JPH05297845A - Position indication system - Google Patents

Abstract

PURPOSE:To facilitate the generation and correction of a drawing by a drawing generation and correction system, which uses a computer by displaying a slanting auxiliary line which moves associatively with a position indication cursor displayed on a drawing screen and has an optional angle, at the position indication cursor. CONSTITUTION:When the slanting auxiliary line 2 which moves associatively with crossing auxiliary lines 1 is displayed on the screen as the position indication cursor, the angle of the slanting auxiliary line 2 is settable to an optional angle, and whether or not it is displayed can freely be selected. The angle of the slanting auxiliary line 2 is set to the angle of a necessary slanting line, and then many parallel slanting lines can accurately and easily be drawn by utilizing the inclination of the slanting auxiliary line 2. Consequently, the generation and correction of a drawing which requires a specific angle other than the horizontal and horizontal angles are facilitated.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a position pointing method, and more particularly to a position pointing method for displaying a cross assist line as a position pointing cursor on a screen when a drawing is created and modified by using a computer.

[0002]

2. Description of the Related Art Conventionally, in a figure creating system for creating and modifying drawings by using a computer, as a position designating method for designating a drawing position on a display screen at the time of inputting and modifying a graphic, another system on the screen In order to clarify the positional relationship with a figure, a cross auxiliary line formed by two straight lines in the horizontal and vertical directions passing through a designated point is displayed as a designated cursor.

[0003]

The above-mentioned conventional position pointing method has no problem in the case of drawing in the vertical or horizontal direction, but in the case of drawing with diagonal lines or in the diagonal positional relationship with other figures. When performing the necessary drawing, there was a problem that the position indicating cursor could not be moved to the desired angle and the exact position could not be indicated easily. Some have the function to display the angle of the diagonal line when drawing a straight line, but in this case the drawing of the diagonal line can be done easily, but the angle is not displayed when moving or copying the figure, so create an accurate drawing For this, it was necessary to perform calculations by using the coordinate values of the cursor pointing points displayed in numbers on the screen, or to draw diagonal auxiliary lines in advance to draw and then delete after completion.

An object of the present invention is to eliminate the above-mentioned drawbacks and to provide a position pointing system which can easily confirm an oblique positional relationship.

[0005]

According to the position pointing method of the present invention, when a computer is used to create and modify a drawing, a horizontal and vertical position passing cursor is used as a position pointing cursor indicating a position on the screen. In a position pointing system for displaying a cross auxiliary line composed of two straight lines, information holding means for holding information of a diagonal auxiliary line of a specified angle which moves in conjunction with the position pointing cursor and passes through the pointing point, Configuration is provided with setting means for setting the angle and line type of the auxiliary line and registering in the information holding means, and display selection means for selecting whether or not screen display of the oblique auxiliary line held by the information holding means is necessary. Has been done.

[0006]

Embodiments of the present invention will now be described with reference to the drawings.

1 and 2 are explanatory views showing an example of a screen display by the position pointing method of the present invention in comparison with a conventional method.

FIG. 1 shows a cube obtained by cutting a cube whose one side is ½ of the length of the cube. The oblique projection method is used to represent a solid having a three-dimensional spread, but when drawing such a solid, not only the horizontal and vertical directions but also the depth of the solid is expressed. It is necessary to draw multiple angle diagonal lines.

In such a case, it is not easy to draw many parallel diagonal lines at an accurate angle with the conventional position indicating cursor having only the horizontal and vertical cross assist lines 1 shown in FIG. 1 (b). , It was necessary to calculate the slope for each diagonal line from the coordinate values of the cursors at the start and end points, and plot them so that they were all parallel.

In the case of the position pointing system of the present invention, FIG.
As shown in (a), since a diagonal auxiliary line 2 having an arbitrary angle can be displayed together with the cross auxiliary line 1 as a position pointing cursor, if the angle of the diagonal auxiliary line 2 is adjusted to the angle of the required oblique line, the diagonal auxiliary line 2 is displayed. It is possible to easily draw a required diagonal line by using the inclination of 2.

