JPH06215052A - Method and device for dimension line generation - Google Patents

Abstract

PURPOSE:To easily and properly enter dimension lines in series format through easy operation while automatically changing intermediate symbols and to perform proper undoing. CONSTITUTION:A dimension generation part 15 generates dimension line data based on the measurement point and dimension position information from a measurement point indication part 13 and a dimension position indication part 14. On the basis of the dimension line data obtained by the dimension generation part 15, an intermediate symbol processing part 16 changes a terminal symbol corresponding to the dimension auxiliary line of the dimension line data into a specific intermediate symbol when it is decided that at least one of dimension auxiliary line intervals on both sides of a dimension auxiliary line positioned at an intermediate part of the series entered dimension line is narrower than a specific value. A write/rewrite control part 19 pushes the last corresponding dimension line data and blank data to an undoing buffer 18 each time the dimension line data is newly written or rewritten in a memory 17, and an undoing control part 20 pops the stacked data in sequence each time undoing operation is performed to write the data back onto drawing data.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION The present invention relates to CAD (computer-aid).
The present invention relates to an ed design) system, and more particularly, to a dimension line creating method and apparatus for appropriately writing dimension lines in a drawing data created by a CAD system in a serial entry format.

[0002]

2. Description of the Related Art When using a CAD system, C
Ordinary vertical dimension in drawing data created by AD system (draws auxiliary dimension line perpendicular to dimension line)
It is not uncommon to want to make continuous writing, such as diagonal dimension (drawing the dimension auxiliary line diagonally with respect to the dimension line) in series, that is, in the serial entry format. In a conventional CAD system, when automatically creating standard dimension lines that allow serial entry of normal vertical dimensions and diagonal dimensions in the serial entry format, the serial entry is instructed in advance and the first dimension 1. Indicate the position of the second measurement point and the dimension line, and after writing the first dimension line, indicate the next measurement point (for example, the third measurement point following the second measurement point), The dimension line is entered in the serial entry form by writing the next dimension line in series on the first dimension line and sequentially repeating the instruction of the next measurement point as necessary.

[0003]

As described above, in the conventional CAD system, although the dimension lines can be automatically created in a serial form, basically, a single dimension such as a vertical dimension and an oblique dimension is used. Since the line was processed repeatedly, even when there were a large number of measurement points in a narrow area, the terminal symbols on each dimension line were all the same arrow symbol, which could be unsightly. In order to avoid this, the terminal symbol in the middle of the dimension line of serial entry is made into a simplified intermediate symbol. In this way, in order to make the terminal symbol in the middle of the dimension line of serial entry into the simplified intermediate symbol,
The operator had to draw the dimension lines individually or individually change the terminal symbols in the middle part, and the automatic creation function of serially entered dimension lines could not be effectively utilized. Therefore, in such a case, the operator has to perform an extremely complicated operation.

The present invention has been made in view of the above circumstances, and it is possible to easily and appropriately perform automatic change of intermediate symbols and enter dimension lines in a serial form by a simple operation. Moreover, it is an object of the present invention to provide a dimension line creating method and apparatus that can perform appropriate undo and can significantly reduce the burden on the operator.

[0005]

The dimension line creating method according to the present invention requires a selecting step for selecting a series of dimension lines and a first dimension line entry when drawing dimensions on drawing data. A basic point designating step for designating a basic point including a measurement point on a drawing, a dimension position designating step for designating a position of a dimension line on which a dimension is to be entered, and a drawing data stored and displayed, The basic writing step of writing the dimension data based on the instructions of the measuring point designating step and the dimension position designating step and stacking the empty data in the undo buffer, and other measuring points on the drawing necessary for drawing the dimension line. And an additional point instruction step for sequentially instructing the drawing data stored and displayed on the drawing data based on the instruction by the additional measurement point instruction step. In addition to the dimension line written in the basic writing step in a serial form, and rewriting the terminal symbol corresponding to at least a predetermined part of the new intermediate dimension extension line of the dimension line to be serially written into the predetermined intermediate symbol. While writing the dimensional data about the other measurement points,
The additional writing step that stacks the data of the size before addition to the undo buffer and the empty data, and the contents stacked in the undo buffer are sequentially displayed and stored in the drawing data for each predetermined undo operation. And an undo processing step of returning to.

