JP3018427B2 - Method and apparatus for processing graphic data having a hierarchical structure - Google Patents

Description

The present invention relates to a method and an apparatus for processing graphic data having graphic data having a hierarchical structure in a CAD system.

[Prior Art] Conventionally, in a CAD system, information such as figures is constructed in a unified data structure as a database. In the application software for drawing and the like using the data of such a database, not only each graphic element is handled in its own unit, but also as shown in FIG. 1 and FIG. Often treated as a simple aggregate. The data handled at this time is the third
Many have a hierarchical structure as shown in the figure. However, in order to express these hierarchical structures, the database itself needs to have a hierarchical structure, but such a system usually requires a huge number of programs.

Therefore, as a method of expressing a hierarchical structure with a relatively simple program, there is a concept of grouping graphic information. In this method, a plurality of graphic elements are handled as a single graphic element (group), whereby individual graphic elements can be handled individually or in units of a system level.

[Problems to be Solved by the Invention] However, when grouping is performed in this way, when changing the data content (for example, line segment color, line type, etc.) for each graphic element, Since it is recognized as a single figure called a group, changing the data of each figure element alone is very time-consuming and requires management of which figure element belongs to which group by application software.

The present invention solves the above problem, and in a CAD system that operates with a relatively simple program,
By grouping the hierarchized graphic data and having the group information, it is possible to perform a search for each graphic element alone by an easy operation, and to easily change and edit the data content at the graphic element level. It is an object of the present invention to provide a method and an apparatus for processing graphic data having a hierarchical structure capable of processing.

Means for Solving the Problems To achieve the above object, an invention according to claim 1 is a method for processing graphic data in a drawing creation CAD system having a hierarchical data structure. Collects a plurality of graphic elements and divides them into a plurality of hierarchized groups. Each group includes, as group information, the number of graphic elements belonging to the group, information on the hierarchy to which the group belongs, and the next group. And the head information of the graphic element, and when performing the data content change / edit processing at the graphic element level, the graphic element is searched without releasing the hierarchical group, and the processing is performed. To do.

According to a second aspect of the present invention, in the above, each of the plurality of hierarchized groups comprises a system, a single level, and each level of a graphic element, and each graphic element of the group information has information indicating the next graphic element. Things.

According to a third aspect of the present invention, there is provided a graphic data processing apparatus in a drawing creation CAD system having storage means for storing a hierarchical data structure, wherein the data structure in the storage means includes a plurality of graphic elements. And dividing into a plurality of hierarchized groups, each group having, as group information, the number of configuration of graphic elements belonging to the group, information of the hierarchy to which the group belongs, information indicating the next group, Including the head information of the element, when performing data content change / edit processing at the graphic element level, search for the graphic element without releasing the hierarchical group,
The processing is executed.

[Operation] According to the above-described method or apparatus, each group has hierarchical information, so that the data contents can be changed / changed at the graphic element level.
When performing the editing process, the graphic element can be immediately picked and the desired process can be executed without going through the step of releasing the hierarchized group. In addition, when a figure is picked, if it has hierarchical information, it is recognized as a hierarchical group, and information of the graphic element of the group is read out, whereas if it does not have hierarchical information, it is recognized as a group graphic, Only the group information is read.

[Embodiment] A drawing creation CAD system that executes a method of processing graphic data having a hierarchical structure according to the present invention will be described below with reference to the drawings.

FIG. 4 shows a block configuration of the CAD system. This system consists of a main storage unit and a CP
The system consists of a system body consisting of U1, a ROM 2 for storing CAD programs and the like, and a RAM 3 serving as a work area for figure processing, and various input / output devices connected via an interface 4. As input / output devices, a hard disk (storage means) 5 storing various graphic data such as architectural drawings and constructing a database, a keyboard 6 and a mouse 7 for inputting various commands for drawing processing, etc., and displaying processed graphics. And a plotter 9 for plotting graphics on paper.
The hard disk 5 stores, in addition to ordinary data, information of a hierarchical data structure of the present invention as described below.
And stores it in RAM3.

FIG. 5 shows a hierarchical data structure. This data structure is divided into a plurality of groups, each of which is a set of a plurality of graphic elements. Each group includes, as group information, the number of configuration of the graphic elements belonging to the group, information on the hierarchy to which the group belongs, and the next group. And the head information of the graphic element. Each group is composed of a system of the concept of the hierarchical structure shown in FIG. 3 and a single level, or a level (hierarchy) including a single element and a graphic element. In the example of FIG.
Groups such as a, b, and c are shown. Also, each figure element in these groups has an ID indicating the previous and next (after) figure element
Have information.

Hereinafter, an operation procedure according to one embodiment of the processing of the graphic data in the hierarchical group according to the present invention will be described with reference to the flowchart of FIG.

Here, a process for changing the color of a line segment is shown. In the color change menu, first, any one of a system, a single unit, or a graphic element is selected as a target unit (# 1). When the system unit is selected, “All systems”
(# 2) If not, the figure is picked (# 3), and system information is obtained from the figure information (# 2).
4) Further, single information is obtained from the system information (# 5),
Further, a graphic element is obtained from the single information (# 6), and the color of the graphic element is changed (# 7). This change process is performed for all graphic elements (# 8, # 9). If it is all the systems in # 2, skip # 3 and # 4 and proceed to # 5.

