CN114155341A - Cross-platform consistency method for three-dimensional model of large-scale digital workshop based on Unity platform - Google Patents
Cross-platform consistency method for three-dimensional model of large-scale digital workshop based on Unity platform Download PDFInfo
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Abstract
The invention discloses a Unity platform-based large-scale digital workshop three-dimensional model cross-platform consistency method, which is characterized in that a file in a nwc format is exported on a Revit platform; opening an exported nwc format file and an exported fbx format file on a Navisway platform; importing the fbx file into a Unity platform, and establishing a Revit model and material ball mapping relation table and a Revit model structure information mapping relation table; the fbx file is exported on a Revit platform, and meanwhile, data is exported to a database through ODBC; importing the fbx file into a Unity platform, and establishing a Revit model data mapping relation table; replacing the Revit model according to the Revit model structure information mapping relation table; replacing the material ball according to the Revit model and the material ball mapping relation table; optimizing the hierarchical structure of the model according to the Revit model data mapping relation table, and dividing the model into the belonged elevation, family and type; and establishing a corresponding relation between the model and the data according to the unique ID of the model and the derived database. The method solves the problems of the integrity of the three-dimensional model data import and the consistency of the model data.
Description
Technical Field
The invention belongs to the technical field of three-dimensional model-based digital workshop operation and maintenance management, relates to a cross-platform consistency method for three-dimensional models of a large-scale digital workshop, and particularly relates to a cross-platform consistency method for three-dimensional models of the large-scale digital workshop based on a Unity platform.
Background
With the increasing application of the overall solution of the large-scale digital workshop to actual production, the three-dimensional model of the workshop plays different roles in the whole life cycle of design, construction, operation and scrapping of the workshop, and as professional intelligent systems are often used for supporting each stage, the three-dimensional model of the whole workshop (including production lines, equipment and environments) can be used as key data in each professional system.
The workshop construction is subject to various stages of design, construction, operation and maintenance. In the plant design stage, designers use a Revit platform to perform Building Information Modeling (BIM), and in the stage, all three-dimensional models of the whole plant are built, and the data also comprises a plurality of pieces of building information. And (4) entering the operation and maintenance stage after the construction of the factory building is finished, and supporting the operation and maintenance management of the three-dimensional model-based digital workshop by using a specific system platform. In order to solve the problem, the invention provides a method for realizing the cross-platform consistency of three-dimensional models of a large-scale digital workshop, which ensures the data communication of three-dimensional model data between a design platform (Revit platform) and a digital workshop operation and maintenance management platform (Unity platform) and keeps the data consistency.
Both the Revit platform and the Unity platform support the export and import of the model files in the FBX format, so the model files in the FBX format are selected as the cross-platform standard in the invention. According to research, two methods support FBX file export at present, but both methods have the problem of data loss. One approach is to export a file in FBX format via a plug-in on the Revit platform, but this approach would lose material sphere information of the three-dimensional model. One approach exports a nwc formatted file from the Revit platform and exports a FBX formatted file after the navis work platform opens the file, but this way loses part of the three-dimensional model. Since a large-scale data workshop comprises tens of thousands of three-dimensional models and data, the association relationship is complex, and no matter the material ball or the model is lost, cross-platform supplement is not feasible.
Disclosure of Invention
In order to solve the technical problem, the invention provides a method for cross-platform consistency of three-dimensional models of a large-scale digital workshop based on a Unity platform.
The technical scheme adopted by the invention is as follows: a method for cross-platform consistency of three-dimensional models of large-scale digital workshops based on a Unity platform comprises the following steps:
step 1: exporting a file in nwc format on a Revit platform;
step 2: opening the files in nwc format exported in the step 1 and exporting files in fbx format on a Naviscerk platform;
and step 3: importing the fbx file into a Unity platform, and establishing a Revit model and material ball mapping relation table and a Revit model structure information mapping relation table;
the Revit model and material ball mapping relation table comprises a single material mapping relation table and a multi-material mapping relation table; the single material mapping relation table takes the family name and the type name as unique identifiers and establishes a corresponding relation with the material name; the multi-material mapping relation table takes the family name and the type name as unique identifiers, but does not need to establish a material comparison relation;
the Revit model structure information mapping relation table is used for establishing a mapping relation between the Revit model and the unique key words of elevation, family and type;
and 4, step 4: the fbx file is exported on a Revit platform, and meanwhile, data is exported to a database through ODBC;
and 5: importing the fbx file into a Unity platform, and establishing a Revit model data mapping relation table;
the Revit model data mapping relation table is used for establishing a Revit model data mapping relation with a Revit model ID as a unique key word;
step 6: replacing the Revit model according to the Revit model structure information mapping relation table in the step 3;
and 7: replacing the material ball according to the Revit model and the material ball mapping relation table in the step 3;
and 8: optimizing the hierarchical structure of the model according to the Revit model data mapping relation table established in the step 5, and dividing the model into the belonged elevation, family and type; and (4) establishing a corresponding relation between the model and the data according to the unique ID of the model and the database derived in the step (4).
