JP2001202402A - Drawing generating device and method for displaying drawing alteration place - Google Patents

Abstract

PROBLEM TO BE SOLVED: To transmit alteration places of a drawing without any omission by accurately and automatically displaying the alteration places of the drawing when the drawing is altered. SOLUTION: A drawing data editing part 12 of an electronic drawing generating device edits an altered drawing and stores it in a data-after-alteration file 21, and then an alteration place automatic display control part 17 is actuated from a screen. Consequently, an alteration difference extraction part 14 calculates differences between drawing data before and after the alteration and performs the lattice expansion of 1/0 in a difference table, and an alteration area border generation part 15 exclusively ORs adjacent meshes of a lattice longitudinally and laterally in order to obtain border data and perform lattice expansion. An alteration place indication drawing generation part 16 scans a longitudinal and a lateral border table and draws outward border figures in odd-ordered meshes where the border data are present and inward border figures (e.g. arc) in even-numbered meshes from the scanning side and a drawing display processing part 13 superimposes the border figures on a drawing after alteration and displays them on a CRT 6.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an apparatus for creating an electronic drawing such as a CAD, and more particularly to a system for identifying and displaying various changed portions of a drawing such as addition, deletion, movement, and replacement.

[0002]

2. Description of the Related Art Drawings such as a design drawing of an apparatus or a flow chart of a processing procedure are repeatedly updated and repeatedly transmitted to a third party. At that time, in order to transmit the changed portion without omission, a drawing showing the changed portion is issued so that the changed portion can be confirmed, and then a revised version is issued.

In a drawing created electronically by CAD, a change mark is displayed at a changed portion, a color of a changed portion is changed, and a line type is changed (Japanese Patent Laid-Open No. 5-20372,
JP-A-10-312407).

[0004]

In the above description of the change portion by the change mark, it is understood that there is a change point near the change mark, but the range cannot be correctly recognized. In addition, it is difficult to apply the color change and the specification of the changed portion by the line type to a drawing that gives meaning to display colors and line types, such as a circuit diagram of a printed circuit board.
It is also difficult to use monochrome drawings.

[0005] Further, in these methods, a changed portion that has been deleted is specified, or another figure is duplicated in a figure.
It is often difficult to clearly indicate a changed portion in a complicated drawing that is nested three times.

SUMMARY OF THE INVENTION In view of the above-mentioned problems of the prior art, it is an object of the present invention to easily and accurately specify various changed parts such as additions, deletions, replacements, and movements. It is an object of the present invention to provide a method of displaying a drawing change portion and a drawing creating apparatus which can be applied to a monochrome drawing.

[0007]

The drawing creation apparatus of the present invention is provided with a drawing editing function and a drawing display function, and is provided with a changed part automatic display control function for identifying and displaying the changed part in the created drawing after the change. The apparatus is characterized in that it is configured to be activated by an operation of adding a boundary graphic, detect a boundary between a changed part and a non-changed part, and superimpose a boundary graphic on the boundary.

[0008] The function for automatically displaying the changed portion may be stored in a storage medium and installed from the medium into the drawing creating apparatus.

The present invention provides a method of displaying a changed portion of a drawing in which a partial change is made to a drawing electronically created and stored, and the changed portion is identifiably displayed. The difference data of the changed portion extracted from the comparison between the drawing data and the drawing data after the change is grid-developed (in the embodiment, written in a grid-like difference data table), and the grid-developed difference data is written in the vertical and horizontal directions. Boundary data representing the boundary between the changed portion and the non-changed portion by exclusive OR with the adjacent cells (mesh) is sequentially grid-expanded (in the embodiment, written in the grid-like boundary data table) for the data sequence of (1). The boundary graphic generated according to the grid-expanded boundary data is superimposed on the changed drawing and displayed.