FIG. 2 is an explanatory view in the case where a skew is included in the movement or copying of a figure. One rectangle is diagonally moved and copied twice, and a total of three rectangles are drawn. ..
FIG. 2A shows a case of the position pointing system of the present invention, in which, in addition to the cross assist line 1 of the position pointing cursor, the oblique assist line 3 is displayed in accordance with the moving angle. The diagonal auxiliary line 3 may be used for movement, and it is easy to confirm the diagonal positional relationship after copying. On the other hand, in the case of the conventional position indicating cursor having only the cross assist line, the position shown in FIG.
As shown in FIG. 3, it is necessary to draw the auxiliary line 4 in order to perform accurate positioning in the oblique direction and delete the auxiliary line 4 after the copying is completed.

Not only in the case of copying or moving, but also in the case of newly drawing, for example, when a plurality of horizontal line segments are drawn along an oblique inclination, the same as above. I can say that.

The control modes for the diagonal auxiliary lines that move in conjunction with the position pointing cursor include a creation mode in which a diagonal auxiliary line is newly designated and displayed, and a diagonal auxiliary line that is being displayed is hidden and necessary information is stored in the memory. Hidden mode to hold on,
There is a redisplay mode in which the diagonal auxiliary lines held in the memory are displayed on the screen.

In the first creation mode, the color (when color display is possible) and line type (solid line, dotted line, broken line, etc.) of the oblique auxiliary line are designated, and then the angle is designated. The designation of the angle can be selected from three methods described later, and the oblique auxiliary line of the designated angle, line type and color is displayed on the screen.

In the second non-display mode, when the necessary drawing is completed, the diagonal auxiliary lines that have been displayed are erased from the screen, and the necessary information regarding the erased diagonal auxiliary lines is stored in the internal memory. However, on the screen, a position indicating cursor having only a normal cross assist line is displayed. When it is not necessary to store the information in the memory, the information on the diagonal auxiliary line can be discarded together with the erasure.

The third redisplay mode is a mode in which the diagonal auxiliary line stored in the internal memory is called and displayed on the screen, and the diagonal auxiliary line used immediately before is displayed again. It is also possible to store information on a plurality of diagonal auxiliary lines in the internal memory and call them sequentially to display the necessary diagonal auxiliary lines. In this case, when storing a new diagonal auxiliary line in the non-display mode, if there is no free space in the memory, the oldest one at the time of registration may be discarded.

The following three methods can be used to input the angle of the oblique auxiliary line. The first is a method in which a part of the diagonal line in the screen having the same angle as the angle given to the diagonal auxiliary line is clipped so that the angle of the clipped diagonal line is captured as the angle of the diagonal auxiliary line. The second is a method of directly inputting the angle of the diagonal auxiliary line by a numerical value. The third is a method similar to the method of drawing diagonal lines or a method of setting simultaneously with drawing. In the case of this method, first, a reference point for drawing is designated, the position designation cursor is moved, and then a diagonal line passing through the two points of the reference point and the position designation cursor is used as an oblique auxiliary line. In the case of this method, if it is set at the same time as drawing, an oblique auxiliary line parallel to the diagonal line drawn first can be set, which is convenient for drawing parallel lines.

As described above, by providing the diagonal auxiliary line to the position indicating cursor, the position indicating cursor can be quickly moved to a specific angle, and an accurate position can be indicated to draw a target figure. be able to.

[0019]

As described above, according to the position pointing method of the present invention, it is possible to display an oblique auxiliary line at an arbitrary angle by superimposing it on a conventional cross auxiliary line. There is an effect that it is easy to create a drawing that requires an angle.

[Brief description of drawings]

FIG. 1 is an explanatory diagram showing an example of a screen display according to the present invention in comparison with a conventional method.

FIG. 2 is an explanatory diagram showing another example of screen display according to the present invention in comparison with a conventional method.

[Explanation of symbols]

 1 Positioning cursor 2,3 Diagonal auxiliary line 4 Additional line

Claims (1)

[Claims] 1. A position indication for displaying a cross auxiliary line consisting of two horizontal and vertical straight lines passing through a designated point as a position pointing cursor indicating a position on the screen when a drawing is created and modified by using a computer. In the method, information holding means for holding information on an oblique auxiliary line of a specified angle that moves in conjunction with the position indicating cursor and passes through the indicated point, and the information for setting the angle and line type of the oblique auxiliary line A position pointing system comprising: a setting means registered in the holding means; and a display selecting means for selectively instructing whether or not the screen display of the oblique auxiliary line held in the information holding means is required.