JP2000137473A - Display device displaying variable angle cross cursor - Google Patents

Abstract

PROBLEM TO BE SOLVED: To make it possible to easily obtain nearest positions between graphics displayed on a display. SOLUTION: This is a method for measuring a smallest distance between graphics 20, 30 displayed on a screen 91 of a display device 90 and the method calculates easily the shortest distance between the graphics 20, 30 by making it possible to set a cross cursor at any display angle, rotating the cross cursor displayed on screen 91 to position a reference line 11 in parallel to the graphics, or positioning an orthogonal line 12 orthogonal to the graphics, or making it possible to easily judge a tangent point 22 of the reference line 11 to the graphic.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a cross cursor for indicating an arbitrary position on a display device of a computer which handles graphics. Further, the present invention relates to a method for calculating a shortest position and a shortest distance between two figures shown on a display device of a computer which handles figures by enabling a cross cursor to be rotated.

[0002]

2. Description of the Related Art Conventionally, for example, a computer system for executing a printed circuit board CAD system or the like includes a device having a function of pointing an arbitrary position on a screen such as a mouse,
A pointing device is connected. A cross cursor is used to indicate the position indicated by the pointing device on the display device of the computer system.

FIG. 10 shows an example of a screen of a display device on which a pattern of a printed circuit board is displayed in a printed circuit board CAD system. A wiring pattern 92 is displayed on a screen 91 of the display device 90. Further, on the screen 91, the position indicated by the pointing device is shown as a cross cursor 10. The cross cursor 10 includes a reference line 11 serving as a reference and an orthogonal line 12 intersecting the reference line at right angles. The position indicated by the pointing device is indicated by an intersection 13 between the two lines. The cross cursor 10 is displayed on the screen 91 by the pointing device.
It can be freely moved up, down, left and right to a desired position on the upper side. When designing a printed circuit board using such a printed circuit board CAD system, it is necessary that adjacent wirings 92 maintain a predetermined distance from each other, and it is necessary to know the shortest distance between the adjacent wirings. Required.

A method for measuring the interval between a plurality of figures displayed on a display device using the conventional technique will be described with reference to FIG. As shown in FIG. 11, on a screen 91 of the display device, a figure 20 composed of a circle to be measured and a figure 30 composed of a rectangle are displayed. Cross cursor 1
0 is displayed. Hereinafter, a description will be given of a place where the graphic 20 and the graphic 30 are closest to each other, and a procedure of calculating a distance between the two.

By operating the pointing device, the cross cursor 10 is moved to a position 22 on the circumference 21 of the graphic 20 where the distance to the graphic 30 is considered to be the shortest (FIG. 1).
2). Here, the coordinates of the intersection 13 of the cross cursor 10 are stored by pressing a mouse button or the like. Next, the cross cursor 10 is moved to the figure 20 on the line segment 31 of the figure 30.
Move to the position 32 where the distance to is considered shortest (FIG. 13). Here, the coordinates of the intersection 13 of the reference line 11 and the orthogonal line 12 of the cross cursor 10 are stored by, for example, pressing a mouse button. The computing means of the computer is shown in FIG.
By using the coordinates of the position 22 on the graphic 20 stored in the step (2) and the coordinates of the position 32 on the graphic 30 stored in FIG. 13, the distance between the two is calculated, and the calculated distance is displayed on the display device.
In this way, the shortest distance between figure 20 and figure 30 can be measured and the result can be obtained.

On the other hand, JP-A-5-73256 discloses that
It is shown that an inclined crosshair cursor is generated and a diagonal line is drawn. However, this method only generates a crosshair cursor connecting two points located at different heights, and is not shown to rotate the cross cursor itself. Japanese Patent Application Laid-Open No. 7-200879 discloses that, when an isometric projection drawing is made, a cross cursor is selected, a starting point is set, a traveling trajectory angle is set, and a movement amount is input. , But not to rotate the cross cursor.

[0007]

In the distance measuring method as described above, the coordinates determined and stored in FIG.
It is not certain that it is the shortest position with respect to 0, and it is not certain that the coordinates determined and stored in FIG. 13 are the shortest positions with respect to the graphic 20, and the shortest positions of both are reliably measured. There is a problem that may not exist.

[0008]

In order to solve the above-mentioned problems, the present invention relates to a display device of a computer, and more particularly, to a cross device capable of arbitrarily setting a display angle of a cross cursor pointing to an arbitrary position on a screen of the display device. It is characterized by having a cursor rotating means.

[0009] The present invention is characterized in that in the above display device, there is provided a cross cursor rotating means for rotating around the intersection of the cross cursor.