A dimension line creating apparatus according to the present invention is a dimension line creating apparatus for entering dimensions on drawing data, for storing a data storage unit for storing drawing data and history data for undo processing. Storage means including an undo buffer, command input means for inputting commands including dimension line serialization commands, basic points and additional dimensions including measurement points on the drawing required for writing the first dimension line Point indicating means for sequentially indicating additional measurement points on the drawing necessary for drawing a line, and dimensional position indicating means for indicating the position of the dimension line on the drawing to be dimensioned are displayed and On the drawing data stored in the storage unit of the storage unit, based on the instruction by the point designating unit and the dimension position designating unit, a new dimension line to be serially written is added. The terminal symbol corresponding to at least a predetermined part of the intermediate dimension auxiliary line is rewritten to a predetermined intermediate symbol to sequentially write the dimension data, and the dimension before writing the data in the data storage unit in the undo buffer. Writing / rewriting means for stacking the data and empty data, and the contents stacked in the undo buffer by a predetermined operation are sequentially displayed on the drawing data stored in the data storage section. And an undo control means for controlling to return.

[0007]

In the dimension line creating method and apparatus of the present invention, when a dimension is entered on drawing data, serial entry of dimension lines is selected, and measurement points on the drawing necessary for entry of the first dimension line are included. Instructing the basic point, instructing the position of the dimension line on the drawing where dimensions should be entered, writing the dimension data based on the instruction on the displayed and stored drawing data, and empty data in the undo buffer Stack, and sequentially indicate other measurement points on the drawing required for drawing the dimension line, and add them in series form to the dimension line already written based on the instruction on the displayed and stored drawing data. , And rewrite the terminal symbol corresponding to at least a prescribed part of a new intermediate dimension extension line of the dimension line to be entered in series to a prescribed intermediate symbol, and write the dimension data for the other measurement points. At the same time, the data of the dimension before addition and empty data are stacked in the undo buffer, and the contents stacked in the undo buffer are sequentially displayed and stored on the drawing data for each predetermined undo operation. Since it is returned, it is possible to easily and appropriately change the intermediate symbol automatically and appropriately, and to enter the dimension line in a serial format, and also to perform an appropriate undo, which burdens the operator. Can be significantly reduced.

[0008]

Embodiments of the present invention will be described below with reference to the drawings. FIG. 1 shows a schematic configuration of a CAD system incorporating a dimension line creating apparatus according to an embodiment of the present invention. In the CAD system of the present embodiment, when drawing a dimension line in the drawing data in the serial entry format, the first and second measurement points for measuring the dimension, the position of the dimension value on the drawing, and the additional measurement point are designated. Then, on the displayed and stored drawing data, based on the above-mentioned instruction, the data of the dimension line in the serial format for the adjacent plural measurement points is provided on the condition that the dimension extension line interval is narrower than the predetermined value. Only when applicable, it is possible to sequentially write while changing the terminal symbol of the intermediate portion of the serially written dimension line to a predetermined intermediate symbol, and to appropriately perform the undo operation when the dimension line is written by mistake.

The CAD system shown in FIG. 1 includes a CAD processing unit 1, an input device 2, a display 3, an output device 4 and a storage device 5. The CAD processing unit 1 is a CPU
A central processing unit (not shown) is included, and CAD processing including dimension line creation processing is executed. The input device 2 includes an operation input device such as a keyboard and a pointing device such as a mouse, and inputs operation input information by an operator and other external information necessary for CAD processing to the CAD processing unit 1.
To enter. The display 3 displays necessary information such as processed image information by the CAD processing unit 1 and information related to input by the input device 2. The output device 4 includes a plotter, a printer, or the like, and outputs the image information processed by the CAD processing unit 1 as a hard copy. The storage device 5 is composed of, for example, a disk device such as a hard disk device, operates in association with the CAD processing unit 1, and stores data such as image information before processing, after processing, and during processing as necessary. .

In this case, the CAD processing unit 1 uses the normal CA.
In addition to the configuration for executing the D process, the display control unit 11 and the command input unit for executing the dimension line creating process including the automatic changing function of the intermediate symbols in the serial writing and the undo function according to the embodiment of the present invention. 12, a measurement point designating section 13, a dimension position designating section 14, a dimension creating section 15, an intermediate symbol processing section 16, a memory 17, an undo buffer 18, a writing / rewriting control section 19 and an undo control section 20 are included.

The display controller 11 controls the display on the display 3. Under the control of the display control unit 11, drawing data and the like are displayed on the screen of the display 3. The command input unit 12 performs a process for allowing an operator to input a command including a dimension line writing command by an interactive operation with the screen of the display 3, for example. The command input unit 12 also performs processing for enabling functions such as serial entry of dimension lines and automatic change of intermediate symbols in serial entry through interactive operation with the screen of the display 3. Therefore, the command input unit 12 controls the display control unit 11 as necessary.