When a single unit is selected in # 1, a figure is picked (# 11), single information is obtained from the graphic information (# 12), and a graphic element is obtained from the single information (# 13). Change the color (# 14). This change process is performed for all graphic elements (# 15).

When a graphic element is selected in # 1, a graphic is picked (# 21) and the color of the graphic element is changed (# 22).

In order to compare and explain the above-described embodiment and a case where a similar process is performed using data having a conventional hierarchical structure,
FIG. 7 shows a conventional flowchart. Conventionally, it is determined whether or not the system is the entire system regardless of the target unit selection (# 32, # 40, # 50). If the system is the entire system, the system is picked (# 33, # 41, # 51). If it is not all the systems, the above-mentioned pick is not performed, and when the system unit is selected, single information is obtained from the system information (# 35). When a single unit is selected, the system group is released (# 41-1), and single information is picked (# 41-2). If a graphic element is selected, the system group is released (# 52), it is determined whether it is all single (# 53), and if not, the single group is released (# 55) and the graphic element is picked. Yes (# 56). Then, after each pick, the color change processing of the graphic element is performed.

Further, after each color change process, the process of regenerating the group is required for the one in which the group is deleted first (# 46, # 58, # 59).

The difference between this conventional processing procedure and the above-described processing procedure of the present embodiment in FIG. 6 is remarkable when a graphic element or a single unit is selected. Conventionally, since a graphic element cannot be directly searched for in the past, a processing for releasing each group information and a processing for regenerating each group information are required, and the processing operation is extremely complicated. On the other hand, according to the present embodiment, the operation and processing when a graphic element is selected are extremely simple, and the processing time is shortened.

FIG. 8 conceptually shows how to obtain the system information by the hierarchical group in the above-described embodiment. This corresponds to the process of # 4 in FIG. FIG. 9 (a)
(B) conceptually shows a method of obtaining each graphic element from the system information and hierarchical information, which is common to the present embodiment and the conventional example, and includes the processes of # 5 and # 6 in FIG. This corresponds to the process of # 35 in FIG. In these figures, the system information is represented by P, the independent information is represented by A and B, and the graphic information is represented by a1, a2,... A4, b1, b
2,... B4, and the numbers in parentheses indicate the order of processing.

In addition, when a figure is picked, if it has hierarchical information, it is recognized as a hierarchical group, and information of the graphic element of the group is read out, whereas if it does not have hierarchical information, it is recognized as a group graphic, Only the group information is read.

In the above-described embodiment, the case where the color is changed has been described. However, similar effects can be obtained by applying to changing and editing various graphic elements and the like.

[Effect of the Invention] As described above, according to the first aspect of the present invention, in a system using a relatively short program, hierarchical graphic data is grouped and group information is provided. In particular, when changing data for each graphic element alone, it is possible to easily search the graphic element in hierarchical units with a small number of operations, and to easily change and edit the data content at the graphic element level. Can be.

Further, according to the second aspect of the present invention, the search process is performed quickly, and efficient work can be performed.

[Brief description of the drawings]

FIG. 1 is a diagram showing an example of a system level as an aggregate of graphic data, FIG. 2 is a diagram showing an example of a single level, FIG. 3 is a conceptual diagram of a hierarchical structure of data, and FIG. FIG. 5 is a block diagram showing an example of a hierarchical group according to the present invention, FIG. 6 is a flowchart showing a processing procedure when changing a graphic element, and FIG. FIG. 8 is a diagram conceptually showing a method of obtaining system information in the present invention, and FIGS. 9 (a) and 9 (b) obtain respective graphic elements from conventional and system information of the present invention. It is a figure which shows a method and a hierarchical structure notionally. 1 ... CPU, 3 ... RAM, 5 ... Hard disk, 6 ...
Keyboard, 7 ... Mouse, 8 ... Display.

──────────────────────────────────────────────────続 き Continuing on the front page (72) Inventor Hiroshi Furuse 1304 Kanaokacho, Sakai-shi, Osaka Daikin Industries Co., Ltd. Sakai Plant Kanaoka Plant Examiner Takehiko Maki (58) Field surveyed (Int. Cl. ⁷ , DB Name) G06T 1/00 G06F 17/50 JICST file (JOIS)

Claims (3)

(57) [Claims] 1. Creation of a drawing having a hierarchical data structure
In the method for processing graphic data in a CAD system, the data structure is configured by assembling a plurality of graphic elements and dividing into a plurality of hierarchized groups. Number and
Gives the information of the hierarchy to which the group belongs, the information indicating the next group, and the head information of the graphic element, and releases the hierarchical group when changing / editing the data content at the graphic element level A method of processing graphic data having a hierarchical structure, characterized in that the graphic element is searched and the processing is executed without performing the processing. 2. The method according to claim 1, wherein each of the plurality of hierarchized groups is composed of a system, a single level, and each level of a graphic element, and each graphic element of the group information has information indicating the next graphic element. Item 3. A method of processing graphic data having a hierarchical structure according to item 1. 3. A graphic data processing device in a drawing creation CAD system having storage means for storing a hierarchical data structure, wherein the data structure in said storage means is a set of a plurality of graphic elements, Is divided into a plurality of hierarchized groups, and each group includes, as group information, the number of graphic elements belonging to the group, information on the hierarchy to which the group belongs, information indicating the next group, and the top of the graphic element. A hierarchy that includes information and searches for the graphic element without canceling the hierarchized group when performing data content change / edit processing at the graphic element level, and executes the processing. Processing device for graphic data with a generalized structure.