CN117216857A - Digital twin visualization method and platform based on illusion and GIS double engines - Google Patents
Digital twin visualization method and platform based on illusion and GIS double engines Download PDFInfo
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Abstract
The application provides a digital twin visualization method and a digital twin visualization platform based on a ghost engine and a GIS (geographic information System) double engine, which relate to the technical field of digital twin, and aim at the problems that the existing digital twin visualization platform cannot realize the display of a large-scale scene and a fine scene at the same time, the loading speed is limited during multi-user access and smooth loading cannot be realized; the fusion of the spatial data of different data precision and different data sources in the three-dimensional space in the double-engine visual platform is realized through the scene transformation matrix, so that the requirements of large-river-basin scene construction and fine high-fidelity scene construction of the junction part are met, and the visual scene rendering effect is ensured.
Description
Technical Field
The application relates to the technical field of digital twinning, in particular to a digital twinning visualization method and a digital twinning visualization platform based on a phantom and GIS double engine.
Background
The digital twin hydraulic engineering is an important component of the digital twin watershed, is also an entry point and a breakthrough point of the digital twin watershed construction, takes the digitization as a main line, takes the digital scene, the intelligent simulation and the accurate decision as paths, performs digital mapping on hydraulic engineering entities and construction and operation management activities, and aims at synchronous simulation operation and virtual-real interaction with physical engineering, so as to construct a hydraulic digital twin platform, promote hydraulic engineering construction and operation management, and promote high-quality development of the hydraulic engineering intelligent construction and digital transformation. According to the four-horizontal three-vertical digital twin integral frame, the digital twin platform is a service platform formed by data, model, knowledge and other resources and engines for managing, expressing and driving the resources, and the capability of virtually reproducing real hydraulic engineering in network space is provided. The digital twin visualization platform provides visual presentation for analog simulation based on data information of the data base plate, combines with a water conservancy professional model calculation process and a result, provides real-time rendering for analog simulation, and provides high-fidelity scene service for business application.
The digital twin visual platform not only requires multi-user access but also requires smooth loading speed, and requires attractive and fine scenes and relates to a macro scene range. The existing digital twin visual platform can not only realize the display of a large-scale scene, but also realize the display of a fine scene, and the loading speed is limited during multi-user access, so that smooth loading can not be realized.
The GIS engine can realize the construction of a large-scale scene, the illusion engine is suitable for constructing a fine scene, and a digital twin visual platform is designed by combining the characteristics of the two engines, so that a research direction is provided for the application.
Disclosure of Invention
The application provides a digital twin visualization method and a digital twin visualization platform based on a phantom and GIS double engine, which can meet the display effect and application function requirements of the digital twin visualization platform, and provide a complete solution for the construction of the digital twin visualization platform. The scheme can be applied to the operation and maintenance stage of hydraulic engineering, a large-scale scene is built by utilizing a GIS engine, a fine scene is built by utilizing a phantom engine, and when a dangerous situation occurs, the digital twin visual platform is utilized to simulate the preview, so that comprehensive decision can be assisted, an emergency plan can be quickly generated, and three-dimensional visual scene support is provided for each digital twin business application system.
The application provides a digital twin visualization method based on a phantom and GIS double engine, which meets the requirement of simultaneous access of multiple users in digital twin engineering and ensures the loading speed of simultaneous access of multiple users. In addition, the dual-engine digital twin visualization platform performs unified fusion on the multi-source heterogeneous data base plate, so that multi-source, heterogeneous and multi-time space data can achieve twin scenes of seamless conversion of resource levels and seamless construction of data and terrains.
The method specifically comprises the following steps:
step S1, acquiring a BIM model of hydraulic engineering, and performing format conversion on the BIM model to acquire a file which can be identified by a illusion engine and a file which can be identified by a GIS engine;
step S2, setting up a fictitious engine scene: constructing a three-dimensional scene through the BIM model, the live-action model and the bottom plate data of the remote sensing image, adding materials, animation and light effect to the model data in the scene, and restoring the engineering scene in a high-simulation mode to realize engineering operation simulation;
step S3, building a GIS engine scene: constructing a river basin level scene through remote sensing images, a digital elevation model, an oblique photography model, a BIM model and space basic data, wherein the scene is provided with a real coordinate system, and real space position, shape and texture information of a space object are reflected, so that three-dimensional space analysis and operation are performed;
step S4, switching the double-engine scene: the feature parameter vector conversion from the initial scene to the target scene is realized through matrix operation, and the unification and the accurate fusion of the scene images of the illusion engine and the GIS engine are realized.
