CN117456125A - Automatic conversion method from building 3ds Max geometric model to Revit information model - Google Patents

Abstract

The invention provides an automatic conversion method from a building 3ds Max geometric model to a Revit information model, which is based on a 3ds Max and Revit software platform, utilizes the secondary development of Maxscript and Revit API, and provides an automatic conversion method from the building 3ds Max geometric model to the Revit information model through algorithms of component type identification, component parameter classification, geometric information extraction and parameter automatic modeling so as to realize the automatic conversion from a three-dimensional geometric model to an information management model, reduce repeated modeling work of the same building under different function applications, perfect the effective conversion method between two types of models in the current building industry and lay a foundation for the universality and expandability of the building three-dimensional model.

Description

Automatic conversion method from architectural 3ds Max geometric model to Revit information model

Technical field

The invention relates to an automatic conversion method from an architectural 3ds Max geometric model to a Revit information model.

Background technique

The three-dimensional architectural model is the model base for realizing the digital twin of the building. On this basis, combined with the application of digital information technology, the virtual and real combination of the model and the entity is achieved. The model base is the core and foundation of the digital twin.

At present, there are two main types of construction methods for building 3D models:

One type is usually based on digital surveying and mapping data, and uses the excellent 3D data processing, polygon editing and modeling, and scene animation special effects expansion functions of 3D geometric modeling software represented by 3ds Max and SketchUp to create models of the building body, environment, and scenes. Construction, the advantage lies in the construction of complex objects and the expansion of display effects;

The other type is usually based on design drawings, through architectural parametric modeling software represented by Revit, according to the axis network, elevation, dimensions and other annotations in the drawings, and based on flexibly expandable parametric component families to easily carry out components. Modeling, and supports information integration and object management based on components as units. The advantage lies in efficient model construction and unit management, and supports subsequent BIM application expansion based on IFC standards.

It can be seen from the above analysis that the core difference between the two types of model construction methods lies in the source of modeling data and the focus of subsequent applications. They have corresponding value in a wide range of application scenarios of building digital twins. If the two types of models can be improved, Efficient conversion methods between models will avoid duplicating the modeling workload in different software.

Taking the most typical software of the two types of model building methods as an example, 3ds Max supports the direct import of rvt format files created by Revit or the indirect import of fbx format files as a medium. After import, subsequent processing and application can be carried out in 3ds Max; and Although Revit also supports the import of fbx format files and can indirectly import files created by 3ds Max, the model is imported in the form of a reference block and does not support subsequent information integration, object management and BIM applications based on components. The core advantage of Revit form files is lost, so it is not actually possible to achieve effective conversion from 3ds Max models to Revit models.

Contents of the invention

The purpose of the present invention is to provide an automatic conversion method from an architectural 3ds Max geometric model to a Revit information model.

In order to solve the above problems, the present invention provides an automatic conversion method from an architectural 3ds Max geometric model to a Revit information model, including:

An automatic conversion method from an architectural 3ds Max geometric model to a Revit information model, which is characterized by including:

Based on the data characteristics of different geometries in the architectural 3ds Max geometric model, component type identification is performed;

Obtain the geometric parameter values of each component type, and convert the geometric parameter values of the same type of components with errors within the preset prefabricated range into the unified geometric parameter values corresponding to the component type;

Based on the unified geometric parameter values corresponding to each type of component, the geometric information of each type of component is obtained;

Export the geometric information of each type of component to a text file, and call the corresponding creation statement based on the geometric information in the Revit API to automatically reconstruct the building components.

Further, in the above method, the component types include: main structural components created based on standard primitives, common family library components based on splicing and modification of standard primitives, and other special objects.

Further, in the above method, component type identification is performed based on the data characteristics of different geometries in the architectural 3ds Max geometric model, including:

The structural types of the main structural components include: beams, columns, walls and plates. The component types of the main structural components are determined by judging the geometry type and geometric size.

Further, in the above method, component type identification is performed based on the data characteristics of different geometries in the architectural 3ds Max geometric model, including:

The component types of the common family library components include: doors and windows, roofs, tables and chairs, and the component types of the common family library components are identified by the names of objects.

Further, in the above method, component type identification is performed based on the data characteristics of different geometries in the architectural 3ds Max geometric model, including:

The other special objects include: decorative components, and other special objects are classified into component types through manual selection.

