CN108597032B - Method and system for importing building information model into Unity3D for display - Google Patents
Method and system for importing building information model into Unity3D for display Download PDFInfo
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Abstract
The invention discloses a method and a system for importing a building information model into Unity3D for display, wherein the method comprises the following steps: firstly, obtaining a building information model; secondly, extracting and converting the building information model to obtain a model conversion file; then analyzing the model conversion file to obtain a model data structure corresponding to Unity 3D; and finally, the model data structure is imported into Unity3D for display, the import time is reduced from the original 1 to 3 hours to 1 to 5 minutes, and the import speed is improved.
Description
Technical Field
The invention relates to the technical field of building information model display, in particular to a method and a system for importing a building information model into Unity3D for display.
Background
With the development of the building industry, the demand of displaying building information models at a mobile end and a Web end on the market is more and more obvious. Revit software is a common tool for building model modeling, and Unity3D is a popular domestic model display engine supporting cross-platforms. At present, many practitioners in China derive a general FBX model file from a building information model of a model data packet constructed by Revit software, then import the FBX model file into Unity3D, and finally release the FBX model file to a mobile terminal and a Web terminal for display, the method for importing the building information model into Unity3D for display has the biggest defect of high time cost, and the conversion of one model generally takes 1 to 3 hours. In order to solve the above problems, workers have led the building information model into 3DMax, perform a second mapping, and then lead the building information model out to Unity3D for display.
Based on the above problems, how to overcome the above problems becomes a problem to be solved in the art.
Disclosure of Invention
The invention aims to provide a display method and a display system for importing a building information model into Unity3D, so as to reduce import time and labor cost.
To achieve the above object, the present invention provides a display method of importing a building information model into Unity3D, the method comprising:
obtaining a building information model;
extracting and converting the building information model to obtain a model conversion file;
analyzing the model conversion file to obtain a model data structure corresponding to Unity 3D;
and importing the model data structure into Unity3D for display.
Optionally, the extracting and converting the building information model to obtain a model conversion file specifically includes:
analyzing and dispersing the building information model to determine a geometric topological structure;
traversing the geometric topological structure, and determining the member number and the material number of each node;
combining the component number and the material number of each node to generate a unique identifier as an index, and creating a first graph block list of the index;
traversing the geometric topological structure, and determining geometric data of each node model data packet; the geometric data are triangular patch vertex coordinates, triangular patch vertex indexes, normal information, texture mapping coordinates, component names and category names;
storing the geometric data of each node model data packet into a first graph block list to obtain a second graph block list;
constructing a first building information list corresponding to the member number;
traversing the geometric topological structure, and determining the building information of each node model data packet; the construction information comprises the corresponding process, construction method and progress of the member;
storing the building information of each node model data packet into a first building information list to obtain a second building information list;
serializing the second graphic block list and the second building information list in a memory mapping mode to obtain a disk file;
and compressing the material picture corresponding to the material number and the disk file to obtain a model conversion file.
Optionally, the analyzing the model conversion file to obtain a model data structure corresponding to Unity3D includes:
decompressing the model conversion file to obtain a second graphic block list and a second building information list;
assigning the geometric data of each node model data packet in the second graph block list to the geometric object native to Unity 3D; the building information of each node model packet in the second building information list is set as the attribute of the Unity3D native geometric object corresponding to the member number, and a model data structure corresponding to Unity3D is constructed.
Optionally, the importing the model data structure into Unity3D for display includes:
and importing the model data structure into a Unity3D scene, finding the corresponding material number through the component number, loading the corresponding material picture according to the material number, and displaying the building information model in visual equipment.
Optionally, the visual device includes a VR device, an IOS device, an android device, a PC, and a Web end.
The present invention also provides a display system for importing a building information model into Unity3D, the system comprising:
the acquisition module is used for acquiring a building information model;
the extraction and conversion module is used for extracting and converting the building information model to obtain a model conversion file;
the analysis processing module is used for analyzing the model conversion file to obtain a model data structure corresponding to Unity 3D;
and the display module is used for importing the model data structure into Unity3D for display.