Further, in the step S2, the building of the illusion engine scene specifically includes:
step S21, format conversion: the BIM model, the live-action model and the remote sensing image are adjusted into a format required by the illusion engine through the plug-in unit;
step S22, material adjustment: the model after format conversion is endowed with materials again, and illumination and texture are adjusted to keep consistent with the actual scene;
step S23, interactive function development: and (3) performing visual script on the model subjected to material adjustment by using the illusion engine blueprint, and completing interactive function development through low codes.
Further, in the step S3, the GIS engine scene building specifically includes:
step S31, applying for resources: building a BIM+GIS platform, applying for data resources from the BIM+GIS platform, and applying for the data resources to a visualization platform;
step S32, configuring a scene: after the data resource is applied to the visual platform, selecting a required layer configuration scene;
step S33, customizing development: and carrying out customized development of service application through an interface, wherein the customized development comprises toolbar configuration, function button configuration and viewpoint configuration.
Further, in the step S4, the dual-engine scene switching specifically includes:
step S41, determining a scene feature parameter vector: adding a coordinate system into the illusion engine corresponding to the geodetic coordinate system of the GIS engine, and taking the scene viewpoint coordinates, the scene scale and the view angle as scene feature vectors;
step S42, introducing a transformation matrix as a scene transformation matrix;
step S43, solving a transformation matrix: solving a transformation matrix through projection analysis of different scene characteristic parameter vectors;
step S44, parameter conversion: and (3) acting the transformation matrix on the initial scene characteristic parameter vector to realize the scene switching of the double engines.
Further, the step S21 further includes performing a lightweight process for removing multiple levels of detail on the model.
Further, in the step S42, the scene change matrixTranMThe expression can be as follows:
TranM=T×S×R；
t is a translation transformation matrix, which can be expressed as:
；
s is a scaling transformation matrix, which can be expressed as:
；
r is a rotation transformation matrix, which can be expressed as:
；
wherein,
transmission. X is the x-direction offset coefficient;
the translation. Y is the y-direction offset coefficient;
the translation. Z is the z-direction offset coefficient;
scale.x is the x-direction scaling factor;
scale.y is the y-direction scaling factor;
scale.z is the z-direction scaling factor;
θ x is the rotation angle in the x direction;
θ y is the rotation angle in the y direction;
θ z is the z-direction rotation angle.
Further, in the step S44, the applying the transformation matrix to the initial scene feature parameter vector may be expressed as:
A’=TranMA；
wherein,
Afor the initial scene feature parameter vector,A=[x，y，z，1] T ；
A’for the object scene feature parameter vector,A’=[x’，y’，z’，1] T ；
TranMis a scene change matrix.
The digital twin visualization platform based on the ghost and GIS double engines is used for realizing the digital twin visualization method based on the ghost and GIS double engines, and comprises the following modules:
and a data acquisition module: the method comprises the steps of acquiring a BIM model of hydraulic engineering, and performing format conversion on the BIM model to acquire a file which can be identified by a illusion engine and a file which can be identified by a GIS engine;
the illusion engine scene building module: the system is connected with the data acquisition module and is used for constructing a three-dimensional scene through the BIM model, the live-action model and the bottom plate data of the remote sensing image, adding materials, animation and light shadow effects to the model data in the scene, and restoring the engineering scene in a high simulation mode to realize engineering operation simulation;
GIS engine scene building module: the system is connected with the data acquisition module and is used for constructing a river basin level scene through remote sensing images, digital elevation models, oblique photography models, BIM models and space basic data, the scene is provided with a real coordinate system, the space position, shape and texture information of a space object are reflected truly, and three-dimensional space analysis and operation can be performed;
a dual engine scene switching module: the system is connected with the illusion engine scene building module and the GIS engine scene building module and is used for realizing the characteristic parameter vector conversion from an initial scene to a target scene through matrix operation and realizing the unification and the accurate fusion of the illusion engine and the GIS engine scene pictures.