Further, in the above method, the geometric parameter values of each component type are obtained, and the geometric parameter values of the same type of components whose errors are within the preset prefabrication range are converted into unified geometric parameter values corresponding to the component type, including:

Convert the geometric parameter values of the same type of components with an error error not exceeding 5% into the unified geometric parameter values corresponding to the type of component.

Further, in the above method, the geometric information of each type of component is obtained based on the unified geometric parameter values corresponding to each type of component, including:

Based on the unified geometric parameter values corresponding to the main structural components, the corresponding geometric information is extracted by analyzing the coordinate data of the components in 3dsMax according to the definition of the datum primitive.

Further, in the above method, the geometric information of each type of component is obtained based on the unified geometric parameter values corresponding to each type of component, including:

Based on the unified geometric parameter values corresponding to the main structural components, the corresponding geometric information is extracted by analyzing the coordinate data and size data of the standard primitive objects in 3ds Max according to the data required for the creation of the corresponding components in RevitAPI.

Further, in the above method, the geometric information of each type of component is obtained based on the unified geometric parameter values corresponding to each type of component, including:

Based on the unified geometric parameter values corresponding to common family library components, the corresponding geometric information is extracted by analyzing the coordinate data and size data of the object in 3ds Max based on the data required to create the corresponding component in RevitAPI.

Further, in the above method, the storage method of wall information in the text file is: the first line is the total number of walls, and each line starting from the second line is 9 data required to create a wall;

Export the geometric information of each type of component to a text file, and call the corresponding creation statement based on the geometric information in the Revit API to automatically reconstruct the building components, including:

Read the data content of the first line of the text file, convert the data content of the first line into int type and store it as the total number of walls;

Define a two-dimensional array with the total number of behavioral walls listed as 9, used to store the creation data of all walls, where the first dimension represents the wall serial number, and the second dimension represents the related creation information serial number of the specified wall;

By reading the text file line by line and separating the data with commas, all data can be extracted and stored in the corresponding position of the two-dimensional array. Finally, the wall model can be constructed by calling the wall creation statement based on the obtained information.

Compared with the prior art, the beneficial effects of the present invention are as follows:

(1) The automatic conversion method from the architectural 3ds Max geometric model to the Revit information model provided by the present invention is based on the secondary development of Maxscript and Revit API, through component type identification, component parameter classification, geometric information extraction, and automatic parameter modeling. The algorithm realizes the automatic transformation of the three-dimensional geometric model into the information management model, reducing the repetitive modeling work of the same building under different functional applications;

(2) The present invention provides an automatic conversion method from a geometric model to an information model, which is usually based on reverse modeling. Subsequent models can support component-based information integration, object management and BIM application expansion, improving the model's use in the entire life cycle of the building. Practical application value in management;

(3) As an exploration of data transmission between files in different formats, this invention improves the effective conversion method between two types of models in the current construction industry, conforms to the development trend of architectural digitalization, and lays a solid foundation for the versatility and scalability of three-dimensional architectural models. Base.

Description of the drawings

Figure 1 is a flow chart of an automatic conversion method from an architectural 3ds Max geometric model to a Revit information model according to an embodiment of the present invention;

Figure 2 is a flow chart of a component parameter classification algorithm according to an embodiment of the present invention;

Figure 3 is a flow chart of an elevation geometric information extraction algorithm according to an embodiment of the present invention;

Figure 4 is a flow chart of a wall geometric information extraction algorithm according to an embodiment of the present invention;

Figure 5 is a flow chart of the wall window geometric information extraction algorithm according to an embodiment of the present invention;

Figure 6 is a flow chart of a wall information transmission algorithm according to an embodiment of the present invention.

Detailed ways

In order to make the above objects, features and advantages of the present invention more obvious and understandable, the present invention will be described in further detail below with reference to the accompanying drawings and specific embodiments.