Optionally, the extracting and converting module specifically includes:
the analysis and dispersion unit is used for analyzing and dispersing the building information model to determine a geometric topological structure;
the number determining unit is used for traversing the geometric topological structure and determining the member number and the material number of each node;
a first graph block list creating unit, configured to combine the component number and the material number of each node to generate a unique identifier as an index, and create a first graph block list of the index;
the geometric data unit is used for traversing the geometric topological structure and determining geometric data of each node model data packet; the geometric data are triangular patch vertex coordinates, triangular patch vertex indexes, normal information, texture mapping coordinates, component names and category names;
the first storage unit is used for storing the geometric data of each node model data packet into a first graph block list to obtain a second graph block list;
the first building information list construction unit is used for constructing a first building information list corresponding to the member number;
the building information determining unit is used for traversing the geometric topological structure and determining the building information of each node model data packet; the construction information comprises the corresponding process, construction method and progress of the member;
the second storage unit is used for storing the building information of each node model data packet into the first building information list to obtain a second building information list;
the disk file determining unit is used for serializing the second graphic block list and the second building information list in a memory mapping mode to obtain a disk file;
and the model conversion file determining unit is used for compressing the material picture corresponding to the material number and the disk file to obtain a model conversion file.
Optionally, the parsing processing module specifically includes:
the decompression unit is used for decompressing the model conversion file to obtain a second graphic block list and a second building information list;
the model data structure determining unit is used for assigning the geometric data of each node model data packet in the second graph block list to the native geometric object of Unity 3D; the building information of each node model packet in the second building information list is set as the attribute of the Unity3D native geometric object corresponding to the member number, and a model data structure corresponding to Unity3D is constructed.
Optionally, the display module specifically includes:
and the display unit is used for importing the model data structure into a Unity3D scene, finding the corresponding material number through the component number, loading the corresponding material picture according to the material number, and displaying the building information model in the visual equipment.
According to the specific embodiment provided by the invention, the invention discloses the following technical effects:
firstly, extracting and converting the building information model to obtain a model conversion file; then analyzing the model conversion file to obtain a model data structure corresponding to Unity 3D; the model data structure is imported into Unity3D for display, the import time is reduced from the original 1 to 3 hours to 1 to 5 minutes, and the import speed is improved.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings needed to be used in the embodiments will be briefly described below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and it is obvious for those skilled in the art to obtain other drawings without inventive exercise.
FIG. 1 is a flowchart illustrating a method for importing a building information model into Unity3D according to an embodiment of the present invention;
fig. 2 is a diagram of a display system structure for importing the building information model into Unity3D according to an embodiment of the present invention.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
The invention aims to provide a display method and a display system for importing a building information model into Unity3D, so as to reduce import time and labor cost.
In order to make the aforementioned objects, features and advantages of the present invention comprehensible, embodiments accompanied with figures are described in further detail below.
Revit: revit is the name of a suite of software series available from Autodesk. The Revit series software is constructed for a Building Information Model (BIM) and can help architects to design, build and maintain buildings with better quality and higher energy efficiency.
FBX: autodesk FBX is a free three-dimensional authoring and interchange format software for cross-platform products from Autodesk corporation, through which users can access three-dimensional files from most three-dimensional suppliers. The FBX file format supports all major three-dimensional data elements as well as two-dimensional, audio and video media elements.
Unity 3D: unity3D is a comprehensive game development tool developed by Unity Technologies that allows players to easily create multiple platforms of types of interactive content, such as three-dimensional video games, building visualizations, real-time three-dimensional animations, etc., and is a fully integrated professional game engine. Unity is similar to software that takes interactive graphical development environments as the first place, such as Director, Blender, Virtools, or Torque Game Builder. Its editor runs under Windows and Mac OS X and can publish games to Windows, Mac, Wii, iPhone, WebGL (requiring HTML5), Windows phone 8 and android numbering platforms.
3, DMax: 3D Studio Max, often referred to as 3D Max [1] or 3ds MAX for short, is a three-dimensional animation rendering and production software developed by Discreet corporation (later incorporated by Autodesk corporation) based on PC system.
SketchUp: sketchup is a set of design tool directly oriented to the design scheme creation process, the creation process not only can fully express the thought of a designer, but also can fully meet the requirement of instant communication with a client, and the Sketchup enables the designer to directly carry out very intuitive conception on a computer and is an excellent tool for creating the three-dimensional building design scheme.