In order to solve the above problems, the present invention relates to a method of displaying a cross cursor on a display device of a computer, wherein the cross cursor for arbitrarily setting a display angle of a cross cursor pointing to an arbitrary position on a screen of the display device is provided. The method is characterized by comprising a step of rotating.

Further, according to the present invention, in the above display method, the display is rotated about the intersection of the cross cursor.

According to the present invention, the shortest distance between a curve displayed on a display device of a computer and a straight line displayed at a position distant from the curve is determined by using a cross cursor which can be rotated about an intersection. In the calculation method,
A step of overlapping a cross cursor at one point on the straight line, a step of rotating the cross cursor so that one of the cross cursors overlaps the straight line at this point, and a step of rotating the cross cursor at one point of the curve. When the cross cursor does not pass through the straight line without rotating the cross cursor to a position where the other cross cursor intersects the curve, and the point where one cross cursor touches one point of the curve. Moving the cross cursor on another one of the cross cursors without rotating them, and moving the intersection of the cross cursor to a point where one of the cross cursors touches one point of the curve without rotating the coordinates of this point And reading the coordinates of the cross cursor by moving the intersection of the cross cursor to a point where the other cross cursor intersects the straight line without rotating the point. It consists of a process for calculating the distance between two points using the coordinates and to calculate the shortest distance between a straight line away from the curve and curve.

According to the present invention, there is provided a method for calculating a shortest distance between a curve shown on a display device of a computer using a cursor rotatable about an intersection and a point away from the curve. The process of superimposing the cross cursor on one point above, the process of rotating the cross cursor so that one of the cross cursors contacts only one point of the curve at this point, and the other of the cross cursor moving away from the curve at this time When the cross cursor is not passing through another point, the cross cursor is rotated so that one of the cross cursors contacts only one point of the curve, and the other one of the cross cursor passes through another point away from the curve. Moving the cross cursor to one point of the curve while another cross cursor touches only one point of the curve and passing another point of the cross cursor away from the curve. Reading the coordinates of a point on the curve, moving the cross cursor to the other point without rotating it, and reading the coordinates of this point, and calculating the distance between the two points using the coordinates of the two points The shortest distance between the curve and a point separated from the curve was calculated.

(Operation) Since the display angle of the cross cursor can be set arbitrarily, the position where the vertical line or horizontal line of the cross cursor is in contact with the line constituting the figure displayed on the display device is determined. It can be easily determined, and the closest position between figures can be easily obtained.

[0015]

DESCRIPTION OF THE PREFERRED EMBODIMENTS A display device of a computer for realizing a method according to the present invention has a function or means for displaying a cross cursor on a screen and a function or means for moving the cross cursor to an arbitrary position in the screen. And a function or means for rotating the cross cursor within the screen.
The rotation of the cross cursor is performed around an intersection where two orthogonal lines constituting the cross cursor intersect. Hereinafter, a method of calculating the shortest distance of the graphic shown in FIG. 11 using the present invention will be described. As shown in FIG.
A circular graphic 20 and a rectangular graphic 30 are displayed on a display screen 91 of a display device 90 of the computer, and a cross cursor 10 including two orthogonal lines, a reference line 11 and an orthogonal line 12 is displayed. ing.

First, the cross cursor 10 is moved on a line segment 31 which forms the figure 30 and is close to the figure 20 (FIG. 1).
In FIG. 1, the reference line 11 of the cross cursor 10 is shown in a horizontal state, and the orthogonal line 12 is shown in a vertical state. In particular, at this point, the cross cursor 10 may not be in such a state. . Also, the intersection 13 of the cross cursor 10
May be moved to any position on the line segment 32,
The position may not necessarily be the position considered to be closest to the figure 20.

Next, by depressing the key of the pointing device to which the function of gradually rotating the cross cursor 10 is assigned, one of the lines constituting the cross cursor 10, for example, the reference line 11 forms the graphic 30 and the graphic 20. The angle of the cross cursor 10 is adjusted so as to overlap on the near line segment 31, that is, become parallel (FIG. 2). FIG.
1 shows a state in which the reference line 11 and the orthogonal line 12 constituting the cross cursor 10 of FIG. 1 are rotated around the intersection 13 in a counterclockwise direction. Here, the reference line 11 and the orthogonal line 1
2 always keeps a straight angle.

Next, the reference line 11 is set on the circumference 21 of the figure 20 while keeping the orthogonal line 12 of the cross cursor from moving.
Then, the orthogonal line 12 is moved to a position 22 in contact with the circumference 21 (FIG. 4) while the reference line 11 in contact with the circumference 21 is not moved. Intersection 1 of the cross cursor 10 at this time by pressing the mouse button, etc.
3 is stored, and the display device 90
Is displayed at the intersection 13 of the cross cursor 10 on the screen 91 of FIG. This position 22 corresponds to the figure 20 closest to the figure 30.
The exact position of the.