Further, the platform operates on a cloud server.
Compared with the prior art, the application has the beneficial effects that:
firstly, through the reasonable cooperation support of the double engines of the illusion engine and the GIS engine, the problem that the simultaneous access loading of multiple users is difficult in digital twin engineering is solved, the simultaneous providing of scene access loading for multiple users can be supported, and the scene services accessed by different users are ensured to be independent and noninterference;
secondly, the fusion of the spatial data of different data precision and different data sources in the three-dimensional space in the double-engine visual platform is realized through the scene transformation matrix, so that the requirements of large-river-basin scene construction and fine high-fidelity scene construction of the junction part are met, and the visual scene rendering effect is ensured.
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In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the drawings that are needed in the description of the embodiments or the prior art will be briefly described, and it is obvious that the drawings in the description below are some embodiments of the present application, and other drawings can be obtained according to the drawings without inventive effort for a person skilled in the art.
FIG. 1 is a flow chart of the implementation of embodiment 1 of the present application;
fig. 2 is a schematic diagram of a system in embodiment 2 of the present application.
Detailed Description
The following description of the embodiments of the present application will be made apparent and fully in view of the accompanying drawings, in which some, but not all embodiments of the application are shown. All other embodiments, which can be made by those skilled in the art based on the embodiments of the application without making any inventive effort, are intended to be within the scope of the application.
It will be appreciated by those of skill in the art that the following specific embodiments or implementations are provided as a series of preferred arrangements of the present application for further explanation of the specific disclosure, and that the arrangements may be used in conjunction or association with each other, unless it is specifically contemplated that some or some of the specific embodiments or implementations may not be associated or used with other embodiments or implementations. Meanwhile, the following specific examples or embodiments are merely provided as an optimized arrangement, and are not to be construed as limiting the scope of the present application.
The following describes specific embodiments of the present application with reference to the drawings (tables).
The application provides a digital twin visual platform based on a ghost and GIS double engine, which aims at the problems that the existing digital twin visual platform can not realize the display of a large-scale scene and a fine scene at the same time, the loading speed is limited during the access of multiple users, and the smooth loading can not be realized; the fusion of the spatial data of different data precision and different data sources in the three-dimensional space in the double-engine visual platform is realized through the scene transformation matrix, so that the requirements of large-river-basin scene construction and fine high-fidelity scene construction of the junction part are met, and the visual scene rendering effect is ensured.
Example 1
As shown in fig. 1, the digital twin visualization method based on the ghost and GIS double engines uses the GIS engine to build a large-scale scene, uses the ghost engine to build a fine scene, and provides three-dimensional visualization scene support for the digital twin service application system, and specifically comprises the following steps:
step S1, a BIM model of hydraulic engineering is obtained, format conversion is carried out on the BIM model, and files which can be identified by the illusion engine and files which can be identified by the GIS engine are obtained.
According to the actual condition of physical engineering, bentley Microstation software is utilized to build a BIM model mapped with the physical engineering, the file format of the model is DGN format, and the GIS engine and the illusion engine cannot use the file format, so that the file needs to be subjected to format conversion. And converting the DGN file into an IFC format by using tool software, and identifying model graphic information and attribute information by using the IFC analysis capability of the GIS engine so as to load the BIM model into a GIS engine scene. Meanwhile, the DGN file is converted into an FBX format by using a conversion tool, mapping optimization is carried out on the FBX by using 3Dmax software, and the optimized FBX is imported into the illusion engine by using Datasmith FBX Importer plug-in.
Step S2, setting up a fictitious engine scene: and constructing a three-dimensional scene through the BIM model, the live-action model and the bottom plate data of the remote sensing image, adding materials, animation and light effect to the model data in the scene, and restoring the engineering scene in high simulation to realize engineering operation simulation.
