CN113420408A - CAD networked import system and import method - Google Patents
CAD networked import system and import method Download PDFInfo
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- CN113420408A CN113420408A CN202110527265.7A CN202110527265A CN113420408A CN 113420408 A CN113420408 A CN 113420408A CN 202110527265 A CN202110527265 A CN 202110527265A CN 113420408 A CN113420408 A CN 113420408A
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- 230000008676 import Effects 0.000 title claims abstract description 50
- 238000000034 method Methods 0.000 title claims abstract description 30
- 238000004891 communication Methods 0.000 claims abstract description 9
- 238000004519 manufacturing process Methods 0.000 claims abstract description 8
- 230000005540 biological transmission Effects 0.000 claims abstract description 6
- 230000006870 function Effects 0.000 claims description 14
- 238000013461 design Methods 0.000 claims description 8
- 230000006855 networking Effects 0.000 claims 1
- 238000011960 computer-aided design Methods 0.000 description 47
- 238000005516 engineering process Methods 0.000 description 7
- 230000004044 response Effects 0.000 description 4
- 238000005538 encapsulation Methods 0.000 description 2
- 230000007246 mechanism Effects 0.000 description 2
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- 230000003190 augmentative effect Effects 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
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- 238000012360 testing method Methods 0.000 description 1
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- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06F—ELECTRIC DIGITAL DATA PROCESSING
- G06F30/00—Computer-aided design [CAD]
- G06F30/20—Design optimisation, verification or simulation
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- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06F—ELECTRIC DIGITAL DATA PROCESSING
- G06F16/00—Information retrieval; Database structures therefor; File system structures therefor
- G06F16/20—Information retrieval; Database structures therefor; File system structures therefor of structured data, e.g. relational data
- G06F16/25—Integrating or interfacing systems involving database management systems
- G06F16/252—Integrating or interfacing systems involving database management systems between a Database Management System and a front-end application
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- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06F—ELECTRIC DIGITAL DATA PROCESSING
- G06F16/00—Information retrieval; Database structures therefor; File system structures therefor
- G06F16/50—Information retrieval; Database structures therefor; File system structures therefor of still image data
- G06F16/51—Indexing; Data structures therefor; Storage structures
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- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06F—ELECTRIC DIGITAL DATA PROCESSING
- G06F9/00—Arrangements for program control, e.g. control units
- G06F9/06—Arrangements for program control, e.g. control units using stored programs, i.e. using an internal store of processing equipment to receive or retain programs
- G06F9/44—Arrangements for executing specific programs
- G06F9/445—Program loading or initiating
- G06F9/44521—Dynamic linking or loading; Link editing at or after load time, e.g. Java class loading
- G06F9/44526—Plug-ins; Add-ons
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- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06F—ELECTRIC DIGITAL DATA PROCESSING
- G06F9/00—Arrangements for program control, e.g. control units
- G06F9/06—Arrangements for program control, e.g. control units using stored programs, i.e. using an internal store of processing equipment to receive or retain programs
- G06F9/46—Multiprogramming arrangements
- G06F9/54—Interprogram communication
- G06F9/547—Remote procedure calls [RPC]; Web services
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Abstract
The invention provides a CAD networked import system import method developed based on ObjectARX, and the CAD networked import system comprises the following steps: the method comprises the steps that a CAD drawing is imported into a client side, the CAD drawing is built based on a preset browser, a drawing library is published based on the browser, the CAD drawing import client side and the drawing library carry out data transmission based on a web socket communication protocol, and the communication protocol comprises a callback method appointed by the CAD drawing import client side and the drawing library. The invention can directly import the editable CAD file content into the currently opened CAD file from the webpage end by one key. Complicated operation steps of downloading, waiting for software starting, selecting copying and pasting and the like are omitted, and production efficiency is improved.
Description
Technical Field
The invention relates to a CAD (computer-aided design) networked importing system and method, belonging to the field of software.
