JPS61286977A - Partial deforming system for graph in graph forming device - Google Patents

Abstract

PURPOSE:To partly deform a graph by adding or deleting a desired sequence of points with respect to the sequence of points defining a state of the graph displayed on a display and displaying the graph based on the result. CONSTITUTION:When two points 8 applying a deformation between points among sequence of points defining a graph with respect to said graph 7 dis played on a display 3 are designated by the designation from an input device 5, a CPU 2 registers the points 8 in a point pick table of a file 1. Thereafter, when the sequence of the points to be added between the points 8 is designated or the sequence of the points to be deleted between the points 8 is designated, the data change for adding or deleting the sequence of the points with respect to the graphic data of the file 1 corresponding to the graph 7 is carried out based on the designation. The display 3 displays the graph according to the changed graph, thereby the graph displayed on the display 3 is partly changed.

Description

[Detailed Description of the Invention] [Field of Application of the Invention] The present invention is a figure creation device for partially transforming a figure for presentation/teaching, such as a created illustration diagram, block diagram, explanatory diagram, etc. The present invention relates to a method for partially deforming figures.

[Background of the invention]

When an amateur who is not an illustrator draws a figure using a figure creation device (including an information processing device, etc.), the problem is that he or she cannot draw the figure without a model. For this reason, methods of storing graphic models in a database are being considered. However, if you just use the model figures in the database as a cut, you will quickly get bored, and the database may not contain what you are looking for.

Therefore, it is conceivable to create the desired shape by transforming such a model drawn figure as desired. However, for this purpose, there must be some method for transforming the figure, which is used in the figure creation device.

Conventionally, CAD is the method of transforming shapes.
As is often done in (Computer Aided Design), the entire figure is subjected to affine transformation (by multiplying the point coordinates of each point on the figure by an affine transformation matrix and moving that point, the entire figure is translated twice, enlarged, (For details, see "Graphic Processing Engineering Using Computer Displays" by Yamaguchi, PP of Nikkan Kogyo Shimbun.)

65-91, 1981), or ASCII's Bernal aΦ System CANDY (For details, see ASCII's Personal OΦ System CANDY
There was a method of deforming a polygonal line figure by moving only one vertex of the figure, as shown in the catalog of J.

However, in the former case, the entire figure can only be transformed within the range of affine transformation;

It was not possible to deform part of the nonlinearly.

On the other hand, in the latter case, the target figure to be transformed is limited to a broken line figure, and the transformation of the figure is limited to the movement of only one vertex.

Furthermore, it is not possible to transform a figure by adding or deleting vertices, and the range of partial transformation of the figure is also limited.

[Purpose of the invention]

The purpose of the present invention is to solve the problems of the prior art described above,
To provide a partial deformation method for a figure that can non-linearly transform the figure by partially adding or deleting the figure without limiting the target figure.

[Summary of the invention]

In order to achieve the above-mentioned object, the present invention uses a figure creation device that creates figures, including figures displayed on a display (including broken line figures, polygon figures, figures approximated by splines).

You can partially transform a shape by adding or deleting a desired point sequence to the point sequence that defines the shape (including filled shapes, etc.) and displaying the shape based on the result. This is what I did.

[Embodiments of the invention]

An embodiment of the present invention will be described below with reference to the drawings.

FIG. 2 is a block diagram showing a graphic creation device used to implement the present invention.

In FIG. 2, 1 is a file that stores operating programs and graphic data, 2 is a central processing unit (hereinafter referred to as CPU), 3 is a display for displaying created figures and transformed figures, 4 is a keyboard, and 5 is a pointing input device.

In this embodiment, in the figure creation device having the configuration shown in FIG. By specifying two points related to a location and deleting a point sequence between them or adding a new point sequence between them, the shape of the figure is partially transformed.

FIG. 3 is a perspective view showing a user partially deforming a figure using the second figure figure creation device.

In FIG. 3, 6 is the user, 7 is the figure displayed on the display 3, and 8 is 2 of the dots that make up the figure 7.
9 is a line segment defined by two points 8, and the other numbers represent the same as in FIG. In this embodiment, in order to simplify the explanation, it is assumed that the figure 7 displayed on the display 3 is composed of broken lines connecting each point of a series of points with line segments, as shown in FIG. .