By constructing a three-dimensional scene by utilizing data base plate data such as a BIM model, a live-action model, a remote sensing image and the like and adding materials, animation, light shadow effects and the like to model data in the scene, the engineering scene can be restored in a high simulation mode, and engineering operation simulation is realized. However, in order to achieve the optimal display effect in the scene construction process, a great deal of time is required for model processing, material adjustment, UV (ultraviolet) display surface and animation special effect processing. The method comprises the following specific steps:
step S21, format conversion: the BIM model, the live-action model, the remote sensing image and other data have various different file formats, and the BIM model, the live-action model, the remote sensing image and other data are firstly adjusted into the formats of fbx, obj and the like required by the illusion engine through a Datasmith plug-in. The model is optionally subjected to necessary light-weight processing for removing multiple detail layers, namely the light-weight processing is required under the condition that the loading speed of the platform is obviously influenced by the model body and the detail is removed after the light-weight processing has no influence on the visualization requirement of the platform.
Step S22, material adjustment: after the format conversion is carried out on the model, the model needs to be endowed with materials again, the model keeps consistent with the actual scene, the illusion engine has a powerful material rendering function, and illumination and textures are required to be adjusted in order to obtain the optimal high-fidelity rendering effect;
step S23, interactive function development: by using the UE5 blueprint to carry out the visual script, the development of the interaction function of low codes can be realized, such as opening and closing actions of a gate, ship lock operation simulation, model splitting, sectioning, revealing and the like. Different effects can be displayed according to different parameters input by a user.
The GIS engine is utilized to build a large-scale scene, the illusion engine is utilized to build a fine scene, and when a dangerous situation occurs, the digital twin visual platform is utilized to simulate previewing, so that comprehensive decision making can be assisted, an emergency plan can be quickly generated, and three-dimensional visual scene support is provided for each digital twin business application system. The function is the core requirement and the final goal of the digital twin platform, the visual platform is used as an important component of the digital twin platform to mainly reflect the outstanding effect in a 'preview' link in a 'four-preview' full chain, and the visual platform is mainly applied to the dual-engine switching visual platform.
The technical scheme mainly comprises the customized development of the interactive function in the steps S23 and S33.
Step S3, building a GIS engine scene: the river basin level scene is constructed through the remote sensing image, the digital elevation model, the oblique photography model, the BIM model and the space basic data, the scene is provided with a real coordinate system, the space position, the shape and the texture information of a space object are reflected truly, and three-dimensional space analysis and operation can be performed.
The scene construction of the GIS engine mainly depends on remote sensing images, digital elevation models, oblique photography models, BIM models, space basic data and the like to construct a river basin-level scene, the scene has a real coordinate system, the space position, the shape and the texture information of a space object are truly reflected, three-dimensional space analysis and operation can be performed, unique complex space object management capability and space analysis capability are provided, and geographic information can be accurately and specifically mapped into a virtual world from the real world. The method comprises the following specific steps:
step S31, applying for resources: in order to better organize and manage data, a project-specific BIM+GIS platform is constructed, a large-river-basin scene is built through a GIS engine, firstly, data resources are applied from the BIM+GIS platform, HTTP requests are executed on URIs, and rjson format is output;
step S32, configuring a scene: after the data resource is applied to the visualization platform, the scene is configured by selecting the required layers. Services added in the resource directory can configure the names displayed by the services, consider whether the services are initially displayed in a scene or not, and support the addition of a plurality of layers of directories;
step S33, customizing development: and carrying out customized development of service application through an interface packaged by the SDK. The toolbar configuration is firstly carried out, and the toolbar configuration mainly comprises basic functions and function buttons relevant to specific service requirements, such as functions of zooming in, zooming out, inquiring, analyzing and the like. And then configuring a camera, namely, the position and the view angle displayed when the camera initially enters the scene, directly inputting parameters such as longitude and latitude, altitude, orientation, inclination and the like, directly adjusting the visual range in the scene, clicking the view point to pick up, and acquiring the position of the current view point.
Step S4, switching the double-engine scene: the visualization platform adopts a GIS engine to provide a large-scale scene of the river basin, and utilizes a illusion engine to provide a fine scene of the engineering.
The main purpose of the dual engine switching is to solve the multi-user problem, and the original scheme can obtain more ideal effect for loading the illusion engine. However, due to contradiction of the number of users and the demand, the visualized demand of the platform for the large-river-basin scene generally does not relate to the fine scene of the junction area according to the actual application scene, and the GIS engine for the large-river-basin scene and the phantom engine for the junction scene are deduced through the demand function planning, so that the demand of the users is met, and meanwhile, the limitation of the phantom engine on the concurrency of the users and the excessively high demand on hardware are avoided.