Next, the orthogonal line 12 of the cross cursor 10
Is moved, the reference line 11 is moved onto a line segment 31 close to the figure 20 constituting the figure 30 (FIG. 5). The orthogonal line 12 passes through the position 22 of the figure 20, and the position 32 is exactly the position of the figure 30 closest to the figure 20. At this position, by pressing a mouse button or the like, the coordinates of the position 32 of the intersection 13 of the cross cursor 10 at this time are stored, and a mark is displayed at the intersection 13 of the cross cursor 10 on the screen 91 of the display device 90. .

Next, by pressing a mouse button or the like,
The distance between the coordinates on the graphic 20 stored in FIG. 4 and the current coordinates on the graphic 30 stored in FIG. 5 is calculated. By displaying the calculation results on the screen 91 of the display device 90, it is possible to obtain accurate measurement results of the shortest distance and its position in FIGS.

As described above, according to this embodiment,
By providing a rotation unit for arbitrarily rotating the display angle of the cross cursor in a display device of a computer, accurate distance measurement between figures displayed on a screen of the display device can be easily performed.

The accurate measurement of the distance between the figures displayed on the screen of the display device according to this method can be used, for example, for measuring the width of a wiring pattern or measuring the insulation distance in a printed circuit board CAD.

In the above embodiment, when the two figures have straight lines parallel to each other, the reference line 11 of the cross cursor 10 is brought into contact with one of the straight lines,
2 stores the coordinates of an arbitrary point on one straight line that intersects both the straight line and the other straight line, and stores the coordinates of the point where the orthogonal line 12 intersects the other straight line by moving the reference line 11. The shortest distance between two straight lines can be measured using these coordinates.

Hereinafter, another embodiment of the present invention will be described. In this embodiment, as shown in FIG. 6, the shortest distance between the graphic 20 displayed on the screen 91 and the point 40 is accurately measured using the cross cursor 10 which can be rotated. is there. First, cross cursor 10 figure 2
The cross cursor 10 is moved so as to move on the circumference 21 and the key to which the function of gradually changing the angle of the cross cursor is assigned is rotated so that the reference line of the cross cursor 10 touches the circumference 21 (FIG. 7). In this state, since the orthogonal line 12 of the cross cursor 10 does not overlap the point 40, the cross cursor 1
It can be seen that the position of 0 is not on the shortest distance.

By adjusting the position and angle of the cross cursor 10 on the circumference 21, the reference line 11 of the cross cursor 10 is moved to a position 22 where the reference line 11 contacts the circumference 21 and the orthogonal line 12 overlaps the point 40 ( (FIG. 8). Circumference 21
This position 22 above is the position closest to the point 40. In this state, by pressing a mouse button or the like, the position 22
Is stored, and this position is described on the screen.

Next, the reference line 11 is moved so as to overlap the point 40 while keeping the orthogonal line 12 from moving (FIG. 9). In this state, press the mouse button etc.
The coordinates of the point 40 are stored, and this position is described on the screen. By calculating the distance using the coordinates stored in FIG. 8 and the coordinates stored this time and displaying the distance on the screen 91 of the display device 90, the correct shortest distance between the figure 20 and the point 40 can be obtained. .

The reference line 11 and the orthogonal line 1 used in the above description
There is no problem in reversing the relationship with 2. The direction in which the cross cursor is rotated may be clockwise or counterclockwise. Furthermore, the rotation of the cross cursor may be performed while stopping the intersection or while moving the intersection.

Further, the display device used in the present invention has a function or means for displaying a cross cursor and a function or means for rotating the cross cursor about the orthogonal line 13 between the reference line 11 and the orthogonal line 12. Have. Further, the cross cursor can be moved by fixing either the reference line or the orthogonal line, and can be moved without fixing either the reference line or the orthogonal line. You may do it.

[0029]

As described above, according to the present invention,
By using a position display system provided with a rotation unit capable of arbitrarily setting the display angle of the cross cursor, the reference line or the orthogonal line of the cross cursor can be positioned parallel or orthogonal to the straight line of the figure. Further, it is possible to accurately and easily determine where the reference line or the orthogonal line of the cross cursor is in contact with the figure, sufficiently address the problems of the prior art, and accurately measure the distance of the figure on the display device. be able to.

[Brief description of the drawings]

FIG. 1 is a diagram (step 1) illustrating a method for measuring a distance according to the present invention.

FIG. 2 is a diagram illustrating a method for measuring a distance according to the present invention (step 2).

FIG. 3 is a diagram illustrating a method for measuring a distance according to the present invention (step 3).