Background
At present, designers obtain CAD materials of a webpage end, need to download and then open specific files for content transfer, unnecessary working time is consumed in the process, and the operation burden of a computer is increased and the speed is reduced due to software starting, so that the production efficiency is reduced.
Disclosure of Invention
The invention aims to reduce the steps of acquiring materials by designers and the operation burden of a computer, save the working time and improve the production efficiency.
The invention adopts the following technical scheme:
a CAD networked import system developed based on ObjectARX, comprising: the method comprises the steps that a CAD drawing is imported into a client side, the CAD drawing is built based on a preset browser, a drawing library is published based on the browser, the CAD drawing import client side and the drawing library carry out data transmission based on a web socket communication protocol, and the communication protocol comprises a callback method appointed by the CAD drawing import client side and the drawing library.
Further, the CAD networked import system developed based on ObjectARX of the present invention is characterized in that: the method and parameters of the drawing import command interface based on the ObjectARX are preset between the CAD drawing import client and the drawing library.
Further, the CAD networked import system developed based on ObjectARX of the present invention is characterized in that: and the CAD drawing importing client receives the metadata information of the model storage address and the type transmitted by the parameters from the browser.
Further, the CAD networked import system developed based on ObjectARX of the present invention is characterized in that: and according to the appointed callback method between the CAD drawing import client and the drawing library, the browser informs the CAD drawing import client to finish automatic downloading and automatic import to the current manufacturing interface.
The invention also provides a CAD networked importing method developed based on ObjectARX, which is characterized by comprising the following steps:
1) web page request
A user directly accesses the model library system through a browser, submits a downloading and importing operation request through an Html webpage, and request data are transmitted to a server through parameters;
2) event determination and message delivery
The server judges whether the request data is the operation of downloading and importing the CAD drawing, automatically verifies the request data, submits the request data to a predetermined callback method, and transmits metadata information such as the storage address and the type of the drawing to the CAD drawing importing client;
3) drawing import
And after receiving the message, the CAD drawing importing client finishes the downloading and importing operation from the browser to the CAD design tool.
Further, the CAD networked importing method developed based on ObjectARX of the present invention has the following features: in step 3), the downloading and importing operation of the CAD drawing from the browser to the CAD design tool comprises the following steps: step 3-1, newly defining a database object to represent a file containing blocks, wherein the database object can be loaded into a memory but cannot be displayed in a CAD window, step 3-2, reading an external DWG file into the newly defined database object, and step 3-3, copying the block object in the external DWG file into the database of the current CAD to finish the downloading and importing operations from a browser to a CAD design tool.
Further, the CAD networked import system developed based on ObjectARX of the present invention is characterized in that: in step 3-2, the external DWG file is read into the newly defined Database object by calling the ReadDwgFile function of the Database class.
Further, the CAD networked import system developed based on ObjectARX of the present invention is characterized in that: in step 3-3, the block objects in the external DWG file are copied to the Database of the current CAD by calling the WblockCloneObjects function of the Database class.
Further, the CAD networked import system developed based on ObjectARX of the present invention is characterized in that: the ObjectARX application is a dynamically linked library that shares the address space of AutoCAD and directly calls the AutoCAD's functions.
The CAD networked importing system and the importing method can directly import the editable CAD file contents into the currently opened CAD file from a webpage end by one key. Complicated operation steps of downloading, waiting for software starting, selecting copying and pasting and the like are omitted, a large number of material acquisition steps and time are reduced, and the computer can operate at a higher speed to improve the production efficiency.
Drawings
FIG. 1 is a schematic diagram of the technical architecture of the present invention.
Detailed Description
The technical means of the present invention will be specifically described below by way of specific embodiments.