In order to ensure accurate fusion of scenes with different scales, a scene rapid transformation control technology is developed. The method comprises the following specific steps:
step S41, determining a scene feature parameter vector: and (3) adding a coordinate system into the illusion engine corresponding to the geodetic coordinate system of the GIS engine, and taking the scene viewpoint coordinates, the scene scale and the view angle as scene feature vectors.
In step S42, a transformation matrix is introduced as a scene transformation matrix.
The scene change matrixTranMThe expression can be as follows:
TranM=T×S×R；
t is a translation transformation matrix, which can be expressed as:
；
s is a scaling transformation matrix, which can be expressed as:
；
r is a rotation transformation matrix, which can be expressed as:
；
wherein,
transmission. X is the x-direction offset coefficient;
the translation. Y is the y-direction offset coefficient;
the translation. Z is the z-direction offset coefficient;
scale.x is the x-direction scaling factor;
scale.y is the y-direction scaling factor;
scale.z is the z-direction scaling factor;
θ x is the rotation angle in the x direction;
θ y is the rotation angle in the y direction;
θ z is the z-direction rotation angle.
Introducing a transformation matrix as a scene transformation matrix may achieve the following beneficial effects: compared with the traditional method of directly rotating the angle and translating the position, the method has higher precision of the scene transformation matrix, so that the illusion engine and the GIS engine realize noninductive switching.
Step S43, solving a transformation matrix: the transformation matrix is solved through projection analysis of the characteristic parameter vectors of different scenes.
Step S44, parameter conversion: and (3) acting the transformation matrix on the initial scene characteristic parameter vector to realize the scene switching of the double engines.
The application of the transformation matrix to the initial scene feature parameter vector can be expressed as:
A’=TranMA；
wherein,
Afor the initial scene feature parameter vector,A=[x，y，z，1] T ；
A’for the object scene feature parameter vector,A’=[x’，y’，z’，1] T ；
TranMis a scene change matrix.
Example 2
The application also provides a digital twin visualization platform based on the ghost and GIS double engines, which is used for realizing the digital twin visualization method based on the ghost and GIS double engines in any one of the embodiment 1, and the platform operates on a cloud server. The method specifically comprises the following modules:
and a data acquisition module: the method comprises the steps of acquiring a BIM model of hydraulic engineering, and performing format conversion on the BIM model to acquire a file which can be identified by a illusion engine and a file which can be identified by a GIS engine;
the illusion engine scene building module: the system is connected with the data acquisition module and is used for constructing a three-dimensional scene through the BIM model, the live-action model and the bottom plate data of the remote sensing image, adding materials, animation and light shadow effects to the model data in the scene, and restoring the engineering scene in a high simulation mode to realize engineering operation simulation;
GIS engine scene building module: the system is connected with the data acquisition module and is used for constructing a river basin level scene through remote sensing images, digital elevation models, oblique photography models, BIM models and space basic data, the scene is provided with a real coordinate system, the space position, shape and texture information of a space object are reflected truly, and three-dimensional space analysis and operation can be performed;
a dual engine scene switching module: the system is connected with the illusion engine scene building module and the GIS engine scene building module and is used for realizing the characteristic parameter vector conversion from an initial scene to a target scene through matrix operation and realizing the unification and the accurate fusion of the illusion engine and the GIS engine scene pictures.
According to the digital twin visualization method and platform based on the ghost and GIS double engines, the problem that multiple users are difficult to access and load simultaneously in digital twin engineering is solved through reasonable cooperation support of the ghost engine and the GIS double engines, the simultaneous scene access and load for multiple users can be supported, and the scene services accessed by different users are ensured to be independent and noninterference. The illusion engine can simulate and present the natural environment simulation, the running situation simulation, the water conservancy service simulation and other modules, and the natural environment simulation mainly carries out visual presentation on related data from the aspects of time state simulation, atmospheric environment simulation, illumination simulation and the like. According to the day and night states switched at different times, the environment state of the digital twin scene in a certain time period is displayed, and the rendering effect of the scene in different environments is simulated through the simulation of natural weather such as rain, snow, fog and the like.
