JPS6330983A - Graphic processor - Google Patents

Abstract

PURPOSE:To clear an intersection position and to form an easy-to-see image by detecting the intersection position, adjusting one side length of a line element to constitute the detected line and setting a line part to constitute the detected line to the intersection position. CONSTITUTION:The starting point and terminal point positions, which are two feature points, are designated by a mouse 1 and the coordinate position is inputted through a position detecting part 4. Next, when the section between two points is linked, it is discriminated whether or not other generating feature point (intersection) exists, and when the feature point (intersection) newly occurs, it is discriminated whether or not the line part of the own straight line comes to the first feature point position. At this time, it is discriminated whether or not the line segment of other straight line exists at the characteristic point. When it is discriminated that the blank part of other straight line comes to the feature point, a step S7 adjusts the length of the line part to constitute other straight line and the blank part and the line part comes to the feature point. Thus, when the line is drawn by a broken line, the line part to constitute the broken line is positioned to the intersection position with other line without fail and the intersection position is cleared.

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to a graphic processing device, and particularly to a graphic processing device that draws graphics using lines.

[Prior Art] In recent years, many word processors and the like are equipped with graphic processing functions. For example, when explaining the tabulation function among these graphic processing functions, it is possible to create a table using broken lines rather than solid lines, or to create a frame using simply line segments.

Further, in the case of a device for graphic processing, it is possible to perform graphic processing using various line types such as not only solid lines but also broken lines, -dot chain lines, double-dot chain lines, and the like.

[Problems to be Solved by the Invention] Now, let us assume that among these line parts, for example, a table is created using broken lines, or a rectangle is simply drawn. At this time, as shown in Fig. 6, while the length of one side of the rectangle is variable (changes depending on the set position), the short solid line part (hereinafter referred to as
Since the lengths of the line portion (simply referred to as a line portion) and the blank portion are fixed, depending on the combination, the blank portion may end up at the corner (end portion 60) of the rectangle, making it difficult to see.

Also, in drawing, for example, if broken lines intersect,
Due to the above-mentioned reason, the intersection point is as shown in FIG. 5(a), and the location of the intersection point is not clear and is ambiguous.

In addition, 50 in the figure is a broken line connecting two points manually drawn, and 5
1 is the previously input broken line.

The present invention has been made in view of such prior art, and provides a figure in which the line portion is located at a feature point such as an intersection, a bending point, or a branching point of lines, so that the position of the feature point can be reliably recognized. The purpose of this invention is to provide a processing device.

[Means for solving the problem] In order to solve this problem, the present invention has the following configuration.

That is, when drawing a line consisting of line elements of at least a blank part and a line part, the first detection means detects the intersection position with another line, and the first detection means detects the intersection position among the plurality of lines forming the intersection point. and an adjusting means for adjusting the length of at least one of the line elements constituting the line detected by the second detecting means.

[Operation] In the configuration of the present invention, the intersection position is detected by the first detection means, and the length of at least one of the line elements constituting the line detected by the second detection means is adjusted by the adjustment means, The line portions constituting the line detected by the second detection means are arranged to be at the intersection position.

[Embodiments] Hereinafter, embodiments of the present invention will be described in detail with reference to the accompanying drawings.

FIG. 1 is a block diagram of the graphic processing apparatus of this embodiment.

In the figure, 1 is the main body of the graphic processing device, and 2 is, for example, a mouse for inputting coordinate positions manually. 3 is a CPU that controls the graphics processing apparatus main body 1, and operates according to a program stored in an internal ROM 3a. Further, 3b is a RAM used as a work area for the CPU 3.

Note that the ROM 3a stores a program that follows the processing procedure of the flowchart shown in FIG. Reference numeral 4 denotes a position detection unit that detects the position of the mouse 2 using a signal transmitted from the mouse 2. 5 determines whether or not a dashed line intersects with another line when connecting two points specified by mouse 2, and determines the distance from the starting point to the first intersection, and the distance between the intersections if there are multiple intersections. From these distances, determine whether a blank part of the line elements (blank part and line part) that makes up the broken line will be located at the intersection (hereinafter both end points of the line and the intersection are simply referred to as feature points). This is a feature point state determination unit that determines. Reference numeral 6 denotes a broken line pattern adjustment unit that adjusts the lengths of line elements constituting a broken line based on instructions from the feature point determination unit 5.

7 is a broken line pattern generating section that generates a broken line pattern according to the adjusted line elements, and the broken line pattern generated here is displayed on the display section 8. Reference numeral 9 denotes a data storage memory for storing the coordinate positions of the end points (two points) of the line previously manually drawn.

