JPH04252382A - Graphic drawing system - Google Patents

Abstract

PURPOSE:To reduce the inconvenience in a graphic drawing by switching the processings according to the number of times of consecutive position information inputs in the same area. CONSTITUTION:A position input part 2 inputting the position information, an end information input 3 inputting the end information indicating the segment of points constituting the graphic, and a processing part 1 drawing the graphic based on the end information and the graphic block point, are provided. In the processing part 1, according to the number of times of consecutive position information inputs in the same area, whether the input point is a graphic block point, or the graphic block point is set, or the position information is made invalid are decided and the processing is switched.

Description

[Detailed description of the invention]

0001

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a technique for simplifying data input work in a data processing apparatus that inputs/outputs, manipulates, and stores figures.

0002

[Prior Art] Conventionally, as shown in Japanese Patent Application Laid-open No. 61-262884, after inputting coordinates using a coordinate input device, when a circle that has already been created is designated by the coordinate input device, the coordinates are input to that circle. When a line segment that has already been created is specified, a straight line is drawn to the end point closest to the specified point.

0003

[Problem to be Solved by the Invention] In the above-mentioned conventional technology, when drawing a straight line connecting a point and a point other than the point of contact between a point on a previously created circle, or when drawing a straight line connecting a certain point and a point other than the end point of a previously created line segment, When drawing a line, it is necessary to input a separate command to indicate this, which is inconvenient for the user.

An object of the present invention is to alleviate the inconveniences in drawing graphics.

[0005]

[Means for Solving the Problems] The present invention switches processing depending on the number of consecutive inputs of position information in the same area.

[0006]

[Operation] According to the present invention, depending on the number of consecutive inputs of position information in the same area, the input point is set as a figure constituent point, or the positional relationship between the input point and the points forming the already created figure is determined. By determining whether to set figure constituent points or invalidate a series of position information by considering the above, the work of switching processes is simplified and the efficiency of figure drawing work is improved.

[0007]

DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described below in detail with reference to the drawings.

FIG. 1 shows the configuration and data flow of a graphic drawing system according to the present invention. The position input unit 2 is used by the user to input a position, and uses, for example, one button of a mouse, one key of a function key, one menu element of a display menu, or the like. The data input through the position input section 2 will be referred to as an "input point" hereinafter. Next, the end information input section 3 is used to instruct the division of graphics, and uses, for example, a function key, a recovery key on the keyboard, a RETURN key, or an all-parameter end area on the display menu. Of course, another button on the mouse that is not used for the position input section 2 may also be used. The data input using the termination information input section 3 will be referred to as "termination information" hereinafter. The display unit 4 is a display device using a graphic display. Finally, the processing unit 1 is a system that combines a central processing unit of an electronic computer with software.

FIG. 2 is an example of input data, in which a line segment is drawn using the first two points, and a broken line is drawn using the last four points.

FIG. 3 is an example of a figure constructed using the data shown in FIG.

Next, the operation of each part when creating the line segment P1P2 in FIG. 3 will be explained using the flowcharts in FIGS. 4, 5, and 6. First, when the system starts operating, it displays a message indicating that the points that make up the figure being created (hereinafter referred to as "composition points of the figure being generated") do not yet exist (21).
. That is, the total number of "constituent points of the figure being generated" (hereinafter expressed as N) is set to zero.

[0012] Next, a message is displayed indicating that there is no input of "end information" indicating that data input for one graphic is finished (22). That is, the presence or absence of "end information" (hereinafter referred to as K) is assumed to be null (K=0).

Next, the system waits for data input (
23). Here, the user inputs the position using the position input section 2 or enters the "end information" using the end information input section 3.
Enter. In the data example of FIG. 2, point P1 is the position input part 2.
Input from

Next, it is determined whether the input data is an "input point" or "end information" (24). In the example of FIG. 2, since P1 is an "input point", the input P1 is set as the first "input point" (25).

Next, since the "input point" is the first "input point", a predetermined area, for example, a rectangular area (hereinafter referred to as "rectangular area") having a length of 2 each in the upper, lower, right and left directions, centering on the first "input point". is the same point area) (26).

Next, the "input point" or "end information" is read (27). In the example of FIG. 2, P2 is read. Since P2 is an "input point", let P2 be the second "input point" (2
8, 30).

Next, it is determined whether P2 is within the set same point area (31), and since P2 in the example is not within the same point area, P1, which is the first "input point", is "constituent points of the figure being generated" (32). This means that one of the points that make up the figure has been determined.

Now that one of the points composing the figure has been determined,
Increase the total number of "constituent points of the figure being generated" by one, and here N=
1 (33).

Next, the "constituent points of the figure being generated" are displayed on the display section 4 (34). The circle mark at point P1 in FIG. 3 is an example.

[0020] Then, the number of "constituent points of the figure being generated" is 2.
Since it is smaller than (35) and the "end information" has not been input (37), the second "input point" P2 is set as the first "input point" (38), and the "input point" P2 is The same point area is reset at the center (26).

Next, the third data in FIG. 2 input by the user is read (27), and since it is "termination information" (28),
"End information" present (K=1) is displayed (29), and the first
P2, which is the input point of , is newly set as a "constituent point of the figure being generated" (32).

