CN110765507A - Three-dimensional CAD (computer-aided design) modeling method, device and system based on cloud service technology - Google Patents

Abstract

The application discloses three-dimensional CAD modeling method, device and system based on cloud service technology, and a cloud server and a client, wherein the method is applied to the cloud server which deploys a CAD environment in advance, and comprises the following steps: receiving sketch drawing parameters; carrying out sketch operation according to the sketch drawing parameters, and generating a corresponding two-dimensional sketch on a drawing plane; receiving three-dimensional operation parameters input by a user and forwarded by a client, performing three-dimensional characteristic operation on the two-dimensional sketch based on the three-dimensional operation parameters, and generating three-dimensional point and normal vector information after dispersion; and returning the three-dimensional point and the normal vector information after the dispersion to the client so that the client can render and generate the three-dimensional CAD model according to the three-dimensional point and the normal vector information after the dispersion. According to the method and the device, the sketch drawing parameters and the three-dimensional operation parameters forwarded by the client are received by the cloud server, so that the process of downloading the CAD with the huge installation package is avoided, and the working efficiency is obviously improved.

Description

A 3D CAD modeling method, device and system based on cloud service technology

technical field

The present application relates to the technical field of computer-aided design, and more particularly, to a three-dimensional CAD modeling method, device, and system based on cloud service technology, a cloud server and a client.

Background technique

3D CAD (Computer Aided Design, Computer Aided Design) software is a design and manufacturing engineering software widely used in machinery, architecture, electrical appliances, civil engineering and other fields. It can perform rich 2D sketch operations and 3D feature operations. At present, the traditional local CAD software installation packages represented by SolidWorks, UG, and ProE are huge, the installation process is complicated, and the design efficiency of such software is low, thereby reducing work efficiency.

SUMMARY OF THE INVENTION

The purpose of this application is to provide a 3D CAD modeling method, device, and system based on cloud service technology, a cloud server and a client, which significantly improves work efficiency.

In order to achieve the above purpose, the present application provides a three-dimensional CAD modeling method based on cloud service technology, which is applied to a cloud server that pre-deploys a CAD environment, and the method includes:

Receive sketching parameters; the sketching parameters are the drawing parameters for the drawing plane that are received by the client and forwarded to the user of the cloud server;

Perform a sketch operation according to the sketch drawing parameters, and generate a corresponding two-dimensional sketch on the drawing plane;

receiving the 3D operation parameters input by the user forwarded by the client, and performing 3D feature operations on the 2D sketch based on the 3D operation parameters to generate discrete 3D point and normal vector information;

Returning the discrete three-dimensional point and normal vector information to the client, so that the client can render and generate a three-dimensional CAD model according to the discrete three-dimensional point and normal information.

Optionally, also include:

The process of performing the sketch operation according to the sketch drawing parameters and the process of performing the three-dimensional feature operation on the two-dimensional sketch based on the three-dimensional operation parameters are recorded.

Optionally, also include:

Get the account information of the currently logged in user;

Find the account information in the preset user database;

If the account information is successfully searched, obtain the historical 3D CAD model corresponding to the account information and the creation process information corresponding to the historical 3D CAD model;

If the account information search fails, basic information of the currently logged-in user is acquired, and registration of the currently logged-in user is performed.

In order to achieve the above purpose, the present application provides a 3D CAD modeling method based on cloud service technology, which is applied to the client, and the method includes:

Receive the sketching parameters for the drawing plane entered by the user;

forwarding the sketching parameters to a cloud server pre-deployed in a CAD environment, so that the cloud server performs sketch operations according to the sketching parameters, and generates a corresponding two-dimensional sketch on the drawing plane;

receiving the three-dimensional operation parameters entered by the user and forwarding them to the cloud server, so that the cloud server performs three-dimensional feature operations on the two-dimensional sketch based on the three-dimensional operation parameters, and generates discrete three-dimensional point and normal vector information;

Obtain the discrete three-dimensional point and normal vector information returned by the cloud server, and generate a three-dimensional CAD model according to the discrete three-dimensional point and normal information.

Optionally, before receiving the sketch drawing parameters for the drawing plane entered by the user, the method further includes:

Receive a start instruction for starting sketching, and determine the drawing plane corresponding to the start instruction;

Judging whether the drawing plane satisfies the condition of being a sketch drawing plane;

If so, display the drawing plane through a visual interface, and start the step of receiving the sketching parameters for the drawing plane entered by the user after the display;

If not, error prompt information is displayed through the notification bar of the visual interface.