According to the method for cross-platform consistency of the large-scale digital workshop three-dimensional model based on the Unity platform, disclosed by the invention, cross-platform model import realized in Unity platform development can be combined with the advantages of two import modes, and the incidence relation between the model and data is automatically established, so that the completeness of the large-scale three-dimensional model data import of the digital workshop can be solved, and the model data consistency between a three-dimensional model design platform (Revit) and a digital workshop operation and maintenance management platform (Unity) can be solved.
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FIG. 1 is a flow chart of an embodiment of the present invention.
Detailed Description
In order to facilitate the understanding and implementation of the present invention for those of ordinary skill in the art, the present invention is further described in detail with reference to the accompanying drawings and examples, it is to be understood that the embodiments described herein are merely illustrative and explanatory of the present invention and are not restrictive thereof.
This embodiment will use the following terminology:
(1) digital workshop: the comprehensive application of digitalization and networking technology in production workshop integrates the information of numerical control equipment and process design system, production organization system and other management system to form integrated manufacturing system with integrated information flow automation.
(2) Three-dimensional modeling: a digitized representation of the feature information for the real three-dimensional object formed by the 3D modeling tool.
(3) Data consistency: in different 3D modeling systems, models express attributes of consistency.
(4) Revit platform: the Building Information Model (BIM) is constructed, and can help building designers to design, build and maintain buildings with better quality and higher energy efficiency. One of the most widely used software in the BIM system of the building industry in China.
(5) Naviswork platform: the software is integrated with visualization and simulation and is provided by Autodesk for the building engineering design industry, a three-dimensional model created by design software such as Revit and CAD and data and information from other software can be integrated into a whole project, and the requirements of browsing, viewing and managing are facilitated for users.
(6) Unity platform: the game development tool is a comprehensive integrated professional game engine, and is a comprehensive integrated comprehensive game development tool which enables developers to easily create multiple platforms of interactive contents such as three-dimensional games, building visualizations, real-time three-dimensional animations and the like.
Referring to fig. 1, the method for cross-platform consistency of the three-dimensional model of the large-scale digital workshop based on the Unity platform provided by the invention comprises the following steps:
step 1: exporting a file in nwc format on a Revit platform;
since the Revit platform exports the fbx file of the model, the problem of losing the material ball of the model can occur after the FBx file is imported into the Unity platform. There are tens of thousands of high-precision model data in a large-scale digital workshop, and after a material ball is lost, if the mapping relation between the model and the material ball is found again in the Unity platform, the mapping relation is infeasible. If the model and the material ball mapping relation is re-associated in 3dmax, the workload is large and is not feasible. Research has found that the Reivt platform provides a way to export a model with material balls, i.e., files in the nwc format are exported from the Reitt platform.
Step 2: opening the files in nwc format exported in the step 1 and exporting files in fbx format on a Naviscerk platform;
after opening the file in the Navisworth platform, format. nwc, the.fbx file of the model is derived. When the material balls are imported into the Unity platform, the material balls are not lost. Meanwhile, structural information of the Revit model is completely exported, and the structural information of the Revit model comprises elevation, family and type.
And step 3: importing the fbx file into a Unity platform, and establishing a Revit model and material ball mapping relation table and a Revit model structure information mapping relation table;
the Revit model and material sphere mapping relationship table of the embodiment includes a single material mapping relationship table and a multi-material mapping relationship table; the two tables are applied differently, and the single material mapping relation table only needs to realize material replacement according to the contrast relation in application. But the multi-material mapping relation table needs to realize the replacement of the model according to the contrast relation in the application.