BIM: the Building Information model (Building Information Modeling) or Building Information Management (Building Information Management) or Building Information manufacturing (Building Information Management) is based on various relevant Information data of a Building engineering project, real Information of a Building is simulated through digital Information simulation, and functions of project supervision, property Management, equipment Management, digital processing, engineering Management and the like are achieved through a three-dimensional Building model. The method has eight characteristics of information completeness, information relevance, information consistency, visualization, coordination, simulation, optimization and graphing.
Web: the web, a global wide area network, also known as the world wide web, is a hypertext and HTTP based, global, dynamically interactive, cross-platform, distributed graphical information system.
FIG. 1 is a flowchart illustrating a method for importing a building information model into Unity3D according to an embodiment of the present invention; as shown in fig. 1, the present invention provides a display method for importing a building information model into Unity3D, the method comprising:
step 10: obtaining a building information model;
step 20: extracting and converting the building information model to obtain a model conversion file;
step 30: analyzing the model conversion file to obtain a model data structure corresponding to Unity 3D;
step 40: and importing the model data structure into Unity3D for display.
The following detailed analysis of each step was performed:
step 10: obtaining a building information model; the building information model is drawn according to Revit software, 3DMax software, SketchUp software and the like.
Step 20: extracting and converting the building information model to obtain a model conversion file; the method specifically comprises the following steps:
step 201: analyzing and dispersing the building information model to determine a geometric topological structure;
step 202: traversing the geometric topological structure, and determining the member number and the material number of each node;
step 203: combining the component number and the material number of each node to generate a unique identifier as an index, and creating a first graph block list of the index;
step 204: traversing the geometric topological structure, and determining geometric data of each node model data packet; the geometric data are triangular patch vertex coordinates, triangular patch vertex indexes, normal information, texture mapping coordinates, component names and category names;
step 205: storing the geometric data of each node model data packet into a first graph block list to obtain a second graph block list;
step 206: constructing a first building information list corresponding to the member number;
step 207: traversing the geometric topological structure, and determining the building information of each node model data packet; the construction information comprises the corresponding process, construction method and progress of the member;
step 208: storing the building information of each node model data packet into a first building information list to obtain a second building information list;
step 209: serializing the second graphic block list and the second building information list in a memory mapping mode to obtain a disk file;
step 210: and compressing the material picture corresponding to the material number and the disk file to obtain a model conversion file.
Step 30: analyzing the model conversion file to obtain a model data structure corresponding to Unity 3D; the method specifically comprises the following steps:
step 301: decompressing the model conversion file to obtain a second graphic block list and a second building information list;
step 302: assigning the geometric data of each node model data packet in the second graph block list to the geometric object native to Unity 3D; the building information of each node model packet in the second building information list is set as the attribute of the Unity3D native geometric object corresponding to the member number, and a model data structure corresponding to Unity3D is constructed.
Step 400: importing the model data structure into Unity3D for display, specifically including:
and importing the model data structure into a Unity3D scene, finding the corresponding material number through the component number, loading the corresponding material picture according to the material number, and displaying the building information model in visual equipment. The visual equipment comprises VR equipment, IOS equipment, Andriod equipment, a PC and a Web end.
Fig. 2 is a structural diagram of a display system for importing a building information model into Unity3D according to an embodiment of the present invention, and as shown in fig. 2, the present invention further provides a display system for importing a building information model into Unity3D, where the system includes:
the acquisition module 1 is used for acquiring a building information model;
the extraction and conversion module 2 is used for extracting and converting the building information model to obtain a model conversion file;
the analysis processing module 3 is used for analyzing the model conversion file to obtain a model data structure corresponding to Unity 3D;
and the display module 4 is used for importing the model data structure into Unity3D for display.