In order to achieve the above purpose, the present application provides a three-dimensional CAD modeling device based on cloud service technology, which is applied to a cloud server that pre-deploys a CAD environment, and the device includes:

a first receiving module, configured to receive sketching parameters; the sketching parameters are the drawing parameters for the drawing plane entered by the client and forwarded to the cloud server;

a sketch operation module, configured to perform sketch operation according to the sketch drawing parameters, and generate a corresponding two-dimensional sketch on the drawing plane;

a three-dimensional operation module, configured to receive the three-dimensional operation parameters input by the user forwarded by the client, and perform three-dimensional feature operations on the two-dimensional sketch based on the three-dimensional operation parameters to generate discrete three-dimensional point and normal vector information;

An information return module, configured to return the discrete three-dimensional point and normal vector information to the client, so that the client can render and generate a three-dimensional CAD model according to the discrete three-dimensional point and normal information.

In order to achieve the above purpose, the present application provides a 3D CAD modeling device based on cloud service technology, which is applied to the client, and the device includes:

The second receiving module is used to receive the sketching parameters for the drawing plane entered by the user;

a first forwarding module, configured to forward the sketch drawing parameters to a cloud server pre-deployed in a CAD environment, so that the cloud server performs sketch operations according to the sketch drawing parameters, and generates a corresponding two-dimensional drawing on the drawing plane sketch;

The second forwarding module is configured to receive the three-dimensional operation parameters entered by the user and forward them to the cloud server, so that the cloud server can perform three-dimensional feature operations on the two-dimensional sketch based on the three-dimensional operation parameters, and generate a discrete 3D point and normal vector information;

A three-dimensional rendering module, configured to obtain the discrete three-dimensional point and normal vector information returned by the cloud server, and generate a three-dimensional CAD model according to the discrete three-dimensional point and normal vector information.

To achieve the above purpose, the present application provides a cloud server, where the cloud server pre-deploys a CAD environment, including:

memory for storing computer programs;

The processor is configured to implement any one of the steps of the 3D CAD modeling method disclosed above and executed by the cloud server side when executing the computer program.

To achieve the above purpose, the present application provides a client, including:

memory for storing computer programs;

The processor is configured to implement any one of the steps of the three-dimensional CAD modeling method disclosed above and executed by the client side when executing the computer program.

To achieve the above purpose, the application provides a three-dimensional CAD modeling system based on cloud service technology, including:

The cloud server disclosed above, and the client disclosed above.

It can be seen from the above solutions that a 3D CAD modeling method based on cloud service technology provided by the present application is applied to a cloud server that pre-deploys a CAD environment, and the method includes: receiving sketching parameters; the sketching parameters are the client Receive and forward the drawing parameters for the drawing plane entered by the user of the cloud server; perform sketch operations according to the sketch drawing parameters, and generate a corresponding two-dimensional sketch on the drawing plane; receive the user input forwarded by the client 3D operation parameters, and perform 3D feature operation on the 2D sketch based on the 3D operation parameters to generate discrete 3D point and normal vector information; return the discrete 3D point and normal vector information to the client terminal, so that the client can render and generate a three-dimensional CAD model according to the discrete three-dimensional point and normal vector information. It can be seen from the above that the present application uses the cloud server to receive the sketch drawing parameters and the three-dimensional operation parameters forwarded by the client, generates the discrete three-dimensional point and normal vector information based on the above information, and returns the discrete three-dimensional point and normal vector information to the client. , so that the client can render a 3D CAD model according to the discrete 3D point and normal vector information, avoid the process of downloading CAD with a huge installation package, and significantly improve the work efficiency.

The present application also discloses a 3D CAD modeling device and system based on cloud service technology, a cloud server and a client, which can also achieve the above technical effects.

It is to be understood that the foregoing general description and the following detailed description are exemplary only and do not limit the application.

Description of drawings

In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the following briefly introduces the accompanying drawings required for the description of the embodiments or the prior art. Obviously, the drawings in the following description are only These are some embodiments of the present application. For those of ordinary skill in the art, other drawings can also be obtained based on these drawings without any creative effort.