FIG. 4 is a diagram (step 4) illustrating a method for measuring a distance according to the present invention.

FIG. 5 is a diagram illustrating a method for measuring a distance according to the present invention (step 5).

FIG. 6 is a view for explaining a method of measuring a distance according to another embodiment of the present invention (step 1).

FIG. 7 is a view for explaining a method of measuring a distance according to another embodiment of the present invention (step 2).

FIG. 8 is a view for explaining a method of measuring a distance according to another embodiment of the present invention (step 3).

FIG. 9 is a view for explaining a method of measuring a distance according to another embodiment of the present invention (step 4).

FIG. 10 is a diagram showing a display screen of a printed circuit board CAD.

FIG. 11 is a view for explaining a method of measuring a distance by a conventional technique (step 1).

FIG. 12 is a view for explaining a method of measuring a distance by a conventional technique (step 2).

FIG. 13 is a view for explaining a method of measuring a distance by a conventional technique (step 3).

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 10 Cross cursor 11 Reference line 12 Orthogonal line 13 Intersection point 20 Graphic 21 Circumference 22 Contact position 30 Graphic 31 Line segment 32 Intersecting position 40 points 90 Display device 91 Screen 92 Wiring pattern

──────────────────────────────────────────────────続 き Continued on the front page (51) Int.Cl. ⁷ Identification symbol FI Theme coat ゛ (Reference) G09G 5/00 510 G06F 15/60 652G (72) Inventor Nobuyoshi Yamazaki 7-11-1, Higashi Narashino, Narashino City, Chiba Prefecture No. Hitachi Keiyo Engineering Co., Ltd. (72) Inventor Yutaka Maeno 7-1-1 Higashi Narashino, Narashino City, Chiba Prefecture F-term in the Industrial Equipment Division, Hitachi, Ltd. 5B046 AA08 DA02 FA02 FA05 HA08 JA02 5C082 AA01 AA17 AA24 AA36 BA12 BA43 BB42 CA02 CA42 CA52 CB06 DA87 MM09 MM10 5E501 AA02 AA24 AC09 AC34 BA05 CA02 CB03 EA05 EB05 FA02 FA14 FB24 FB43

Claims (6)

[Claims] 1. A display device for a computer, the display device displaying a variable-angle cross cursor having a cross cursor rotating means capable of arbitrarily setting a display angle of a cross cursor indicating an arbitrary position on a screen of the display device. . 2. The display device according to claim 1, further comprising a cross cursor rotating means for rotating around an intersection of the cross cursor. 3. A method of displaying a cross cursor on a display device of a computer, comprising a step of rotating the cross cursor for arbitrarily setting a display angle of a cross cursor indicating an arbitrary position on a screen of the display device. Cross cursor display method to be performed. 4. The cross cursor display method according to claim 3, wherein the rotation is made about the intersection of the cross cursor. 5. A shortest distance between a curve displayed on a display device of a computer and a straight line displayed at a position distant from the curve is calculated using a cross cursor which can be rotated about an intersection. A method of overlaying a cross cursor at a point on the straight line, rotating the cross cursor at this point so that one of the cross cursors overlaps the straight line, and A step of moving the cross cursor on the straight line without rotating the cross cursor at a position where the other cross cursor intersects the curve when not passing through one point; Moving the cross cursor to the contact point without rotating the cross cursor on another one of the cross cursors; and moving the cross cursor to the point where one of the cross cursors contacts the one point of the curve. Moving the intersection point of the cursor without rotating it and reading the coordinates of this point; and moving the intersection point of the cross cursor to a point where the other one of the cross cursors intersects with the straight line without rotating the coordinates of this point. A method for calculating a shortest distance between a curve and a straight line distant from the curve, comprising a step of reading and a step of calculating a distance between the two points using the coordinates of the two points. 6. A method for calculating a shortest distance between a curve shown on a display device of a computer using a cursor capable of rotating about an intersection and a point away from the curve, the method comprising: A process of overlapping the cross cursor at one point, a process of rotating the cross cursor so that one of the cross cursors contacts only one point of the curve at this point, and a process of moving the other cross cursor away from the curve at this time. When the cross cursor does not pass through one point, the cross cursor is rotated so that one of the cross cursors contacts only one point of the curve, and the cross cursor is rotated so that the other one of the cross cursors passes another point away from the curve. The process of moving the cursor, and one of the cross cursors touches only one point of the curve and the other of the cross cursors on the curve passing through another point away from the curve. The steps include reading the coordinates of a point, moving the cross cursor to the other point without rotating it, and reading the coordinates of the point, and calculating the distance between the two points using the coordinates of the two points. A method of calculating a shortest distance between a curve and a point separated from the curve.