of the figure. Normally, the lines and characters of the figure are displayed in black on the screen of the display device 1 as shown in FIG.

At the end of such an editing operation or the like, when checking the overlap between a line segment of a figure and a character, the operator inputs the command by, for example, clicking a menu bar on the screen or the like. The process proceeds from step 100 to step 110 to enter an overlap detection mode for detecting overlap between a line segment of a drawn figure and a character.

When the overlap detection mode is entered, in step 110, the line segments and characters of all the figures drawn on the screen of the display device 1 are changed from the normal black display to the gray one as shown in FIG. Changed to display. On the other hand, in the normal state when the mode is not the overlap detection mode, steps 100 to 160
To display the normal display in which the line segments and characters of all the figures are displayed in black. The line segment of the figure and the gray display of the character
6 is performed by changing the display color of all the attribute data in the graphic data and character data on the RAM 7 to gray gradation.

Next, in step 120, the CPU 6 determines whether or not all the characters displayed on the screen overlap with the line segments of the graphic. The determination of the overlap between the line segment of the figure and the character is performed by comparing the coordinate data of all the characters with the coordinate data of all the line segments. Then, when there is a character that overlaps with a line segment of the graphic, or when there is a line segment of a graphic that overlaps with the character, the CPU 6 proceeds to the next step 130 and replaces the character in the overlapping state with the character shown in FIG.
Highlighting is performed as shown in FIG.

This highlighting is performed, for example, by the CPU 6 rewriting the attribute data of the character data on the RAM 7 corresponding to the character from gray display to colored display. As a result, only the characters on the screen where the overlap occurs are displayed in color, for example, in orange or the like, and the operator can very easily find the character that overlaps the line segment of the figure by looking at the screen display. When the operator finds a character that overlaps the line segment, the operator operates the input device 10 to move the character to a position that does not overlap the line segment, thereby eliminating the overlap between the line segment and the character.

As described above, when the overlap between the line segment of the figure and the character is eliminated, the CPU 6 determines in step 140 that the overlap between the line segment of the character and the graphic has been eliminated, and proceeds from step 140 to step 150. Then, as shown in FIG. 4D, the color display of the character whose overlap has been eliminated is changed to a gray display. Then, returning to step 100, by repeatedly executing steps 100 to 150, the characters highlighted and overlapped with the line segment are moved and corrected, and the highlighted characters are sequentially returned to gray display.

Then, when all the overlaps between the graphic line segments and the characters are eliminated and steps 100 to 120 are repeated, as shown in FIG. 4D, all the graphic line segments and the characters become gray. Display. Thus, the operator can confirm that the overlap between the line segments of all the figures and the characters has been eliminated. In this state, the operator exits the overlap detection mode by inputting a command such as a click on the menu bar and the like. Then, the mode is changed to the normal mode, and the line segments and characters of the graphic are returned to the black display.

As described above, in the overlap detection mode, a character overlapping with a line segment of a figure is highlighted and displayed.
By looking at the screen of the display device 1, the operator can very easily find the character overlapping the line segment, and can quickly correct the movement of the character.

It should be noted that the present invention is not limited to the above embodiment, but can be implemented in the following modes.

When entering the overlap detection mode, all the line segments and characters of the figure are changed from black to gray display. However, it is not always necessary to change to gray display, and black display may be maintained.

If the line segment of the figure and the character overlap,
Although the character is highlighted, the line segment can be highlighted, or both the character and the line segment can be highlighted.

Although the coloring is used for the highlighting,
In a state where all the line segments and characters are displayed in gray, overlapping characters and line segments can be displayed in black and highlighted.

[0027]

As described above, according to the CAD system of the present invention, when a line segment of a graphic overlaps a character, both the line segment and the character in the overlapping state, or the line segment or the character Is configured to highlight either one of
The operator can very easily find the overlap between the graphic line and the character by looking at the screen display of the display device, and can quickly perform operations such as correction of the movement of the character thereafter.

[Brief description of the drawings]

FIG. 1 is a block diagram corresponding to the configuration of the claims of the present invention.

FIG. 2 is a configuration block diagram of a CAD system showing an embodiment of the present invention.

FIG. 3 is a flowchart showing an operation of the CAD system.

FIG. 4 is an explanatory diagram of a screen display.

[Explanation of symbols]

 1-display device 2-drawing processing means 3-graphic / character overlap detecting means 4-overlapping character highlighting display means 5-drawing processing unit 6-CPU 7-RAM

 ────────────────────────────────────────────────── ─── Continuing on the front page (72) Inventor Katsushi Sano 1-252, Kosha, Meto-ku, Nagoya-shi, Aichi 1F Building 2F, Keynos Logic Co., Ltd. F-term (reference) 5B046 DA02 FA09 HA09 5E501 AC09 BA09 CA03 FA13 FA14 FA46 FB28 FB44

Claims (3)

[Claims] 1. A CAD system comprising drawing processing means for drawing a graphic on a screen of a display device based on graphic data and displaying characters on the screen of the display device. Figure / character overlap detecting means for detecting overlap between a line segment of a figure and a character, and a line segment which is in an overlapping state when the figure / character overlap detecting means detects an overlap between a line of the figure and a character. And overlapping character highlighting means for highlighting at least one of the characters. 2. The graphic / character overlap detecting means includes: coordinate data of a line segment for causing a graphic in the drawing processing means to be displayed on the display device; and coordinate data of a character for displaying a character on the display device. 2. The CAD system according to claim 1, wherein an overlap state is detected by comparing the overlap state. 3. In an overlap detection mode for detecting overlap between a drawn figure and a character, all the drawn figures and characters on the screen are displayed in gray, and the figure / character overlap detecting means detects a figure segment and a line segment of the figure. 2. An overlapping character highlighting means for highlighting by changing at least one of a line segment and a character in an overlapping state from gray display to coloring display when an overlap with a character is detected. CA described
D system.