The measuring point designating section 13 functions at least when the dimension line writing command is input by the command input section 12, and, for example, enters a dimension line on the drawing by an interactive operation with the screen of the display 3. At the time of performing, processing for causing the operator to instruct the first and second measurement points, that is, the basic points and the additional measurement points is performed. For this reason, the measurement point designating unit 13 also includes the display control unit 1 as necessary.
Control 1 When the dimension line entry command is an angle dimension entry command, this measurement point instruction unit 13
Is, as a basic point, in addition to the first and second measurement points,
It also performs processing for instructing the center point by the operator.

The dimension position designating section 14 functions at least when the dimension line writing command is input by the command input section 12, and, for example, enters a dimension line on the drawing by an interactive operation with the screen of the display 3. A process for causing the operator to instruct the position of the dimension line when performing is performed. Therefore, the dimension position designating section 14 also controls the display control section 11 as necessary. The dimension creating unit 15 uses the measurement point designating unit 13 and the dimension position designating unit 14 based on the measurement point and dimension position information obtained by the measurement point designating unit 13 and the dimension position designating unit 14.
For example, the dimension line data in the serial entry format for the measurement points designated by is sequentially created.

Based on the dimension line data obtained by the dimension creating section 15, the intermediate symbol processing section 16 determines whether or not the distance between the dimension auxiliary lines drawn from the measurement points is narrower than a predetermined value, that is, the dimension line length. Is smaller than the predetermined value, and if at least one of the dimension extension line intervals on both sides of the dimension extension line located in the middle of the serially entered dimension line is narrower than the predetermined value, When it is determined, the terminal symbol for the dimension extension line in the middle portion of the dimension line data created by the dimension creating unit 15 is sequentially changed to a predetermined intermediate symbol such as a slash “/” or a dot “·”. Perform processing to change. The predetermined value for determining the space between the dimension auxiliary lines is fixedly set to, for example, 9 mm or 10 mm in consideration of the length of a size character having a general size value. The predetermined value may be appropriately set based on the actual length of the dimension character area at that time.

The memory 17 stores information including CAD drawing data to be displayed by the display control unit 11. The storage contents of the memory 17 are transferred to the storage device 5 as needed. The memory 17 may share the memory used in the normal CAD processing in the CAD processing unit 1. The undo buffer 18 is a so-called pushdown stack or FILO (first in, last ou
t) A buffer used as a stack, each time new writing / rewriting of the dimension line data to the memory 17 is performed.
The corresponding dimension line data and empty data before writing / rewriting are pushed, and the stacked data is sequentially popped for each undo operation, and written back to the drawing data that is displayed and stored. Be used for. The undo buffer 18 may use a part of a memory common to the memory 17.

The writing / rewriting control unit 19 adds the dimension line data obtained by the dimension creating unit 15 and the intermediate symbol processing unit 16 to the drawing data displayed on the display 3 and stored in the memory 17 as necessary. And rewrite the data already written, and sequentially write. As will be described later in detail, the writing / rewriting control unit 19 also controls rewriting of the drawing data displayed on the display 3 and stored in the memory 17 during the undo processing.

The writing / rewriting control section 19 writes the dimension line data for the basic point obtained by the dimension creating section 15 when designating the basic point, and for each instruction of the measuring point after the instruction of the second measuring point. , The dimension creating unit 15 and the intermediate symbol processing unit 1 on the displayed and stored drawing data.
In addition to the sequential writing / rewriting of the dimension line data obtained in step 6, when writing / rewriting the dimension line data in the serial entry format for the designated measurement point, the dimension line data of the designated measurement point The corresponding dimension line data and empty data before the new writing / rewriting are stacked in the undo buffer 18.

The undo control section 20 operates by inputting a predetermined icon by operating the input device 2 interactively with the screen of the display 3 or operating a specific function key set in advance. , The contents stacked in the undo buffer 18 are sequentially written back to the drawing data displayed on the display 3 and stored in the memory 17 for each undo operation.
Therefore, the undo control unit 20 controls the display control unit 11 as needed.

As described above, the writing / rewriting control unit 1
Numeral 9 pushes the corresponding dimension line data and empty data in the state before writing / rewriting to the undo buffer 18 each time the dimension creating unit 15 and the intermediate symbol processing unit 16 newly write / rewrite the dimension line data, and Undo control unit 2
Undo buffer 18 for each undo operation by 0
Pops the data stacked in the serially and writes back to the displayed and stored drawing data.