As shown in Figure 1, the present invention provides an automatic conversion method from an architectural 3ds Max geometric model to a Revit information model, including:

Step S1, identify component types based on the data characteristics of different geometries in the architectural 3ds Max geometric model;

Step S2: Obtain the geometric parameter values of each component type, and convert the geometric parameter values of the same type of components whose errors are within the preset prefabricated range into the unified geometric parameter values corresponding to the component type;

Step S3: Obtain the geometric information of each type of component based on the unified geometric parameter values corresponding to each type of component;

Step S4: Export the geometric information of each type of component to a text file, and call the corresponding creation statement based on the geometric information in the Revit API to automatically reconstruct the building components.

Here, MAXScript language is the scripting language that comes with 3ds Max, which can access and modify the internal data in the 3ds Max software, and interact with text files. The present invention uses the MAXScript language as a tool and text files as a medium to realize the three major functions of component type identification, component parameter classification and geometric information extraction in the 3ds Max model.

Revit API is a secondary development tool suitable for Revit software. It provides a large number of methods for creating and modifying family documents. It can realize the interaction and management of family types and Revit documents, and read, create and modify data in Revit software. The present invention uses Revit API as a tool and text files as a medium to realize the automatic modeling function of Revit parameters.

In order to solve the problem of effective conversion between model files, the present invention proposes an automatic conversion method from an architectural 3ds Max geometric model to a Revit information model. The core is to transfer effective data between model files. The main components include: components Type identification, component geometric parameter classification, geometric information extraction and parameter automatic modeling. The overall technical architecture of the present invention is shown in Figure 1.

This invention aims at the above-mentioned problem that the three-dimensional geometric model of the building cannot be effectively converted into an information management model. Based on the 3ds Max and Revit software platforms, using the secondary development of Maxscript and Revit API, through component type identification, component parameter classification, geometry Algorithms for information extraction and parameter automated modeling propose an automatic conversion method from architectural 3ds Max geometric models to Revit information models to achieve automatic conversion of 3D geometric models to information management models and reduce the number of errors in the same building under different functional applications. Repeated modeling work has improved the effective conversion method between the two types of models in the current construction industry, laying the foundation for the versatility and scalability of the three-dimensional architectural model.

Relying on the good format versatility of 3ds Max in three-dimensional geometric modeling software, the present invention can support common geometric model formats such as 3ds, skp, fbx, obj, etc., and improves the effective conversion method between the two types of models in the current construction industry. Lay the foundation for the versatility and scalability of architectural 3D models.

In one embodiment of the automatic conversion method from an architectural 3ds Max geometric model to a Revit information model of the present invention, the component types include: main structural components created based on standard primitives, common family library components based on splicing and modification of standard primitives and other special items.

Here, different types of components of the building are superpositions of different types of geometry in the 3ds Max software, and there is no type information. In order to adapt to the requirements of object classification modeling in the Revit software, component types must first be determined based on the data characteristics of different geometries. identification. Depending on how they are created in 3ds Max software, architectural components can be divided into main structural components created based on standard primitives, common family library components based on splicing and modification of standard primitives, and other special objects. The intelligence of components can be achieved in different ways. Identify.

In one embodiment of the automatic conversion method from the architectural 3ds Max geometric model to the Revit information model of the present invention, step S1 is to perform component type identification based on the data characteristics of different geometries in the architectural 3ds Max geometric model, including:

The structural types of the main structural components include: beams, columns, walls and plates. The component types of the main structural components are determined by judging the geometry type and geometric size.

Here, the main structural components of the building include beams, columns, walls, slabs, etc., which basically present regular geometric shapes. They are all created using standard geometry during the modeling process of 3ds Max software, such as circular columns or circular beams. Create using cylinders, square columns, walls, slabs or rectangular beams using cuboids. Moreover, such structural components have obvious characteristics in terms of geometric size, and the component type can be determined by judging the geometry type and geometric size.

For example, the wall object in the 3ds Max software has the following characteristics: the creation type of the wall belongs to the rectangular parallelepiped type, its width is generally less than 300mm, and its height is greater than 1000mm. Considering that the length and width values may be reversed in the 3ds Max software, the length of the object is The smaller value of sum and width is defined as the width of the wall. The MAXScript code is as follows:

wall=for iin objects collect--traverse all objects in the scene

if classof i＝＝box and amin i.length i.width<300*0.0393701andi.height>1000*0.0393701

--If the data type of the object is Box and the width of the object is less than 300mm and the height is greater than 1000mm (unit conversion from meters to inches is required), collect the objects into the wall array and define it as a wall;

then i

else DontCollect--don't collect if not satisfied

Therefore, this method can be used for component identification for other structural components with the same characteristics in the architectural 3ds Max model. All that needs to be changed is the array name, the geometry type and the geometric size in the judgment statement.

