CN115291842B - CAD structural member lightweight conversion and online browsing method and system - Google Patents
CAD structural member lightweight conversion and online browsing method and system Download PDFInfo
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Abstract
The invention relates to a CAD structural member lightweight conversion and online browsing method and system, wherein the method comprises the following steps: s1: a user submits a conversion request of a three-dimensional CAD model through an application system, a lightweight model conversion queue receives the conversion request, creates a conversion task, issues the conversion task, monitors the state of the conversion task and performs abnormal state processing; s2: the lightweight model conversion tool acquires a conversion task from the lightweight model conversion queue, and updates the task state after executing the conversion task; s3: and dynamically calculating according to the part space position matrix, rendering and loading in real time, and displaying according to the user requirement through the lightweight browsing component. The method provided by the invention thoroughly gets rid of the constraint of the assembly relation in the process of model conversion and light-weight display, and can realize independent conversion and dynamic loading of each model.
Description
Technical Field
The invention relates to the field of application software, in particular to a CAD structural member lightweight conversion and online browsing method and system.
Background
At present, the mainstream lightweight conversion and online browsing technology are usually taken as an integral independent node, and are coupled with an application system supported by the independent node, and particularly, the assembly is processed and converted as an integral model, and the method is specifically characterized in that: firstly, the model conversion tool and the conversion queue are in a strong coupling relation, the IP address of the node where the model conversion tool is positioned is often required to be configured or appointed in the conversion queue, and the queue is required to be suspended when the conversion tool needs to be replaced, adjusted or downtime and the execution of the model conversion is deadlocked; secondly, all sub-models of the lower layer of the assembly part are required to be loaded when the assembly part is converted, and when the conversion efficiency is low and the scale is large, the conversion tool has long execution time and large resource consumption, and is most likely to be down due to insufficient machine performance; third, fitting conversion is highly dependent on lower level sub-components, wherein failure of any one model file conversion will result in failure of the entire fitting conversion; fourth, online browsing tools can only browse the entire assembly, and it is difficult to achieve efficient on-demand loading and local browsing requirements when the assembly is large in size. Therefore, how to realize on-line light browsing in the processes of designing, processing, manufacturing, service guaranteeing, operation and maintenance of the management and storage CAD structural member becomes a problem to be solved urgently.
Disclosure of Invention
In order to solve the technical problems, the invention provides a CAD structural member lightweight conversion and online browsing method and system.
The technical scheme of the invention is as follows: a CAD structural member lightweight conversion and online browsing method comprises the following steps:
step S1: a user submits a conversion request of a three-dimensional CAD model through an application system, a lightweight model conversion queue receives the conversion request, creates a conversion task, issues the conversion task, monitors the state of the conversion task and performs abnormal state processing;
step S2: the lightweight model conversion tool acquires the conversion task from the lightweight model conversion queue, and updates the task state after executing the conversion task;
step S3: and dynamically calculating according to the part space position matrix, rendering and loading in real time, and displaying according to the user requirement through the lightweight browsing component.
Compared with the prior art, the invention has the following advantages:
1. the invention discloses a lightweight conversion and online browsing method for CAD structural members, which is characterized in that model conversion requests are uniformly received and centrally issued through a lightweight conversion queue, the conditions of how many nodes the model conversion tool has, which machines are distributed on, whether the model conversion tool is available at present or not and the like are not required to be concerned, the lightweight conversion queue is not influenced even if all the nodes fail, and the complete decoupling between the model conversion tool and the conversion queue is realized.
2. When the lightweight model conversion tool executes the conversion task, only a single model file is aimed at, the constraint of the assembly relation between other models is avoided, and the model file of the lower layer sub-assembly or part is not required to be loaded, so that the time and hardware resources required by model conversion are greatly reduced, the computer performance requirement on the conversion tool is greatly reduced, and parallel conversion of a plurality of lightweight model conversion tools can be realized.
3. The lightweight browsing component adopts a dynamic loading mechanism, so that the requirement on hardware is greatly reduced while the user can load according to the requirement; in addition, the threshold value of the number of the browsing parts is set, so that the problem that the client cannot load the too large model to cause abnormality is avoided.