An overview of the processing in the graphic processing apparatus of this embodiment having the above configuration will be explained.

FIGS. 4(a) to 4(C) show the case where the feature point positions (42, 44, 46) are not clear when the broken lines intersect. In the figure, 40, 41, 43, and 45 are broken lines connecting two points manually drawn with mouse 2, respectively.

As can be seen from this figure, there are three cases in which the feature point positions are not clear. When clarifying the positions of these feature points, for example in the case of FIG. 4(a), the broken line 40
It can be seen that it is sufficient to arrange the line portion to be at the position of the feature point 42. Also, in the case of Fig. 4(b), the line part of the broken line 43 and in the case of Fig. 4(C), the line part of the broken line 40.45 are placed at the respective feature point positions 44.46. You can see that it can be solved by doing this. Therefore, in the case of FIG. 4(C), the two broken lines have to be adjusted.

An example of adjustment will be described below with reference to FIGS. 5(a) and 5(b). Note that FIG. 5(a) corresponds to FIG. 4(a).

Further, in this embodiment, the basic lengths of the line portion and the blank portion of the line elements constituting the broken line are each 10 mm.

6II1m, but is not limited to this.

Now, normally, when two points are specified, a broken line is expressed by alternately drawing a line portion of the basic length and a blank portion between the two points. However, in this case, although there is no problem with the starting point, line parts are not necessarily located at the feature points, and the positions of those feature points (intersections and end points) become ambiguous (Figure 5 (a)) . Therefore, in this case, by adjusting the length of one of the broken line elements between the feature points, the line portion can be positioned at the feature point. In this embodiment, both the line part and the blank part of the line element are adjusted according to the ratio of their basic lengths. This is because the difference in appearance between the image of the entire adjusted broken line and the image of the broken line made up of line elements of the basic length is small, and there is an advantage that the image does not feel strange.

In addition, there is a method for determining whether a blank space appears at the position of a feature point, and it is determined that the virtual distance statement between the starting point and the feature point (or between the feature point and the next feature point) satisfies the following inequality. When satisfied, a blank space will appear at the feature point.

n (bow)+b<A<(n+1) (bow)
-(1) However, the basic length of b/line part (10mm
) W: Basic length of blank part (6mm) n+1.2. ... is an integer.

When applied to Figure 5(a), since dan = 44, inequality (1) is satisfied when n = 2,
It can be seen that blank areas appear at the feature points.

Therefore, at this time, the lengths of the broken line 50 and the blank space are adjusted according to the following equations (2) and (3).

The lengths of the line part and blank part after adjustment are b' and w, respectively.
'.

In addition, the above formula is b' - b : w' - w = b : wnb
' + (n-1)w' = '1.

When calculated according to equations (2) and (3) above, b'
= 10.48mm, w' = 6.28+nm,
When a broken line is drawn using this adjusted line element, Figure 5 (
The adjustment is made as shown by the broken line 54 in b), and the position of the feature point becomes clear.

After the adjustment of the broken line between the starting point 52 and the feature point 53 is completed through the above process, the adjustment process starts with the feature point 53 as the starting point and the next feature point (intersection or end point).

The above explanation was about FIG. 4(a), but
The same holds true for FIGS. 4(b) and 4(C).

By adjusting the length of the line elements constituting the broken line in the above-mentioned processing outline, the characteristic points of the broken line are always made clear.The processing procedure will be explained according to the flowchart of FIG. 2.

First, in step S1, the starting point and ending point positions, which are two feature points, are specified using the mouse 1, and via the position detecting section 4,
The coordinates are determined manually. Next, in step S2, it is determined whether there is another feature point (intersection) that occurs when the two points are connected. At this time, if it is determined that the line segment does not intersect with another line segment, the process moves to step S8, and the manually entered starting point and ending point are adjusted. This is because there may be a dashed blank space even at the end point. Further, when a new feature point (intersection) is generated in the determination in step S2, the process moves to step S3, and the process described below is performed.

The method of calculating the feature point (intersection) position here is based on the equation of a virtual straight line connecting the two input end points (fulcrum and end point) and the two input points stored in the data storage memory 9.
This is done by finding a solution to the equation of a straight line connecting the coordinates of the points.

In step S3, when connecting the two points manually entered in step S1 with a broken line (hereinafter, this line is particularly referred to as a self-straight line), it is determined whether the line portion of the self-straight line comes to the first feature point position. . If it is determined that a line portion is present based on this determination, the process proceeds to step S4, but if it is determined that a line portion is not present at the feature point (that is, a blank portion is present) (FIG. 4(a)).