1 is a flowchart of a three-dimensional CAD modeling method based on cloud service technology disclosed in an embodiment of the application;

2 is a flowchart of another 3D CAD modeling method based on cloud service technology disclosed in an embodiment of the application;

3 is a structural diagram of a 3D CAD modeling device based on cloud service technology disclosed in an embodiment of the application;

FIG. 4 is a structural diagram of another 3D CAD modeling device based on cloud service technology disclosed in an embodiment of the application;

FIG. 5 is a structural diagram of a cloud server disclosed in an embodiment of the application;

FIG. 6 is a structural diagram of a client disclosed in an embodiment of the present application;

FIG. 7 is a structural diagram of another client disclosed in an embodiment of the present application;

8 is a structural diagram of a three-dimensional CAD modeling system based on cloud service technology disclosed in an embodiment of the application;

9 is a structural diagram of a specific three-dimensional CAD modeling system based on cloud service technology disclosed in an embodiment of the application;

FIG. 10 is a schematic diagram of a specific user interface disclosed in an embodiment of the present application.

Detailed ways

The technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application. Obviously, the described embodiments are only a part of the embodiments of the present application, but not all of the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present application.

In the prior art, the traditional local CAD software installation packages represented by SolidWorks, UG, and ProE are huge, the installation process is complicated, and the design efficiency of such software is low, thereby reducing work efficiency.

Therefore, the embodiments of the present application disclose a 3D CAD modeling method based on cloud service technology, which significantly improves work efficiency.

Referring to FIG. 1 , a 3D CAD modeling method based on cloud service technology disclosed in an embodiment of the present application is applied to a cloud server where a CAD environment is pre-deployed. Referring to FIG. 1 , the method includes:

S101: Receive a sketching parameter; the sketching parameter is a drawing parameter for a drawing plane entered by a user received by a client and forwarded to the cloud server;

In the embodiment of the present application, the CAD environment is pre-deployed in the cloud server, and a back-end framework is built to connect the CAD kernel environment and the client. In addition, a front-end user interface can also be designed in advance, which includes a three-dimensional display area and two-dimensional controls, and the client can receive sketching parameters issued by the user through the front-end user interface. Specifically, the client can provide the drawing plane to the user, so that the user can issue the drawing parameters for the drawing plane and forward it to the cloud server.

S102: Perform a sketch operation according to the sketch drawing parameters, and generate a corresponding two-dimensional sketch on the drawing plane;

After the cloud server receives the above sketching parameters, it will transport the sketches according to the sketching parameters to generate the corresponding two-dimensional sketches.

S103: Receive the 3D operation parameters input by the user and forwarded by the client, and perform 3D feature operation on the 2D sketch based on the 3D operation parameters to generate discrete 3D point and normal vector information;

In this step, the client can receive the 3D operation parameters input by the user through the user interface, so as to perform 3D feature operation on the 2D sketch based on the 3D operation parameters, and generate discrete 3D point and normal vector information.

S104: Return the discrete three-dimensional point and normal vector information to the client, so that the client can render and generate a three-dimensional CAD model according to the discrete three-dimensional point and normal information.

After the cloud server obtains the discrete 3D point and normal vector information, the discrete 3D point and normal vector information is returned to the client, and the client can render and generate a 3D CAD model according to the discrete 3D point and normal vector information.

As a preferred implementation, in this embodiment of the present application, the above-mentioned process of performing sketch operations based on sketch drawing parameters and the process of performing three-dimensional feature operations on two-dimensional sketches based on three-dimensional operation parameters can also be recorded. The model file database is saved.

Further, considering that the existing technology does not support team collaboration and multi-location and multi-terminal login viewing, the flexibility and efficient design of large-scale engineering projects are obviously limited. To this end, the embodiment of the present application can bind a corresponding account for each user, and specifically, obtain account information of the currently logged-in user; search for the account information in a preset user database; if the account information is successfully searched, then Acquire the historical 3D CAD model corresponding to the account information and the creation process information corresponding to the historical 3D CAD model; if the account information search fails, acquire the basic information of the currently logged in user, and perform a register. As a result, multiple terminals can share results after logging in with the same account. Compared with the limitation that traditional CAD can only be used on a local computer, the embodiments of the present application can realize mobile office and data exchange between different platforms.