Next, the total number of "constituent points of the figure being generated" is increased by one (33). Here, N=2.

Then, the created "constituent points of the figure being generated" are displayed at the position P2 (34). The circle mark P2 in FIG. 3 is an example. This completes the input of data for one figure.

Next, the total number (N
) has become 2 or more (35), so the distance between the "component point of the figure being generated" P1 created in the previous iteration and the "component point of the figure being generated" P2 created in the current iteration is The line segments are connected and displayed on the display section 4 (36). Line segment P1P2 in Figure 3
An example of the display is shown with a broken line.

Next, since the presence of "end information" is displayed (K=1), the state is set to create a new figure (21, 22).

Next, the operation of each part when creating the broken line P3P2P6 in FIG. 3 will be explained.

First, P3 in FIG. 2 is read (23). After that, the same process as P1 described above is followed (25, 26,
27, 28, 30, 31, 32, 33, 34, 35, 3
7, 38, 26), P3 is displayed as a "constituent point of the figure being generated", P4 is the first "input point", and K=0.

Next, P5 is read (27). P5 is an "input point" (28, 30) and is within the same point area as the first "input point" P4 (31), so the connection between "input point" P4 and the points forming the created figure is Figure constituent points are determined taking into account positional relationships, etc. (39). Determining by considering the positional relationship between the "input point" and the points composing the created figure means, for example, determining the distance between the first "input point" and the points composing all the created figures. The smallest one is set as the "constituent point of the figure", or the distance from the first "input point" to the first "input point" is the shortest among the constituent points of the created figure that are on the horizontal or vertical line of the first "input point". It is conceivable to consider things like "constituent points of a figure". Furthermore, the method for selecting "constituent points of a figure" may be changed depending on the figure to be drawn. In the examples of FIGS. 2 and 3, P1 and P2 are constituent points of the already created figure, so the distance between P4 and P1 (√13 in the example) and the distance between P4 and P2 (
In the example, √2) is calculated and compared, and the closest distance is selected, P2 in the example.

Next, P6 in FIG. 2 is read (40). Since these are "input points" (41, 42) and are not within the same point area (43), the constituent points P2 of the selected figure are set as "constituent points of the figure being generated" (44). This is the second "constituent point of the figure being generated" in the figure currently being created.

Next, the total number of "constituent points of the figure being generated" is set to 1.
In this case, N=2 (45).

Next, the ``constituent point of the figure being generated'' is displayed at the position of the selected ``constituent point of the figure'' (P2 in this case) (46). The circle mark P2 in FIG. 3 is an example.

Next, since N=2 (47), the "constituent points of the figure being generated" P3 and P2 are connected with a line segment and displayed on the display section 4 (48). This is the case with the solid line segment connecting P3 and P2 in FIG.

Next, since K=0 (49), the third "input point" P6 is changed to the first "input point" (50). The subsequent movement is similar to the process of inputting P2 when creating the line segment P1P2 described above. As a result, a line segment connecting P2 and P6 is created, and a figure (broken line) P3P2P6 is created.

[0034] Furthermore, if the same point area is input three times in a row (43), all of the first "input point", second "input point", and third "input point" are invalidated. (51), and enters a state in which new input of "constituent points of the figure being generated" is accepted (23).

Although this embodiment deals with drawing line segments and broken lines, the present invention is also applicable to drawing other figures.

For example, when drawing a rectangular parallelepiped, a circle, etc., it is only necessary to specify two points constituting the figure, so the figure can be drawn without waiting for input of end information as in the above embodiment. The changes to be made in this case are 36 and 48 in the drawing, and K=1 can be set after drawing the desired figure.

[0037]

According to the present invention, the coordinates indicated by the position information (hereinafter referred to as input points) are set as figure constituent points according to the number of times the position information input from the position input device is input into a predetermined area. The task of switching processes is simplified by determining whether to set the shape constituent points in consideration of the positional relationship between the input point and the points composing the already created shape, or to invalidate a series of position information. , and the efficiency of graphic drawing work is improved.

[Brief explanation of the drawing]

[Figure 1] Configuration diagram of the present invention

[Figure 2] Example of input data

[Figure 3] Example of display of creation results

[Figure 4] Flowchart showing the operation of the processing unit (Part 1)

[Figure 5] Flowchart showing the operation of the processing unit (Part 2)

[Figure 6] Flowchart showing the operation of the processing unit (Part 3)

[Explanation of symbols]

1... Processing section, 2... Position input section, 3... Termination information input section, 4
...Display section.

Claims (1)

[Claims] Claims: 1. A data processing device for inputting/outputting, manipulating, and storing figures, comprising: a position input unit for inputting position information; and end information indicating delimitations between points composing a figure (hereinafter referred to as figure constituent points). Depending on the end information input section where input is made and the number of times the position information is input continuously in the same area, the coordinates indicated by the position information (hereinafter referred to as input points) are set as figure constituent points, or the input points and the created Decide whether to set the figure constituent points in consideration of the positional relationship with the points making up the figure and the figure to be drawn, or to invalidate the continuously input position information, and set the end information and figure constituent points. A graphic drawing system characterized by having a processing section that draws a graphic based on the drawing, and a display section that displays the drawn graphic.