JPH0785305A - Drawing correction method in cad drawing device - Google Patents

Abstract

PURPOSE:To correct a drawing by means of resetting an end point in the same way as a polygonal mode by giving relationship as a polygonal graphic to respective end point position data at the time of correcting the triangular or rectangular polygonal graphic. CONSTITUTION:For correcting the resetting of the end points in the rectangular graphics P1-P4 drawn at the linear mode by holding the shape attributes, 'group setting' is selected from a command menu, the respective end points P1-P4 are designated by cursors 11a and 11b and an execution key is depressed. Thus, addresses which are connected next, are written into the respective memory areas of the end points P1-P4 as extension data, and the respective position data are related as data of one rectangular graphic. When 'end point resetting' is selected from the command menu and the end point P4 is extensively shifted to P4', for example, two sides P1-P4 and P3-P4 are shifted in parallel in a state where they succeed the rectangular shape attributes.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a drawing correction method in a CAD drawing apparatus, and more specifically, it can correct a polygonal figure drawn in a straight line mode in the same manner as a figure drawn in a polygonal mode. The present invention relates to a drawing correction method in a CAD drawing apparatus that can be performed.

[0002]

2. Description of the Related Art CAD (Computer aided)
In order to draw a polygonal figure such as a triangle or a rectangle in design, there are usually a method of selecting a straight line mode as a drawing command and a method of selecting a triangle mode or a rectangle mode.

In the case of the straight line mode, a starting point and an ending point are sequentially designated by a cursor, and a desired triangle or rectangle is drawn while drawing a line between them. In this case, the start point data and the end point data are stored in the memory as a straight line database.

On the other hand, for example, when the triangle mode or the rectangular mode is designated, if the triangle is a triangle, the position of each end point (vertex) of the triangle is designated by a cursor, and a triangle formed by a temporary line called a rubber band is designated. Is displayed and the execution key is pressed to fix the triangle figure, and the end point position data is stored in the memory as a triangle database.

Further, in the rectangular mode, if two points located on the diagonal line are designated by the cursor, a rubber band rectangle including the remaining two points is displayed, and the rectangle is pressed by pressing the execution key. The figure is determined, and its end point position data is stored in the memory as a rectangular database. Strictly speaking, a rectangle does not include a square, but it goes without saying that a square can also be drawn.

[0006]

As described above, FIG. 3 shows the linear mode, the rectangular mode, and the triangular mode (hereinafter, these modes are referred to as polygonal modes) for convenience of explanation.
As shown in (a), a desired rectangle abcd or triangle xyz can be drawn on the screen.

However, even if the figures are the same in appearance, when the correction function is used to reset the end points of the drawings without losing their geometrical attributes, the following problems occur. .

That is, in FIG. 3 (a), the thick line figure a
If bcd and xyz are original drawings before correction, and if they are drawn in the polygonal mode, one of them, for example, the end point b or the end point x is designated by the cursor, and the arrow shown in the figure By shifting in the enlargement direction as described above, it is possible to correct the rectangle ABCd and the triangle Xyz while continuing the geometrical attributes (rectangle and triangle) of the original drawing.

In this example, the correction is performed in the enlargement direction, but similarly, by resetting the end points, it is possible to perform reduction or equal-scale correction without losing the attribute.

On the other hand, in the case of drawing in the linear mode, even if the end point b and the end point x are designated by the cursor to move them to the positions B'and X ', for example, FIG. As shown in b), only one side B'-c, X'-z to which the end point belongs moves, and the enlargement, reduction, or equal-magnification is performed in the state where the geometric attribute is inherited as described above. The fix could not be made.

[0011]

SUMMARY OF THE INVENTION The present invention has been made to solve the above-mentioned problems, and its structural feature is that at least a linear mode and a polygonal mode including a triangular mode and a rectangular mode are provided as drawing commands. When modifying a polygonal figure drawn on the screen in the same polygonal mode, use the cursor to select one of the end points (vertices).
In the drawing correction method in the CAD drawing apparatus, which can be enlarged, reduced, or corrected to the same size graphic by inheriting the geometrical attribute of the figure, by designating and shifting it in an arbitrary direction and resetting the end point position, When correcting a triangular or rectangular polygonal figure drawn on the screen in the straight line mode, by giving a group setting command to the same figure, between the end point position data stored in the memory The purpose is to make the drawing as a polygonal figure relevant and to correct the drawing by resetting the end points as in the polygonal mode.

[0012]

According to the above construction, even if a polygonal figure is drawn in the straight line mode, each end point position data of the figure is linked as one figure data by giving a group setting command. become.