The various modules are discussed in detail below:
the extracting and converting module 2 specifically includes:
the analysis and dispersion unit is used for analyzing and dispersing the building information model to determine a geometric topological structure;
the number determining unit is used for traversing the geometric topological structure and determining the member number and the material number of each node;
a first graph block list creating unit, configured to combine the component number and the material number of each node to generate a unique identifier as an index, and create a first graph block list of the index;
the geometric data unit is used for traversing the geometric topological structure and determining geometric data of each node model data packet; the geometric data are triangular patch vertex coordinates, triangular patch vertex indexes, normal information, texture mapping coordinates, component names and category names;
the first storage unit is used for storing the geometric data of each node model data packet into a first graph block list to obtain a second graph block list;
the first building information list construction unit is used for constructing a first building information list corresponding to the member number;
the building information determining unit is used for traversing the geometric topological structure and determining the building information of each node model data packet; the construction information comprises the corresponding process, construction method and progress of the member;
the second storage unit is used for storing the building information of each node model data packet into the first building information list to obtain a second building information list;
the disk file determining unit is used for serializing the second graphic block list and the second building information list in a memory mapping mode to obtain a disk file;
and the model conversion file determining unit is used for compressing the material picture corresponding to the material number and the disk file to obtain a model conversion file.
The analysis processing module 3 specifically includes:
the decompression unit is used for decompressing the model conversion file to obtain a second graphic block list and a second building information list;
the model data structure determining unit is used for assigning the geometric data of each node model data packet in the second graph block list to the native geometric object of Unity 3D; the building information of each node model packet in the second building information list is set as the attribute of the Unity3D native geometric object corresponding to the member number, and a model data structure corresponding to Unity3D is constructed.
The display module 4 specifically includes:
and the display unit is used for importing the model data structure into a Unity3D scene, finding the corresponding material number through the component number, loading the corresponding material picture according to the material number, and displaying the building information model in the visual equipment.
The model data packet of the invention comprises: geometric data, map data, and model information; the geometric data includes: the vertex coordinates of the triangular patch, the vertex index of the triangular patch, the normal information and the texture mapping coordinates; the map data comprises material pictures; the building information includes: process, construction method, schedule, etc.
The method disclosed by the invention has the following advantages:
1. the building information model obtained by the invention can be drawn by various software such as Revit software, 3DMax software or SketchUp software, and is not limited to the three types.
2. By adopting the method of the invention, the model data structure is imported into the Unity3D scene, so that the building information model can be displayed in a plurality of visual devices such as IOS devices, Andriod devices, PC devices and Web terminals, and the requirements of users in different scenes are met.
3. By adopting the method disclosed by the invention, the model data structure is imported into the Unity3D scene, seamless docking with VR can be realized, and immersive experience can be carried out through VR equipment popular in the market.
4. The metadata in the model data packet supports the model units to be distinguished according to the categories, and a user can screen out the currently concerned categories when observing the model.
5. The metadata in the model data packet supports the labeling of the keyword labels, so that a user can add the labels to the model at will according to the requirement, and the labels concerned are screened out in a specific scene.
6. Firstly, extracting and converting the building information model to obtain a model conversion file; then analyzing the model conversion file to obtain a model data structure corresponding to Unity 3D; the model data structure is imported into Unity3D for display, the import time is reduced from the original 1 to 3 hours to 1 to 5 minutes, and the import speed is improved.
7. By adopting the method designed by the invention, an ordinary operator can import the building information model into the Unity3D scene and display the building information model in the visual equipment, so that a professional import engineer is not needed, and the labor cost is reduced.
For the system disclosed by the embodiment, the description is relatively simple because the system corresponds to the method disclosed by the embodiment, and the relevant points can be referred to the method part for description.
The principles and embodiments of the present invention have been described herein using specific examples, which are provided only to help understand the method and the core concept of the present invention; meanwhile, for a person skilled in the art, according to the idea of the present invention, the specific embodiments and the application range may be changed. In view of the above, the present disclosure should not be construed as limiting the invention.