In the write / rewrite control unit 19 described above,
You may make it perform the process for preventing the dimension auxiliary line data with respect to the same measurement point from overlapping. in this case,
For example, in the case of serial entry format, for the measurement points that are common to the previous dimension line, the previous dimension line data is changed so that the existing dimension line becomes ineffective data, and a new dimension line is added. Write new dimension line data as valid data. For this reason, the writing / rewriting control unit 19 rewrites the data of the dimension auxiliary line as necessary to change the already written dimension auxiliary line from valid data to ineffective data.

The valid data is data that is actually displayed when the drawing data is displayed on the display 3 and is actually drawn when the drawing data is output to the output device 4 such as a plotter or a printer. Is data that is not actually displayed when the drawing data is displayed on the display 3 and is not actually drawn when it is output to the output device 4 such as a plotter or a printer. Even when rewriting the data of the dimension auxiliary line for changing the already written dimension auxiliary line from valid data to ineffective data, the writing / rewriting control unit 19 causes the corresponding dimension line data in the state before writing / rewriting and The empty data is pushed to the undo buffer 18, and the undo controller 20 writes back the data stacked in the undo buffer 18 for each undo operation onto the drawing data.

Next, the operations relating to the dimensional line creation and undo including the automatic change function of the intermediate symbols in the CAD system having such a structure will be described with reference to FIGS.
This will be described in detail with reference to the flowchart shown in FIG. The process shown in FIG. 2 is started as, for example, an interrupt process by command input during a normal drawing or editing operation in the CAD system, the process shown in FIG. 3 is started as a subroutine when writing a dimension line, and the process shown in FIG. 4 is executed. It shall be started as an interrupt process at the time of undo operation. First, in FIG. 2, when an operator gives an instruction to automatically change the intermediate symbol via the command input unit 12 of the CAD processing unit 1 (step S1), and a dimension line creation command by serial entry is selected (step S1). S2), the system is set to the dimensioning mode of serial entry by automatic change of intermediate symbols (step S3).

When the dimension creation mode for serial entry by automatic change of intermediate symbols is entered, the measurement point designating section 1 of the CAD processing section 1
According to 3, the operator gives an instruction of a basic point including the first and second measurement points on the drawing to be measured and entered (for example, in the case of an angular dimension, the basic point also includes the center point). (Step S4). The instruction of the measurement point by the measurement point instruction unit 13 in step S4 is given by
The operator's input is requested via the screen, and the operator performs an instruction operation or the like using the cursor on the screen accordingly.

Next, the dimension / position instructing section 14 instructs the operator of the position on the drawing where the dimension line should be entered (step S5). Similarly to the case of measuring points, the dimension position instructing section 14 is required to be input by the operator through the screen of the display 3,
The operation is performed by the operator performing an instruction operation or the like using the cursor on the screen in response thereto. This step S5
In accordance with the instruction of the position of the dimension line in, the dimension creating unit 15 creates dimension line data for the basic point according to the position of the dimension line instructed in step S5 and the basic point instructed in step S4. When the position of the dimension line is designated in step S5, the writing / rewriting control unit 19 determines the dimension line data about the basic point according to the dimension line position designated in step S5 and the basic point designated in step S4. Is written on the drawing data displayed on the display 3 and stored in the memory 17 (step S6).

Further, the measurement point designating section 13 measures the dimension line, and the operator designates additional measurement points to be entered in series (step S7). In step S7, when the measurement point is designated, the dimension line based on the measurement point and the dimension position input up to that point is generated by the dimension creation unit 15
In addition, the intermediate symbol processing unit 16 analyzes the dimension extension line intervals on both sides of the dimension extension line located in the middle portion of the series dimension line, based on the created dimension line of the serial entry (step S8). Based on this result, the intermediate symbol processing unit 16 further determines whether or not the intermediate symbol should be changed, that is, at least one of the dimension extension line intervals on both sides of the dimension extension line located at the intermediate portion of the series dimension line is set. It is determined whether it is narrower than a predetermined value (step S9).

If it is determined in step S9 that at least one of the dimension extension line intervals on both sides of the dimension extension line located in the middle of the series dimension line is narrower than a predetermined value and the intermediate symbol should be changed, The intermediate symbol processing unit 16 changes the terminal symbols (on both sides) for the dimension extension line to predetermined intermediate symbols (step S10). Step S10
Then, when the change of the intermediate symbol is performed, the writing / rewriting control unit 19 writes the change result of the dimension line and the intermediate symbol added in series to the dimension line for the basic point (step S11). In step S9, the dimension extension line intervals on both sides of the corresponding dimension extension line are both wider than a predetermined value,
If it is determined that the intermediate symbol should not be changed, the process immediately proceeds to step S11, and the writing / rewriting control unit 19
Then, the dimension line added in series to the dimension line for the basic point is written as it is.

