JPH08161359A - Method for automatically editing dimension lines - Google Patents

Abstract

PURPOSE: To provide a method for automatically editing dimension lines which efficiently edits the arrangement of dimension lines in a CAD draft. CONSTITUTION: Dimension lines in the draft are grouped by the optional plural dimension lines, the position of the dimension auxiliary line of the dimension line and the position of the dimension line are stored for each dimension lines 001 to 005 drafted within the group. When the dimension line 003 is added, the added dimension line is drafted at the part where an dimension line already exists by referring to the storage in the group, and the dimension lines which already exist are successively moved to the next positions of the dimension lines which already exist. At the time of moving a dimension line to a part where any dimension line which already exist does not exist at last, the dimension line is arranged in accordance with an interval between the dimension lines in the group.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a dimension line automatic editing method for arranging and editing a dimension line on a drafted drawing at an optimum position in a computer-aided design support system (CAD).

[0002]

2. Description of the Related Art In recent years, design in the fields of electricity, machinery, architecture, etc. has been widely performed by CAD using a computer.

There is an apparatus and method for automatically generating a dimension line on a drawing in order to simplify the drawing work using the CAD.

For example, in Japanese Unexamined Patent Publication No. 62-145370, dimension line data is extracted from a memory in which graphic data is stored, and the dimension line data is grouped according to direction, and the dimension is closer to the drawing image. Automatically generate lines,
It is to be placed.

Further, in Japanese Patent Application No. 3-240879, the dimension lines are automatically determined according to the size of the dimension value in the design drawing, and the dimension lines are automatically generated. If the dimension line overlaps with other dimension lines or figures, verify each dimension line one by one and rearrange the position of the dimension line according to the change rule that has been set in advance. We are automatically creating and editing.

[0006]

However, according to the method disclosed in Japanese Patent Laid-Open No. 62-145370, the dimension line is not desired to be drawn, for example, the dimension line is overlapped or a comment is made on the drawing. Since the dimension lines are automatically generated even in a place where it is not desired to draw, the dimension lines overlap with each other, and the finished product cannot be said to be preferable.

In Japanese Patent Application No. 3-240879, the dimension lines are examined by checking the overlapping of figures and other dimension lines for each dimension line and avoiding the overlapping. Repeated verification for each time requires a lot of time, and in the case of complicated drawings, it may not be possible to eliminate the overlap in any way.In such a case, this verification is required. There is a problem such as an infinite loop state that does not end.

Further, in any of the above, if the automatically generated dimension line is different from the one intended by the designer,
It may be more troublesome to modify and edit the automatically generated dimension line than to fill the dimension line by the designer from the beginning.

Therefore, an object of the present invention is to efficiently edit the layout of dimension lines in the case of adding dimension lines to the dimension lines drawn by the designer or conversely deleting them. It is to provide an automatic dimension line editing method that can be performed.

[0010]

According to the present invention for achieving the above object, dimension lines in a drawing are grouped for each of a plurality of arbitrary dimension lines, and for each dimension line drawn in the group, The position of the dimension auxiliary line and the position of the dimension line of the dimension line is stored, and when the dimension line is added, the dimension added to the existing dimension line portion in the group with reference to the memory. When you draw a line, the existing dimension line moves its position sequentially to the existing dimension line position, and finally when you move the dimension line to the part where there is no already drawn dimension line, the dimension in the group The dimension line automatic editing method is characterized in that the dimension lines are arranged according to the line spacing.

Further, according to the present invention, in the dimension line automatic editing method, when a dimension line is deleted, of the remaining dimension lines in the group, the closest dimension line to the deleted dimension line is placed in order. , Is moved to the position where the deleted dimension line exists.

Further, according to the present invention, in the automatic dimension line editing method, when a prohibited area is provided in an arbitrary portion of the drawing and a dimension line is drawn in the prohibited area, the prohibited area is located at a close position outside the prohibited area. , The dimension lines are arranged at positions separated by the dimension line interval in the group.

Further, according to the present invention, when the dimension lines are arranged according to the dimension line spacing within the group, the dimension line spacing is determined from the position of each dimension line within the group, and the spacing value has a high frequency. The dimension line is arranged according to

[0014]

According to the present invention configured as described above, the dimension lines on the drawing drawn by the designer using the CAD system are grouped by a plurality of dimension lines and exist in each group. The positions of the plurality of dimension lines and the positions of the dimension extension lines attached to the dimension lines are stored, and when the dimension line is added, the added dimension line is stored based on this memory. In the group with the added dimension line, it is arranged at the position of the dimension line that already exists, and it is sequentially rearranged on the stored dimension lines in the group. Then, the dimension lines to be finally rearranged in the place where there is no dimension line are arranged according to the interval for each dimension line guided from the stored position of each dimension line. As a result, the additional editing of the dimension line is automated without basically moving the dimension line previously drawn by the designer as intended by the designer and without interfering with other dimension lines.

