JP3181956B2 - Graphic data storage method and apparatus - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

The present invention relates to a so-called CAD (computer).
The present invention relates to a graphic data storage method and apparatus for storing graphic data representing a graphic in a system for processing graphic data such as a uter aided design system.

[0002]

2. Description of the Related Art In a conventional CAD system, a plurality of graphic data are generally stored for each graphic data, and when editing the plurality of graphic data, an editing operation is performed individually for each graphic data. Will be done.
For example, in the case of a line segment figure, consider a case where there are two line segments AB and CD on the same straight line SL as shown in FIG. In a conventional system, these line segments AB and CD
Are stored individually for each line segment, and are not particularly associated even though they exist on the same straight line SL.

[0003] That is, the line segments AB and CD exist on the same straight line SL, but in the conventional system, the graphic data of these line segments AB and CD are both end points A and B, respectively.
And only the coordinate data of C and D, and are stored, for example, in storage means or handled in editing as graphic data composed of the coordinate data of these end points A and B and C and D. That is, these line segments AB
And CD data are the end points A and B and C and D respectively.
Is managed by the coordinate data.

[0004]

In the conventional system as described above, for example, graphic data of graphic elements such as two different line segments AB and CD on a common straight line SL as shown in FIG. It is managed simply by the coordinate data of the end points A and B and C and D. For this reason, as shown in the figure, for example, when it is desired to rotate the line segments AB and CD on the straight line SL by the angle θ about the point O to obtain the line segments A′B ′ and C′D ′, Each line segment must be rotated and moved. That is, first, the line segment AB is rotated by the angle θ about the point O by the first operation R1 to be a line segment A′B ′, and then the second operation R2
Thus, the line segment CD is rotated and moved about the point O by the angle θ to obtain a line segment C′D ′. Therefore, two operations are required.

In the above description, the line segments AB and C
Considering that D is on the common straight line SL, the straight line SL is simply rotated and moved around the point O by the angle θ to form a straight line SL ′. It should be possible to have line segments A'B 'and C'D' on SL '. However, as described above, in the conventional system, the data of the line segments AB and CD are managed only by the coordinate data of the end points A and B and C and D, respectively, and are not associated with the straight line SL. However, such an operation could not be easily performed.

The present invention has been made in view of such circumstances, and in storing graphic data representing a graphic, graphic data of a plurality of graphic elements which are part of a common graphic is commonly and easily stored. It is an object of the present invention to provide a method and an apparatus for storing graphic data which can be changed and corrected.

[0007]

According to a first graphic data storage method according to the present invention, when storing graphic data representing a graphic, a graphic data in which a newly formed new graphic element is stored before is stored. A data discriminating step for discriminating whether or not it consists of a different part on the basic graphic common to any of the graphic elements, and in this step, the new graphic element is shared with any of the graphic elements of the graphic data stored previously. If it is determined that the figure consists of different parts on the figure, the new figure element and the figure element of the previously stored figure data corresponding to the new figure element are replaced with the information representing the common basic figure and the common basic figure. And restoring as graphic data based on a combination with the information indicating the effective range.

[0008]

The second graphic data storage method according to the present invention SUMMARY OF THE INVENTION may, upon storing the graphic data representing a graphic element consisting of a portion of the basic figure, some graphic elements to be stored The figure itself must be included , including
A basic figure input step of inputting information indicating a basic figure constituting a primitive, a range designating step of designating a specific portion on the basic figure inputted in this step as an effective range, and the basic form obtained in these steps. A storage step of storing graphic data based on a combination of information indicating a graphic and information indicating an effective range on the basic graphic.

A first graphic data storage device according to the present invention is a graphic data storage device for storing graphic data representing a graphic. A data discriminating means for discriminating whether or not the element consists of a different part on the basic graphic common to any of the elements; If it is determined that the figure consists of different parts on the figure, the new figure element and the figure element of the previously stored figure data corresponding to the new figure element are replaced with the information representing the common basic figure and the common basic figure. And re-storing means for re-storing as graphic data based on a combination with the information indicating the effective range.