When the additional dimension line is written in step S11, it is determined whether or not the serial entry of the dimension line is completed (step S12). If the serial entry of the dimension line is not completed, the process returns to step S7. , Steps S7 to S11 are repeated, and when at least one of the dimension extension line intervals on both sides of the dimension extension line located in the middle portion is narrower than a predetermined value, the terminal symbol in the middle portion of the serially entered dimension line is changed. At the same time, the additional dimension line is written. Step S1
When it is determined in 2 that the dimension line serial writing is finished, the system finishes the dimension line serial writing and shifts to the next processing. Step S6 and step S of FIG. 2 described above.
The dimension writing process in 11 is almost common.
Next, this dimension writing process will be described in detail with reference to FIG.

The writing / rewriting control unit 19 first displays the data on the display 3 and the memory 1 when writing the dimensions.
From the drawing data stored in FIG. 7, the original dimension line data corresponding to the dimension line to be written, that is, the original dimension line data is temporarily fetched (step S21), and the new dimension line is added to this original dimension line data. Corresponding to the part)
Empty data is added and pushed to the undo buffer 18 (step S22). When writing the basic dimensions based on the basic points (in step S5), since the original dimension line data does not exist, the original dimension line data is not fetched in step S21, and only empty data is written in step S22. It is pushed to the undo buffer 18.

Then, the writing / rewriting control section 19 takes in new dimension line data corresponding to the latest measurement point generated by the dimension creating section 15 and processed by the intermediate symbol processing section 16 (step S23). When the writing / rewriting control unit 19 performs the process of validating / invalidating the dimension auxiliary lines when there are overlapping dimension auxiliary lines, the process is performed on the fetched dimension line data in step S23.

Further, by the writing / rewriting control unit 19,
The new dimension line data imported in step S23 is
The drawing data displayed on the display 3 and stored in the memory 17 is written, and the corresponding dimension line data is written / changed (step S24). In this way, the substantially common dimension writing process in steps S6 and S11 is performed.

Further, the undo processing by the undo controller 19 will be described with reference to FIG. Figure 4
The undo process shown in (1) is executed as an interrupt process each time an undo operation is performed via the input device 2.

When the undo operation is performed, the undo controller 20 pops the last pushed data from the undo buffer 18 onto the stack (step S3).
1) Then, the popped data is written as restoration data into the drawing data displayed on the display 3 and stored in the memory 17 via the writing / rewriting control unit 19 (step S32). By writing this restoration data, the corresponding dimension line data in the drawing data that has been displayed and stored until then is restored to the state before the additional writing of the immediately preceding (latest) dimension line data. By repeating this undo operation, the drawing data displayed and stored can be sequentially written to the previous dimension line data as long as there is data stacked in the undo buffer 18 for the corresponding dimension line data. You can restore it to its previous state.

Here, an example of a specific operation in this system will be described in detail. First, C as shown in FIG.
In the menu on the editing screen of the AD system, "Annotation"-
If you select "Execution" (annotation means to enter annotations other than drawing such as dimension lines), a menu as shown in Fig. 6 will be displayed. In this menu, select "Dimension"-"Element" 7) is displayed, a menu as shown in Fig. 7 is displayed, and "Please specify the type of dimension line" is displayed on the prompt line at the bottom of the display 3 screen, for example. This requires the operator to instruct the type of dimension line to be filled. The selection of these menus and the change thereof can be performed by the operator while looking at the editing screen of the display 3
This is done by operating the cursor movement keys or the mouse to move the cursor bar on the menu.

In the menu of FIG. 7, the toggle switch for instructing the parallel / serial entry of dimension lines is set to "OFF". Is displayed), and if “□” before the display of “Date” is displayed,
If is set to "■" and the "Date" toggle is on, set the "Date" toggle to off.
Make sure that “□” is displayed before “Date”. Further, the “intermediate symbol” toggle, which is a toggle switch for instructing on / off of automatic change of the intermediate symbol, is turned on (“■” is displayed before the display of “intermediate symbol”). If it is "■" before the display of "intermediate symbol" and the "intermediate symbol" toggle is on, the "intermediate symbol" toggle is left on. These toggle switches are alternately turned on / off by an operator operating a mouse or the like and operating a click button of the mouse in a state where a desired toggle switch is instructed with a cursor.