In case (C)), in step S6, the lengths of the line part and the blank part constituting the self-straight line from the starting point to the feature point are adjusted, and the process moves to step S4. In step S4, another straight line (hereinafter referred to as "other straight line") is attached to the feature point.
Determine whether there is a line segment. In this judgment, if it is determined that the line part of the other straight line is located at the feature point, the process moves to step S5.Similar to S6, the lengths of the line part and blank part constituting the other straight line are adjusted, and the line part of the other straight line is located at the feature point. Let's make sure that the department comes.

This means that the intersection position at the first feature point from the starting point manually entered in step S1 can be clarified.

Now, in step S5, it is determined whether all feature points have been processed. If this judgment determines that there are still feature points, the feature point whose position was clarified earlier will be considered as the starting point, and the same process will be performed with the next feature point. .

Also, in the above explanation, when two points are connected with a broken line, the intersection position with another line is made clear.
For example, when drawing a rectangle shown in FIG. 6, if the bending points of each line segment (four lines) are treated as feature points, the line portion will be reliably located at the corner. Further, the same applies to other points such as branch points.

As explained above, according to this embodiment, when a line is drawn using a broken line, the line part that makes up the broken line is reliably located at the intersection with another line, and the intersection is clearly located. Become.

In addition, in this example, the length of the line part itself will be at both ends of the intersection position, and the intersection will eventually be composed of a line part with twice the length, but the length of the line part itself will be at both ends of the feature point position. By setting the length of the line part to 1/2, the feature point positions (33 to 35) can be made equal to the length of the line part as shown in FIG.

In addition, in this example, when adjusting the length of a line element, the line part and the blank part were each made longer than the basic length.
It is clear that the same effect can be achieved by adjusting the length of the line element to be shorter, and the length of only one of the line elements may be adjusted.

Furthermore, in this embodiment, the lengths of the individual line parts and blank parts constituting the broken line are adjusted, but the same result can also be achieved by adjusting the length of only one line part (or blank part), for example. The effect can be achieved by using two or more lines (
Alternatively, this can also be achieved by adjusting only the length of the blank space.

Furthermore, although this embodiment has been described with reference to a broken line, it is of course applicable to, for example, a dotted line, a dashed-dot line, a dashed-two dotted line, etc.

Further, in this embodiment, the case where the display is displayed on a display device has been described, but the present invention may also be applied to, for example, forming a permanent visible image (a printing device, an x-y plotter, etc.).

Furthermore, if a circular arc is used as the line connecting two points, the length of the line may be calculated and processed, but it may also be achieved by processing using an angle.

[Effects of the Invention] As explained above, according to the present invention, when a line composed of line elements of a line part and a blank part is drawn, the line part is located at the intersection with another line, and the line part is located at the intersection with another line. The position of the intersection becomes clear, and an image that is easy to see can be formed.

[Brief explanation of the drawing]

Fig. 1 shows the block structure of the image processing device of this embodiment, Fig. 2 is a flowchart for explaining the processing procedure of this embodiment, and Fig. 3 shows a plurality of broken lines drawn in the graphic processing device of this embodiment. Figures 4 (a) to (C) show the output when the broken line intersects with the dotted line,
A diagram showing that the intersection position is not clear; Figure 5 (a') is a diagram for explaining the prior art;
FIG. 6B is a diagram showing the effect of this embodiment, and FIG. 6 is a diagram showing the conventional technique. In the figure, 1... Graphic processing device body, 2... Mouse, 3
...-CPU, 3 a-FtOM, 3 b-・RAM,
4--Position detection unit, 5-End point state determination unit, 6-...
- Broken line pattern adjustment section, 7... Broken line pattern generation section,
8...Display unit, 9...Data storage memory. Figure 2 (b) □ Figure 4 m--no

Claims (3)

[Claims] (1) When drawing a line consisting of line elements of at least a blank part and a line part, a first detection means for detecting the position of an intersection with another line; and a first detection means for detecting the position of an intersection with another line; A second detection means for detecting a line in which the blank portion is located at a position, and an adjustment means for adjusting the length of at least one of the line elements constituting the line detected by the second detection means. , A graphic processing device characterized in that the line portion is located at the intersection position. (2) The graphic processing apparatus according to claim 1, wherein the adjusting means adjusts according to the ratio of the lengths of the blank portions and the line portions. (3) The graphic processing apparatus according to claim 1, wherein the second detection means makes the determination according to the distance between the intersection position and an adjacent intersection position or end point position.