And the real-time monitoring data, the running data and the abnormal alarm data of various monitoring devices are collected and counted by combining with the Internet of things sensor, and are classified, positioned and displayed in a scene. The water conservancy service simulation can support three-dimensional simulation of water conservancy service scenes such as water level, river, flood and the like, including inundation analysis, gate opening and closing, water level simulation and the like, and provides scientific control basis and decision direction for water conservancy service expression and four-pre-treatment. Meanwhile, the double-engine visual platform enables the spatial data of different data precision and different data sources to be fused in a three-dimensional space, thereby meeting the requirements of large-river-basin scene building and junction-position fine high-fidelity scene building and guaranteeing the visual scene rendering effect.
Finally, it should be noted that: the above embodiments are only for illustrating the technical solution of the present application, and not for limiting the same; although the application has been described in detail with reference to the foregoing embodiments, it will be understood by those of ordinary skill in the art that: the technical scheme described in the foregoing embodiments can be modified or some or all of the technical features thereof can be replaced by equivalents; such modifications and substitutions do not depart from the spirit of the application.
Claims (9)
1. The digital twin visualization method based on the ghost and GIS double engines is characterized in that a large-scale scene is built by using the GIS engine, a fine scene is built by using the ghost engine, and a three-dimensional visualization scene support is provided for a digital twin service application system, and the method specifically comprises the following steps:
step S1, acquiring a BIM model of hydraulic engineering, and performing format conversion on the BIM model to acquire a file which can be identified by a illusion engine and a file which can be identified by a GIS engine;
step S2, setting up a fictitious engine scene: constructing a three-dimensional scene through the BIM model, the live-action model and the remote sensing image, adding materials, animation and light shadow effects to model data in the scene, and restoring an engineering scene to realize engineering operation simulation;
step S3, building a GIS engine scene: constructing a river basin level scene through remote sensing images, a digital elevation model, an oblique photography model, a BIM model and space basic data, wherein the scene is provided with a real coordinate system, and real reflects the space position, shape and texture information of a space object to perform three-dimensional space analysis and operation;
step S4, switching the double-engine scene: the feature parameter vector conversion from the initial scene to the target scene is realized through matrix operation, and the fusion of the scene pictures of the illusion engine and the GIS engine is realized.
2. The digital twin visualization method based on the ghost and GIS double engines according to claim 1, wherein in the step S2, the ghost engine scene building specifically includes:
step S21, format conversion: the BIM model, the live-action model and the remote sensing image are adjusted into a format required by the illusion engine through the plug-in unit;
step S22, material adjustment: the model after format conversion is endowed with materials again, and illumination and texture are adjusted to keep consistent with the actual scene;
step S23, interactive function development: and (3) performing visual script on the model subjected to material adjustment by using the illusion engine blueprint, and completing interactive function development through low codes.
3. The digital twin visualization method based on the phantom and GIS dual engine according to claim 1, wherein in the step S3, the GIS engine scene building specifically includes:
step S31, applying for resources: building a BIM+GIS platform, applying for data resources from the BIM+GIS platform, and applying for the data resources to a visualization platform;
step S32, configuring a scene: after the data resource is applied to the visual platform, selecting a required layer configuration scene;
step S33, customizing development: and carrying out customized development of service application through an interface, wherein the customized development comprises toolbar configuration, function button configuration and viewpoint configuration.
4. The digital twin visualization method based on the phantom and GIS dual engine of claim 1, wherein in the step S4, the dual engine scene switching specifically includes:
step S41, determining a scene feature parameter vector: adding a coordinate system into the illusion engine corresponding to the geodetic coordinate system of the GIS engine, and taking the scene viewpoint coordinates, the scene scale and the view angle as scene feature vectors;
step S42, introducing a transformation matrix as a scene transformation matrix;
step S43, solving a transformation matrix: solving a transformation matrix through projection analysis of different scene characteristic parameter vectors;
step S44, parameter conversion: and (3) acting the transformation matrix on the initial scene characteristic parameter vector to realize the scene switching of the double engines.