It can be seen from the above solutions that a 3D CAD modeling method based on cloud service technology provided by the present application is applied to a cloud server that pre-deploys a CAD environment, and the method includes: receiving sketching parameters; the sketching parameters are the client Receive and forward the drawing parameters for the drawing plane entered by the user of the cloud server; perform sketch operations according to the sketch drawing parameters, and generate a corresponding two-dimensional sketch on the drawing plane; receive the user input forwarded by the client 3D operation parameters, and perform 3D feature operation on the 2D sketch based on the 3D operation parameters to generate discrete 3D point and normal vector information; return the discrete 3D point and normal vector information to the client terminal, so that the client can render and generate a three-dimensional CAD model according to the discrete three-dimensional point and normal vector information. It can be seen from the above that the present application uses the cloud server to receive the sketch drawing parameters and the three-dimensional operation parameters forwarded by the client, generates the discrete three-dimensional point and normal vector information based on the above information, and returns the discrete three-dimensional point and normal vector information to the client. , so that the client can render a 3D CAD model according to the discrete 3D point and normal vector information, avoid the process of downloading CAD with a huge installation package, and significantly improve the work efficiency.

The embodiment of the present application discloses another three-dimensional CAD modeling method, which is applied to the client, specifically:

Referring to FIG. 2 , a flowchart of another 3D CAD modeling method based on cloud service technology provided by an embodiment of the present application, as shown in FIG. 2 , includes:

S201: Receive the sketch drawing parameters for the drawing plane entered by the user;

In the embodiment of the present application, before receiving the sketching parameters for the drawing plane entered by the user, a start instruction for starting sketching may also be received, and the drawing plane corresponding to the start instruction is determined; Conditions for the sketching plane; if yes, display the drawing plane through the visual interface, and start the step of receiving the sketching parameters entered by the user for the drawing plane after the presentation; The notification bar displays an error message.

S202: Forward the sketch drawing parameters to a cloud server pre-deployed in a CAD environment, so that the cloud server performs sketch operations according to the sketch drawing parameters, and generates a corresponding two-dimensional sketch on the drawing plane;

S203: Receive the three-dimensional operation parameters entered by the user and forward them to the cloud server, so that the cloud server performs three-dimensional feature operations on the two-dimensional sketch based on the three-dimensional operation parameters, and generates discrete three-dimensional points and normal vectors information;

S204: Acquire the discrete three-dimensional point and normal vector information returned by the cloud server, and generate a three-dimensional CAD model by rendering according to the discrete three-dimensional point and normal vector information.

A 3D CAD modeling apparatus provided by an embodiment of the present application is introduced below. A 3D CAD modeling apparatus described below and a 3D CAD modeling method described above can be referred to each other.

Referring to FIG. 3 , a structure diagram of a 3D CAD modeling device based on cloud service technology provided by an embodiment of the present application, as shown in FIG. 3 , is applied to a cloud server that pre-deploys a CAD environment, and the device includes:

The first receiving module 301 is configured to receive sketching parameters; the sketching parameters are the drawing parameters for the drawing plane that are received by the client and forwarded to the cloud server and entered by the user;

a sketch operation module 302, configured to perform a sketch operation according to the sketch drawing parameters, and generate a corresponding two-dimensional sketch on the drawing plane;

A three-dimensional operation module 303, configured to receive three-dimensional operation parameters input by a user forwarded by the client, and perform three-dimensional feature operations on the two-dimensional sketch based on the three-dimensional operation parameters to generate discrete three-dimensional point and normal vector information;

The information return module 304 is configured to return the discrete three-dimensional point and normal vector information to the client, so that the client can render and generate a three-dimensional CAD model according to the discrete three-dimensional point and normal information.

For the specific implementation process of the foregoing modules 301 to 304 , reference may be made to the corresponding content disclosed in the foregoing embodiments, which will not be repeated here.

Another three-dimensional CAD modeling apparatus provided by the embodiments of the present application will be introduced below. The three-dimensional CAD modeling apparatus described below and the three-dimensional CAD modeling method described above can be referred to each other.