[0010] The second graphic data storage apparatus according to the present invention, in the mark data storing unit for storing graphic data representing a graphic element, some graphic elements to be stored
Basic figures constituting the figure element itself alone, including a
The basic figure input means for inputting information indicating the above, a range designating means for designating a specific portion on the basic figure inputted by the basic figure input means as an effective range, and the basic figure obtained by these means are shown. Storage means for storing graphic data based on a combination of the information and information indicating an effective range on the basic graphic.

[0011]

In the method and apparatus for storing graphic data according to the present invention, when storing graphic data representing a graphic,
If the newly formed new graphic element consists of a different part on the basic graphic common to any of the previously stored graphic data graphic elements, the new graphic element and the previously stored corresponding The graphic element of the graphic data is stored again as graphic data based on a combination of the information representing the common basic graphic and the information indicating the effective range on the common basic graphic, In storing graphic data representing a graphic element, a basic graphic including a graphic element to be stored is input, and a specific portion on the basic graphic is designated as an effective range, and information indicating the basic graphic and By storing graphic data based on a combination with the information indicating the effective range on the basic graphic, a graphic of a plurality of graphic elements consisting of a part of a common graphic is stored. It makes it possible also to modify easily change only the over data in common.

[0012]

Embodiments of the present invention will be described below with reference to the drawings. FIG. 1 shows the configuration of a CAD system incorporating a graphic data storage device according to a first embodiment of the present invention. In the CAD system according to the present embodiment, each time graphic data is input, it is determined whether the newly input new graphic element is composed of a different part on the common basic graphic from the graphic element of the previously stored graphic data. If the new graphic element consists of a different part on the common graphic from any of the previously stored graphic data graphic elements, the new graphic element and the corresponding previously stored graphic By storing the graphic elements of the data as graphic data based on a combination of the information expressing the common basic graphic and the information indicating the effective range on the common basic graphic, a plurality of graphic elements can be stored in the common basic graphic. It is easy to handle figures collectively with information.

The CAD system shown in FIG. 1 includes a CAD processing section 1, an input device 2, a display 3, an output device 4, and a storage device 5. CAD processing unit 1 includes a CPU
(Central processing unit) and C including graphic data storage processing
Execute AD processing. 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.
The display 3 displays necessary information such as image information processed 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 image data processed by the CAD processing unit 1 as a hard copy. The storage device 5 includes a disk device such as a hard disk device, and operates in association with the CAD processing unit 1 to store data such as image information before, after, and during processing.

In this case, the CAD processing unit 1
In addition to the configuration for performing the D processing, the image processing apparatus includes a data determination unit 11, a re-storage processing unit 12, and a memory 13 for performing the graphic data storage processing according to the embodiment of the present invention. The data discriminating unit 11 is constituted by a different part on a basic graphic in which a new graphic element newly input via the input device 2 is shared with one of graphic elements of graphic data previously input and stored in the memory 13. It is determined whether or not there is. The re-storage processing unit 12 stores the new graphic element in the memory 13
If the data discriminating unit 11 determines that the data includes a different part on the common graphic with any of the graphic elements of the graphic data stored previously, the new graphic element and the previously stored graphic corresponding thereto are stored. The graphic element of the graphic data is stored in the memory 13 again as graphic data based on a combination of the information representing the common basic graphic and the information indicating the effective range on the common basic graphic. The memory 13 includes a data determination unit 11 and a re-storage processing unit 12
Is stored. The contents stored in the memory 13 are transferred to the storage device 5 as needed. Also,
The contents stored in the memory 13 may be data transferred from the storage device 5. The memory 13 may share a memory used in normal CAD processing in the CAD processing unit 1.