The grid-developed boundary data is sequentially scanned in the vertical direction and the horizontal direction, and the direction of the boundary graphic is changed depending on whether the cell (mesh) having the boundary data is odd or even from the scanning starting side. I do. For example, using a boundary figure of an arc or a triangular fold line, the convex direction of the arc or the fold line is an odd-numbered direction, and the concave direction is an even-numbered direction. In the boundary shape,
A double line consisting of a thick line and a thin line may be used.

When the changed portion and the non-changed portion are multiplexed, a directional boundary graphic indicating the changed portion from outside and inside is displayed. This display can be realized by a rule for changing the direction of the boundary graphic.

According to another aspect of the present invention, the shape and arrangement of a graphic in a drawing are defined by vector data including a unique identifier (ID), and partial changes are made to the stored drawing. In a method of displaying the changed portion in an identifiable manner, the vector data of the drawing before change and the vector data of the changed drawing are compared, an identifier of the vector data or a symbol whose coordinates are changed is extracted, and all the extracted drawings are extracted. It is characterized in that the coordinates of the elephant are grid-expanded as difference data.

Thus, the present invention can be applied to various drawing changes, such as addition, deletion, movement, replacement, or a combination thereof, to accurately detect a boundary of a changed portion and to identify and display a boundary. To

Unless otherwise specified, the drawings referred to in the present invention refer to those processed, stored, and displayed as electronic data, and the drawing data includes one or both of vector data and raster data. .

[0015]

Embodiments of the present invention will be described below in detail with reference to the drawings. FIG. 1 is a functional block diagram of a drawing creating apparatus according to an embodiment of the present invention. This apparatus comprises a computer 1 having a CPU 10 and a storage device 2, and a computer system including a mouse 3 and a keyboard 4 as input devices, and a CRT 5 and a printer 6 as input / output devices. Further, a configuration may be adopted in which a communication function is provided and drawings are transmitted and received between other computers and input / output devices via a network. Except for printing on paper by the printer 6, all drawings in the present embodiment refer to electronic drawings.

The data input to the CPU 10 from the mouse 3 or the keyboard 4 is processed by an input data analysis unit 11,
Based on the data, the figure is edited by the drawing data editing unit 12, and in the editing process, the temporary file 23 is added. The edited drawing is attached to the drawing number and the changed data (newly created data and updated data) file 21. The drawing of the old version is stored in the pre-change data file 22. The process and results of editing the drawing data are displayed on the CRT 5 by the drawing display processing unit 13 to facilitate input and confirmation by the drawing creator. Further, the image is printed on the paper by the print processing unit 18 and the printer 6. The drawing data editing unit 12 is composed of a plurality of well-known functions whose description is omitted.

In this embodiment, in addition to the basic configuration of the drawing creating apparatus as described above, a change difference extracting section 14, a change area boundary creating section 15, a change section An instruction figure creating unit 16 and a changed part automatic display control unit 17 for controlling these functions are provided. The changed part automatic display control unit 17 is activated by the operation screen 50 of “drawing changed part automatic display processing” on the CRT 5.

The above-mentioned function of displaying a changed portion may be stored as an optional application software in a CDROM or the like and loaded into the computer 1 via a disk driver, so that it can be easily applied to an existing CAD device or the like. .

Next, the operation of this embodiment will be described. The figure number and data of the changed drawing are input and edited, and the changed drawing data is stored in the changed data file 21 and the changed drawing data is stored in the changed data file 22. From the menu screen of the CRT 5, a screen 50 of "drawing changed portion automatic display processing" is displayed, the version numbers of the drawings before and after the change are designated, and "addition of figure" of the changed portion designating figure is selected and executed. . If the change location automatic display processing control unit 17 is selected to "execute" at the start of the change work, the following processing is automatically executed when the editing of the change is completed. If "cancel" is selected, "addition of figure" of the change unit instruction figure is not performed.

FIG. 2 shows a flowchart of the changed part display processing. The changed part automatic display processing 17 first activates the changed difference extracting unit 14, compares the drawing data before (previous) with the drawing data after (current) (s10), and grid-deploys the changed difference data, that is, The data is developed in the grid-like difference data table 140 (s20). Next, based on the grid expansion of the difference data, the changed area boundary creating unit 15 creates boundary information of the changed portion and the unchanged portion, and grid-expands it in the boundary data table 150 (s30). Next, based on the grid expansion of the boundary data, the changed part instruction figure creating unit 16 creates a boundary figure that can identify the changed part along the boundary (s40).

The changed drawing on which the boundary graphic is superimposed is output to the CRT 5 or the printer 6. As will be described later, an arc, a triangle, or the like is used for the boundary graphic, and the boundary graphic has a direction in which a changed portion can be identified at a glance from an unchanged portion. Hereinafter, a first embodiment using raster data and a second embodiment using vector data as drawing data for comparing a drawing before change and a drawing after change will be described in detail.

<Embodiment 1> FIGS. 3A and 3B show drawings before and after a change and specific examples of a boundary graphic showing a changed portion. In the pre-change drawing of (a), the graphic A and the graphic C are connected by one connection line. In the drawing after the change in (b), a graphic B and a connecting line connecting the graphic B and the graphic C are added. On the screen of (c), a boundary graphic having a series of arcs surrounding the changed portion of the drawing after the change is displayed. When the bulge (convex) of the arc faces outward in this manner, it indicates that the inside surrounded by the boundary graphic is a changed portion. Hereinafter, an example in which an arc is displayed as a boundary graphic will be described.

FIG. 4 is an explanatory diagram of grid expansion of difference data. FIG. 4A shows difference data between FIGS. 3A and 3B,
That is, it is an image of the changed portion. FIG. 4B is a schematic diagram in which the difference data is developed in a lattice-like difference data table 140, and FIG. 4C is an explanatory diagram showing the development of the difference data in the modified difference table.

In the first embodiment, a difference between pixels on the screen before and after the change, that is, a difference between raster data, is detected, and pixels having the difference are developed in a grid-like difference data table 140. The difference data table 140 corresponds to the display area of the CRT 5, and is divided into grids (meshes) that are vertically and horizontally partitioned at equal intervals. The length of one side of the square is set to an integral multiple of the unit length of the chord of the arc as the boundary graphic. The unit length of the chord of the arc is displayed on the screen as a group of a plurality of pixels.

The number of pixels required to develop the difference data “1” in one cell of the difference data table 140 is arbitrary, but here, the number of pixels representing the line width is used as a reference. The existence of a figure is checked for each cell according to this criterion, and if there is a figure, “1” is developed if there is no figure, and “0” is developed. However, for a line figure that extends across the boundary of a square, the squares on both sides are “1”, and the squares inside the closed figure are all “1”.

FIG. 5 is a flowchart of a process of detecting a boundary of a changed portion, and FIG. 6 is an explanatory diagram thereof. First, the boundaries in the X-axis direction are determined one row at a time from left to right (s31). That is,
When the grid 141 for one column is cut out along the Y-axis of the difference data table 140 in which the change difference is developed (s311),
Data sequence 1 in which 0 and 1 are arranged in each cell from the top to the bottom of the grid 141
42 is obtained. An exclusive OR operation is performed between the data of the cells adjacent to each other in the data string 142 from top to bottom (s31
2). Due to the exclusive OR of the data string 142, the cell where 0 and 1 are adjacent becomes “1”, the cell where “0” and “0” or “1” and “1” are adjacent becomes “0”. 143 is obtained. The data string obtained by the exclusive OR is grid-expanded in the boundary table 150-1 in the Y-axis direction.

Next, the boundaries in the Y-axis direction are obtained line by line from top to bottom (s32). As in the case of the X-axis direction, the grid 144 for one row in the X-axis direction is obtained from the difference data table 140.
Is extracted (s321), and a data string 146 obtained by performing an exclusive OR operation on the data of adjacent cells from left to right of the data string 145 is converted into a boundary table 1 of a changed portion in the X-axis direction.
Grid expansion is performed to 50-2 (s322).

FIG. 7 shows an example of developing a boundary table in the Y-axis direction and the X-axis direction. (A) is a grid expansion of the same difference data as in FIG. 4, and (b) is a boundary table in the Y-axis direction in which the result of exclusive OR is grid-expanded in order from large to small (top to bottom) of the Y coordinate. 150-1 is shown. As described above, “1” is developed only on the boundary between the cell having the difference data “1” and the cell having no change, that is, the boundary between the cell having the changed portion and the cell not having the changed portion. Become. The grid-developed boundary is a boundary parallel to the Y coordinate.

FIG. 7C shows a small to large X coordinate (from left to right).
The boundary table 150-2 in the X-axis direction in which the result of the exclusive OR is grid-expanded in the order of. Thus, the boundary parallel to the X coordinate is grid-expanded. The thus obtained boundary obtained by scanning in parallel to the Y coordinate and X
When a boundary obtained by scanning in parallel with the coordinates is aligned, an area surrounding the changed portion is obtained.

The change location designating graphic creating unit 16 refers to the boundary tables 150-1 and 150-2 in the Y-axis direction and the X-axis direction, and
Create a boundary figure by connecting arcs. In other words, "circular arcs" are described in each cell indicating a boundary parallel to the Y coordinate and each cell indicating a boundary parallel to the X coordinate. As for the direction of the arc at this time, the square in which “1” appears for the first time in the scanning order creates a (convex) arc bulging toward the scanning start side (upward in the Y-axis direction, leftward in the X-axis direction), and then “ In the square where "1" appears, an arc (concave) concaved toward the scanning start side is created. In other words, according to the repetition rule that odd-numbered “1” is convex and even-numbered “1” is concave in the scanning order, circular arcs are sequentially and repeatedly formed.
Is obtained (here, only one column / one row is shown). Thus, the area surrounded by the concave (concave) side of the arc indicates the area where the changed graphic exists. Of course, the correspondence between the arc-shaped unevenness and the change-side area can be set arbitrarily.

FIG. 8 shows an example of creation of a boundary graphic by an arc. (A) is a boundary table 150-1 in the Y-axis direction,
(B) is an X-axis direction boundary table 150-2, which has the same contents as in FIG. The thick black line in the figure is a partial image of the boundary line. If the thick lines (a) and (b) are combined, the image becomes a closed boundary line. In the present embodiment, this boundary line is not actually described, but is a base line that provides position information when a boundary graphic is drawn, and is a scanning-side side (upper side /
Left side).

FIG. 3C shows a developed image of the boundary graphic described in the boundary graphic table 160. Here, "1"
Using the upper or left side of the square where the appears as a base line, a circular arc with the same length as the side length is drawn. As a result, a boundary graphic can be drawn outside the changed portion so as not to overlap the changed portion. It is also possible to shorten the chord length of the arc and draw the inside of the corresponding cell as the base line position.

In each cell of the actual boundary graphic table 160, boundary graphic data indicating the arc drawing position (start point) and the direction of the concave and convex are described. Will be The drawing data after the change is drawn in the frame memory, and the boundary graphic is drawn thereover, so that the drawing of FIG. 2D is finally output to the CRT 5 or the printer 6.

FIG. 9 shows an example of changing the drawing in the case of deletion. The graphic E in the drawing before the change in (a) is deleted in the drawing after the change in (b). Also in the case of deletion, if the difference data of the drawings before and after the change is obtained, the graphic E is grid-expanded in the difference data table 140, so that a boundary graphic surrounding the graphic E is created in the same manner as described above, and as shown in FIG. Then, a boundary graphic by an arc is superimposed on the changed drawing. According to this, it is possible to recognize that there is a deleted drawing inside the boundary graphic by the arc.

By the way, in the modified drawing of FIG.
The connection line between B is also changed. However, in the difference based on the raster data between the drawing before the change and the drawing after the change, only the figure E remains as the difference data.
It becomes narrower. In order to obtain an accurate boundary of such a changed portion, difference data representing a figure or a connection line actually changed is required. This method will be described in detail in a second embodiment.

According to the above-described method of displaying a boundary graphic according to the present embodiment, the raster data of the drawing before the change and the raster data of the drawing after the change are differentiated, the difference data is grid-expanded, and the vertical direction (for each grid column) and In the horizontal direction (for each row of the grid), an exclusive OR is calculated with the adjacent cells, and the vertical and horizontal boundaries are grid-expanded, and the boundary parallel to the Y coordinate and the boundary parallel to the X coordinate are connected. With the virtual (computational) boundary line as a base line, a boundary graphic surrounding the changed portion is drawn and superimposed on the changed drawing, so that the changed portion of the drawing due to addition, deletion, or the like can be accurately specified.

Next, a method of displaying a boundary using a boundary graphic different from an arc will be described. FIG. 10 is an example of a boundary graphic represented by a concatenation of triangles. In this example, the drawing before and after the change is the same as that in FIG. 3, and the boundary line surrounding the changed portion (dotted line) is displayed as a boundary graphic consisting of continuous triangles.

This triangle is a boundary table in which the upper side or the left side of the cell where "1" appears is used as a base line, and the same length as the side length is drawn as the base of the triangle. Similarly to the convex direction of the arc, the height direction of the triangle is drawn according to the repetition rule of upward / leftward for odd numbers and downward / rightward for even numbers from the scanning side. Therefore, a triangle can be displayed continuously with a triangle at the boundary of the changed portion and the direction of the changed / non-changed side in the height direction of the triangle, so that the changed portion can be recognized without fail.

As a modification of the above-described boundary graphic by the triangle, a boundary graphic by a broken line drawn by drawing two sides of the triangle without drawing the base of the triangle may be used. in this case,
The direction of the crest of the bent line can be given the directionality on the change side / non-change side, and the processing is simple and easy to see because the bottom side is not displayed.

FIG. 11 shows an example in which a boundary graphic is displayed as a double line. In the same example of the changed drawing as in FIG. 3, a changed figure (dotted line)
Is displayed as a border figure formed by a thick line and a thin double line. In the boundary table, a boundary line whose base line is the upper side or the left side of the cell where “1” appears is the image of FIG. Using this boundary line as a base line, a double line is drawn with a thin line inside containing the changed figure and a thick line outside outside not containing the changed figure as shown in (d).

In this example, the direction of the change side / non-change side is indicated by whether the outside of the double line is a thick line or a thin line. In other words, in the repetition rule that the cells in which “1” appears in the boundary table in the scanning order are odd-numbered thick lines and even-numbered thin lines,
Draw a double line on the square. Even with the boundary graphic of the double line, it is possible to have a directionality for distinguishing the changed graphic from the unchanged graphic.

<Embodiment 2> Next, Embodiment 2 of the present invention will be described. In the second embodiment, the drawing before the change and the drawing after the change are compared using vector data, a changed graphic or a connecting line is extracted, and vector data (coordinates) of the changed graphic is extracted.
Is the difference data. Note that the grid expansion in the second embodiment is as follows.
The description will be made by using an image to be written in the grid table as in the first embodiment. However, it is often held as data in a matrix format.

FIG. 12 is an application example for explaining the second embodiment, and is an example of a drawing in which a non-change portion is included inside a change portion. In the drawing before the change in (a), parts A and B
Parts C and D are connected by one line L3
Are tied together. In the drawing after the change of (b), parts A,
Between B, a component E connected by line L1 and line L4 and a component F connected by line L2 and line L5 are added. Also, non-changed parts C and D are included inside these changed parts.

FIG. 13 is an explanatory diagram showing the vector data of the drawing before change and the drawing after change of FIG. 12 and their comparison objects. A unique creation ID is assigned to each image (part, line, etc.), the part is a part ID (A, B, etc.) and coordinates (X, Y), and the line is a line ID (L1, L2, etc.) and a connection destination 1
The vector data including the (part ID) and its coordinates (XS, YS) and the connection destination 2 (part ID) and its coordinates (XE, YE) are stored in the after-change data file 21 and the before-change data file 22 of the storage device 2. Is stored.

After the drawing data is edited by the drawing data editing unit 12, the change difference extracting unit 14 compares the drawing data before and after the change. First, the comparison is made for each ID, and the symbol of the ID that is in the drawing after the change but not in the drawing before the change is “added”, and conversely,
Symbols with IDs that are in the drawing before the change but not in the drawing after the change are determined to be “deleted”, and the coordinates of the symbols with these IDs become difference data. Next, the coordinates are compared for each of the images having the same ID, and if the coordinates are different, it is determined that the image is “moving”, and the coordinates of the changed image become difference data.

In the example of FIG. 13, the parts E and F and the lines L4 and L5 to which new IDs are assigned are "additions", and the lines L1 and L2 are "movements". Become. The image of the difference data (coordinates) is virtually (computedly) developed on the XY coordinates which are divided into a lattice parallel to the Y-axis and the X-axis, and the image is represented in a grid cell (mesh). If it exists, it is grid-expanded to “1”, and if it does not exist, it is written to the grid-like difference data table 140 as “0”. Note that the grid-expanded data may be stored in a format other than a table.

FIG. 14 and FIG. 15 subsequent thereto are explanatory diagrams showing the grid expansion of the difference data and the boundary data of the drawing before and after the change in FIG. FIG. 14 shows (a) the development of the difference data table 140 and (b) the development of the boundary table 150-1 indicating the scanning results on the Y axis. FIG.
(C) Development of the boundary table 150-2 showing the scanning result of the X axis, and (d) an image of the boundary line obtained by combining the Y axis and the X axis.

In the present embodiment, the procedure for detecting the boundary and creating the boundary graphic after the changed part of the drawing is developed in the difference data table 140 is the same as that described in the first embodiment. That is, in the Y direction of the difference data table 140 in FIG. 14A, and then in the X direction, an exclusive OR is performed between the data of the adjacent cells, and the scanning result is defined as the boundary in the Y direction. Table 150-1, X-axis direction boundary table 1
The grid is expanded to 50-2. Furthermore, an arc is created by repeatedly applying the rule that odd numbers are convex and even numbers are concave in the scanning order of both boundary tables.

By the way, when drawing an arc with the boundary line in FIG. 15D as a base line, the first boundary line (outside) is an upwardly convex circular arc from top to bottom, and the next boundary line (inside) is downward. The convex arc on the side, the next boundary line (inside) is an arc convex upward, and the next boundary line (outside) is an arc convex downward. Also, when drawing an arc from the left to the right, the order of convex on the left side, convex on the right side, convex on the left side, and convex on the right side is obtained.
As shown in (d), a boundary graphic representing the outside of the change portion and a boundary graphic representing the inside can be displayed.

According to this, no matter how many overlapped portions are changed and unchanged portions, an arc continuous to the boundary between the changed portion and the unchanged portion can be created, and the arc can be changed depending on the direction of the arc. Expressions that can identify the location without fail are possible. Comparing the example shown in FIG. 12 (c) with the example shown in FIG. 12 (c), it is clear that it is possible at a glance to identify a changed portion in a complicated drawing. It should be noted that the boundary graphic inside (d) can be said to be a boundary graphic surrounding the non-changed portion from the outside, from a different viewpoint.

By the way, when the second embodiment is applied to the example of FIG. 3, the figures A and C and their connection lines have no change in ID or coordinates. Since the figure B and the connecting line between the figures B and C are IDs that appear only in the changed drawing, they are determined to be “added”. Since the coordinates of these "addition" symbols are the difference data, the boundary graphics are the same as those in FIG.

Further, when applied to the example of FIG. 9, the IDs of the figures A and B in the drawing after the change and their connection lines do not change. However, the connection line is determined to be “moving” because one of its coordinates has changed. In addition, since the connecting line between the graphic E and the graphic E, B in the drawing before the change is not included in the ID after the change, it is determined to be “delete”. Since the symbols of “move” and “delete” become difference data of the changed portion, the boundary graphic is shown in FIG.
It becomes the same as (c).

As described above, according to the second embodiment, as the difference processing of the drawing data before and after the change, the ID and the coordinates of the vector data are compared, and the coordinates of the graphic that changes before and after are used as the difference data. Since the grid is developed, boundaries can be correctly detected even in the case of addition, deletion, movement, replacement, etc., or a composite drawing change thereof. The replacement is replacement of a part (figure), and the ID changes.

Further, according to the development rule of the boundary graphic according to the present embodiment, even in a drawing in which a changed part and a non-changed part are intricately complicated, the outer and inner boundary figures, Is changed, the boundary graphic of the changed part and the boundary graphic of the non-changed part are displayed, so that the changed part can be accurately displayed and identified. It is needless to say that the same effect can be obtained even if a triangle or a polygonal line is used as the boundary graphic of the second embodiment described above.

[0055]

According to the present invention, the difference data of the drawing before and after the change is grid-expanded, and the boundary obtained from the exclusive OR of adjacent cells (mesh) sequentially in the vertical and horizontal directions of the grid. Since the data is grid-expanded, a boundary graphic is created according to the grid expansion of the boundary, and is superimposed on the drawing after the change, accurate identification and display of the changed portion becomes possible.

Since the boundary graphic having directionality is drawn on the boundary so as to be in a fixed direction with respect to the changed portion,
False recognition of the changed part can be prevented.

Further, since the drawing before change and the drawing after change are compared with vector data, and the graphic whose ID and coordinates are changed are developed as difference data in a grid, accurate boundary display corresponding to various drawing changes can be performed. Will be possible.

According to the present invention, since the electronic drawing creation apparatus is provided with an operation screen for selecting whether or not to display a boundary graphic capable of identifying a changed portion in a changed drawing, it is possible to select whether or not to display the changed figure.
Confirmation work at the time of drawing change is easy, and for the required third party,
The change range can be transmitted without omission.

Further, since the processing function according to the method of the present invention is stored in a storage medium by being converted into software, the existing C
It can be easily applied to AD devices and the like.

[Brief description of the drawings]

FIG. 1 is a configuration diagram of a drawing creation apparatus according to an embodiment of the present invention.

FIG. 2 is a flowchart showing an outline of a drawing change point display method according to an embodiment of the present invention.

FIG. 3 is an explanatory diagram showing an example of a drawing before a change, a drawing after an additional change, and a display of a changed portion.

FIG. 4 is an explanatory diagram showing a grid development (difference data table) of a drawing change location.

FIG. 5 is a flowchart showing a method of detecting a boundary between a changed portion and a non-changed portion.

FIG. 6: Grid expansion of boundary data (boundary data table)
FIG.

FIG. 7 is an explanatory diagram showing expanded contents of a difference data table and a boundary data table.

FIG. 8 is an explanatory diagram showing the expanded contents of a boundary graphic based on a boundary data table.

FIG. 9 is an explanatory diagram showing an example of a drawing before change, a drawing after change after deletion, and a display of a changed portion.

FIG. 10 is an explanatory diagram showing an example of a changed portion display using another boundary graphic (a triangle / a broken line).

FIG. 11 is an explanatory diagram showing an example of a changed portion display using another boundary graphic (double line).

FIG. 12 is an explanatory diagram showing an example of a drawing before and after a change to which the second embodiment of the present invention is applied and an example of a display of a changed portion.

FIG. 13 is an explanatory diagram showing vector data of a drawing before change and a drawing after change in FIG. 12;

FIG. 14 is an explanatory diagram showing grid development of difference data and Y-axis direction boundary data in the modified drawing of FIG. 12;

FIG. 15 is an explanatory view showing an image of grid expansion of the X-axis direction boundary data, a boundary line (virtual), and the boundary line, following FIG. 13;

[Explanation of symbols]

DESCRIPTION OF SYMBOLS 1 ... Computer, 2 ... Storage device, 3 ... Mouse, 4 ... Keyboard, 5 ... CRT, 6 ... Printer, 10 ... CPU, 11 ...
Input data analysis unit, 12: Drawing data editing unit, 13: Drawing display processing unit, 14: Change difference extraction unit, 15: Change area boundary creation unit, 16: Change location instruction figure creation unit, 17: Change location automatic display control , 18: print processing unit, 21: data file after change, 22: data file before change, 23
... Temporary file, 50 ... Drawing change location automatic display operation screen, 140 ... Difference data table, 150 ... Boundary data table.

Claims (8)

[Claims] 1. A method of making a partial change to a drawing electronically created and stored and displaying the changed portion in an identifiable manner, wherein the drawing data before the change and the drawing data after the change are The difference data of the changed portion extracted from the comparison is grid-expanded, and the vertical and horizontal data strings of the grid-developed difference data are sequentially converted to the changed portion by exclusive OR with the adjacent cells (mesh). Boundary data representing a boundary of a non-changed part is grid-expanded, and a boundary figure generated according to the grid-expanded boundary data is displayed in a manner superimposed on the figure after the change, and a display method of a drawing-changed part is displayed. . 2. The cell (mesh) according to claim 1, wherein the grid-developed boundary data is scanned in a vertical direction and a horizontal direction, and the boundary data is present from the scanning start side.
Wherein the direction of the boundary graphic is changed depending on whether the number is odd or even. 3. The method according to claim 2, wherein the boundary graphic uses an arc or a triangular bent line, and the convex direction of the arc or the broken line is the odd-numbered direction and the concave direction is the even-numbered direction. . 4. The directional boundary graphic according to claim 1, wherein when the changed part and the non-changed part are multiplexed, a directional boundary graphic indicating the changed part from outside and inside is displayed. How to display changes in drawings. 5. The shape and arrangement of an image in a drawing are defined by vector data including a unique identifier (ID),
In a method of making a partial change to a stored drawing and displaying the changed portion in an identifiable manner, comparing the vector data of the drawing before the change and the vector data of the drawing after the change, the identifier or coordinate of the vector data is The changing symbol is extracted, the coordinates of all the extracted symbols are grid-expanded as difference data, and the vertical and horizontal data strings of the grid-expanded difference data are sequentially arranged in adjacent squares ( Boundary data representing the boundary between the changed part and the non-changed part by exclusive OR with (mesh) is grid-expanded, and the boundary figure generated according to the grid-expanded boundary data is superimposed and displayed on the post-change drawing. A drawing change display method characterized by the above-mentioned. 6. A drawing creation apparatus comprising: a drawing editing function for creating drawing data based on input data; a drawing display function for displaying a drawing being edited and a completed drawing on a screen; and a storage device for storing the edited drawing data. For the changed drawing created by the drawing editing function,
A change point automatic display control function for identifying and displaying the change point is provided, and the automatic display control function is activated by adding a figure to detect a boundary between the change point and a non-change point, and superimposing a boundary figure on the boundary. A drawing creation apparatus characterized in that it is configured to perform 7. The change-portion automatic display control function according to claim 6, wherein the change-portion automatic display control function extracts a difference data representing the change portion, a boundary creation function for obtaining boundary data based on the difference data, A drawing creation apparatus having a boundary figure creation function of developing the boundary figure based on boundary data. 8. The drawing creating apparatus according to claim 6, wherein the changed part automatic display control function is stored in a storage medium so as to be installable in a computer constituting the drawing creating apparatus.