In one embodiment of the automatic conversion method from the architectural 3ds Max geometric model to the Revit information model of the present invention, step S1 is to perform component type identification based on the data characteristics of different geometries in the architectural 3ds Max geometric model, including:

The component types of the common family library components include: doors and windows, roofs, tables and chairs, and the component types of the common family library components are identified by the names of objects.

Here, the building also contains common family library components (usually there are preset family libraries of corresponding types of components in Revit), such as various forms of doors, windows, roofs, tables and chairs, etc. The shape of such parts is relatively complex, and the model attributes and data characteristics are different. It is inconvenient to judge by simple geometry type and size. It can be identified by the name of the object. The following MAXScript code indicates that it traverses all objects, identifies objects with "door" and "window" in their names in the scene and puts them into the corresponding arrays to realize the identification of common family library components:

Gate=$*Gate*as array;

window = $*window*as array.

In one embodiment of the automatic conversion method from the architectural 3ds Max geometric model to the Revit information model of the present invention, step S1 is to perform component type identification based on the data characteristics of different geometries in the architectural 3ds Max geometric model, including:

The other special objects include: decorative components, and other special objects are classified into component types through manual selection.

Here, there are a wide variety of building components, and there may be objects other than the preset family library types of components. Such objects generally have complex geometric shapes, unknown data types and attributes, and are difficult to identify through computer intelligence. They usually need to be consistent with the actual objects and can be manually selected for classification. Taking "decorative components" as an example, the following MAXScript code indicates that the decorative components are manually selected and placed in the corresponding array. $ represents all currently selected objects:

Decorative widgets = $as array.

In one embodiment of the automatic conversion method from the architectural 3ds Max geometric model to the Revit information model of the present invention, step S2 obtains the geometric parameter values of each component type, and converts the geometric parameter values of the same type of components with errors within the preset prefabricated range into The unified geometric parameter values corresponding to this type of component include:

Convert the geometric parameter values of the same type of components with an error error not exceeding 5% into the unified geometric parameter values corresponding to the type of component.

Here, for different components with the same design geometric parameter values, due to possible construction errors, measurement errors or modeling errors, the geometric size data will be discrete. The components that originally had the same parameter values will show very small differences but different numerical values. Size parameters. This not only does not meet the application requirements of the model, but also brings trouble to the creation of the model. Therefore, the data needs to be modularized and classified. By consulting relevant standard information, set geometric parameter values with an error of no more than 5%. Classified as a unified module, the definition of the allowable deviation of 5% can also be revised based on the results of the actual modularization operation.

For a certain geometric parameter value type, by traversing the data in the geometric parameter value array, classify the data with a deviation of less than 5% into one category, average the same type of data and then round, and replace the resulting integer as the type design value. The original discrete data is used as the basis for modeling, and the flow chart is shown in Figure 2.

In one embodiment of the automatic conversion method from the architectural 3ds Max geometric model to the Revit information model of the present invention, step S3 is to obtain the geometric information of each type of component based on the unified geometric parameter values corresponding to each type of component, including:

Based on the unified geometric parameter values corresponding to the main structural components, the corresponding geometric information is extracted by analyzing the coordinate data of the components in 3dsMax according to the definition of the datum primitive.

Here, geometric information is extracted separately for the identified component types. Other special objects that are supplementary defined cannot be constructed parametrically through the existing family library in Revit, so there is no need to extract geometric information. In addition, component positioning in Revit software is based on basic elements such as elevation and axis network, and information extraction of relevant datum elements needs to be supplemented.

According to the definition of the datum primitive, relevant geometric information is extracted by analyzing the coordinate data of the component in 3ds Max. The information extraction algorithm of the datum primitive is analyzed using elevation as an example. The same applies to other datum primitives. The elevation is a limited horizontal plane in Revit, which serves as a reference for the "elevation hosting" elements (including the main components of the building in Revit). The most important attribute is the elevation value, which is used to determine the relative elevation of the elevation. It can be traversed through the main The Z coordinates of structural components beams, columns, slabs, and walls are filtered out to filter out non-repeating values to form an array of elevation values. The algorithm flow chart is shown in Figure 3, including:

Step S311, traverse the Z coordinates of beams, columns, plates and walls respectively and add them to the elevation array;

Step S312, filter out the geometric parameter values that are not repeated in the elevation array and sort them;

Step S3313, output the elevation array number and output the geometric parameter value text file in sequence.

