JPS63140375A - Graphic plotting system - Google Patents

Abstract

PURPOSE:To reduce the number of times of instruction of coordinate by displaying a rectangular shape having a cursor and a first instructing point as one diagonal line until a second instructing point is inputted after the first instructing point is inputted. CONSTITUTION:An elliptical arc plotting is instructed according to a plotting item selection menu 4 and then, one point on a display screen 5 is designated as the first instructing point 7 by the use of a mouse 2. Then, in order to instruct the second instructing point 8, when the cursor 3 is moved by the use of the mouse 2, a rectangular shape display means 1A defines the position of the cursor 3 moving on the display screen 5 and the first instructing point 7 to be one diagonal line to plot the rectangular shape 10 horizontal to the display screen 5. The rectangular shape 10 repeatedly and gradually re-plotted together with the movement of the cursor 3 and when the second instructing point 8 is instructed, the rectangular shape 10 disappears to plot the elliptical arc 6.

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to a graphic drawing method in which an operator inputs coordinates using a coordinate input device such as a mouse to draw a graphic of an elliptical arc.

[Conventional technology]

FIG. 2 shows an example of a commonly used graphic drawing method and its screen. In the figure, 1 is a display device, 2 is a mouse which is a coordinate input device, 3 is a cursor for indicating the coordinates on the screen specified by the mouse 2, 4 is a drawing item instruction menu,
5 is a display screen for drawing. 6 is an example of an elliptical arc drawn by this graphic drawing device, and 7, 8, and 9 are the coordinates specified using the mouse 2, which are the first specified point, the second specified point, and the third specified point, respectively. It is called a pointing point.

Next, the operation will be explained. When drawing an elliptical arc whose major axis or short axis is horizontal on a graphics drawing device, first the drawing item instruction menu of the display device 1 shown in FIG. 2 is used.

Move the cursor 3 onto 4 using the mouse 2 and select the elliptical arc item. At this time, the graphic drawing device is shifted to a mode for displaying an elliptical arc, and is waiting for input of coordinates for determining the elliptical arc to be drawn. Mouse 2 to input coordinates
When the cursor 3 is moved using the cursor 3 and an instruction is given to the display screen 5 for drawing, a desired elliptical arc is drawn. In this example, the input coordinate information includes the first designated point 7. second pointing point 8;
It is designated as the third designated point 9.

[Problem that the invention seeks to solve]

In such a graphic drawing device, due to the nature of the graphic elliptical arc, at the time of designating coordinates, the first designated point 7. is displayed on the display screen 5 for drawing. Second pointing point8. Only the third pointing point 9 is shown, and the visually drawn elliptical arc is not actually displayed, making it difficult to give instructions, and the large number of pointing points slows down the operation. .

This invention was made to solve the above-mentioned problems, and it displays a rectangle in response to the input of a pointing point, and displays two adjacent rectangles at the first coordinate and second coordinate of the rectangle drawing. Make it possible to associate elliptical arcs within the rectangle that touch the sides,
The purpose of the present invention is to obtain a graphic drawing method that is visually superior, requires fewer designated points, and can input elliptical arcs quickly.

[Means for solving problems]

The figure drawing method according to the present invention is based on the position of the cursor 3 that moves on the display screen until the pointing point 8 of the rear tube 2 is specified after the first pointing point 7 is designated, and the position of the first pointing point 7. The present invention is characterized in that a rectangular display means IA is provided for displaying a rectangle 10 having one diagonal line.

[Effect]

In this invention, an elliptical arc is drawn with the first indicated point specified by the cursor as the starting point and the second indicated point as the end point. After that, a rectangle 10 whose diagonal is the position of the cursor 3 moving on the display screen and the first indicated point 7 is displayed until the indicated point 8 of the cylinder 2 is input.

[Embodiments of the invention]

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

FIG. 1 is a configuration diagram showing one embodiment of the present invention, and IA is the first
The position of the cursor 3 that moves on the display screen until the pointing point 8 of the tube 2 is input after the pointing point 7 of the cylinder 2 is input, and the first
10 is a rectangle displayed on the display screen 5 by the rectangle display means IA.

Next, the operation will be explained. First, in order to shift to the elliptical arc drawing mode, elliptical arc drawing is instructed using the drawing item selection menu 4. Next, move the mouse 2 to a point on the display screen 5 for drawing.
is designated as the first pointing point 7 using . Next, the mouse 2 is used to move the cursor 3 to point to the second pointing point 8.

At this time, the rectangular display means IA makes the position of the cursor 3 moving on the display screen 5 and the first pointing point 7 one diagonal line,
- Draw a rectangle 10 whose sides are horizontal to the display screen 5.

This rectangle is repeatedly redrawn as the cursor 3 moves. When the second indicated point 8 is indicated, the rectangle 10 is erased, and an elliptical arc 6 within the rectangle that touches two adjacent sides of the rectangle is drawn at the first indicated point 7 and second indicated point 8 of the rectangle. do.

In the above embodiment, the unevenness of the elliptical arc is specified using the drawing item selection menu 4, but the unevenness may also be specified using buttons attached to the mouse 2. Further, in the above embodiment, after the first pointing point 7 is shown, the second pointing point 8 is shown.
Cursor 3 and rectangle 10 were displayed at the same time until . The same effect can be obtained by displaying a rectangular cursor when the first pointing point 7 is indicated and returning the cursor to the cursor 3 at the second pointing point 8.

〔Effect of the invention〕

As described above, according to the present invention, the position of the cursor that moves on the display screen from when the first pointing point is input until the pointing point of the rear tube 2 is inputted, and the first pointing point are combined into one Since a rectangle display means for displaying a rectangle serving as a diagonal is provided, the elliptical arc to be drawn can be easily associated, and the number of coordinate indications can be reduced.

[Brief explanation of the drawing]

FIG. 1 is a block diagram showing an embodiment of the graphic drawing method of the present invention, and FIG. 2 is a block diagram of a conventional graphic drawing apparatus. In the figure, 1 is a display device, 2 is a mouse, 3 is a cursor, 4 is a drawing item selection menu, 5 is a display screen, 6 is an elliptical arc, 7 is a first pointing point, 8 is a second pointing point, and 10 is a Rectangle IA is a rectangular display means. Agent Masuo Ookimi (and 2 others) 71

Claims (1)

[Claims] In a figure drawing method that draws an elliptical arc starting from the first indicated point specified by the cursor and ending at the second indicated point specified by the cursor, the second indicated point is specified by the cursor. A graphic drawing method comprising: a rectangle display means for displaying a rectangle whose diagonal is a line connecting the first instruction point and the cursor position until the second instruction point is specified.