Next, the operation related to the storage of graphic data in the CAD system having such a configuration will be described in detail with reference to the flowchart shown in FIG. When the execution of the CAD processing is started, first, a new graphic element (this is referred to as a “new graphic element” for convenience of explanation) is input by the operator via the input device 2 (step S1).
Next, the new graphic element input in step S1 is the graphic element of the graphic data previously input and stored in the memory 13 (this is called "storage graphic element" for convenience of explanation).
The data discriminating unit 11 discriminates whether or not it consists of different parts on the same basic graphic (step S2). In step S2, if the data discriminating unit 11 determines that the new graphic element exists on the common basic graphic with any of the stored graphic elements, the re-storage processing unit 12 sets the new graphic element and the corresponding stored graphic The elements are stored back in the memory 13 as graphic data based on a combination of the information representing the common basic graphic and the information indicating the effective range on the common basic graphic (step S3). Step S
If it is determined in step 2 that the new graphic element is not on the common basic graphic with any of the stored graphic elements, it is stored in the memory 13 as normal graphic data in the form of normal graphic data (step S4). . After the processing in step S3 or S4, it is confirmed whether or not a graphic element is to be further input (step S5). If a further graphic element is to be input, the process returns to step 1; Is completed and the process proceeds to the next process. Next, the storage of graphic data in such processing will be specifically described.
In the case of a line segment figure, it is assumed that a line segment A ₀ B ₀ as shown in FIG. 3 has already been input or transferred from the storage device 5 and stored in the memory 13. In this state, step S
When the illustrated line segment C ₀ D ₀ is input in step 1, it is determined in step S 2 whether the line segment C ₀ D ₀ is on the same graphic as any of the already stored graphic data. The line segment CD is
Since it is on the straight line SL0 common to the line segment A ₀ B ₀ , the process proceeds to step S3, where the line segments A ₀ B ₀ and C ₀ D ₀ are information indicating the common line SL0 and the line in the straight line SL0. Minute A ₀
The ranges corresponding to B ₀ and C ₀ D ₀ are stored as a combination with information indicating that the ranges are valid, that is, active, and the graphic data under the line segment A ₀ B ₀ is deleted. Therefore, the line segments A ₀ B ₀ and C ₀ D ₀ are stored in association with each other as information for activating each range on the common straight line SL0. Similarly, in the case of an arc graphic, when an arc E ₀ F ₀ as shown in FIG. 4 is input in step S1, it is determined whether the arc E ₀ F ₀ is on the same graphic as any of the already stored graphic data. Is the step S
2 is determined. In this case, if there is no graphic data already stored, the arc E ₀ F ₀ is stored as normal arc data in step S4. Furthermore, the arc G ₀ H
_{When 0} is input, the process returns from step S5 to step S1, and the arc G ₀ H ₀ is input. Arc G ₀ H ₀ is arc E
Since it is on the common circle CC0 with ₀ F ₀ , the process proceeds to step S3, where the arcs E ₀ F ₀ and G ₀ H _{0 form} the common circle CC _0.
0 and the arcs E ₀ F ₀ and G ₀ H in the circle CC0
_The range corresponding to ₀ is stored as a combination with information indicating that the range is valid, that is, active, and the graphic data under the arc E ₀ F ₀ is deleted. When further inputting the arc I ₀ J ₀ , the process returns from step S5 to step S1, and the arc I ₀ J ₀ is input. Arc I ₀ J ₀
Is on the common circle CC0 with the arcs E ₀ F ₀ and G ₀ H ₀ , the process proceeds to step S3, where the arcs I ₀ J ₀ and E
₀ F ₀ and G ₀ H ₀ are valid, that is, active, that is, information indicating the common circle CC ₀ and ranges respectively corresponding to the arcs I ₀ J ₀ , E ₀ F ₀ and G ₀ H ₀ in the circle CC _0. Is stored as a combination with the information indicating the fact. In this case, the graphic data under the arcs E ₀ F ₀ and G ₀ H ₀ is deleted or changed.

If the graphic data is stored as described above, the graphic data can be corrected as follows. In this case, in the CAD system, a plurality of graphic data items are selected in advance from a plurality of graphic data items on a common graphic and grouped as required, and the attribute parameters of the common graphic information of the graphic data are changed and corrected. Thus, a plurality of grouped graphic data can be collectively corrected.