Drawings
FIG. 1 is a flowchart of a CAD structural member lightweight conversion and online browsing method according to an embodiment of the present invention;
FIG. 2 is a schematic flow chart of a method for lightweight conversion and online browsing of CAD structural members according to an embodiment of the present invention;
fig. 3 is a block diagram of a CAD structure lightweight conversion and online browsing system according to an embodiment of the invention.
Detailed Description
The invention provides a CAD structural member lightweight conversion and online browsing method, which thoroughly gets rid of the constraint of assembly relation in the process of model conversion and lightweight display and can realize independent conversion and dynamic loading of each model.
The present invention will be further described in detail below with reference to the accompanying drawings by way of specific embodiments in order to make the objects, technical solutions and advantages of the present invention more apparent.
Example 1
As shown in fig. 1, the method for converting and browsing CAD structural parts in a lightweight manner comprises the following steps:
step S1: a user submits a conversion request of a three-dimensional CAD model through an application system, a lightweight model conversion queue receives the conversion request, creates a conversion task, issues the conversion task, monitors the state of the conversion task and performs abnormal state processing;
step S2: the lightweight model conversion tool acquires a conversion task from the lightweight model conversion queue, and updates the task state after executing the conversion task;
step S3: and dynamically calculating according to the part space position matrix, rendering and loading in real time, and displaying according to the user requirement through the lightweight browsing component.
As shown in fig. 2, in one embodiment, step S1 described above: the method comprises the steps that a user submits a conversion request of a three-dimensional CAD model through an application system, a lightweight model conversion queue receives the conversion request, creates a conversion task, issues the conversion task, monitors the state of the conversion task and processes abnormal states, and specifically comprises the following steps:
the method comprises the steps that a lightweight model conversion queue receives a conversion request from an application system, a corresponding conversion task is created, the state of the conversion task is set to be converted, and then the conversion task is issued, wherein each conversion task comprises a three-dimensional CAD model file;
and monitoring the state of the conversion task, and resetting the state of the conversion task to be converted when the state of the conversion task is abnormal.
In an embodiment of the present invention, a data structure of a lightweight model conversion queue includes: task number, task parameter, original file address, converted file address, task execution status, execution times, task creation time, task claim time, task completion time, and application system identification. The conversion task created by the lightweight model conversion queue only comprises a three-dimensional CAD model file, an unlimited number of lightweight model conversion tools can obtain the task in parallel and execute conversion, and then whether to close the task is determined according to the conversion result.
The lightweight model conversion queue provides two interfaces for receiving conversion requests and monitoring conversion tasks for the application system, and the application system can submit conversion through a calling interface, define the path of original model file downloading and lightweight model uploading and check the execution condition of the conversion requests; meanwhile, two interfaces of a claim conversion task and a conversion result are provided for the lightweight model conversion tool, and the lightweight model conversion tool calls the interface to acquire the task and updates the task state to be in conversion and updates the task state to be completed after conversion is completed.
The lightweight model conversion queue monitors the states of all conversion tasks in real time, and when the states of the conversion tasks are failed or cancelled, the states of the conversion tasks need to be reset to be converted, so that the conversion tasks can be claimed again by a lightweight model conversion tool for conversion.
According to the invention, the model conversion requests are uniformly received and issued in a centralized manner through the lightweight conversion queue, the situations that the model conversion tool has a plurality of nodes, is distributed on which machines, is available at present or not are not concerned, the lightweight conversion queue is not affected even if all the nodes fail, and the complete decoupling between the model conversion tool and the conversion queue is realized.
In one embodiment, step S2 above: the lightweight model conversion tool acquires a conversion task from the lightweight model conversion queue, and updates a task state after executing the conversion task, and specifically comprises the following steps:
when the light-weight model conversion tool monitors the task state in the light-weight model conversion queue in real time, acquiring a conversion task to be executed in the task state; once the acquisition is successful, changing the state of the conversion task into conversion;
when the lightweight model conversion tool executes a conversion task, a model file of a lower layer sub-assembly or part of the model file is not required to be loaded, and only the conversion of the current model file is performed; moreover, a plurality of lightweight model conversion tools can simultaneously execute a plurality of conversion tasks; any number of lightweight model conversion tools may be deployed at any node of the network reachable at the lightweight model conversion queue;
after the model conversion is executed, the conversion task state is updated to be completed.
