JP2001202392A - Cad system - Google Patents

Abstract

PROBLEM TO BE SOLVED: To easily recognize a non-displayed attribute change even when that change is performed concerning the element of a CAD drawing. SOLUTION: Concerning the respective data of a former version drawing fetched by load processing parts 51 and 52 and an edited drawing prepared by that former version drawing, the element data of the same cell number are extracted from two pieces of drawing data by a differential extracting processing part 53 and differential information is found while including non- displayed contents as well. Then, a color designated as 'change color' is set to an element, having the difference, and such an element is displayed on a CRT 6 by a display processing part 55. Besides, when the element displayed in the 'change color' is designated on that display picture, change contents are displayed by a 'balloon' or the like.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a CAD system and a modified drawing display method thereof, and more particularly to a CAD system and a modified drawing display method suitable for designing including the attributes of elements not displayed on a screen. About.

[0002]

2. Description of the Related Art In a recent CAD system, a difference between an edited drawing data and an old drawing data before the editing is displayed in different colors or the like so that a changed portion of the drawing can be easily found. ing. For example, Japanese Patent Application Laid-Open No. H10-312407 discloses a means for comparing edited drawing data with old edition drawing data by using bitmap information to extract a changed portion and change the display color to display the changed portion. Japanese Patent Application Laid-Open No. Hei 7-129463 discloses that each graphic on a screen includes coordinates and shape data of the graphic, "specific attribute data" (information specific to the graphic), and "content attribute data meaning drawing contents". A technique is disclosed in which such data is compared with a graphic before and after editing, differences are extracted, and the difference is marked with a mark determined according to the content of the correction and displayed. Further, JP-A-Hei 1
In Japanese Patent Application Laid-Open No. 1-53415, a change in connection line position in a circuit diagram of an electric / electronic circuit or the like is not regarded as a change, but only a change that is meaningful to a designer is extracted, and the corrected portion is surrounded by a cloud frame. A technique for displaying is disclosed.

[0003]

When designing any device or system in a CAD system, not only elements displayed on the screen but also attribute values not displayed on the screen are designated by the attributes of the elements. Sometimes. For example, when a connection line is displayed on a circuit diagram, the line width of the connection line is not always displayed on the screen. However, this line width is also necessary as circuit design information together with the displayed information. Therefore, when such non-display information is also changed when the drawing data edited on the CAD is changed, the designer needs to know whether or not such non-display information has been changed. However, in the means described in Japanese Patent Application Laid-Open No. H10-312407, since the changed portion is extracted by comparing the bitmap information of the display data, the attribute of the element not displayed on the CRT cannot be extracted as the difference information. In the technique disclosed in Japanese Patent Application Laid-Open No. Hei 7-129463, "unique attribute data" and "content attribute data" are compared in addition to the data relating to the display graphic itself. Information (like a number), not required for the system being designed. Further, there is no description that “content attribute data” means screen non-display data in design which is not displayed on the screen. Further, in Japanese Patent Application Laid-Open No. 11-53415, "attribute" is compared, but "attribute" referred to in this document is a character string displayed in a CAD drawing, and is also a screen non-display data. is not. Therefore, these conventional techniques do not have a function of detecting the change and notifying the designer, even if the design change accompanied by the change of the screen non-display data.

SUMMARY OF THE INVENTION It is an object of the present invention to provide a CAD system and a method for displaying a changed drawing, in which even if the attribute of an element which is not displayed is changed, a changed portion with respect to the old drawing data can be easily recognized. It is in.

[0005]

SUMMARY OF THE INVENTION The present invention relates to a CAD system for displaying difference information between an old edition drawing data and edited edition data created by modifying the old edition drawing data together with edited edition data on a CRT. Difference extraction processing means for extracting element data having the same cell number included in both data from the old edition drawing data and the edited drawing data, and extracting the difference between the two element data including the data which is not displayed; and Display processing means for changing the display color of the element on the edited drawing data from which the difference has been extracted to a "changed color" indicating "changed" and then displaying the change on a display means. Is disclosed.

Further, according to the present invention, when a display processing means specifies an element displayed in the "changed color" on a drawing displayed by the means, the difference extracted by the difference extraction processing means is displayed. A CAD system characterized by having a function of displaying the information on the display means.