That is, the CAD processing unit 1 of the CAD system
Executes CAD processing including graphic correction processing. CAD
The processing unit 1 has a grouping function and a group editing function. The grouping function is a function for defining a group constituted by at least a part of a plurality of graphic data existing on a common graphic in graphic data included in image information being handled by the CAD processing unit 1. In this case, C
From the graphic data included in the image information displayed on the display 3 being handled by the AD processing unit 1, desired graphic data among a plurality of graphic data existing on a common graphic is input by the operator via the input device 2. Indicate that a group is selectively defined. The group editing function
By changing the attribute parameter of the common graphic of the group defined as the group, this function is to change and correct the graphic data of the group in common with respect to the attribute parameter.

Next, the operation relating to such a figure correction will be described.
This will be described in detail with reference to the flowchart shown in FIG. When the execution of the graphic correction process is started, it is first determined whether or not to use the “grouping mode” (step S11).
The process shifts to the “normal mode” process (step S12), and the usual normal CAD process without the graphic correction process in the “grouping mode” is performed. Whether to use the “grouping mode” is set in advance by processing mode information input by the operator.

In step S11, "grouping mode"
Is determined to be used, a graphic element grouping setting process is started, and a plurality of graphic elements to be grouped are selected from the graphic data displayed on the display 3 (step S13), and the selected graphic In order to confirm whether an element can be recognized as a group, a group of graphic elements is represented by a display attribute different from other parts (for example, a display color different from other parts or a display luminance different from other parts). It is displayed (step S14). As to whether or not the selected graphic element is to be recognized and set as a group, information is input through the input device 2 by the operator, and then the input content, that is, whether or not the group is recognized is determined (step S15). Step S15
If it is determined that the selected graphic element is recognized as a group, a group recognition setting process is performed (step S16). In this step S16, it is also possible to change the graphic elements constituting the group. Next, it is determined whether the graphic element of the group set in step S16 exists on the common graphic (step S17), and the graphic element of the group set in step S16 exists on the common graphic. If not, an error message is displayed indicating that grouping cannot be performed (step S
18), and return to step S15. If the graphic elements of the group set in step S16 exist on the common graphic, the display 3 indicates that the grouping has been completed. Thus, the graphic element grouping setting processing is completed.

Next, the process proceeds to a graphic element group editing process.
After input by the operator via the input device 2 as to whether or not to perform graphic element editing, the input content is determined (step S20). Step S15 described above
If it is determined that the selected graphic element is not recognized as a group, the process proceeds to step S20. If it is determined in step S20 that graphic element editing is to be performed,
The operator commonly changes and sets a desired part or all of the attribute parameters of the common graphic of the graphic elements of the group via the input device 2 (step S21). Step S21
When some or all of the attribute parameters of the common graphic of the group of graphic elements are changed and set in common, the graphic elements of the same group are commonly changed accordingly (step S22). Then, the graphic element group editing processing ends, and the system proceeds to the next processing. Step S20
If it is determined that the graphic element editing is not performed, the graphic element group editing processing is immediately stopped at that point, and the system proceeds to the next processing.

Next, a specific example of the above operation will be described. For example, if the target graphic is a line segment, as shown in FIG. 6, three line segments A ₁ B ₁ ,
Consider the case where there are C ₁ D ₁ and E ₁ F ₁ . (1) In step S13, the operator selects the line segments A ₁ B ₁ and C ₁ D ₁ as the same group in order to make the line segments A ₁ B ₁ and C ₁ D ₁ into the same group. (2) In steps S15 and S16, the line segment A ₁ B ₁
And if it is confirmed that setting the C ₁ D ₁ as the same group, the system, at step S17, the line segment A ₁
The graphic data of B ₁ and C ₁ D ₁ are respectively confirmed, and if it is recognized that they exist on the common straight line SL1, it is determined that they can be grouped as the same group, and the completion of the grouping is determined. indicate. At this time, if they do not exist on the common figure, step S
At 18, an error message is displayed to the effect that these graphic data cannot be placed in the same group.