Referring to FIG. 4 , a structural diagram of another 3D CAD modeling device based on cloud service technology provided by an embodiment of the present application, as shown in FIG. 4 , is applied to a client, and the device includes:

The second receiving module 401 is configured to receive the sketching parameters for the drawing plane entered by the user;

The first forwarding module 402 is used for forwarding the sketching parameters to a cloud server pre-deployed in a CAD environment, so that the cloud server performs sketch operations according to the sketching parameters, and generates corresponding two on the drawing plane. dimensional sketches;

The second forwarding module 403 is configured to receive the three-dimensional operation parameters entered by the user and forward them to the cloud server, so that the cloud server can perform three-dimensional feature operations on the two-dimensional sketch based on the three-dimensional operation parameters to generate discrete Post 3D point and normal vector information;

The 3D rendering module 404 is configured to acquire the discrete 3D point and normal vector information returned by the cloud server, and generate a 3D CAD model according to the discrete 3D point and normal vector information.

For the specific implementation process of the foregoing modules 401 to 404, reference may be made to the corresponding content disclosed in the foregoing embodiments, and details are not described herein again.

The present application also provides a cloud server. The cloud server 11 pre-deploys a CAD environment. Referring to FIG. 5 , the cloud server 11 provided by the embodiment of the present application includes:

a memory 501 for storing computer programs;

The processor 502 is configured to implement the steps of the three-dimensional CAD modeling method performed by the cloud server side disclosed in any of the foregoing embodiments when executing the computer program.

The present application further provides a client. Referring to FIG. 6 , a client 12 provided by an embodiment of the present application includes:

memory 601 for storing computer programs;

The processor 602 is configured to implement the steps of the 3D CAD modeling method performed by the client side disclosed in any of the foregoing embodiments when the computer program is executed.

Specifically, the memory 601 includes a non-volatile storage medium and an internal memory. The non-volatile storage medium stores an operating system and computer-readable instructions, and the internal memory provides an environment for the operation of the operating system and the computer-readable instructions in the non-volatile storage medium. In some embodiments, the processor 602 may be a central processing unit (Central Processing Unit, CPU), controller, microcontroller, microprocessor or other data processing chip, and provides computing and control capabilities for the client 11 to execute the When the computer program stored in the memory 601 is used, the steps of any one of the methods for processing simulation of an IoT robot disclosed above and executed by the client side can be implemented.

On the basis of the foregoing embodiment, as a preferred implementation manner, as shown in FIG. 7 , the client 11 further includes:

The input interface 603 is connected to the processor 602 , and is used for acquiring externally imported computer programs, parameters and instructions, which are stored in the memory 601 under the control of the processor 602 . The input interface 603 can be connected with an input device, and receives parameters or instructions manually input by the user. The input device may be a touch layer covered on the display screen, or a key, a trackball or a touchpad provided on the terminal shell, or a keyboard, a touchpad, or a mouse, or the like.

The display unit 604, connected to the processor 602, is used for displaying data processed by the processor 602 and for displaying a visual user interface. The display unit 604 may be an LED display, a liquid crystal display, a touch-sensitive liquid crystal display, an OLED (Organic Light-Emitting Diode, organic light-emitting diode) touch device, and the like.

The network port 605 is connected to the processor 602 and is used for communicating with external terminal devices. The communication technology used for the communication connection can be wired communication technology or wireless communication technology, such as Mobile High Definition Link Technology (MHL), Universal Serial Bus (USB), High Definition Multimedia Interface (HDMI), Wireless Fidelity Technology (WiFi), Bluetooth communication technology, Bluetooth low energy communication technology, communication technology based on IEEE802.11s, etc.

FIG. 7 only shows a client with components 601-605. Those skilled in the art can understand that the structure shown in FIG. 7 does not constitute a limitation on the client, and may include fewer or more components than those shown in the drawings. , or a combination of certain components, or a different arrangement of components.

The present application also provides a 3D CAD modeling system based on cloud service technology, as shown in FIG. 8 , including: the cloud server 11 disclosed above and the client 12 disclosed above.

In a specific embodiment, as shown in FIG. 9 , the three-dimensional CAD modeling system can be mainly divided into three parts: an application layer, a service layer, and a data layer. The application layer refers to the software for building browsers that can run on WebGL, and the interface development will be divided into the development of 2D controls and the development of 3D display areas; the service layer refers to the environment deployed on cloud servers, including web servers, back-end frameworks, The CAD kernel and related computing dependencies are mainly responsible for complex data operation and processing. The data layer includes records of user login and registration data, model file information records and step data records.