The lightweight model conversion tool in the embodiment of the invention is mainly realized by secondary development based on the corresponding three-dimensional model design tool. The method comprises the steps of mainly obtaining an instance name, a file name, a space position matrix and an attribute of an assembly part corresponding to an assembly instance in the assembly part, and organizing the instance name, the file name, the space position matrix and the attribute of the assembly part into a structured text file; the parts are converted into a general structured model format (such as VRML, stl, step and the like) of a specified type, cut and retain geometric and visual information therein and attach part attribute information.
And automatically polling the task list to be executed in the lightweight model conversion queue by the lightweight model conversion tool according to the address of the lightweight model conversion queue in the configuration file, downloading the corresponding original model file after the task is converted, converting the original model file, and converting the original model file without loading the model file of the lower-layer sub-assembly or the part during model conversion, only reading the single model file of the assembly part, uploading the lightweight model file after the conversion is completed, updating the task state to be completed, and then continuously obtaining the task in the next waiting state. Any number of lightweight model conversion tools can be deployed on any node which is reachable by the lightweight conversion queue network, the plurality of lightweight model conversion tools can execute a plurality of conversion tasks in parallel, no precedence relation exists in complete decoupling among the conversion tasks, no sequence restriction exists when each conversion task is executed, the conversion tasks can be repeatedly executed, and automatic repeated execution and automatic switching of conversion machines are allowed to be set without affecting other conversion tasks. Moreover, the lightweight model conversion tool can be unloaded or closed at any time no matter it is idle or in execution, and other conversion tasks in execution are not affected.
And automatically retrying when uploading and downloading the original model file and the lightweight file are abnormal, wherein the original model file and the lightweight file still fail after 3 times of attempts, and updating the state of the conversion task to be cancelled. And when the conversion time length exceeds a preset threshold value, updating the conversion task state into conversion failure.
When the lightweight model conversion tool executes the conversion task, only a single model file is aimed at, the constraint of the assembly relation between other models is avoided, and the model file of the lower layer sub-assembly or part is not required to be loaded, so that the time and hardware resources required by model conversion are greatly reduced, the computer performance requirement on the conversion tool is greatly reduced, and parallel conversion of a plurality of lightweight model conversion tools can be realized.
In one embodiment, the step S3: according to the dynamic calculation of the part space position matrix, rendering and loading in real time, and displaying according to the user requirement through a lightweight browsing component, the method specifically comprises the following steps:
the light browsing component dynamically calculates all part examples according to the space position matrix, renders and loads in real time, and users select assembly parts to browse according to requirements by setting a threshold value of the number of display models.
The lightweight browsing component of the embodiment of the invention is based on the WEBGL technology of an open source (such as a thread. Js component or a Babylon component) and realizes operations of lightweight display, expansion and scaling (mouse wheel), translation (mouse middle key dragging), rotation (mouse right key dragging), explosion view and the like based on a WEB browser through an expansion model format loader, and provides two types of interfaces for highlighting selected part examples, obtaining information such as part assembly paths and attributes and the like for application system expansion.
The light browsing component is used for traversing the assembly structure tree to obtain all part information to be displayed aiming at the assembly display, and rendering all parts after dynamically calculating the absolute position according to the relative position of the assembly example, and partial model incomplete conversion can be displayed as conversion without unexpected abnormality. The situation of breakdown caused by insufficient performance of the client is prevented by setting a threshold value of the number of browsed models.
After the user hopes to only display part of the model for selection, parts which are not needed to be displayed are automatically filtered out through assembly traversal and then loaded in sequence, so that the user can browse specific requirements conveniently.
The lightweight browsing component adopts a dynamic loading mechanism, so that the requirement on hardware is greatly reduced while the user can load according to the requirement; in addition, the threshold value of the number of the browsing parts is set, so that the problem that the client cannot load the too large model to cause abnormality is avoided.
Example two
As shown in fig. 3, the embodiment of the invention provides a CAD structure lightweight conversion and online browsing system, which includes the following modules:
the light-weight model conversion queue module 41 is used for submitting a conversion request of the three-dimensional CAD model through an application system, receiving the conversion request, creating a conversion task, issuing the conversion task, monitoring the state of the conversion task and performing abnormal state processing;
the light-weight model conversion module 42 is configured to obtain a conversion task from the light-weight model conversion queue by using a light-weight model conversion tool, and update a task state after executing the conversion task;
the light browsing component module 43 is configured to dynamically calculate in real time according to the part space position matrix, render and load, and display according to user requirements through the light browsing component.