In this case, the auxiliary line interval for automatically changing the intermediate symbol is set to 10 mm, for example. That is, according to this setting, when at least one of the distances between the dimension extension lines on both sides of the arbitrary dimension extension line is 10 mm or less, the terminal symbol of the dimension line for the dimension extension line is set to the predetermined intermediate value. The value will be changed automatically. In addition, in the menu of FIG. 7, with the "Date" toggle off and the "Middle sign" toggle on,
"Standard" because horizontal dimension is entered by vertical dimension line
-If you select "Horizontal" (in this case, the vertical dimension line is set as the standard dimension), you will enter the dimension line creation mode.
A menu as shown in FIG. 8 is displayed. Normally, in this menu, when it is displayed, "automatic recognition"-
"Execution" is selected preferentially.

In this state, as shown in FIG. 8, the prompt line "Please indicate the first point" is displayed to request the operator to instruct the first measurement point of the dimension line. To be done. When the first measurement point is specified by operating the mouse etc., the prompt line on the screen will display "Please specify the second point" as shown in Fig. 9. An indication of the second measuring point on the dimension line is required. These first and second measurement points are the basic points for serial entry. Second by operating the mouse etc.
When the measurement point is designated, the prompt line on the screen will display "Please specify the position of the dimension line" as shown in Fig. 10. An indication of the position above is required. At this time, in order to facilitate the pointing operation on the screen of the display 3, in addition to the cross-shaped point cursor as shown in FIG. 10, the position and shape of the dimension line and the dimension auxiliary line corresponding thereto are schematically shown. A line cursor is displayed.

When the dimension line position is designated by operating the mouse or the like, next, as shown in FIG. 11, the basic dimension line is written on the drawing, and "the next point to be measured is designated on the prompt line. The message "Please." Is required to prompt the operator for additional measurement points. Also at this time, line cursors corresponding to the position shapes of the dimension line and the dimension auxiliary line as shown in FIG. 11 are displayed on the screen. When an additional measurement point is designated by operating the mouse or the like, next, as shown in FIG. 12, an additional dimension line is written on the drawing and the length of the dimension line newly written, that is, the auxiliary line interval is Since it is 10 mm or less, for example, 9 mm, the terminal symbol of the dimension line for the new intermediate dimension extension line is changed to a predetermined intermediate symbol, for example, a slash ("/"), and the prompt line "Measure next point" The operator is required to instruct additional measurement points.

When the mouse or the like is further operated to designate an additional measurement point, an additional dimension line is written on the drawing as shown in FIG. 13 and a new dimension line is added as described above. Since the dimension line length (extension line interval) immediately before the intermediate dimension extension line is 10 mm or less, the intermediate symbol is further changed to a slash (“/”) and the prompt line “Measurement next point” The operator is required to instruct additional measurement points. When the dimension line lengths (auxiliary line intervals) on both sides of the new intermediate dimension extension line generated by the addition of the measurement points both exceed 10 mm, the intermediate symbol is not changed. To end the series entry of dimension lines, in this state, select "automatic recognition"-"stop".

Next, the automatic change processing of the intermediate symbols and the undo processing thereof when writing the additional dimension line in the case of serial writing in FIGS. 12 and 13 will be described in detail. In the state in which the basic dimensions based on the basic points are written (corresponding to FIG. 11), as shown in FIG. 14, the dimension line and the dimension auxiliary line extending perpendicularly from both ends of the dimension line to the measurement point and the dimension line. The dimensional value and the drawing data are written as drawing data in the upper center. As shown in FIG. 17, this data is written in the memory 17, but at the time of this writing, in the uppermost area L0 of the undo buffer 18,
As shown in the figure, empty data corresponding to the fact that there is no data immediately before this dimension line is stacked.

Next, an additional dimension line corresponding to the first additional point or the third measuring point is written (corresponding to FIG. 12). At this time, the dimension value of the added dimension line is 9 mm,
In other words, since it is 10 mm or less, as shown in an exaggerated part in FIG. 15, the above-mentioned intermediate dimension auxiliary line on the second measurement point common to the initial dimension line and the dimension line to be added is used. The terminal symbol of the original dimension line is changed to a predetermined intermediate symbol (“/”), and the corresponding terminal symbol of the added dimension line is formed as invalid data (shown by a broken line).

In writing this additional dimension line, FIG.
The dimension line data which has been written in the memory 17 up to then is once taken in, empty data is added to the additional point side, and it is pushed to the undo buffer 20 as shown in FIG. The initial dimension line in which the terminal symbol corresponding to the intermediate dimension extension line on the second measurement point is changed to a predetermined intermediate symbol, and the additional dimension in which the terminal symbol corresponding to the intermediate symbol is invalid data The line and the line are written in the memory 17, and the drawing data is changed. Therefore, in the uppermost area L0 of the undo buffer 18, data in which empty data is added to the additional point side of the dimension line data that has been written in the memory 17 up to that point is stored. Second area L
1 stores empty data that has been stored in the highest area L0 up to that point.