After the cloud CAD is deployed on the cloud server, the user accesses the server-side resources through the browser, and can be operated after successfully loaded, as shown in FIG. The menu bar 21 includes sketch features and three-dimensional features, and the user can complete the establishment of sketches and the realization of three-dimensional features according to the description of the corresponding icons; the information area 22 is used to record the step information of sketch operations and three-dimensional feature operations, and complete the modeling steps and models. The corresponding relationship between entities, and the information prompt of modeling will be notified by the notification bar in the information area; the three-dimensional display area 23 is the interactive and display part of the three-dimensional model, which can display three-dimensional objects 24, and all modeling operations and processes are here. Rendering, including camera rotation, zooming in and out, panning operations, etc.

For the workstation environment of the cloud CAD system, including the configuration of the server and the client, both the hardware environment and the software environment are included. Among them, the server side: for the hardware environment, the basic configuration is: CPU: Intel Xeon Gold6149 8 cores; memory: 32G; for the software environment, the basic configuration in the server is: Ubuntu16.0.4/Centos; Anaconda/MiniConda. Client: For the hardware environment, the basic configuration is: CPU: Intel Core i3 or above; Memory: 1G or above; Hard Disk: 100G or above; Network card: MODEM or 10M/100M network card; For the software environment, the following must be installed in the computer Software: (1) Windows 2003/XP/7/8/8.1/10; (2) Firefox 4+/Google Chrome 9+/Opera 12+/Safari 5.1+/IE 11+.

The embodiments of the present application can be deployed and run on the Internet, and will have better ease of use. At the same time, the technical advantages of WebGL will be inherited, and the technical disadvantages of various graphics plug-ins will be discarded, resulting in openness and portability that are better than plug-ins. , availability, security, load capacity. Combining the respective advantages of the cloud server and the local client, the complex operation is handed over to the cloud server, and the simple graphics display is rendered on the client side, which greatly reduces the pressure on the client side, and can produce higher computing efficiency and smoother 3D display effect. In addition, it supports the account system and the way of storing user information in the form of login and registered accounts, which realizes the cloudification of the 3D CAD design process, and realizes mobile office anytime, anywhere, and can create models after login and share results with multiple terminals. Significantly improve work efficiency and reduce the cost of use.

The various embodiments in the specification are described in a progressive manner, and each embodiment focuses on the differences from other embodiments, and the same and similar parts between the various embodiments can be referred to each other. For the system disclosed in the embodiment, since it corresponds to the method disclosed in the embodiment, the description is relatively simple, and the relevant part can be referred to the description of the method. It should be pointed out that for those of ordinary skill in the art, without departing from the principles of the present application, several improvements and modifications can also be made to the present application, and these improvements and modifications also fall within the protection scope of the claims of the present application.

It should also be noted that, in this specification, relational terms such as first and second, etc. are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply these entities or operations. There is no such actual relationship or sequence between operations. Moreover, the terms "comprising", "comprising" or any other variation thereof are intended to encompass a non-exclusive inclusion such that a process, method, article or device that includes a list of elements includes not only those elements, but also includes not explicitly listed or other elements inherent to such a process, method, article or apparatus. Without further limitation, an element qualified by the phrase "comprising a..." does not preclude the presence of additional identical elements in a process, method, article or apparatus that includes the element.

Claims (10)

1. A three-dimensional CAD modeling method based on a cloud service technology is applied to a cloud server in a pre-deployed CAD environment, and the method comprises the following steps:

receiving sketch drawing parameters; the sketch drawing parameter is a drawing parameter which is input by a client and forwarded to the cloud server and aims at a drawing plane;

carrying out sketch operation according to the sketch drawing parameters, and generating a corresponding two-dimensional sketch on the drawing plane;

receiving three-dimensional operation parameters input by a user and forwarded by the client, and performing three-dimensional characteristic operation on the two-dimensional sketch based on the three-dimensional operation parameters to generate three-dimensional point and normal vector information after dispersion;

and returning the dispersed three-dimensional point and normal vector information to the client, so that the client renders and generates a three-dimensional CAD model according to the dispersed three-dimensional point and normal vector information.

2. The three-dimensional CAD modeling method of claim 1, further comprising:

and recording the process of carrying out sketch operation according to the sketch drawing parameters and the process of carrying out three-dimensional characteristic operation on the two-dimensional sketch based on the three-dimensional operation parameters.