In one embodiment of the automatic conversion method from the architectural 3ds Max geometric model to the Revit information model of the present invention, step S3 is to obtain the geometric information of each type of component based on the unified geometric parameter values corresponding to each type of component, including:

Based on the unified geometric parameter values corresponding to the main structural components, the corresponding geometric information is extracted by analyzing the coordinate data and size data of the standard primitive objects in 3ds Max according to the data required for the creation of the corresponding components in RevitAPI.

Here, based on the data required to create corresponding components in RevitAPI, the corresponding geometric information is extracted by analyzing the coordinate data and size data of standard primitive objects in 3ds Max. The wall is used as an example to analyze the information extraction algorithm of standard primitive objects. Others The same goes for standard primitive objects. Through the analysis of the statements in the Revit API for creating components based on model lines for the wall class, for each cuboid that is recognized as a wall in 3ds Max, it is necessary to extract the coordinates of the midpoint of the two short sides of the bottom surface of the cuboid (a total of 6 values), the cuboid There are a total of 9 data including the width and height values and the elevation number corresponding to the Z coordinate of the cuboid position.

Calling the cuboid attribute parameters can only extract the length, width, and height of the cuboid and the coordinates of the origin of the local coordinate system. However, it is still relatively cumbersome to calculate the midpoint coordinates of the two short sides of the bottom of the cuboid based only on these data. If the cuboid is converted into an editable grid composed of points, lines, and faces, the position coordinates of the vertices can be called. Not only can the midpoint coordinates of the short sides be calculated, but the width and height data of the cuboid can also be calculated through the distance between the vertices. , the Z coordinate of the cuboid position can also be extracted through the vertex position coordinates to solve the problem of extracting 9 data of the cuboid. The algorithm flow chart is shown in Figure 4, including:

Step S321, traverse the wall and store the geometric parameter value of the wall height into the wall height array;

Step S322, convert all walls into editable grids;

Step S323, traverse the wall to determine the elevation number corresponding to the Z coordinate;

Step S324, compare the distance to determine the vertex number corresponding to the short side;

Step S325, store the midpoint coordinates of the two short sides into the model line array;

Step S326, store the wall thickness data into the wall thickness array;

Step S327: Traverse the wall and output the geometric data to a text file.

In one embodiment of the automatic conversion method from the architectural 3ds Max geometric model to the Revit information model of the present invention, step S3 is to obtain the geometric information of each type of component based on the unified geometric parameter values corresponding to each type of component, including:

Based on the unified geometric parameter values corresponding to common family library components, the corresponding geometric information is extracted by analyzing the coordinate data and size data of the object in 3ds Max based on the data required to create the corresponding component in RevitAPI.

Here, based on the data required to create the corresponding component in RevitAPI, the corresponding geometric information is extracted by analyzing the coordinate data and size data of the object in 3ds Max. Taking the window on the wall as an example, the information extraction algorithm of common family library component objects is analyzed. Other families The same applies to library component objects. Through analysis of host-based instance creation statements such as wall windows in RevitAPI, each object defined as a window in 3ds Max needs to extract its position coordinates (a total of 3 values), the length, width and height of the form, There are a total of 8 data including the number corresponding to the host wall to which the window belongs and the elevation number corresponding to the host wall.

When it comes to information extraction of complex geometric objects, it can be converted into an editable grid composed of points, lines, and surfaces, and the coordinates of the vertices are called to solve the problem of geometric data extraction. The algorithm flow chart is shown in Figure 5, including:

Step S331, convert all wall windows into editable grids;

Step S332, obtain the X, Y and Z direction range of the object as the length, width and height;

Step S333, obtain the wall number corresponding to the host wall;

Step S334, obtain the location coordinates of the host wall;

Step S335: Traverse the windows on the wall and output geometric information to a text file.