5. The digital twin visualization method based on the phantom and GIS dual engine according to claim 2, wherein the step S21 further comprises a lightweight process of removing multiple levels of detail for the model.
6. The digital twin visualization method according to claim 4, wherein in step S42, the scene change matrixTranMThe expression can be as follows:
TranM=T×S×R；
t is a translation transformation matrix, which can be expressed as:
；
s is a scaling transformation matrix, which can be expressed as:
；
r is a rotation transformation matrix, which can be expressed as:
；
wherein,
transmission. X is the x-direction offset coefficient;
the translation. Y is the y-direction offset coefficient;
the translation. Z is the z-direction offset coefficient;
scale.x is the x-direction scaling factor;
scale.y is the y-direction scaling factor;
scale.z is the z-direction scaling factor;
θ x is the rotation angle in the x direction;
θ y is the rotation angle in the y direction;
θ z is the z-direction rotation angle.
7. The digital twin visualization method based on the phantom and GIS dual engine according to claim 4, wherein in the step S44, the application of the transformation matrix to the initial scene feature parameter vector may be expressed as:
A’=TranMA；
wherein,
Afor the initial scene feature parameter vector,A=[x，y，z，1] T ；
A’for the object scene feature parameter vector,A’=[x’，y’，z’，1] T ；
TranMis a scene change matrix.
8. A digital twin visualization platform based on a phantom and GIS dual engine for implementing the digital twin visualization method based on a phantom and GIS dual engine according to any one of claims 1-7, characterized by comprising the following modules:
and a data acquisition module: the method comprises the steps of acquiring a BIM model of hydraulic engineering, and performing format conversion on the BIM model to acquire a file which can be identified by a illusion engine and a file which can be identified by a GIS engine;
the illusion engine scene building module: the system is connected with the data acquisition module and is used for constructing a three-dimensional scene through the BIM model, the live-action model and the bottom plate data of the remote sensing image, adding materials, animation and light shadow effects to the model data in the scene, and restoring the engineering scene to realize engineering operation simulation;
GIS engine scene building module: the system is connected with the data acquisition module and is used for constructing a river basin level scene through remote sensing images, digital elevation models, oblique photography models, BIM models and space basic data, the scene is provided with a real coordinate system, the space position, shape and texture information of a space object are reflected truly, and three-dimensional space analysis and operation can be performed;
a dual engine scene switching module: the system is connected with the illusion engine scene building module and the GIS engine scene building module and is used for realizing the characteristic parameter vector conversion from an initial scene to a target scene through matrix operation and realizing the fusion of the illusion engine and GIS engine scene pictures.
9. The digital twin visualization platform based on phantom and GIS dual engines of claim 8, wherein the platform operates on a cloud server.
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN117473632A (en) * | 2023-12-26 | 2024-01-30 | 深圳市前海数字城市科技有限公司 | Method, device, equipment and storage medium for processing building information model |
| CN117478726A (en) * | 2023-12-26 | 2024-01-30 | 中国电建集团西北勘测设计研究院有限公司 | Internet of things data transmission method and system for butting illusion engines |
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| CN117593471A (en) * | 2024-01-18 | 2024-02-23 | 青岛国实科技集团有限公司 | Ocean three-dimensional situation visualization platform based on illusion engine |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN117473632A (en) * | 2023-12-26 | 2024-01-30 | 深圳市前海数字城市科技有限公司 | Method, device, equipment and storage medium for processing building information model |
| CN117478726A (en) * | 2023-12-26 | 2024-01-30 | 中国电建集团西北勘测设计研究院有限公司 | Internet of things data transmission method and system for butting illusion engines |
| CN117473632B (en) * | 2023-12-26 | 2024-05-03 | 深圳市前海数字城市科技有限公司 | Method, device, equipment and storage medium for processing building information model |
| CN117475041A (en) * | 2023-12-28 | 2024-01-30 | 湖南视觉伟业智能科技有限公司 | Digital twin shore bridge simulation method based on RCMS |
| CN117475041B (en) * | 2023-12-28 | 2024-03-29 | 湖南视觉伟业智能科技有限公司 | Digital twin shore bridge simulation method based on RCMS |
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