[0007]

Embodiments of the present invention will be described below with reference to the drawings. FIG. 1 is a block diagram showing a configuration example of a CAD system according to the present invention, in which a keyboard 1, a mouse 2, and a CA input using the keyboard 1 and the mouse 2 are used.
Old version drawing database 3 that stores version D and revision data by storing D drawing data as old version drawing data, edited drawing database 4 that temporarily stores CAD drawing data that is currently being edited, and stores design and attribute information of elements. A drawing database 8 (hereinafter, abbreviated as DB) that integrally manages the element shape database 7 that has been processed, a processing unit 5 that performs editing processing, difference extraction, display processing, and the like, and a CRT 6. The processing unit 5 reads the old edition drawing data from the old edition drawing DB 3 and temporarily stores the old edition drawing data in a buffer.
4, an edited drawing load processing unit 52 for reading the edited drawing data and temporarily storing it in a buffer, comparing the respective information stored in the buffer, extracting the difference, and storing the difference in a difference information file 54 Processing unit 53,
A display processing unit 55 that combines the edited drawing DB 4 and the difference information file 54 to change the color of the changed part and issues a display instruction, and a color in which the display processing unit 55 defines color information for changing the color of the changed part. And a replacement explicit designation file 56.

FIG. 2 is an explanatory view of the configuration of the element shape DB7. FIG. 7A shows a basic form common to all the elements, and is a unique number assigned to each element, that is, an element number 201, a color number 20 for designating the element color (display color).
2. Consisting of shape data 203 as element attribute information. FIG. 2B shows that the shape data 203b of the element 20b used for displaying the electrical resistance and the like is obtained by determining the positions of the seven points of the bending point and both end points of the element 20b (some point, for example, one end point as a reference position). (Relative position). In FIG. 2C, the shape data 203c of the element 20c indicated by a circle includes the coordinates of the center position, the radius, the line width, and the line type. This element shape DB7 is used to create drawings
Used when editing.

FIG. 3 is an explanatory diagram of data stored in the edited drawing DB 4 in the order of creation when the drawing is created and edited using the element shape DB as shown in FIG. FIG.
(A) shows the basic form of this data, and cell number 3
01a is the order in which the elements were created. Element number 3
Numeral 02 denotes a number for recognizing which element is drawn and arranged in the drawing, and corresponds to the element number 201 in FIG.
The display position 303 is the coordinates in the drawing where the element is arranged (the coordinates of the reference position), and the color number 304 is the display color. The element attribute 305 is data input and set for the element. FIG. 3B shows the element 20b of FIG. 2B.
FIG. 2 is a data drawing of the element 30b by using FIG.
Same as that of (b), the display position is (Xb, Yb)
It is. Similarly, FIG. 3 (c) shows the device 20c of FIG. 2 (c).
FIG. 2 is a data drawing of the element 30c using FIG.
It is the same as that of (c), and the display position is (Xc, Yc)
It is. The element attributes 305b and 305c both have attribute items such as an appliance number, a model, a board number, a one-point terminal, and a two-point terminal, and each of these attribute items has a flag indicating whether or not to display it on the CRT 6.

Next, the operation of the CAD system shown in FIG. 1 will be described. FIG. 4 is a processing flow of the difference extraction processing unit 53. First, old-version and new-version drawing data read into a buffer by the old-version drawing loading unit 51 and the edited drawing loading unit 52 are fetched (steps 401 and 40).
2). Here, the drawing to be read is shown in FIG. 5A, and only the format of the element attribute of the element C5 is shown in FIG.
From “HS-1048” in (b) to “HS-108” in FIG.
1050 ", and the old version and the other drawing data after editing are exactly the same. Here, since the flag added before “HS-1048” or “HS-1050” in the format column in the attribute of the element C5 is “0”, these formats are displayed on the CRT 6 in both the old version drawing and the edited drawing. Not done.

Next, the difference extraction processing unit 53
01 and data of the elements having the same cell number that have not been compared yet are extracted from the old-version drawing data and the edited drawing data respectively fetched in step 402 (step 403). It is checked whether they are the same (step 404). This comparison is performed for all the element data other than the cell numbers shown in FIG.
If the two data are not the same, the contents of the change are extracted (step 405), and the difference information corresponding to the element is written to the difference information file 54 (step 406). If the two data are exactly the same in step 404, it is checked whether there is difference information for the cell number in the difference information file (step 407), and if there is, the information is deleted (step 408). In the example of the drawing data in FIG. 5, since the attribute related to the format of the element C5 of the cell number “2” is changed, the difference information as shown in FIG. -1050 "
Is a changed value.

When the processing in step 406 or 408 is completed, it is checked whether element data having the same cell number remains in the old version and the edited drawing data (step 409). If so, the process is terminated. Although omitted in the flow of FIG. 4, if there is an element included in the old edition drawing data or the newly edited drawing data and having a cell number that exists only in one of the elements, it is deleted or added by editing. In the element, it is assumed that the cell number and the element data of such an element are also written in the difference information file 54 as difference information. Such processing is well known in the art.