3. The three-dimensional CAD modeling method according to claim 1 or 2, further comprising:

acquiring account information of a current login user;

searching the account information in a preset user database;

if the account information is successfully searched, acquiring a historical three-dimensional CAD model corresponding to the account information and creating process information corresponding to the historical three-dimensional CAD model;

and if the account information search fails, acquiring the basic information of the current login user, and registering the current login user.

4. A three-dimensional CAD modeling method based on cloud service technology is applied to a client side, and the method comprises the following steps:

receiving sketch drawing parameters aiming at a drawing plane, which are input by a user;

forwarding the sketch drawing parameters to a cloud server in a pre-deployed CAD environment, so that the cloud server performs sketch operation according to the sketch drawing parameters, and generating a corresponding two-dimensional sketch on the drawing plane;

receiving three-dimensional operation parameters input by a user and forwarding the three-dimensional operation parameters to the cloud server so that the cloud server performs three-dimensional feature operation on the two-dimensional sketch based on the three-dimensional operation parameters to generate three-dimensional points and normal vector information after dispersion;

and obtaining the three-dimensional point and normal vector information after the dispersion returned by the cloud server, and rendering and generating a three-dimensional CAD model according to the three-dimensional point and normal vector information after the dispersion.

5. The three-dimensional CAD modeling method according to claim 4, wherein said receiving user-entered sketch drawing parameters for a drawing plane further comprises:

receiving a starting instruction for starting sketch drawing, and determining a drawing plane corresponding to the starting instruction;

judging whether the drawing plane meets the condition of being used as a sketch drawing plane;

if so, displaying the drawing plane through a visual interface, and starting the step of receiving sketch drawing parameters aiming at the drawing plane and input by a user after displaying;

and if not, displaying error prompt information through a notification bar of the visual interface.

6. A three-dimensional CAD modeling device based on cloud service technology is applied to a cloud server of a pre-deployed CAD environment, and the device comprises:

the first receiving module is used for receiving sketch drawing parameters; the sketch drawing parameter is a drawing parameter which is input by a client and forwarded to the cloud server and aims at a drawing plane;

the sketch operation module is used for carrying out sketch operation according to the sketch drawing parameters and generating a corresponding two-dimensional sketch on the drawing plane;

the three-dimensional operation module is used for receiving the three-dimensional operation parameters input by the user and forwarded by the client, performing three-dimensional characteristic operation on the two-dimensional sketch based on the three-dimensional operation parameters, and generating three-dimensional point and normal vector information after dispersion;

and the information returning module is used for returning the dispersed three-dimensional point and normal vector information to the client so that the client can render and generate the three-dimensional CAD model according to the dispersed three-dimensional point and normal vector information.

7. A three-dimensional CAD modeling device based on cloud service technology is characterized by being applied to a client side, and the device comprises:

the second receiving module is used for receiving sketch drawing parameters aiming at the drawing plane, which are input by a user;

the first forwarding module is used for forwarding the sketch drawing parameters to a cloud server in a pre-deployed CAD environment, so that the cloud server performs sketch operation according to the sketch drawing parameters and generates a corresponding two-dimensional sketch on the drawing plane;

the second forwarding module is used for receiving the three-dimensional operation parameters input by the user and forwarding the three-dimensional operation parameters to the cloud server so that the cloud server performs three-dimensional feature operation on the two-dimensional sketch based on the three-dimensional operation parameters to generate three-dimensional point and normal vector information after dispersion;

and the three-dimensional rendering module is used for acquiring the three-dimensional point and normal vector information after the dispersion returned by the cloud server and rendering and generating a three-dimensional CAD model according to the three-dimensional point and normal vector information after the dispersion.

8. The cloud server is characterized in that the cloud server pre-deploys a CAD environment, and comprises:

a memory for storing a computer program;

a processor for implementing the steps of the three-dimensional CAD modeling method according to any of claims 1 to 3 when executing the computer program.

9. A client, comprising:

a memory for storing a computer program;

a processor for implementing the steps of the three-dimensional CAD modeling method as claimed in claim 4 or 5 when executing the computer program.

10. A three-dimensional CAD modeling system based on cloud service technology is characterized by comprising:

a cloud server as claimed in claim 8, and a client as claimed in claim 9.

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