Further, according to the present invention, when the dimension line is deleted, the dimension line which is not deleted in the same group is moved to the position where the deleted dimension line exists, so that the drawing can be more easily seen. can do.

Further, in the present invention, by providing the dimension line prohibition region on the drawing, when the dimension line prohibition region is arranged in a portion without the dimension line, the dimension line prohibition region is not arranged. If there is a dimension line to be arranged in this dimension line prohibition area, according to the interval for each dimension line derived from the position of each of the stored dimension lines from the closest position outside this dimension line prohibition area. Rearrange.

Further, according to the present invention, when arranging the dimension lines according to the dimension line spacing within the group, the spacing is obtained from the stored positions of the dimension lines and based on the most frequent spacing value. By arranging the dimension lines with each other, the intervals between the dimension lines are less varied between the dimension lines, and a drawing that is easy to see is completed.

[0018]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described below with reference to the accompanying drawings.

FIG. 1 is a block diagram of a CAD system to which the present invention is applied, including a CPU 1 that operates according to a program, a drawing data storage unit 2 such as a hard disk or a magnetic tape in which drawing data is stored, and a dimension line described later. RAM3, CAD where files are stored
ROM4 that stores the basic program of the system,
The input / output interface (I / F) 5 controls the output to the CRT 6 and a printer (not shown), and the input from the keyboard 7 and the touch pen 8.

The CPU 1 controls the drawing function as the CAD system and controls the dimension line editing of the present invention by the procedure provided by the program. The drawing data storage unit 2 stores the drawing data drawn by this CAD system or another CAD system, and the characters such as each figure, dimension line, dimension extension line, dimension value and comment on the drawing are displayed on the screen. It is stored together with the coordinate position data of.
The RAM 3 temporarily stores the position data such as the dimension line and the dimension auxiliary line from the drawing data at the time of editing the dimension line described later. For this temporary storage, a non-volatile storage means such as a hard disk may be used instead of the RAM. The CRT 6, the keyboard 7 and the touch pen 8 are input / output means for drawing a graphic, and are transmitted to the CPU 1 by the input / output interface 5 so that the input from the touch pen or the keyboard is converted into a graphic C.
Pictured on RT6. As input / output means, there are various input / output means such as a mouse and a pen-touch type tablet board in addition to a touch pen, and thus these input / output means are appropriately used.

When the dimension line automatic editing method of the present invention is carried out by this CAD system, first, the designer draws an arbitrary drawing and fills in the required dimension line, or the drawing data storage unit 2 Drawing data is called up on the CRT. Then, the designer designates a plurality of arbitrary dimension lines for grouping as shown in FIG. 2, or decides a group name to create dimension lines, group them, and draw dimension lines. Specify the prohibited dimension line area. By allowing this grouping to be defined as a group arbitrarily, for example, if the dimension lines are drawn in the same direction but there are differences in the spacing between the dimension lines, another group will be created. Since it becomes possible to increase the degree of freedom such as the portion where the dimension line is desired to be finely defined or to be filled in at a wide interval, each can be managed for each group.

With respect to the plurality of dimension lines divided into groups, the position of the dimension line on the graphic data, the position of the dimension extension line of the dimension line, the position of the dimension character and the size of the character are the drawing data for each group. It is further extracted and stored in the RAM 3 as a dimension line file together with the position of the dimension line prohibited area.

The contents stored in this dimension line file are as follows:
In order that the positions of the dimension line and the dimension extension line can be known according to the coordinates on the CRT6 screen, for example, as shown in FIG. 3, the coordinates of the reference points of each group on the coordinates, and the identification numbers of the respective dimension lines are grouped. For each dimension line, the reference coordinates of the extension line of the dimension line and its length, the reference coordinates of the dimension line and the dimension line angle, and the dimension character position, and the figure with the dimension line drawn For example, the reference point of data. In the present embodiment, the coordinate system on the CRT is a three-dimensional coordinate, so each point in FIG. 3 is represented by (X, Y, Z), but of course a two-dimensional coordinate system is also possible. Often, the coordinates match the CAD system used.