(3) When the grouping as the same group is completed, the line segments A ₁ B ₁ and C ₁ D ₁ are recognized and set in the system as the same group existing on the common graphic. Thus, the graphic element grouping setting processing ends. (4) When it is desired to rotate the line segments A ₁ B ₁ and C ₁ D ₁ around the point O by the angle θ, the line segments A ₁ B ₁ and C ₁ the attribute parameter of common straight line SL1 of D ₁ by an operator to correct, it is possible to change modifying the line a ₁ B ₁ and C ₁ D ₁ at a time. For example, if the line segment A ₁ B ₁ is selected as a group correction and the angle θ as the attribute parameter is corrected, the line segments C ₁ D ₁ belonging to the same group are also corrected at the same time.
'Move on segment A _1' linearly SL1 as shown in B
The ₁ 'and C _1' D ₁ '. At this time, the line segment A ₁ B
_The line segments E ₁ F ₁ existing on the same straight line SL1 as the line segments ₁ and C ₁ D ₁ are not grouped and selected as the same group.
₁ F ₁ does not move. In this case, if necessary, the line segment EF
Is changed or re-stored.

Here, an example of the above attribute parameter will be described. For example, a line segment G ₁ H ₁ as shown in FIG.
Exists on a straight line SL2 passing through the two points G ₁ and H ₁ . Such attribute parameters of the straight line SL2 are, for example, parameters such as the coordinates of one point on the straight line SL2 and the angle θ of the straight line SL2 with respect to the angle reference. An arc I ₁ J ₁ as shown in FIG. 8 passes through two points I ₁ and J ₁ ,
It exists on a circle CC1 whose center is O. The attribute parameters of the circle CC1 are, for example, parameters such as the coordinates of the center O and the radius r of the circle CC1. By changing these attribute parameters, it is possible to move (change X and Y coordinates) and rotate (change θ) a line segment figure, and to move (change center coordinates) and change a radius (change r) for an arc figure. Is possible.

Next, the case of changing the arc figure will be specifically described. For example, an arc M on a circle CC2 shown in FIG.
Suppose N and PQ are grouped into the same group. In this case, for the graphic element MN which is an arc graphic,
When the XY coordinate of the center O of the circle CC2 is moved to the point O ', the circle is rotated by an angle θ with respect to the center of the circle, and the radius R of the circle CC2 is changed to the radius R', the circle CC2 shown in FIG. ′
The upper arcs MN 'and PQ' are obtained. As described above, by grouping a plurality of graphic data on a common graphic, graphic elements grouped into the same group can be edited collectively by a single operation for changing attribute parameters in common. . Of course, instead of selectively grouping a part of a plurality of pieces of graphic data on a common figure, a plurality of pieces of graphic data on a common figure may all be grouped as the same group.

FIG. 2 shows the configuration of a CAD system incorporating a graphic data storage device according to a second embodiment of the present invention. In the CAD system of this embodiment, when inputting graphic data representing a graphic element composed of a part on the basic graphic, a basic graphic including the graphic element to be stored is input, and a specific part on the basic graphic is input. Is designated as an effective range, and the graphic data based on a combination of the information indicating the basic figure and the information indicating the effective range on the basic figure is stored. It is easy to handle.