In one embodiment of the automatic conversion method from the architectural 3ds Max geometric model to the Revit information model of the present invention, the storage method of the wall information in the text file is: the first row is the total number of walls, and each row starting from the second row is one wall. 9 data required for body creation;

Step S4: Export the geometric information of each type of component to a text file, and call the corresponding creation statement based on the geometric information in the Revit API to automatically reconstruct the building components, including:

Read the data content of the first line of the text file, convert the data content of the first line into int type and store it as the total number of walls;

Define a two-dimensional array with the total number of behavioral walls listed as 9, used to store the creation data of all walls, where the first dimension represents the wall serial number, and the second dimension represents the related creation information serial number of the specified wall;

By reading the text file line by line and separating the data with commas, all data can be extracted and stored in the corresponding position of the two-dimensional array. Finally, the wall model can be constructed by calling the wall creation statement based on the obtained information.

Here, through the geometric information extraction algorithm in the third step, the geometric information of most components in 3ds Max can be exported to text files. You only need to call the corresponding creation statement based on the geometric information in the Revit API to realize the construction of building components. Automated refactoring. This section takes the creation of a wall as an example and mainly introduces the method of using C# language to read text files, extract corresponding information and create a wall model. The same applies to other components.

The storage method of wall information in the text file is: the first line is the total number of walls, and each line starting from the second line is the 9 data required to create a wall. The C# language can be used to read the data content of a text file line by line and separate it with commas. Therefore, first read the data content of the first line of the text file, convert the data content of the first line into int type and store it as the total number of walls; then define a two-dimensional array with the total number of walls listed as 9 to store all walls. The creation data of the wall, where the first dimension represents the wall serial number, and the second dimension represents the related creation information serial number of the specified wall; by reading the text file line by line and separating the data with commas, all data can be extracted and stored in to the corresponding position in the two-dimensional array, and finally call the wall creation statement based on the obtained information to complete the construction of the wall model. The algorithm flow chart is shown in Figure 6, including:

Step S41, open the text file that stores the wall geometric information;

Step S42, read the text file and store the data as a two-dimensional array;

Step S43, create a wall model line based on the two point coordinates;

Step S43, filter wall types according to wall thickness data;

Step S45, obtain the elevation ID based on the elevation number corresponding to the premise;

Step S46: Call the wall creation statement according to the obtained information;

Step S47, store the wall ID value into the specified array.

Compared with the prior art, the beneficial effects of the present invention are as follows:

(1) The automatic conversion method from the architectural 3ds Max geometric model to the Revit information model provided by the present invention is based on the secondary development of Maxscript and Revit API, through component type identification, component parameter classification, geometric information extraction, and automatic parameter modeling. The algorithm realizes the automatic transformation of the three-dimensional geometric model into the information management model, reducing the repetitive modeling work of the same building under different functional applications;

(2) The present invention provides an automatic conversion method from a geometric model to an information model, which is usually based on reverse modeling. Subsequent models can support component-based information integration, object management and BIM application expansion, improving the model's use in the entire life cycle of the building. Practical application value in management;

(3) As an exploration of data transmission between files in different formats, this invention improves the effective conversion method between two types of models in the current construction industry, conforms to the development trend of architectural digitalization, and lays a solid foundation for the versatility and scalability of three-dimensional architectural models. Base.

Each embodiment in this specification is described in a progressive manner. Each embodiment focuses on its differences from other embodiments. The same and similar parts between the various embodiments can be referred to each other.

Those skilled in the art may further realize that the units and algorithm steps of each example described in connection with the embodiments disclosed herein can be implemented by electronic hardware, computer software, or a combination of both. In order to clearly illustrate the possible functions of hardware and software, Interchangeability, in the above description, the composition and steps of each example have been generally described according to functions. Whether these functions are performed in hardware or software depends on the specific application and design constraints of the technical solution. Skilled artisans may implement the described functionality using different methods for each specific application, but such implementations should not be considered to be beyond the scope of the present invention.

Obviously, those skilled in the art can make various changes and modifications to the invention without departing from the spirit and scope of the invention. In this way, if these modifications and variations of the present invention fall within the scope of the claims of the present invention and equivalent technologies, the present invention is also intended to include these modifications and variations.