In the single material mapping relationship table of this embodiment, the family name and the type name are used as unique identifiers to establish a corresponding relationship with the material name; for example, the family name is a basic wall, the type name is NQ-100m, the name of the material ball is a wall column, namely, the basic wall and the NQ-100 are unique identifiers, and the corresponding relation with the material ball of the wall column is established.
In the multi-material mapping relation table of the embodiment, the family name and the type name are used as unique identifiers, but the comparison relation with the material is not required to be established; for example, the family name is an audible and visual alarm, the type name is an audible and visual alarm, namely, the audible and visual alarm and the audible and visual alarm are unique identifiers, and the multi-material model is determined.
The Revit platform has two ways to query the model. One is by a model unique ID query, which can quickly locate the position of the model in the 3D view. The other is to inquire the position of the same type model in the 3D view through the family and the type three attributes. Based on the data mapping relationship of the Revit platform, two model structure information mapping relationship tables need to be established in the Unity platform, one is the mapping relationship between the model and the unique key word by taking elevation, family and type, and when the FBX file is imported in the step (3), the plug-in automatically establishes a contrast relationship and stores the contrast relationship in a database. One is a mapping relation between the model ID as a unique key and the model, and when the FBX file is imported in step (5), the plug-in automatically establishes a contrast relation and stores the contrast relation in a database.
Although the method can find the mapping relation between the model and the material ball and the structural information of the model, the problem of model loss exists in the application process. Considering that the number of digital plant models is large, it is not feasible to fill up the lost model in Unity or 3d max, and the model designed by the building designer in Revit includes data of building profession, which are lost if the model is designed by Unity or 3d max. Research has found that the Revit platform plugin provides a method for exporting model FBX files, i.e. files in FBX format exported from the Revit platform. And establishing a mapping relation between the model and the material ball, and establishing a mapping relation between model structure information.
In the Revit model structure information mapping relation table of the embodiment, a mapping relation between the unique keywords of elevation, family and type and the Revit model is established; for example, +5.1 is the building elevation, the wall is the database table name, the base wall is the family, NQ-100m is the type, and the mapping relationship is established with the model base wall 77.
And 4, step 4: the fbx file is exported on a Revit platform, and meanwhile, data is exported to a database through ODBC;
in the embodiment, the mapping relationship between the Revit model ID and the building related attribute data is found through the derived database table, as shown in the following figure. For example, the derived data sheet wherein the wall and wall type sheets contain all the building related attribute data for the wall model. The table of the wall contains the model ID, type, creation stage and building related attributes of volume, area, length, etc.
And 5: importing the fbx file into a Unity platform, and establishing a Revit model data mapping relation table;
and exporting the model fbx file through a Revit platform, and importing the model fbx file into a Unity platform, so that the problem of model loss does not exist. The derived model name contains family, type, model ID data. The corresponding relation between the model and the data in the database can be established according to the name of the model. The basic data of the model, such as the length, width, height, radius, material, model, maintenance cycle, qualification certificate, manufacturer and other information, recorded by the data building designer in the design and construction process. The information is necessary data for realizing the management of the design, construction, operation and maintenance, and scrapped full life cycle, and the operation and maintenance system of the Revit system and the digital workshop needs to be synchronized. The system can dynamically bind data according to the unique ID of the model, and if data updating occurs in any system of a Revit system or a digital workshop operation and maintenance system, the data synchronization of the two systems can be realized, and the latest data bound by the model can be realized.
In the Revit model data mapping relation table of the embodiment, a data mapping relation between a Revit model ID as a unique keyword and a Revit model is established; the imported model in the embodiment has a model unique ID, which is to establish an association relationship between the model and data. For example: the model is a wall base NQ-200mm [8683740] where wall base represents family, NQ-200mm represents type, 8683740 is model ID. Through the Revit model structure information mapping relation table in the step 3, the fact that the family is a basic wall can be inquired, the type is NQ-200mm, the name of the corresponding database table is a wall, and the model ID 8683740 is used for searching the building data related to the model in the wall table of the database; the Revit model and data mapping relation is established in the mode.
