JPS6375880A - Graphic modification processing system - Google Patents

Abstract

PURPOSE:To improve the work efficiency of graphic processing by automatically processing the updating of a graphic data in case a graphic on the display screen is modified in a graphic displayer that holds a graphic data in a form of tree constitution. CONSTITUTION:To modify a graphic, if a graphic on the display picture and a modification specification are inputted, a correction processing part 21 refers to a graphic correspondence table 22 by using the kind of an original graphic and the correlative position relation between the said graphic and the modified part, and determines the data constitution of the graphic to be generated as a result of correction processing by selecting it from the graphic correspondence table 22. For thus determined data constitution, necessary values such as the name of the graphic, its coordinate values, etc. are set, a new partial tree constitution data is thereby generated, then the partial tree constitution of the specified graphic in a graphic data 12 is substituted with the said new one. The graphic data is thus updated.

Description

[Detailed Description of the Invention] [Summary] This is a processing method that automatically updates tree structure data representing a composite figure in accordance with a partial change in the figure.

A means is provided for specifying the structure of tree-structured data representing figures obtained by changing parts of various figures, and when changing the parts requires a change in the structure of the data, the tree-structured data indicating the new figure is configured according to the specification. Generate according to the configuration and update the tree structure graphic data accordingly.

With this method, automatic updating of tree-structured graphic data can be easily processed.

[Industrial application field]

The present invention provides a processing method for updating tree-structured figure data when a figure is changed in a figure display apparatus. It may be specified by data.

[Conventional technology]

FIG. 3 (al shows an example of a composite figure and its tree structure data.

The left side of the figure shows a composite figure Z consisting of a polygonal line X consisting of line segments 1, 2, 3 and a circle Y having a circumference 4, and the line segment has end points A, B, C, and D.

The right side of the figure conceptually shows the tree structure data indicating the composite figure Z. By using the composite figure Z as the root node and connecting the polyline X and the circle Y as lower nodes, the composite figure Z is This shows a configuration relationship consisting of Y.

Similarly, line segments 1.2, .
The configuration of the polygonal line X is shown at the node No. 3.

Furthermore, taking line segment 1 as an example, line segment 1 is determined by specifying the coordinates on the display screen, etc. of the node information of end points A and H connected to ) and - of line segment 1. .

In addition, in the case of a circle Y, the circumference 4 that defines its outline
The tree-structured data is composed of a node and an internal badan node that defines a pattern to be filled inside, and each node is defined in more detail.

The information for each node is the name of the graphical element corresponding to the node (
Composite figure Z, polyline Tree-structured data is constructed using a well-known list structure or the like in which memory words are connected using pointers.

FIG. 4 is a block diagram showing an example of the configuration of a graphic display device.

The display processing unit 11 of the graphic display device 10 searches the tree-structured graphic data 12 as described above, generates display control information from the basic graphic data in the lower nodes, and generates display control information on a display unit such as a CRT display device. 13, the composite figure can be displayed on the screen of the display unit 13.

In order to modify such a complex figure, a method for facilitating the operation of specifying some of the figures constituting it on the screen has been proposed in a patent application filed by the present applicant (Japanese Patent Application No. 6L-1122).
60).

According to this method, the cursor displayed on the screen of the display unit 13 is moved to the vicinity of a desired display figure based on input information from the input unit 14 consisting of a keyboard, a mouse, etc., and then the type of figure (polyline, By inputting information specifying a line segment, circumference, etc., from a keyboard or the like, the specified type of figure closest to the cursor is searched from the figure data.

This control, for example, controls the movement of the cursor by the cursor processing unit 1.
5, and when graphic type designation information is input, the graphic determining section 16 receives and processes this information.

The figure determining unit 16 receives the cursor position coordinates from the cursor processing unit 15, and if a polygonal line is specified, for example, scans the node of the line segment in the figure data 12,
By calculating the line segment closest to the cursor and going up the tree structure of the graphic data 12 from that line segment node, it is possible to determine the polygonal line that includes the line segment.

Next, when deletion is specified from the input section 14, the correction processing section 1
7 deletes the node corresponding to the figure determined by the figure determination unit 16 from the figure data 12 and the lower nodes connected thereto.

The display processing unit 11 deletes the displayed graphic according to the above update data, thereby deleting the graphic.

[Problem that the invention seeks to solve]

When processing shapes, generally, rather than completely deleting the component shapes, half or the middle part of the line segment is removed, a part of the circumference is removed to make it an arc, or one side of a triangle is removed. Or, it is often necessary to make changes such as erasing part of the line and making it a polygonal line.

In such a case, instead of simply removing the subtree structure of the tree-structured graphic data as described above, it is generally necessary to change the structure, such as changing node names and other changes, and setting new branch techniques.

For this reason, in the past, when changing a figure like this, the figure data was not automatically changed, and the changed figure data had to be created and input, making the change process time-consuming. There was a problem that work efficiency was poor due to the long display confirmation cycle.

[Means for solving problems]

FIG. 1 is a block diagram showing the configuration of the present invention.

The figure shows the configuration of a graphic display device 20, in which 11 is a display processing unit that displays graphic data 12 on a display unit 13, 14 is an input unit, and 15 is a display unit that moves a cursor display according to specified information from the input unit 14. 16 is a figure determining unit which determines a specified figure close to the cursor position based on specification information from the input unit 14;
Reference numeral 21 denotes a correction processing section that executes specified correction processing on the specified display figure determined by the figure determination section 16, and also uses the figure correspondence table 22 to modify the figure data 12 corresponding to the figure correction.