Now, in the figure creation device shown in Fig. 2, we first partially transform the figure by adding a new point sequence between two points that define one line segment of the figure. I will explain about it.

As a specific example, point 1 of figure 10 shown in FIG. 4 (α)
Let us consider the case where a new point sequence from point 21 to point 27 is added between point 1 and point 12, and the shape is transformed into figure 20 shown in FIG. 4(b).

Before explaining the processing operation in this case, the table used for this processing operation will first be explained.

FIG. 5 is a schematic diagram showing a graphic data table that stores graphic data of defined graphics.

Since the figure shown in this example is displayed as a line segment connecting ordered points as described above, it is defined by an ordered sequence of points. For this reason, in the graphic data table shown in FIG. 5, individual graphic data 30 are represented by attributes and coordinates of point sequences.

This figure data table is file 1 shown in Figure 2.
It exists within.

As shown in FIG. 5, the attributes include a flag 32 indicating whether the figure is valid or invalid, a record length 33 indicating the length of this figure data, a figure type 34 (in this case, it represents a polygon figure), a figure It consists of a color code 35 and a number (i) of 36 points. Also, the point sequence that defines the figure is the X coordinate of point 1, 3
7. X coordinate of point 1 38, ..., X coordinate of point 1 40
, the X coordinate of the point 41, and the number of points (x) 36 is stored. The figure 10 (see FIG. 4(eL)) displayed on the display 3 has 12 points 2. since the figure type 34 represents a polygon figure. ...2
It is expressed as a polygon formed by connecting dots with line segments.

FIG. 6 is a schematic diagram showing a point big table in which two points (constituting the R portion) specified for transformation by the user 6 are registered.

The point pick table shown in FIG. K) is stored to indicate whether it belongs. still,
In this respect, the big table also exists in the file 1, similar to the graphic data table shown in FIG.

Now, the processing operation in this embodiment will be explained using FIG. 1.

FIG. 1 is a flowchart showing processing operations in an embodiment of the present invention.

The CPU 2 shown in FIG. 2 performs processing operations in accordance with the processing procedure shown in FIG. 1 in accordance with the operating program stored in the file 1.

The process begins at block 60. First, the user 6 selects the figure 10 (Fig. 4 (α) displayed on the display 3).
)), decide between which point and which point the point sequence is to be added, and specify the two points, ie, point 11 and point 12, using the input device 5 (block 61). When the designation is entered, the CPU 2 stores the designated two points 11.1 in the point pick table (see Figure 6) in the file 1.
2, the figure name 50 and point number 51 are entered respectively (block 62). After completing this entry, CPU2
Specified points 1 in order to provide feedback to user B
1 and point 12 are displayed as special marks on the display 3 (block 63). Next, the CPU 2 allows the user 6 to determine whether the specified item is what the user 6 wanted by looking at the display, and based on this, the CPU 2 moves to block 61 again in order to request the user 6 to specify a point again. , or to proceed to the next block 65 (block 64).

In this way, when the points 11 and 12 desired by the user 6 are specified, the user 6 next specifies the point sequence (points 21 to 27) to be added between the points 11 and 12. Each coordinate is specified using the input device 5 while looking at the display 3 (block 65). When the designation is entered, the CPU 2 refers to the graphic data 30 representing the graphic 10 (see FIG. 4 (α)) stored in the graphic data table (see FIG. 5) in the file 1 based on it. Meanwhile, graphic data 31 is created in which the number 36 of points in the graphic data 30 and the coordinate values of the ordered point sequence are changed, and the graphic data 31
is written in empty area E of the figure data table (block 66). At the same time, the valid/invalid flag 32 of the figure in the figure data 30 is invalidated. This results in
The display 3 now displays the figure 20 in accordance with the written figure data 31 in the figure data table, and therefore the shape of the displayed figure 10 is deformed as shown in FIG. 4(b). (block 67)
.