FIG. 4 shows a group of drawings for performing dimension line editing work. FIG. 4a is a figure before editing, and the reference point of this group is defined to be the same as the reference point of the figure.
For each dimension line, an identification number (ID) from 001 to 005 is set in the dimension line file,
For each identification number, the dimension extension line is 2 for one dimension line.
Since the coordinates and length of each base point, the coordinates and angles of the start and end points of the dimension line, and the coordinates of the dimension character position are stored as a dimension line file as described above (see FIG. 2). ). The coordinates of the dimension line prohibited area are also stored as described above.

When there is an additional change in the dimension line, here, as shown in FIG. 3B, when the identification number (003 ') of the dimension line is added in association with the change in the figure, the dimension is changed. The line file is referred to, the dimension line of (003 ') is added to the position where the dimension line of the identification number (004) of FIG. 4a was present, and the dimension line (004) is moved to the position of (005). Let The dimension line (005) is (00
Of the intervals between the dimension lines 1) to (004), they are arranged outside the dimension line (004) in accordance with the largest spacing value.

If there is a dimension line prohibited area at the position of addition or rearrangement, the dimension lines (003) and (0
04) between the shaded areas (the figure also includes the figure)
Is the prohibited area, but the added dimension line ((0
03 ')) is added by removing this prohibited area. The same applies to the case of relocation. If there is a prohibited area, remove the prohibited area, and if there is already a dimension line, at that position, or if there is no dimension line, prohibit it. The area is rearranged at the same interval as the dimension line.

After the rearrangement is completed, the dimension line file is updated, the identification number is reassigned, and (003 ') becomes (0
04), (004) is changed to (005), and so on.

In the present embodiment, when the dimension lines are rearranged in the portion where there is no dimension line, the dimension lines are rearranged in accordance with the spacing value having the highest frequency as the spacing value in the group. However, the interval at the time of this rearrangement is not limited to this, and for example, the interval value at the time of the rearrangement may be determined in advance and arranged according to this, or the size within the group. You may rearrange by the average value of line spacing.

As described above, when a dimension line is added, the dimension line file is referred to, the dimension line to be added is drawn in the portion of the dimension line already drawn by the designer, and the portion is added to that portion. By sequentially moving and rearranging the existing dimension lines, the dimension lines can be added and changed so that they do not overlap with other dimension lines or between the dimension line and the figure. This is because the dimension line drawn by the CAD system by the designer is usually the one except that the designer intentionally draws the dimension lines on top of each other.
Since the dimension lines are not drawn on top of each other and the area where figures and dimension lines should not be drawn is removed, the dimension lines once written by the designer should be registered in a file as described above. Even if additional dimension lines are entered based on the dimension line file, the dimension lines and the dimension lines to be moved and rearranged do not overlap. Moreover, since the dimension lines are rearranged from the dimension line file in this way, it is not necessary to verify and obtain the positional relationship for each dimension line one by one as in the conventional case, and the processing time for the rearrangement is extremely high. It will be done in a short time.

Contrary to the above, when the dimension line is deleted, as shown in FIG. 4c, when the dimension line (003) is deleted, the position where the dimension line (003) was present is the same as above. (004) is rearranged to (004) at the position of (004), and after the rearrangement is completed, the dimension line file is updated and the identification numbers are reassigned in order. Of course, in the case of deleting the dimension line, if there is no need for such editing, the editing work itself need not be performed.

Next, the operation of the dimension line editing described above will be described with reference to the flow charts shown in FIGS. 5 and 6.

First, as shown in FIG. 5, a drawing is created and reference points and dimension lines are grouped. To this end, first, a drawing creation layer is defined, and at this time, the origin coordinates of the normal drawing are set to (0, 0, 0) (S1). Next, drawing data in which a dimension line or the like has already been entered is called from the drawing data to define a figure for dimension line editing, or a dimension line is drawn together with the creation of the figure (S2). The reference point (usually the coordinate origin) of the defined figure is defined (S3), the dimension line is defined for grouping (S4), and each group is registered in a file as described above. (S5).

Next, in the editing operation, as shown in FIG. 6, first, the drawing to be changed is called, the drawing to be changed is designated (S10), and the figure is changed by the designer (S11). ), And by the instruction to change the dimension line,
As mentioned above, the dimension line moves as the shape changes,
It is rearranged (S12), the dimension line is redefined (regrouped) if necessary (S13), and the file is updated (S14).