Therefore, similarly to the figure drawn in the polygon mode, it is possible to correct the drawing by resetting the end points while inheriting the shape attribute.

[0014]

DESCRIPTION OF THE PREFERRED EMBODIMENTS FIG. 1 shows an example of a CAD drawing device used in the present invention. According to the drawing, the drawing apparatus includes a CAD main body 10, a digitizer 20 having a mouse 21 for moving a cursor, selecting a command and executing the command, drawing data created in each drawing mode, system parameters, and editing data. And a memory 30 formed of, for example, a hard disk.

The CAD main body 10 has a display screen composed of, for example, a CRT or a plasma display, and in this case, the display screen is divided into a drawing area 10a and a command menu display section 10b.

Here, the linear mode is selected from the drawing commands with the mouse 21, and the vertical cursor 1 is selected with the mouse 21.
1a, the horizontal cursor 11b is moved to specify the starting point P1, and then the ending point P2 is specified to draw a straight line P1-P2 vertically downward.

Next, a straight line P2-P3 starting from P2 and ending at P3 is drawn horizontally to the right, and a straight line P3-P4 starting from P3 and ending at P4 is drawn straight P1-P2.
Draw vertically upward with the same length as, and finally point P
It is assumed that a straight line connecting 4 and P1 is drawn to draw a rectangle like a thick line in the drawing.

With the drawing of this rectangle, its end points P1 to
Each position data of P4 is memory 3 as a straight line database
It is stored in 0, but FIG. 2 schematically shows a state in which each position data is stored in addresses 1 to 4.

Since this rectangular figure is drawn in the straight line mode, in order to modify the end point resetting while maintaining its shape attribute, after selecting "set group" from the command menu, the cursor 11a, The end points P1 to P4 are designated by 11b, and the execute key is pressed. In addition, each end point P
1 to P4 are not specified for each end point P1
A group setting command may be given by enclosing ~ P4 in one frame.

As a result, as illustrated in FIG. 2, an address to be connected next is written as extension data in each memory area of the end points P1 to P4, and each position data is associated as one rectangular figure data. It will be. It should be noted that instead of connecting by addresses, the same flag may be set as the extension data of the memory areas of the grouped end points, for example.

Therefore, when "reset end point" is selected from the command menu and, for example, the end point P4 is specified and this point is expandedly moved to the position P4 'as shown by the arrow in the figure, the end point P4 is changed. The two adjacent sides P1-P4 and P3-P4 both move in parallel while inheriting the rectangular shape attribute.

That is, the coordinates of the point P4 'are (X4', Y
4 '), the end point P1 becomes the point P1' (X1, Y
4 ') and the end point P3 is the point P3' (X4 ', Y
It will move to 3).

Although the above embodiment has been explained mainly by taking a rectangle as an example, even if a triangle drawn in the straight line mode is similarly set as a group, the correction of the end point resetting can be performed while maintaining its geometric attribute. Can be done. A command for canceling the group is prepared in this drawing device, and each end point data can be arbitrarily returned in the straight line mode.

[0024]

As described above, according to the present invention, even if a triangle or a rectangle is drawn in the straight line mode, the end point data of each of them has a relevance as one figure if necessary. In addition, the effect that the correction can be performed in the state where the geometrical attribute is inherited is exhibited.

[Brief description of drawings]

FIG. 1 is a schematic diagram showing an example of a CAD drawing device applied to the present invention.

FIG. 2 is a schematic diagram showing a storage state of each end point data in a memory in the embodiment of the present invention.

FIG. 3 is an explanatory diagram for explaining a conventional problem when resetting an end point.

[Explanation of symbols]

 10 CAD Main Body 10a Drawing Area 10b Command Display Area 11a, 11b Cursor 20 Digitizer 30 Memory

Claims (1)

[Claims] 1. A drawing command comprising at least a straight line mode and a polygon mode including a triangle mode and a rectangular mode, and a cursor is used for modifying a polygon figure drawn on the screen in the polygon mode. By specifying any one of the end points (vertices) and shifting it in any direction and resetting the end point position, the geometric attribute of the figure is inherited and enlarged or reduced or modified to a normal size figure. In a method for correcting a drawing in a CAD drawing apparatus capable of performing, when correcting a triangular or rectangular polygonal figure drawn on a screen in a straight line mode, a group setting command is given to the same figure to obtain a memory. The relationship between the end point position data stored in the table is given as a polygonal figure, and the drawing can be modified by resetting the end points as in the polygon mode. CAD which is characterized in that the function
Drawing correction method in drawing device.