Next, the CPU 2 causes the user dK to determine whether the shape modification operation of the figure is finished, and based on this, either returns to block 61 to have the user dK specify a point again, or
Determine whether to terminate (block 68). block 6
This process ends at 9.

The above is an explanation of the processing operation for partially transforming a figure by adding a new point sequence.

Next, a case will be described in which, in the figure creation apparatus shown in FIG. 2, a part of a figure is transformed by deleting a series of points between two specified points.

The processing operation in this case is almost the same as in the case of addition described above, so only the different parts will be briefly explained.

As a specific example, contrary to the example of addition mentioned above,
Figure 4(b) In the figure 20 shown by K, point 11 and point 1
Consider the case where the sequence of points from point 21 to point 27 between point 2 and point 2 is deleted and transformed into figure 10 shown in FIG. 4 (α).

In this case as well, the CPU 2 shown in FIG. 2 performs processing operations according to the processing procedure shown in FIG. 1 in accordance with the operating program stored in the file 1.

First, the user 6 displays on the display 5 j
While looking at the created figure 2 (1 (see Figure 4(b)), decide which points should be deleted between the points , and delete those two points, that is, points 11 and 12. It is designated using the input device 5 (block 61).The processing operations of the CPU 2 in response to this, from block 62 to block 64, are the same as in the case of addition described above.

In this way, when the points 11 and 12 desired by the user 6 are specified, the user 6 next selects the point sequence (points 21 to 27) to be deleted that exists between the points 11 and 12. and its respective coordinates using the input device 5 while looking at the display 3 (block 65).

The following processing operations for this are the same as those for the above-mentioned addition, so a description thereof will be omitted.

The above is an explanation of the processing operation for partially transforming a figure by deleting a sequence of points.

By the way, in the above description of this embodiment, the target figure was a polygon figure, but the figure can be similarly applied to a polygon figure defined by a sequence of points, a spline figure, and a filled figure in which a closed area is defined. Partial transformations can be made. This is because the shapes of these figures are determined only by the coordinates of point sequences, and the method used here is only adding and deleting point sequences.

〔Effect of the invention〕

According to the present invention, it is possible to partially add or delete a figure and transform it nonlinearly without limiting the target figure.

Furthermore, since partial transformation of a figure can be directly and easily performed on the display, even an amateur can draw a variety of figures.

[Brief explanation of drawings]

FIG. 1 is a flowchart showing processing operations in an embodiment of the present invention, FIG. 2 is a block diagram showing a graphic creation device used to implement the present invention, and FIG. FIG. 4 is a schematic diagram showing the shape before and after transformation is performed in the present invention, and FIG. 5 is a figure data table used in the present invention. FIG. 6 is a schematic diagram showing a point big table used in the present invention. 1...File, 2...Central processing unit, 3
...Display, 4...Keyboard, 5...
Pointing input device, 6...user. Figure 1 Figure 2 Figure 3 Figure 4 Figure 4 (α) (b) Figure 5 °121.7

Claims (1)

[Claims] 1) A central processing unit (hereinafter referred to as CPU);
a file that stores an operation program and graphic data defining the shape of the graphic as a sequence of points, a display that displays a graphic of specified graphic data among the graphic data in the file as an image, and an input device; In the figure creation device, two points between which deformation is to be applied to the figure displayed on the display from among a series of points defining the figure are set according to an instruction from the input device. When specified,
The CPU registers the two points in a point pick table in the file according to the operation program stored in the file, and then adds a point between the two registered points according to an instruction from the input device. When a point sequence to be deleted or a point sequence to be deleted between two points is specified, the point sequence is applied to the figure data in the file corresponding to the displayed figure based on the specification. The display is characterized in that the figure displayed on the display is partially transformed by changing the data for adding or deleting the figure, and the display displays the figure according to the changed figure data. A method for partially transforming figures in a figure creation device. 2) In the figure partial deformation method according to claim 1, the figure displayed on the display is a filled-in figure defined by a closed area boundary, and the figure is partially deformed. A method for partially deforming a figure in a figure creation device, characterized in that: