TWI402706B - System and method for deleting graphics - Google Patents

Description

Graphic deletion system and method

The present invention relates to a graphics deletion system and method.

When the mold designer designs the local structure in the mold drawing, he often encounters the deletion function of some special cases. The most common deletion is to delete the frame. The frame selection refers to deleting a portion inside or outside the closed figure by selecting a closed figure.

This seemingly simple delete action designer takes quite a bit of time to complete, to delete the graphic inside the closed graphic as an example. The completion steps are as follows: 1. The designer first needs to find all the graphics that intersect the closed graphic; For each graphic, redraw the graphic outside the closed graphic, and then delete the original graphic to achieve the purpose of deleting the graphic inside the closed graphic.

The method of manually deleting above can still be used when there are few graphics, but there are thousands of parts in the mold design, and manual deletion will take a considerable amount of time.

In view of the above, it is necessary to provide a graphics deletion system and method that automatically deletes graphics inside or outside a closed graphic by selecting a closed graphic.

A graphics deletion system includes a host and a display, the host includes a mold design unit for generating a mold component graphic and a database for storing graphics and graphics attributes, and the host further includes graphics deletion The unit, the graphic deleting unit comprises: a determining module, configured to determine whether the graphic selected by the user from the database of the mold design unit is closed; the intersection point calculating module is configured to select a closed graphic and need to be deleted when the user selects After the graphic, acquiring attributes of all the graphics and graphics intersecting the closed graphic, determining intersections and coordinates of the closed graphics and the intersecting graphics; and a graphics splitting module for splitting the intersecting graphics Dividing into basic graphics, and grouping the split basic graphics into the database according to the original graphics; the graphics deletion module is configured to interrupt the grouped basic graphics according to the obtained intersection points, and save Each group breaks the basic graphics to the database, obtains the basic graphics that the user needs to delete, and deletes them; the graphics serial module is used to Each said packet concatenated group remaining graphics, each graphic original copy attributes to the concatenated pattern.

A graphics deletion method includes the following steps: selecting a graphic from a database of a computer; determining whether the selected graphic is closed; if the selected graphic is closed, further selecting a graphic to be deleted, and then obtaining Correlating the attributes of all the graphics and graphics intersecting the closed graphic, determining the intersection point of the closed graphic and the intersecting graphic and its coordinates; splitting the intersecting graphic into basic graphics, and splitting the basic The graphics are saved into the database according to the original graphics group; the basic graphics after the grouping are interrupted according to the obtained intersection points, and the basic graphics after the interruption of each group are saved to the database; The basic graphics that need to be deleted are deleted; the remaining graphics of each group in the group are concatenated, and the original attributes of the respective graphics are copied to the concatenated graphics.

Compared with the prior art, the graphic deletion system and method automatically deletes the graphics inside or outside the closed graphic by selecting a closed graphic, thereby avoiding the cumbersome steps of manual deletion and improving the working efficiency of the mold design.

1‧‧‧ display

2‧‧‧Host

3‧‧‧ keyboard

4‧‧‧ Mouse

5‧‧‧Database

20‧‧‧Mold design unit

21‧‧‧Graphic deletion unit

210‧‧‧Judgement module

211‧‧‧ intersection point calculation module

212‧‧‧Graph Split Module

213‧‧‧Graphics Removal Module

214‧‧‧Graphic serial module

1 is a system architecture diagram of a preferred embodiment of the graphics deletion system of the present invention.

2 is a flow chart of a preferred embodiment of the graphics deletion method of the present invention.

3 to 6 are schematic views of the pattern deletion process of the present invention.

Referring to Figure 1, there is shown a system architecture diagram of a preferred embodiment of the graphics deletion system of the present invention. The system mainly includes a display 1, a host 2, a keyboard 3 and a mouse 4. The host 2 includes a mold design unit 20 and a graphic deletion unit 21. The mold design unit 20 is a mold automatic design software (such as AutoCAD) for generating mold component graphics. When the user draws with the mold design unit 20, the mold design unit 20 creates a database 5 for storing attribute information of the graphic and the graphic, and the attributes of the graphic include: line type, line width, and layer. , color, and coordinates of each vertex of the graph. The graphic deletion unit 21 is configured to delete the graphic inside or outside the closed graphic according to the closed graphic selected by the user.

The host 2 is connected to the display 1 for displaying the mold element pattern generated by the mold design unit 20 and the graphic deletion result generated by the graphic deletion unit 21. Said The keyboard 3 and the mouse 4 are used as input devices to input data and select closed graphics when generating mold component graphics and graphics deletion.

The graphics deletion unit 21 includes a determination module 210, an intersection calculation module 211, a graphics split module 212, a graphics deletion module 213, and a graphics serial module 214. The module referred to in the present invention is a computer program segment for performing a specific function, and is more suitable for describing the execution process of the software in the computer than the program. Therefore, the following description of the software is described in the module.

The judging module 210 is configured to determine whether the graphic selected by the user from the database 5 of the mold design unit 20 is closed. If the graphic selected by the user is not a closed graphic, an error message is displayed prompting the user to reselect. If the graphic selected by the user is a closed graphic, the user is prompted to delete the graphic in the closed graphic or delete the graphic outside the closed graphic.

The intersection point calculation module 211 is configured to acquire attributes of all the graphics and graphics intersecting the closed graphics after the user selects to delete the graphics in or outside the closed graphics, and find the intersection of the closed graphics and the intersecting graphics. And its coordinates.

The graphics splitting module 212 is configured to split the intersecting graphics into basic graphics, and save the split basic graphics into the database 5 according to the original graphics. The basic graphics include: line segments, circles, and arcs.

The graphic deletion module 213 is configured to break the grouped basic graphics according to the obtained intersection points, and save the basic graphics after the group breaks to the database 5, and acquire all the inside or outside of the closed graphics. Basic graphics, by user Need to remove it. The interruption means that the figure is disconnected from the intersection point. If there is an intersection point on a line segment, the line segment will change from the intersection point to the two end points to two line segments. If the basic graph to be interrupted is a circle, it needs to be processed separately. Use multiple arcs to draw the circle that needs to be broken, and then delete the original circle.

The graphics concatenation module 214 is configured to concatenate the remaining graphics in each group in the group, and copy the original attributes of the graphics to the concatenated graphics.

Referring to Figure 2, there is shown a flow chart of a preferred embodiment of the graphics deletion method of the present invention. First, in step S401, the user selects a graphic from the database 5 of the mold design unit 20.

In step S402, the determining module 210 determines whether the graphic selected by the user is closed. If the graphic selected by the user is not a closed graphic, an error message is displayed prompting the user to reselect. If the graphic selected by the user is a closed graphic, the user is prompted to delete the graphic in the closed graphic or delete the graphic outside the closed graphic.

In step S403, the user selects to delete the graphic in the closed graphic.

In step S404, the intersection calculation module 211 acquires the attributes of all the graphics and graphics intersecting the closed graphic.

In step S405, the intersection calculation module 211 finds the intersection point of the closed figure and the intersected figure and its coordinates.

Step S406, the graphics splitting module 212 splits the intersecting graphics into basic graphics, and saves the split basic graphics into the database according to the original graphics. 5 in. The basic graphics include: line segments, circles, and arcs.

In step S407, the graphic deletion module 213 breaks the grouped basic graphics according to the obtained intersection points, and saves the basic graphics after the group breaks to the database 5. The interruption means that the figure is disconnected from the intersection point. If there is an intersection point on a line segment, the line segment will change from the intersection point to the two end points to two line segments. If the basic shape to be interrupted is a circle, use multiple arcs to draw the circle you want to break, and then delete the original circle.

In step S408, the graphic deletion module 213 acquires all the basic graphics in the closed graphic and deletes them according to user requirements.

In step S409, the graphics concatenation module 214 concatenates the remaining graphics in each group in the group, and copies the original attributes of the graphics to the concatenated graphics.

In this embodiment, the user selects to delete the graphic inside the closed graphic. In addition to this implementation, the present invention may have other variations. For example, if the user chooses to delete the graphic outside the closed graphic, the graphic deletion module 213 may acquire the graphic outside the closed graphic and delete it. This simple transformation still falls. It is within the scope of protection of the present invention.

Referring to FIG. 3 to FIG. 6 , which is a schematic diagram of the graphic deletion process of the present invention, the entire graphic deletion step is changed from FIG. 3 to FIG. 6 , and in FIG. 3 , the graphic A (which is a closed graphic), the graphic B and the graphic are included. C, the graphic that needs to be deleted is the graphic inside the graphic A. The graphic A, the graphic B, and the graphic C are generated by the mold design unit 20. The user first selects the graphic A, and then the determining module 210 determines the graphic selected by the user. Whether A is closed. If the graphic A is not a closed graphic, an error message is displayed prompting the user to reselect. If the graphic A is a closed graphic, the user is prompted to delete the graphic in the graphic A or delete the graphic outside the graphic A. The following description will be described by taking the figure in the deleted figure A as an example.

After the user selects to delete the graphic in the graphic A, the intersection calculating module 211 acquires all the graphics (graphic B and graphic C) intersecting the graphic A and the attributes of the graphic, and finds the intersection of the graphic A and the graphic B and the graphic C. And its coordinates. As shown in FIG. 3, the pattern A intersects the pattern B at b1 and b2, and the pattern A intersects the pattern C at c1 and c2.

As shown in FIG. 4, the graphic splitting module 212 splits the graphic C into a line segment c3c4, a line segment c4c6, a line segment c6c5, and a line segment c5c3, and saves the split line segment and the graphic C into the database 5 according to the original graphic group. The line segment c3c4, the line segment c4c6, the line segment c6c5, and the line segment c5c3 belonging to the graphic C are stored in the table b of the database 5, and the graphic C is stored in the table c of the database 5.

As shown in FIG. 5, the graphic deletion module 213 breaks the line segment c3c4 into a line segment c3c1, a line segment c1c2, and a line segment c2c4 by intersecting points c1 and c2, and then according to the center of the graph B, the two intersection points b1 of the graphic B and the graphic A. And b2, draw the superior arc b1b2 and the bad arc b1b2, and delete the original graphic B, and save the broken basic graphics into the database 5 according to the original graphics group. The line segment c3c1, the line segment c1c2, the line segment c2c4, the line segment c4c6, the line segment c6c5, and the line segment c5c3 belonging to the pattern C are stored in the table b of the database 5, and the superior arc b1b2 and the inferior arc b1b2 belonging to the pattern B are stored in the database. In the table c of 5, the line segment c1c2 and the inferior arc b1b2 in the closed figure A are acquired and deleted.

As shown in FIG. 6, the graphics concatenation module 214 concatenates the remaining line segments in the graphics C, copies the original attributes of the graphics C to the concatenated graphics, and copies the original attributes of the graphics B to the superior arc b1b2.

If the user selects to delete the graphic outside the graphic A, the graphic deletion module 213 acquires the line segment c3c1, the line segment c2c4, the line segment c4c6, the line segment c6c5, the line segment c5c3, and the superior arc b1b2 outside the closed pattern A, and deletes it.

The present invention is not limited to the present invention. The present invention is not limited to the present invention. Any person skilled in the art will be able to make changes and refinements without departing from the spirit and scope of the invention, and the scope of the invention is defined by the scope of the appended claims.

1‧‧‧ display

2‧‧‧Host

3‧‧‧ keyboard

4‧‧‧ Mouse

5‧‧‧Database

20‧‧‧Mold design unit

21‧‧‧Graphic deletion unit

210‧‧‧Judgement module

211‧‧‧ intersection point calculation module

212‧‧‧Graph Split Module

213‧‧‧Graphics Removal Module

214‧‧‧Graphic serial module

Claims (6)

A graphics deletion system includes a host and a display, the host includes a mold design unit for generating a mold component graphic and a database for storing graphics and graphics attributes, wherein the host further includes a graphic deletion unit, the graphic deletion unit comprising: a determination module, configured to determine whether the graphic selected by the user from the database of the mold design unit is closed; the intersection point calculation module is used when the user selects a closed graphic and needs After deleting the graphic, acquiring attributes of all the graphics and graphics intersecting the closed graphic, determining intersection points of the closed graphic and the intersecting graphic and coordinates thereof, and selecting the graphic to be deleted includes selecting to delete the closed graphic The graphic or selection inside deletes the graphic outside the closed graphic; the graphic splitting module is configured to split the intersecting graphic into basic graphics, and save the split basic graphics into the database according to the original graphics; And deleting a module, configured to interrupt the grouped basic graphics according to the obtained intersection points, and save each The group breaks the basic graphics to the database, obtains the basic graphics that the user needs to delete, and deletes them, the interruption refers to disconnecting the graphics from the intersection point; the graphics serial module is used to group the packets The remaining graphics of each group are concatenated, and the original attributes of each graphic are copied to the concatenated graphics. The graphics deletion system of claim 1, wherein the basic graphics comprise: a line segment, a circle, and an arc. The graphics deletion system of claim 2, wherein if the basic graphic to be interrupted is a circle, the graphic deletion module is further configured to draw a circle to be interrupted by using multiple arcs. Then delete the original circle. A graphics deletion method, the method comprising the steps of: selecting a graphic from a database of a computer; determining whether the selected graphic is closed; if the selected graphic is closed, further selecting a graphic to be deleted, And then acquiring attributes of all the graphics and graphics intersecting the closed graphic, determining intersections of the closed graphics and the intersecting graphics and coordinates thereof, and selecting the graphics to be deleted includes selecting to delete the graphics in the closed graphics or Selecting to delete the graphic outside the closed graphic; splitting the intersecting graphic into a basic graphic, and grouping the split basic graphic into the database according to the original graphic; and intersecting the grouped basic graphic according to the obtained The point segment is interrupted, and the basic graphics after the interruption of each group are saved to the database, the interruption refers to disconnecting the graphic from the intersection point; acquiring the basic graphic to be deleted, deleting it; concatenating the grouping The remaining graphics of each group are copied to the original graphics of the respective graphics. The graphics deletion method of claim 4, wherein the basic graphics comprise: a line segment, a circle, and an arc. The method for deleting a graphic according to claim 5, wherein the method further comprises: if the basic graphic to be interrupted is a circle, using a plurality of arcs to draw a circle to be broken, and then deleting the original circle .