Claims (10)

1. A method for automatically converting a building 3ds Max geometric model to a Revit information model, comprising:

based on the data characteristics of different geometric bodies in the building 3ds Max geometric model, carrying out component type identification;

obtaining geometric parameter values of each component type, and converting the geometric parameter values of the same type of components with errors in a preset prefabrication range into uniform geometric parameter values corresponding to the type of components;

acquiring geometric information of each type of component based on the unified geometric parameter value corresponding to each type of component;

and exporting the geometric information of each type of component into a text file, and calling a corresponding creation sentence in a Revit API according to the geometric information to automatically reconstruct the building component.

2. The method for automatic conversion of building 3ds Max geometric model to Revit information model according to claim 1, wherein said component types comprise: major structural members created based on standard basis, common family library members spliced and modified based on standard basis, and other special objects.

3. The method for automatic conversion of building 3ds Max geometric model to Revit information model according to claim 2, wherein the component type recognition based on the data features of different geometric bodies in the building 3ds Max geometric model comprises:

the main structural members are of the structural type comprising: beams, columns, walls and panels, the type of component of the primary structural component is determined by the judgment of the type of geometry and the size of the geometry.

4. The method for automatic conversion of building 3ds Max geometric model to Revit information model according to claim 2, wherein the component type recognition based on the data features of different geometric bodies in the building 3ds Max geometric model comprises:

the common family library components include: doors and windows, roofs and tables and chairs, the component types of the common family library components are identified by the names of the objects.

5. The method for automatic conversion of building 3ds Max geometric model to Revit information model according to claim 2, wherein the component type recognition based on the data features of different geometric bodies in the building 3ds Max geometric model comprises:

the other special objects include: the decoration component classifies the component types of other special objects through manual selection.

6. The automatic conversion method from a building 3ds Max geometric model to a Revit information model according to claim 1, wherein obtaining geometric parameter values of each component type, converting geometric parameter values of the same type of component having an error within a preset prefabrication range into uniform geometric parameter values corresponding to the same type of component, comprises:

and converting the geometric parameter values of the components of the same type with the error of not more than 5% into uniform geometric parameter values corresponding to the components of the same type.

7. The method for automatically converting a building 3ds Max geometric model to a Revit information model according to claim 2, wherein obtaining geometric information of each type of component based on the unified geometric parameter values corresponding to each type of component comprises:

based on the unified geometric parameter values corresponding to the main structural members, corresponding geometric information is extracted by analyzing coordinate data of the members in 3ds Max according to definition of the reference primitives.

8. The method for automatically converting a building 3ds Max geometric model to a Revit information model according to claim 2, wherein obtaining geometric information of each type of component based on the unified geometric parameter values corresponding to each type of component comprises:

based on the unified geometric parameter values corresponding to the main structural components, corresponding geometric information is extracted by analyzing coordinate data and size data of standard basic body objects in 3ds Max according to data required for creating corresponding components in the RevitAPI.

9. The method for automatically converting a building 3ds Max geometric model to a Revit information model according to claim 2, wherein obtaining geometric information of each type of component based on the unified geometric parameter values corresponding to each type of component comprises:

based on the unified geometric parameter values corresponding to the common family library components, corresponding geometric information is extracted by analyzing coordinate data and size data of objects in 3ds Max according to data required for creating corresponding components in the RevitAPI.

10. The method for automatically converting a building 3ds Max geometric model to a Revit information model according to claim 1, wherein the wall information in the text file is stored in the following manner: the first row represents the total number of walls, and the second row starts to create 9 pieces of data needed for each wall;

exporting the geometric information of each type of component into a text file, calling a corresponding creation sentence according to the geometric information in a Revit API to automatically reconstruct the building component, wherein the method comprises the following steps:

reading the first line data content of the text file, converting the first line data content into the int type, and storing the int type as the total number of the wall bodies;

defining a two-dimensional array with a behavior wall total number column of 9, and storing the creation data of all the walls, wherein the first dimension represents the serial number of the wall, and the second dimension represents the related creation information serial number of the specified wall;

the text file is read line by line, the comma is used for separating data, extraction of all data can be achieved, the data are stored in corresponding positions of the two-dimensional array, and finally, the wall body creation statement is called according to the acquired information, so that the construction of the wall body model can be completed.