FIG. 6 is a processing flow of the display processing unit 55.
First, the edited drawing data is read (step 601), and it is checked whether or not difference information on the drawing data exists in the file 54 (step 602). If not, it is determined that the drawing has not been changed, and the edited drawing data is displayed on the CRT 6 as it is (step 607). If the difference information exists, the difference information is read from the file 54 (step 603), and the edited drawing data is associated with the difference information (step 604). Next, the color change specification file 56 in which the color information for the change content indicated by the difference information is defined is read, and the change content of the difference information diagram corresponds to the color, for example, red if the change is deleted, blue if added, and if moved. Green is determined, and if the attribute is changed, yellow is determined (step 605). Then, the color number representing this color is written in the color number of the element attribute of the corresponding element data (step 606), and then the changed graphic data is displayed on the CRT 6 (step 607). The processing of steps 603 to 606 described above is performed for all element data for which difference information exists. In the example of FIG. 5, since the format in the attribute is changed, the color number “3” of the color (yellow) indicating “attribute change” is set in the color number column in the difference information as shown in FIG. And displays it on the CRT 6 as shown in FIG. Then, the color of the element C5 is "black" of the normal display.
The color is changed from “color” to “yellow”, so that the operator can easily know whether or not there is a change in the element attribute that is not normally displayed.

Although not shown in FIG. 6, when a color number "3" indicating that the element has been changed is written in step 606, the display color of the element is changed. Since not all attributes are displayed, it may not be possible to know which attribute has been changed. The example in FIG. 5 is also an example. In such a case, for example, when the mouse is pointed at a changed element on the screen with a mouse, the difference information is checked, and the changed attribute is displayed in the form of a "speech balloon". The attributes can be easily displayed on the screen, and the convenience is further improved. If the color specification for the change content, that is, the color specification file 56 can be easily defined on the CRT 6 using a keyboard, it is easy to select an easy-to-use color classification method.

[0015]

According to the present invention, the changed portion of the edited drawing data with respect to the old drawing data is displayed in a different color regardless of whether the edited drawing data is displayed on the screen or not. In addition to notifying the operator of the presence / absence of the change, it is possible to easily determine whether the change is a change due to deletion, a change due to addition, a change due to movement, or a change due to correction.

[Brief description of the drawings]

FIG. 1 is a block diagram illustrating a configuration example of a CAD system according to the present invention.

FIG. 2 is an explanatory diagram of a DB configuration for managing element shapes.

FIG. 3 is an explanatory diagram of an element attribute cell configuration.

FIG. 4 is a processing flow showing an operation of a difference extraction processing unit.

FIG. 5 is a diagram showing a modified example of a CAD drawing according to the present invention.

FIG. 6 is a processing flow showing an operation of a display processing unit.

[Explanation of symbols]

 1 Keyboard 2 Mouse 3 Ver / Rev DB 4 Edit Drawing DB 6 CRT 7 Element Shape DB 51 Old Version Drawing Load Processing Section 52 Edit Drawing Load Processing Section 53 Difference Extraction Processing Section 54 Difference Information File 55 Display Processing Section 56 Color Change Specification File

 ──────────────────────────────────────────────────続 き Continued on the front page (72) Inventor Yukihiro Oda 5-2-1 Omikacho, Hitachi City, Ibaraki Prefecture Inside the Omika Works of Hitachi, Ltd. (72) Inventor Hiroshi Hayakawa 5-chome Omikamachi, Hitachi City, Ibaraki Prefecture No. 1 Inside Hitachi, Ltd. Omika Works (72) Inventor Susumu Miyagi 3-2-1 Sachimachi, Hitachi City, Ibaraki Prefecture Inside Hitachi Engineering Co., Ltd. (72) Inventor Takehiko Yanai Omika Town, Hitachi City, Ibaraki Prefecture 5-2-1, F-term (reference) in Omika Works, Hitachi, Ltd. 5B046 AA08 BA03 DA05 DA07 HA09 KA02

Claims (2)

[Claims] 1. A CAD system for displaying difference information between old edition drawing data and edited drawing data created by modifying the old edition drawing data together with edited drawing data on a CRT, wherein a same cell included in both the old edition drawing data and the edited drawing data is provided. Difference extraction processing means for extracting element data having a number from the old version drawing data and edited drawing data and extracting the difference between the two element data including data that is not displayed, and edited drawing data from which the difference is extracted by this means And a display processing means for changing the display color of the upper element to a "changed color" indicating "changed" and then displaying the change on the display means. 2. The information processing apparatus according to claim 1, wherein the display processing unit is configured to execute information on a difference extracted by the difference extraction processing unit when an operator specifies an element displayed in the “changed color” on the drawing displayed by the unit. The CAD system according to claim 1, further comprising a function of displaying on a display means.