Furthermore, an additional dimension line corresponding to the next additional point, the fourth measuring point, is written (corresponding to FIG. 13). At this time, since the dimension value of the dimension line immediately before the dimension line to be added is 9 mm, that is, 10 mm or less, as shown in an exaggerated part in FIG. , The terminal symbol of the immediately preceding dimension line corresponding to the intermediate dimension extension line on the third measurement point common to the above is changed to a predetermined intermediate symbol, and the corresponding terminal symbol of the added dimension line is ineffective. It is formed as data (broken line).

In writing this additional dimension line, FIG.
The dimension line data, which has been written in the memory 17 up to then, is once taken in, empty data is added to the additional point side, and it is pushed to the undo buffer 18 as shown in FIG. The dimension line immediately before the terminal symbol corresponding to the intermediate dimension extension line on the measurement point 3 is changed to a predetermined intermediate symbol, and the terminal symbol corresponding to the intermediate symbol is added as invalid data. The line and the line are written in the memory 17, and the drawing data is changed. Therefore, in the uppermost area L0 of the undo buffer 18, data in which empty data is added to the additional point side of the dimension line data that has been written in the memory 17 up to that point is stored. Second and third
The data stored in the second and highest areas L0 and L1 up to that point are stored in the second areas L1 and L2, respectively.

When an undo operation is performed in the state of FIGS. 16 and 19, the contents of the highest area L0 of the undo buffer 18 in FIG. 19 is popped (area L1.
And the contents of L2 move to areas L0 and L1, respectively), and are written in the memory 17. Therefore, the drawing data of the memory 17 and the contents of the stack of the undo buffer 18 return to the states of FIGS.

Similarly, when the undo operation is performed in the states of FIGS. 15 and 18, the contents of the highest area L0 of the undo buffer 20 in FIG. 18 are popped (the contents of the area L1 move to the area L0). , Written in the memory 17. Therefore, the drawing data of the memory 17 and the contents of the stack of the undo buffer 20 are shown in FIGS.
Return to the state of. Furthermore, in the state of FIG. 14 and FIG.
When the undo operation is performed, the contents of the highest area L0 of the undo buffer 20 in FIG. 17 is popped and written in the memory 17. Therefore, the drawing data of the memory 17 and the contents of the stack of the undo buffer 20 return to the blank state before the dimension line writing.

In this way, by repeating the instruction of the additional measurement points, the dimension lines in a serial form for a large number of continuous measurement values are successively created, and at the same time, the dimension line length is short (the dimension assist line interval is narrow. In this case, the terminal symbol in the middle portion is sequentially changed to a predetermined intermediate symbol, and the dimension line data in the previous state is sequentially stacked in the undo buffer 18 together with the empty data. Therefore, the contents of the undo buffer 18 can be sequentially written back by an undo operation to always return to the state immediately before, and the capacity of the undo buffer 18, that is, the multi undo (multiple undo ) Is also possible.

Of course, when the dimension line lengths on both sides of the intermediate dimension extension line are both sufficiently long (the dimension extension line interval is sufficiently wide), the intermediate symbol is not automatically changed and the standard terminal symbol is used. . Further, the type of the dimension line which can implement the present invention is not limited to the vertical dimension line, but may be, for example, the diagonal dimension line, and other angle dimensions and the like as long as serial entry using simplified intermediate symbols is possible. It may be the dimension line.

[0048]

As described above, according to the present invention, when a dimension is entered on the drawing data, the series entry of dimension lines is selected, and the measurement points on the drawing necessary for the entry of the first dimension line. Instruct the basic point, including the, and specify the position of the dimension line on the drawing to be dimensioned, write the dimension data based on the instruction on the displayed and stored drawing data, and write it to the undo buffer. Stacks empty data, sequentially indicates the other measurement points on the drawing that are necessary for drawing the dimension line, and in serial form on the dimension data already written based on the instruction on the displayed and stored drawing data. A terminal symbol corresponding to at least a predetermined part of a new intermediate dimension auxiliary line of the dimension line added and serially written is rewritten to a predetermined intermediate symbol to write the dimension data of the other measurement point. In both cases, the data of the size before addition and empty data are stacked in the undo buffer, and the contents stacked in the undo buffer are sequentially displayed and stored on the drawing data for each predetermined undo operation. It is possible to put the dimension line in a serial format while automatically changing the intermediate symbol easily and properly by returning it to a simple operation, and also to perform an appropriate undo. It is possible to provide a method and apparatus for creating a dimension line that can remarkably reduce the load.

[Brief description of drawings]

FIG. 1 is a block diagram showing a schematic configuration of a CAD system incorporating a dimension line creating apparatus according to an embodiment of the present invention.