The CAD system shown in FIG. 10 has an input device 2, a display 3, an output device 4, a storage device 5 and a C
An AD processing unit 6 is provided. The CAD processing unit 6 includes a CPU
(Central processing unit) and C including graphic data storage processing
Execute AD processing. The input device 2, the display 3, the output device 4, and the storage device 5 are the same as those in FIG.
In this case, in addition to the configuration for executing the normal CAD processing, the CAD processing section 6 includes a basic graphic input section 6, a range designating section 62, and a storage section for executing the graphic data storage processing according to the embodiment of the present invention. It includes a processing unit 63 and a memory 64. The basic figure input unit 61 inputs, via the input device 2, a basic figure of a graphic element to be newly input. The range designating section 62 designates and inputs one or more desired ranges on the basic graphic input by the basic graphic inputting section 61 via the input device 2. The storage processing unit 63 stores in the memory 64 a form of graphic data based on a combination of the information representing the common basic graphic and the information indicating the effective range on the common basic graphic. The memory 64 stores information related to the processing of the basic graphic input unit 61 and the range designating unit 62.
The contents stored in the memory 64 are transferred to the storage device 5 as needed. The contents stored in the memory 64 may be data transferred from the storage device 5 in some cases. The memory 64 may share a memory used in normal CAD processing in the CAD processing unit 6.

Next, the operation of the CAD system having such a configuration, particularly for storing graphic data, will be described in detail with reference to the flowchart shown in FIG. When the execution of the CAD processing is started, first, a basic figure is input by the operator via the input device 2 (step S3).
1). Next, a designated range on the basic figure is input by the operator via the input device 2 (step S3).
2). It is determined whether there is a range to be further input other than the range input in step S32 (step S3).
3) If there is a range to be further input other than the range input in step S32, the process returns to step S32. If there is no further range to be input, the storage processing unit 63
It is stored in the memory 64 as a form of graphic data based on a combination of the information expressing the common basic graphic and the information indicating the effective range on the common basic graphic (step S3).
4).

Next, the storage of graphic data in such processing will be specifically described. In the case of a line segment figure, in step S31, a straight line SL3 as shown in FIG. 12 is inputted, and in step S32, the range of the line segment A ₂ B ₂ is designated as an active range on the straight line SL3 as shown in FIG. Then, the process returns to step S32 to designate the range of the line segment C ₂ D ₂ on the straight line SL3 as shown in FIG. Line segment A ₂ B ₂ and C
₂ D ₂ is the information indicating the common straight line SL3 and the straight line SL
3 are stored as a combination with information indicating that ranges corresponding to the line segments A ₂ B ₂ and C ₂ D ₂ are active. Therefore, the line segments A ₂ B ₂ and C ₂ D ₂
Are associated and stored as information that activates each range on the common straight line SL3. In this case, it is easy to understand that the inactive portion on the straight line SL3 is displayed in at least one of a color and a line type different from the active range. Therefore, if necessary, the straight line S
At least one of the display color and the display line type of the inactive portion on L3 can be arbitrarily specified.

In the case of an arc figure, a circle CC3 as shown in FIG. 13 is input, and an arc E ₂ F on this circle CC3 is further inputted.
₂ , the part corresponding to G ₂ H ₂ and I ₂ J ₂ is designated as the active range. As a result, the arcs E ₂ F ₂ and G ₂
That The H ₂ and I ₂ J _2, and activates the range corresponding respectively to the information indicating the common circle CC3 and the arc E ₂ F ₂ and G ₂ H ₂ of the circle in the CC3 and I ₂ J ₂ It is stored as a combination with the indicated information. Also in this case, the yen CC
It is easy to understand that the non-active portion on 3 is displayed in at least one of a color and a line type different from the active range. Therefore, if necessary, at least one of the display color and the display line type of the inactive portion on the circle CC3 can be arbitrarily designated. If the graphic data is stored in this manner, the graphic data can be easily corrected in the same manner as described above.

[0030]

As described above, according to the present invention, when storing graphic data representing a graphic, a new graphic element to be newly formed is selected from the graphic elements of the previously stored graphic data. In the case where the new graphic element and the graphic element of the previously stored graphic data corresponding to the new graphic element are different from each other, the new graphic element and the graphic element of the previously stored graphic data are replaced with the information expressing the common basic graphic and the common basic graphic. When storing graphic data based on a combination with information indicating the effective range on a graphic, or storing graphic data representing a graphic element consisting of parts on the basic graphic, the basic data including the graphic element to be stored A figure is input, a specific part on the basic figure is designated as an effective range, and a set of information indicating the basic figure and information indicating an effective range on the basic figure Provided is a graphic data storage method and apparatus which store graphic data based on matching and enable common and easy change and correction of graphic data of a plurality of graphic elements which are part of a common graphic. be able to.