The system comprises: and importing the CAD drawing into a client and a drawing library issued by a browser, wherein the communication protocol of the client and the drawing library adopts a data transmission format based on WebSocket. As shown in fig. 1, the technical process includes:
1) event callback commitment
The CAD drawing import client and the drawing library reserve the method and the parameters of the interface based on the Objectarx drawing import command, and the following are core code examples:
voidCTrimeDraw::MyReadDwgFile(CStringstr)
AcDbDatabasepExternalDb(Adesk::kFalse)；
CString is a parameter appointed between a CAD drawing import client and a drawing library, a browser transmits metadata information such as model storage addresses, types and the like to the CAD drawing import client through the parameter, ReadwgFile is a callback method appointed by both parties, and the browser informs the CAD drawing import client of completing automatic downloading and automatic import to a current manufacturing interface.
2) Web page request
A user directly accesses the model library system through a browser, submits a downloading and importing operation request through an Html webpage, and request data are transmitted to a server through parameters.
3) Event determination and message delivery
The server judges whether the request data is the operation of downloading and importing the CAD drawing, if the judgment result is the operation of downloading and importing the CAD drawing, the request data is submitted to a predetermined callback method, and metadata information such as a drawing storage address, a drawing type and the like is transmitted to the CAD drawing importing client.
4) Drawing import
After receiving the message, the CAD drawing importing client defines a database object to represent the file containing the DWG file block, and the database object is loaded into the memory but not displayed in the CAD window. And calling a ReadDwgFile function of the Database class to read the external DWG file into the newly created Database object. And finally, calling a WblockCloneObjects function of the Database class to copy the block objects in the external DWG file into a current Database, and finally realizing the downloading and importing operations from the browser to the CAD design tool.
The invention is based on the application message transmission technology of the standard ObjectARX, and can rapidly access the AutoCAD graphic database. Different from the conventional AutoLISP and ADS, the ObjectARX application program is a dynamic link library DLL, shares the address space of the AutoCAD and carries out direct function call on the AutoCAD. Therefore, the execution speed of the function programmed using the ARX is greatly improved. The ARX class library adopts a standard encapsulation form of a C + + class library, so that the reliability and the efficiency of programmer programming are greatly improved.
The database structure, graphics system, and AutoCAD geometry construction core of AutoCAD are accessed directly with ObjectARX, and new classes are added to the ObjectARX programming environment and output for other programs to call. The created custom entity has no difference from the AutoCAD internal entity. The ObjectARX protocol may also be augmented at runtime by adding functions to existing AutoCAD classes. The external commands defined by ObjectARX are the same as the execution mechanism of AutoCAD internal commands.
The ObjectARX application program is a DLL program of Windows, AutoCAD itself is a typical Windows program, and Windows message passing mechanisms are adopted for direct communication between the ObjectARX application program and AutoCAD and Windows.
The ObjectARX application runs in the same address space as AutoCAD and can directly utilize the AutoCAD core database structure and code. The external command defined by the ObjectARX application is registered by the accedregcmds () macro. These external commands are executed by the AutoCAD itself as well as the commands inherent to the AutoCAD itself.
The ObjectARX application program is developed on the basis of a VisualC + + language and has the characteristics of data encapsulation, inheritability, polymorphism and the like in an object-oriented programming mode. The engineering CAD software developed by the method has the advantages of good modularity, strong independence, simple connection, convenient use, high-efficiency and practical internal functions, strong code reusability and the like, supports MFC libraries of Microsoft and can realize a plurality of complex functions simply and efficiently.
In the technology, the following four types of messages are used by AutoCAD for passing to the ObjectARX application:
■ message for transmitting to CAD drawing importing client program
■ messages transmitted only when a CAD drawing imports a client program to register an AutoLISP function using acededfun ()
■ to application messages that have registered for service with ObjectARX
■ messages that need to respond only to applications that use ActiveX controls
Table 1: AutoCAD messages to ObjectARX applications
Because the drawing has larger capacity and more data are carried by the drawing, the invention adopts a light-weight data transmission technology. The AJAX technology is called Asynchronus JavaScript And XML-asynchronous JavaScript And XML technology, And the application of the AJAX technology can enable an operation interface of Web application to generate the effect of an application program client window interface. In addition, the submission can be realized without refreshing the whole Web page, because the AJAX technology can provide the capability of asynchronous communication between the client browser program and the Web server program, so that a Web user is released from the request/response and the response efficiency of a Web application system is improved.