More specific drawing drawings in which the dimension lines have been edited as described above are shown in FIGS. 7 and 8.

FIG. 7 is an example of a tooling diagram of a machining center of an opportunity machining facility. The hatched portion is the dimension line prohibited area, and the dimension line can be entered in other areas. You can draw a line. Further, FIG. 8 is an assembly drawing, in which the comment area is a prohibited area, and the dimension line can be entered in the area other than the comment area. In this figure, when the dimension line is added at the position A, the dimension line B
Moves to the dotted line. When a dimension line is placed at the position D, it is added by referring to the dimension line C. Even in such a complicated drawing, the dimension lines can be added and changed without overlapping of the dimension lines.

[0036]

As described above, according to the present invention,
Group multiple dimension lines, store the position of dimension lines and the position of extension lines in the group, and when adding dimension lines, add new dimension lines to existing dimension line parts Since it was decided to move and relocate the dimension lines that existed in the part in order and to place them according to the intervals of the dimension lines that already exist in the part where there is no dimension line, when changing and editing the dimension lines, group them. Since the editing work is performed on the basis of the memory, it is not necessary to extract and search the position of each dimension line on the drawing one by one, and a faster dimension line editing process can be performed. Also,
When a dimension line is added, the dimension line is basically added to the existing dimension line portion, so that the dimension line can be added and edited without overlapping of dimension lines or unnecessary overlapping with a figure.

When deleting the dimension line, the same as above.
Since it is decided that another dimension line is moved to an existing dimension line, the dimension line can be deleted and edited without causing the dimension lines to overlap with each other or unnecessary overlap with the figure.

Further, since the dimension line prohibited area is arbitrarily designated, the dimension line is not drawn in a portion other than the figure where a comment or the like is inserted, and the prohibited area is not designated in the figure. You can enter the dimension line with.

Further, according to the present invention, when the dimension line is inserted in a portion having no dimension line, the dimension lines are arranged according to the spacing having the highest frequency of spacing values between the dimension lines. The space density of a plurality of dimension lines can be made substantially the same, and the resulting drawing is easy to see.

[Brief description of drawings]

FIG. 1 is a block diagram of a CAD system used in an embodiment to which the present invention is applied.

FIG. 2 is a drawing of grouping of dimension lines in the above embodiment.

FIG. 3 is an example of a dimension line file in the above embodiment.

FIG. 4 is a diagram for explaining dimension line editing in the above embodiment.

FIG. 5 is a flow chart for explaining the flow of the operation of dimension line editing in the above embodiment.

FIG. 6 is a flowchart for explaining a flow of an operation of dimension line editing in the above embodiment.

FIG. 7 is a specific example of a drawing drawing edited according to the above embodiment.

FIG. 8 is a concrete example of a drawing drawing edited according to the above embodiment.

[Explanation of symbols]

1 ... CPU, 2 ... Drawing data storage unit, 3 ... RAM,
4 ... ROM, 5 ... input / output interface, 6 ...
CRT, 7 ... keyboard, 8 ... touch pen.

Claims (4)

[Claims] 1. A dimension line in a drawing is grouped by arbitrary plural dimension lines, and for each dimension line drawn in the group, the position of the dimension extension line and the position of the dimension line are determined. When the dimensional line is stored and added, the additional dimensional line is drawn in the existing dimensional line portion in the group with reference to the memory, and the existing dimensional line already has its position in sequence. A dimension characterized by placing dimension lines according to the dimension line spacing within the group when moving to the dimension line position and finally moving the dimension line to the part where there is no already drawn dimension line Automatic line editing method. 2. In the automatic dimension line editing method, when a dimension line is deleted, of the remaining dimension lines in the group, the one closest to the deleted dimension line is deleted in order. 2. The dimension line automatic editing method according to claim 1, wherein the dimension line is moved to a position where the designated dimension line exists. 3. In the automatic dimension line editing method, when a prohibited area is provided in an arbitrary portion on the drawing and a dimension line is drawn in the prohibited area, the group is placed at a close position outside the prohibited area. The dimension line automatic editing method according to claim 1 or 2, wherein the dimension lines are arranged at positions spaced apart by the dimension line intervals in the inside. 4. When arranging the dimension lines according to the dimension line spacing within the group, the spacing between the dimension lines is obtained from the position of each dimension line within the group, and the dimension value is determined according to the frequency of the spacing value. A line is arrange | positioned, The dimension line automatic edit method as described in any one of Claims 1-3 characterized by the above-mentioned.