[Brief description of the drawings]

FIG. 1 is a block diagram illustrating a configuration of a CAD system incorporating a graphic data storage device according to a first embodiment of the present invention.

FIG. 2 is a flowchart for explaining the operation of the embodiment of FIG. 1;

FIG. 3 is a schematic explanatory diagram for explaining the operation of the embodiment of FIG. 1;

FIG. 4 is a schematic explanatory diagram for explaining the operation of the embodiment of FIG. 1;

FIG. 5 is a flowchart for explaining a graphic data correction method that can effectively use stored graphic data according to the embodiment of FIG. 1;

FIG. 6 is a schematic explanatory diagram for explaining an operation according to the flowchart of FIG. 5;

FIG. 7 is a schematic explanatory diagram for explaining an operation according to the flowchart of FIG. 5;

FIG. 8 is a schematic explanatory diagram for explaining an operation according to the flowchart of FIG. 5;

FIG. 9 is a schematic explanatory diagram for explaining an operation according to the flowchart of FIG. 5;

FIG. 10 is a block diagram illustrating a configuration of a CAD system incorporating a graphic data storage device according to a second embodiment of the present invention.

FIG. 11 is a flowchart for explaining the operation of the embodiment in FIG. 10;

FIG. 12 is a schematic explanatory diagram for explaining the operation of the embodiment in FIG. 10;

FIG. 13 is a schematic explanatory diagram for explaining the operation of the embodiment in FIG. 10;

FIG. 14 is a diagram for explaining graphic storage and correction processing in a conventional CAD system.

[Explanation of symbols]

1, 10 CAD processing unit, 2 input device, 3 display, 4 output device, 5 storage device, 11 data determination unit, 12 re-storage processing unit, 13, 64 memory, 61
Basic figure input unit, 62: range designating unit, 63: storage processing unit.

Claims (4)

(57) [Claims] When storing graphic data representing a graphic, a newly formed new graphic element is composed of a different part on a basic graphic common to any of graphic elements of previously stored graphic data. A data discriminating step of discriminating whether the new graphic element is composed of a different part on the graphic common to any of the graphic elements of the previously stored graphic data. And correspondingly stored graphic elements of previously stored graphic data as graphic data based on a combination of the information representing the common basic graphic and the information indicating the effective range on the common basic graphic. And a restoring step. Wherein Upon storing graphic data representing a graphic element consisting of a portion of the basic figure, themselves single including graphic elements to be stored as part
A basic figure input step of inputting information indicating a basic figure constituting a German graphic element, a range designating step of designating a specific portion on the basic figure inputted in this step as an effective range, Storing a graphic data based on a combination of the information indicating the basic graphic and information indicating an effective range on the basic graphic. 3. A graphic data storage device for storing graphic data representing a graphic, wherein a newly formed new graphic element is different from any of the previously stored graphic data on a basic basic graphic. A data discriminating means for discriminating whether or not the graphic element is composed of a part; and a case where the data discriminating means determines that the new graphic element is composed of a different part on a common graphic with any of the graphic elements of the graphic data stored previously The new graphic element and the graphic element of the previously stored graphic data corresponding to the new graphic element are based on a combination of the information representing the common basic graphic and the information indicating the effective range on the common basic graphic. A graphic data storage device, comprising: re-storing means for storing data as graphic data again. 4. The graphic data storage unit for storing graphic data representing a graphic element itself single including graphic elements to be stored as part
Basic figure input means for inputting information indicating a basic figure constituting a German graphic element; range designating means for designating a specific portion on the basic figure inputted by the basic figure input means as an effective range; Storage means for storing graphic data based on a combination of information indicating the basic graphic obtained by means and information indicating an effective range on the basic graphic.