Claims (7)
1. A method for importing a building information model into Unity3D for display, the method comprising:
obtaining a building information model;
extracting and converting the building information model to obtain a model conversion file;
analyzing the model conversion file to obtain a model data structure corresponding to Unity 3D;
importing the model data structure into Unity3D for display;
the extracting and converting the building information model to obtain a model conversion file specifically comprises:
analyzing and dispersing the building information model to determine a geometric topological structure;
traversing the geometric topological structure, and determining the member number and the material number of each node;
combining the component number and the material number of each node to generate a unique identifier as an index, and creating a first graph block list of the index;
traversing the geometric topological structure, and determining geometric data of each node model data packet; the geometric data are triangular patch vertex coordinates, triangular patch vertex indexes, normal information, texture mapping coordinates, component names and category names;
storing the geometric data of each node model data packet into a first graph block list to obtain a second graph block list;
constructing a first building information list corresponding to the member number;
traversing the geometric topological structure, and determining the building information of each node model data packet; the construction information comprises the corresponding process, construction method and progress of the member;
storing the building information of each node model data packet into a first building information list to obtain a second building information list;
serializing the second graphic block list and the second building information list in a memory mapping mode to obtain a disk file;
and compressing the material picture corresponding to the material number and the disk file to obtain a model conversion file.
2. The method for importing and displaying the building information model into Unity3D according to claim 1, wherein the parsing the model conversion file to obtain the model data structure corresponding to Unity3D specifically comprises:
decompressing the model conversion file to obtain a second graphic block list and a second building information list;
assigning the geometric data of each node model data packet in the second graph block list to the geometric object native to Unity 3D; the building information of each node model packet in the second building information list is set as the attribute of the Unity3D native geometric object corresponding to the member number, and a model data structure corresponding to Unity3D is constructed.
3. The method for importing and displaying the building information model into Unity3D as claimed in claim 1, wherein the importing and displaying the model data structure into Unity3D specifically comprises:
and importing the model data structure into a Unity3D scene, finding the corresponding material number through the component number, loading the corresponding material picture according to the material number, and displaying the building information model in visual equipment.
4. The method for importing the building information model into Unity3D for display as claimed in claim 1, wherein the visual devices include VR device, IOS device, Andriod device, PC and Web side.
5. A display system for importing a building information model into Unity3D, the system comprising:
the acquisition module is used for acquiring a building information model;
the extraction and conversion module is used for extracting and converting the building information model to obtain a model conversion file;
the analysis processing module is used for analyzing the model conversion file to obtain a model data structure corresponding to Unity 3D;
the display module is used for importing the model data structure into Unity3D for display;
the extraction and conversion module specifically comprises:
the analysis and dispersion unit is used for analyzing and dispersing the building information model to determine a geometric topological structure;
the number determining unit is used for traversing the geometric topological structure and determining the member number and the material number of each node;
a first graph block list creating unit, configured to combine the component number and the material number of each node to generate a unique identifier as an index, and create a first graph block list of the index;
the geometric data unit is used for traversing the geometric topological structure and determining geometric data of each node model data packet; the geometric data are triangular patch vertex coordinates, triangular patch vertex indexes, normal information, texture mapping coordinates, component names and category names;
the first storage unit is used for storing the geometric data of each node model data packet into a first graph block list to obtain a second graph block list;
the first building information list construction unit is used for constructing a first building information list corresponding to the member number;
the building information determining unit is used for traversing the geometric topological structure and determining the building information of each node model data packet; the construction information comprises the corresponding process, construction method and progress of the member;
the second storage unit is used for storing the building information of each node model data packet into the first building information list to obtain a second building information list;
the disk file determining unit is used for serializing the second graphic block list and the second building information list in a memory mapping mode to obtain a disk file;
and the model conversion file determining unit is used for compressing the material picture corresponding to the material number and the disk file to obtain a model conversion file.
6. The system of claim 5, wherein the parsing module is further configured to:
the decompression unit is used for decompressing the model conversion file to obtain a second graphic block list and a second building information list;
the model data structure determining unit is used for assigning the geometric data of each node model data packet in the second graph block list to the native geometric object of Unity 3D; the building information of each node model packet in the second building information list is set as the attribute of the Unity3D native geometric object corresponding to the member number, and a model data structure corresponding to Unity3D is constructed.
7. The system for importing the building information model into Unity3D as claimed in claim 5, wherein the display module specifically comprises:
and the display unit is used for importing the model data structure into a Unity3D scene, finding the corresponding material number through the component number, loading the corresponding material picture according to the material number, and displaying the building information model in the visual equipment.
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|---|---|
| CN108597032A (en) | 2018-09-28 |
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