Because the same HTML tag content exists in all pages of the Web application system, such as page structure, format, Logo image at the top of the page, copyright and contact information at the bottom of the page, and the like, the difference is only a small portion of changed data content in the page that needs to be updated for display. In the application of a traditional Web application system requesting a response, each time the Web server generates an independent and complete Web page file content, the content is returned to the Web browser program of the client. The invention only transmits the required data, namely a small part of changed data content required to be updated and displayed in the Web page, thereby reducing the data volume output by the request response to the maximum extent and reducing the performance consumption caused to the Web server.
The importing system can be widely applied to the existing CAD software on the market, the test time for automatically downloading and importing 1 drawing with the size of 10M is shorter than 10 seconds after actual measurement, the efficiency is improved by more than 50% compared with the traditional method that the drawing is downloaded first and then imported through the CAD software, and the manufacturing efficiency and the collaborative design time of a drafter are greatly improved.
Claims (9)
1. A CAD networked import system developed based on ObjectARX, comprising:
importing the CAD drawing into a client, establishing the CAD drawing based on a preset browser,
the graph paper library, based on browser publishing,
the CAD drawing import client and the drawing library carry out data transmission based on a web socket communication protocol, and the communication protocol comprises a callback method appointed by the CAD drawing import client and the drawing library.
2. The CAD networked import system developed based on ObjectARX of claim 1, wherein:
the method and parameters of the drawing import command interface based on the ObjectARX are preset between the CAD drawing import client and the drawing library.
3. The CAD networked import system developed based on ObjectARX of claim 2, wherein:
and the CAD drawing importing client receives the metadata information of the model storage address and the type transmitted by the parameters from the browser.
4. The CAD networked import system developed based on ObjectARX of claim 1, wherein:
and according to the appointed callback method between the CAD drawing import client and the drawing library, the browser informs the CAD drawing import client to finish automatic downloading and automatic import to the current manufacturing interface.
5. A CAD networking importing method developed based on ObjectARX is characterized by comprising the following steps:
1) web page request
A user directly accesses the model library system through a browser, submits a downloading and importing operation request through an Html webpage, and request data are transmitted to a server through parameters;
2) event determination and message delivery
The server judges whether the request data is the operation of downloading and importing the CAD drawing, automatically verifies the request data, submits the request data to a predetermined callback method, and transmits metadata information such as the storage address and the type of the drawing to the CAD drawing importing client;
3) drawing import
And after receiving the message, the CAD drawing importing client finishes the downloading and importing operation from the browser to the CAD design tool.
6. The CAD networked import method developed based on ObjectARX of claim 5, wherein:
in step 3), the downloading and importing operation of the CAD drawing from the browser to the CAD design tool comprises the following steps: step 3-1, newly defining a database object to represent a file containing blocks, wherein the database object can be loaded into a memory but cannot be displayed in a CAD window, step 3-2, reading an external DWG file into the newly defined database object, and step 3-3, copying the block object in the external DWG file into the database of the current CAD to finish the downloading and importing operations from a browser to a CAD design tool.
7. The CAD networked import method developed based on ObjectARX of claim 5, wherein:
in step 3-2, the external DWG file is read into the newly defined Database object by calling the ReadDwgFile function of the Database class.
8. The CAD networked import method developed based on ObjectARX of claim 5, wherein:
in step 3-3, the block objects in the external DWG file are copied to the Database of the current CAD by calling the WblockCloneObjects function of the Database class.
9. The CAD networked import method developed based on ObjectARX of claim 6, wherein:
the ObjectARX application is a dynamically linked library that shares the address space of AutoCAD and directly calls the AutoCAD's functions.
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