[For production]

When changing a figure, when the figure on the display screen and the change specification are input in an appropriate manner, the correction processing unit 21 uses the type of the original figure and the relative positional relationship between the figure and the changed part.
The figure correspondence table 22 is indexed, and the data structure of the figure to be generated as a result of the modification process is determined from the table.

For the determined data structure, new subtree structure data is generated by setting required values such as the figure name and coordinate values, and by replacing the subtree structure of the specified figure in the figure data 12, the figure data Update.

As described above, automatic update processing of graphic data corresponding to a partial change in a graphic can be realized relatively easily.

〔Example〕

In FIG. 1, the display processing section 11 of the graphic display device 20,
It is assumed that the display section 13, input section 14, cursor processing section 15, and graphic determination section 16 have the same functions as those of the conventional graphic display device 10.

When deleting a part of a figure, after specifying the figure on the display screen using the cursor and specified input as described above, place the cursor at an appropriate position and, for example, use the input section 14 to
Specify "partial deletion". Alternatively, you can combine both specifications with “
You may also be able to specify something like "delete arc".

The correction processing unit 21 is located on a line such as a line segment or arc (hereinafter referred to as a display line) of a specified figure, and is specified by an end point, intersection, or vertex close to the cursor on the screen, or by coordinate values input separately. A specified point is searched from the graphic data 12.

Among these points, for example, the two points closest to the cursor are determined by placing the cursor between them, and a line on the display line (hereinafter referred to as a designated line) limited by those two points is determined to be a partial figure to be deleted. .

Next, the type of display line (specified shape) (line segment, polyline,
Corresponding designation information is indexed from the graphic correspondence table 22 based on the relative positional relationship between the display line and the designated line (deleted portion) (circle, arc, triangle, etc.) and the designated line (deleted portion).

The figure correspondence table 22, for example, as shown in the conceptual structure in FIG. The third data structure field is configured to specify the structure of the subtree structure data of the figure as a result of deletion.

The relative position in the relative position column is indicated by a solid line indicating a display line and a broken line indicating a designated line, and the information that needs to be expressed here is the positional relationship of the end points of the drawing lines indicated by small circles in the figure.

For example, in the second case of the display figure "line segment", specify in the relative position column that both end points of the specified line are inside the end points of the display line, that is, the middle of the display line is deleted,
In that case, it is specified in the data structure column that the subtree structure of the "line segment" is divided into two.

The correction processing unit 21 generates new subtree structure data by setting required values such as the figure name as a result of deletion processing and the coordinate values of end points to the specified subtree structure data obtained from the figure correspondence table 22. Then, by replacing the subtree structure of the specified figure in the figure data 12, the figure data is updated.

The situation in which the graphic data 12 is updated will be explained by taking as an example the case where the composite graphic Z in FIG. 3(a) is modified.

By placing the cursor (indicated by a + sign in the figure) at the position shown in Figure 3(a) and specifying, for example, "delete arc," circle Y is designated, and circle Y and line segment 1 and line segment 3
The two intersections with .

Now, from the figure correspondence table 22 of the contents of Figure 2, the item in the display figure column "Circle" is indexed, and the subtree structure of the arc is specified in the data structure column. ) The graphic data is changed as shown on the right side.

Next, place the cursor at the position shown in Figure 3(b) and specify "Delete Line Segment." Line segment 1 is determined to be the display line, and the line between end points A and E is determined to be the specified line, and as shown in Figure 3(b), The graphic data and figure are changed as shown in (C).

By the same operation, the graphic data and figure are changed from TC) to (d) in FIG.

In the above explanation, we talked about deleting part of a figure, but
Adding a graphic part can be similarly processed by providing a graphic correspondence table for addition, for example.

The above-mentioned figure correspondence table is prepared in advance in the figure display device for basic figures, etc., and also for special figures defined by the user, such as when a part of a star shape is deleted, it becomes a polygonal line, etc. If specification information can be registered, this method can be used more effectively.

〔Effect of the invention〕

As is clear from the above description, according to the present invention, in a graphic display device that holds graphic data as tree-structured data, when a graphic on the display screen is modified, the graphic data is automatically updated. This has a significant industrial effect of improving the work efficiency of graphic processing.

[Brief explanation of the drawing]

Fig. 1 is a block diagram showing the configuration of the present invention, Fig. 2 is an explanatory diagram of a figure correspondence table, Fig. 3 is a diagram showing an example of compound figures and tree structure data, and Fig. 4
The figure is a block diagram of a conventional configuration example. In the figure, 10.20 is a graphic display device, 11 is a display processing unit, 12 is graphic data, 15 is a cursor processing unit, 16 is a graphic determination unit, 17.21 is a correction processing unit, and 22 is a graphic correspondence table according to the present invention. Block diagram showing the configuration Fig. 1 Block diagram of a conventional configuration example Fig. 4 Explanatory diagram of figure correspondence table

Claims (1)

[Scope of Claims] Information defining a complex figure is provided as tree structure data in which the complex figure is the root node and the component figures of the figure of the upper node are successively lower nodes, Graphic display device (20) that displays graphics on a display screen
means (22) for specifying the structure of tree structure data indicating new figures obtained by changing parts of various figures; and means (22) for specifying the structure of tree structure data indicating new figures obtained by changing parts of various figures; A figure changing processing method comprising means (21) for generating a configuration specified by a specifying means and for updating tree structure data indicating the composite figure using the generated information.