Step 6: replacing the Revit model according to the Revit model structure information mapping relation table in the step 3;
and 7: replacing the material ball according to the Revit model and the material ball mapping relation table in the step 3;
and 8: optimizing the hierarchical structure of the model according to the Revit model data mapping relation table established in the step 5, and dividing the model into the belonged elevation, family and type; and (4) establishing a corresponding relation between the model and the data according to the unique ID of the model and the database derived in the step (4).
The method of the embodiment can be made into a Unity plug-in to automatically generate the model.
1. And (3) the models in the same family and type in the Revit platform are the same, and a model object relationship is established according to the Revit model structure information mapping relation table in the step 3 and by combining the characteristics of the Prefab object in the Unity platform. And establishing a corresponding relation with the Unity platform Prefab object by taking the family and the type as the unique key words. After the model is imported, the Unity plug-in can automatically create a Prefab object according to the family and the class to which the model belongs, establish a mapping relation and store the mapping relation in the database.
2. And (4) according to the Revit model and material ball mapping relation table in the step (3). The Unity plugin can automatically derive two model and material ball mapping relation tables, one is a single material mapping relation table, and the other is a multi-material mapping relation table. The two tables are applied differently, and the single material mapping relation table only needs to realize material replacement according to the contrast relation in application. But the multi-material mapping relation table needs to realize the replacement of the model according to the contrast relation in the application.
3. The model material ball derived according to the step 4 is lost, and the mesh of the multi-material model is merged. Because the mesh is merged, when the model is required to be mapped, modeling needs to be carried out again in max, and after the mesh is segmented, the workload is huge. The research finds that by means of the two derived models, as the specifications of the computing coordinate systems of different three-dimensional platforms are different, Revit is the forward model derived according to the Z axis, Navisway is the upward model derived according to the Z axis, the Rotation of the models differs by 90 degrees, but the scaling is consistent. The system develops the Unity plug-in which can automatically analyze the model to be replaced, obtains the position.xyz, the rotation.xyz and the scale.xyz of the model, finds the corresponding Prefab according to the name of the model, and automatically replaces the model according to the model structure information mapping relation table after instantiating the object by the position.xyz, (rotation.x, rotation.y-90, rotation.z) and scale.xyz attributes. After the initialization work of all models of the digital workshop is finished, the development Unity plug-in of the system can automatically replace the material balls of all models according to the mapping relation table of the models and the material balls.
4. The development Unity plug-in of the system can optimize the hierarchical structure of the model according to the name of the model and divide the model into the belonged elevation, the family and the type. And establishing a corresponding relation between the model and the data according to the unique ID of the model.
It should be understood that the above description of the preferred embodiments is given for clarity and not for any purpose of limitation, and that various changes, substitutions and alterations can be made herein without departing from the spirit and scope of the invention as defined by the appended claims.
Claims (1)
1. A method for cross-platform consistency of three-dimensional models of large-scale digital workshops based on a Unity platform is characterized by comprising the following steps:
step 1: exporting a file in nwc format on a Revit platform;
step 2: opening the files in nwc format exported in the step 1 and exporting files in fbx format on a Naviscerk platform;
and step 3: importing the fbx file into a Unity platform, and establishing a Revit model and material ball mapping relation table and a Revit model structure information mapping relation table;
the Revit model and material ball mapping relation table comprises a single material mapping relation table and a multi-material mapping relation table; the single material mapping relation table takes the family name and the type name as unique identifiers and establishes a corresponding relation with the material name; the multi-material mapping relation table takes the family name and the type name as unique identifiers, but does not need to establish a material comparison relation;
the Revit model structure information mapping relation table is used for establishing a mapping relation between the Revit model and the unique key words of elevation, family and type;
and 4, step 4: the fbx file is exported on a Revit platform, and meanwhile, data is exported to a database through ODBC;
and 5: importing the fbx file into a Unity platform, and establishing a Revit model data mapping relation table;
the Revit model data mapping relation table is used for establishing a Revit model data mapping relation with a Revit model ID as a unique key word;
step 6: replacing the Revit model according to the Revit model structure information mapping relation table in the step 3;
and 7: replacing the material ball according to the Revit model and the material ball mapping relation table in the step 3;
and 8: optimizing the hierarchical structure of the model according to the Revit model data mapping relation table established in the step 5, and dividing the model into the belonged elevation, family and type; and (4) establishing a corresponding relation between the model and the data according to the unique ID of the model and the database derived in the step (4).
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