The above examples are provided for the purpose of describing the present invention only and are not intended to limit the scope of the present invention. The scope of the invention is defined by the appended claims. Various equivalents and modifications that do not depart from the spirit and principles of the invention are intended to be included within the scope of the invention.
Claims (2)
1. The light-weight conversion and online browsing method for the CAD structural member is characterized by comprising the following steps of:
step S1: a user submits a conversion request of a three-dimensional CAD model through an application system, a lightweight model conversion queue receives the conversion request, creates a conversion task, issues the conversion task, monitors the state of the conversion task and performs abnormal state processing, and the method specifically comprises the following steps:
the lightweight model conversion queue receives the conversion request from the application system, creates a corresponding conversion task, sets the state of the conversion task as to-be-converted and then issues the conversion task, wherein each conversion task comprises a three-dimensional CAD model file;
monitoring the state of the conversion task, and resetting the state of the conversion task to be converted when the state of the conversion task is abnormal;
step S2: the lightweight model conversion tool acquires the conversion task from the lightweight model conversion queue, and updates the task state after executing the conversion task, and specifically comprises the following steps:
when the lightweight model conversion tool is used, monitoring task states in the lightweight model conversion queue in real time, and acquiring conversion tasks to be executed in the states; once the acquisition is successful, changing the state of the conversion task into conversion;
when the light model conversion tool executes the conversion task, a model file of a lower sub-assembly or part of the model file is not required to be loaded, and only the current model file is converted; and, a plurality of the lightweight model conversion tools may perform a plurality of the conversion tasks simultaneously; any number of the lightweight model conversion tools may be deployed at any node of the network reachable at the lightweight model conversion queue;
after the model conversion is executed, updating the state of the conversion task to be finished;
step S3: according to the dynamic calculation of the part space position matrix, rendering and loading in real time, and displaying according to the user requirement through a lightweight browsing component, the method specifically comprises the following steps:
the lightweight browsing component dynamically calculates, renders and loads in real time according to a space position matrix by all part examples, and prevents the situation of breakdown caused by insufficient performance of a client by setting a threshold value of the number of display models; and the user selects the assembly part to browse according to the requirement, and the assembly part is automatically filtered out parts which do not need to be displayed after traversing and then sequentially loaded, so that the user can browse according to the specific requirement.
2. The CAD structural member light conversion and online browsing system is characterized by comprising the following modules:
the lightweight model conversion queue module is used for submitting a conversion request of a three-dimensional CAD model through an application system, receiving the conversion request, creating a conversion task, releasing the conversion task, monitoring the state of the conversion task and performing abnormal state processing, and specifically comprises the following steps:
the lightweight model conversion queue receives the conversion request from the application system, creates a corresponding conversion task, sets the state of the conversion task as to-be-converted and then issues the conversion task, wherein each conversion task comprises a three-dimensional CAD model file;
monitoring the state of the conversion task, and resetting the state of the conversion task to be converted when the state of the conversion task is abnormal;
the light-weight model conversion module is used for acquiring the conversion task from the light-weight model conversion queue by a light-weight model conversion tool, and updating the task state after executing the conversion task, and specifically comprises the following steps:
when the lightweight model conversion tool is used, monitoring task states in the lightweight model conversion queue in real time, and acquiring conversion tasks to be executed in the states; once the acquisition is successful, changing the state of the conversion task into conversion;
when the light model conversion tool executes the conversion task, a model file of a lower sub-assembly or part of the model file is not required to be loaded, and only the current model file is converted; and, a plurality of the lightweight model conversion tools may perform a plurality of the conversion tasks simultaneously; any number of the lightweight model conversion tools may be deployed at any node of the network reachable at the lightweight model conversion queue;
after the model conversion is executed, updating the state of the conversion task to be finished;
the lightweight browse component module is used for dynamically calculating in real time according to the part space position matrix, rendering and loading, and displaying according to the user requirement through the lightweight browse component, and specifically comprises the following steps:
the lightweight browsing component dynamically calculates, renders and loads in real time according to a space position matrix by all part examples, and prevents the situation of breakdown caused by insufficient performance of a client by setting a threshold value of the number of display models; and the user selects the assembly part to browse according to the requirement, and the assembly part is automatically filtered out parts which do not need to be displayed after traversing and then sequentially loaded, so that the user can browse according to the specific requirement.
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