FIG. 2 is a flowchart for explaining a schematic operation of the CAD system of FIG.

FIG. 3 is a flow chart showing in detail a process related to dimension writing for explaining a schematic operation of the CAD system of FIG.

FIG. 4 is a flowchart showing details of undo processing for explaining a schematic operation of the CAD system in FIG.

5 is a diagram schematically showing a state of a display screen for explaining a schematic operation of the CAD system of FIG.

FIG. 6 is a diagram schematically showing a state of a display screen for explaining a schematic operation of the CAD system of FIG.

7 is a diagram schematically showing a state of a display screen for explaining a schematic operation of the CAD system in FIG.

8 is a diagram schematically showing a state of a display screen for explaining a schematic operation of the CAD system in FIG.

9 is a diagram schematically showing a state of a display screen for explaining a schematic operation of the CAD system in FIG.

10 is a diagram schematically showing a state of a display screen for explaining a schematic operation of the CAD system in FIG.

11 is a diagram schematically showing a state of a display screen for explaining a schematic operation of the CAD system in FIG.

12 is a diagram schematically showing a state of a display screen for explaining a schematic operation of the CAD system in FIG.

13 is a diagram schematically showing a state of a display screen for explaining a schematic operation of the CAD system in FIG.

14 is a diagram schematically showing a drawing situation for explaining a schematic operation of the CAD system of FIG.

15 is a diagram schematically showing a drawing situation for explaining a schematic operation of the CAD system in FIG.

16 is a diagram schematically showing a drawing situation for explaining a schematic operation of the CAD system in FIG.

17 is a diagram schematically showing a memory operation for explaining a schematic operation of the CAD system in FIG. 1. FIG.

FIG. 18 is a diagram schematically showing a memory operation for explaining a schematic operation of the CAD system of FIG. 1.

FIG. 19 is a diagram schematically showing a memory operation for explaining a schematic operation of the CAD system in FIG. 1.

[Explanation of symbols]

1 ... CAD processing unit, 2 ... Input device, 3 ... Display,
4 ... Output device, 5 ... Storage device, 11 ... Display control unit, 12
... command input section, 13 ... measurement point designating section, 14 ... dimension position designating section, 15 ... dimension creating section, 16 ... intermediate symbol processing section,
17 ... Memory, 18 ... Undo buffer, 19 ... Write / rewrite control section, 20 ... Undo control section.

Claims (2)

[Claims] 1. When a dimension is entered on drawing data, a selection step for selecting serial entry of dimension lines and a basic point for instructing a basic point including a measurement point on the drawing necessary for the first dimension line entry. Instructing step, dimensional position instructing step for instructing the position of the dimension line on the drawing where dimensions should be entered, and based on the instruction by the measuring point instructing step and the dimensional position instructing step on the displayed and stored drawing data. The basic writing step for stacking empty data in the undo buffer and the additional point instruction step for successively instructing other measurement points on the drawing necessary for drawing the dimension line are displayed and stored. On the drawing data, the dimension line written in the basic writing step based on the instruction by the additional measuring point instruction step Dimension data for the other measurement points by rewriting the terminal symbol corresponding to at least a predetermined part of the new dimension extension line of the dimension line added in series and entered in series to the predetermined intermediate symbol In addition to writing, the additional write step of stacking the size data and empty data before adding to the undo buffer, and the contents stacked in the undo buffer are displayed and stored sequentially for each predetermined undo operation. And an undo processing step of returning the drawing line data to the drawing data. 2. A dimension line creating apparatus for drawing dimensions on drawing data, and a storage means including a data storage unit for storing the drawing data and an undo buffer for storing history data for undo processing. Command input means for entering commands, including dimension line serialization commands, and basic points including the measurement points on the drawing required to draw the first dimension line and drawings required to enter additional dimension lines Point indicating means for sequentially indicating additional measurement points, and dimensional position indicating means for indicating the position of the dimension line on the drawing to which dimensions are to be written, and stored in the storage section of the storage means. Based on the instruction by the point designating means and the dimension position designating means on the drawing data, the number of new dimension auxiliary lines in the serial form and in series is reduced. Also, the terminal symbol corresponding to a predetermined part is rewritten to a predetermined intermediate symbol, and the dimension data is sequentially written, and at the same time, the dimension data and the empty data in the state before the data writing to the data storage unit are written to the undo buffer. Write / rewrite means for stacking, and control for returning the contents stacked in the undo buffer to the drawing data sequentially displayed and stored in the data storage unit by a predetermined operation. A dimension line creating apparatus comprising: an undo control means.