CN113096255A - WebGL-based three-dimensional view synchronous fusion non-invasive integration technical method - Google Patents
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Abstract
The invention discloses a WebGL-based three-dimensional view synchronous fusion non-invasive integration technical method, which is characterized by comprising the following steps of: the method comprises the following steps: the method comprises the following steps: carrying out scene visualization information lightweight processing: s1: a model decomposition extraction method; s2: a data cleaning method; s3: a model geometric optimization method; s4: a model fusion method; s5: a model hierarchical rendering method; step two: and (3) message transfer station: s6: acquiring operation information; s7: analyzing the obtained operation information; s8: distributing the analyzed operation information to a three-dimensional scene; s9: the three-dimensional scene receives the information and performs an operation. The three-dimensional view and third-party view element weight reduction processing method is reasonable in design, solves the problem that three-dimensional views are synchronously fused and rapidly rendered, achieves the consistency of the three-dimensional views in height, visual angle and precision under unified operation, and shows a smoother demonstration effect.
Description
Technical Field
The invention belongs to the application field of web graphic library technology, and particularly relates to a WebGL-based three-dimensional view synchronous fusion non-invasive integration technical method.
Background
The concept of a Web Graphics Library (WebGL, Web Graphics Library) is a 3D drawing protocol, which can directly display scenes and models more smoothly in a browser by means of a system display card, and can also create complex navigation and data visualization, solve the problem of interactive three-dimensional animation, avoid the support of browser plug-ins, perform Graphics rendering by using the Graphics hardware acceleration function of the bottom layer, and implement through a unified, tiled, cross-platform OpenGL interface. WebGL can render high-performance interactive 3D graphics in any compatible Web browser, plug-in installation is avoided, pure H5 Web free integration, integration and customization can be achieved with an upper existing system and a lower existing system, GIS and BIM applications are used as cores, and large-screen visual display is covered. At present, most BIM platforms are constructed by adopting a Web technology based on a browser, a platform adopting the WEB technology can cross a network protocol, a server is very convenient to install, deploy and maintain, the reliability is high, the platform-crossing and transplantable characteristics are achieved, the efficient collaborative sharing of situation information is realized, various problems of client deployment do not exist, and the method is a preferred application system technical scheme for constructing a private cloud platform. If the GIS data is pure GIS data, multi-level pyramid data can be constructed according to the original pyramid structure of the GIS system, and then the browser client executes a hierarchical and gradual replacement rendering strategy, namely: according to the distance of the camera, only the loaded level GIS data can be selected, and meanwhile, data outside the screen are removed from the memory and the CPU, so that smooth operation experience is realized. Therefore, the integration of the GIS and the BIM can be processed according to such a system, on the basis of the traditional WebGL, how to realize the technology of realizing the three-dimensional view synchronous fusion non-invasive integration in the traditional webpage by means of the mainstream technical route, and realizing the consistency of the height, the visual angle and the precision, which is the core of the WebGL based three-dimensional view synchronous fusion non-invasive integration technology, and secondly, for the GIS data, the data volume of the BIM data is particularly large, how to smoothly access in a browser, and how to realize the WebGL based three-dimensional view synchronous fusion integration third-party platform, and realize the smooth visual effect.
At present, the problem of synchronous fusion of three-dimensional views is bound to be faced after the WebGL technology is applied to a smart city, massive model data information which is large in range and dynamic in real time exists, and problems and challenges in various aspects such as large-quantity dynamic loading and browsing performance exist in a common application mode:
problem of simultaneous fusion of three-dimensional views: different three-dimensional views have different processing mechanisms for operations under WebGL, and the problems of inconsistent height, different precision, visual angle deviation and the like can occur under the same operation;
loading mass model data: the file size of a single conventional building complete full-element model generally reaches 2G,1000 ten thousand triangular faces and 10 thousand components, the model is several times larger for a super high-rise complex building, in addition, a CIM platform is a system facing to an urban area level, the platform size covers hundreds to tens of thousands of building groups, the whole model data belongs to a mass level, and the traditional loading and application method inevitably encounters a bottleneck and difficulty;
for the browsing performance problem: loading a plurality of three-dimensional views based on WebGL, solving the problems of supporting and fluency operation of a browser and the problem of mass model data, wherein dynamic loading has bottleneck and difficulty, the browsing performance of scenes is also influenced, the traditional mode can not efficiently, quickly and fluently control and browse, and the technical index can not reach ideal 60 frames/second;
therefore, a non-invasive integration technical method based on WebGL three-dimensional view synchronous fusion is provided.
Disclosure of Invention
The invention aims to overcome the problems in the prior art, and provides a WebGL-based non-invasive integration technical method for three-dimensional view synchronous fusion.
In order to achieve the technical purpose and achieve the technical effect, the invention is realized by the following technical scheme:
a non-invasive integration technical method based on WebGL three-dimensional view synchronous fusion comprises the following steps:
the method comprises the following steps: carrying out scene visualization information lightweight processing:
s1: a model decomposition extraction method;
s2: a data cleaning method;
s3: a model geometric optimization method;
s4: a model fusion method;
s5: a model hierarchical rendering method;
step two: and (3) message transfer station:
s6: acquiring operation information;
s7: analyzing the obtained operation information;
s8: distributing the analyzed operation information to a three-dimensional scene;
s9: the three-dimensional scene receives the information and performs an operation.
Preferably, in S1, the method includes S101: analyzing the recognition object: the method comprises the following steps of automatically identifying CIM model elements such as buildings, roads, greenery, water systems, small products and the like, and entity elements such as building internal structures, equipment implementation, pipeline pipelines, sensors and the like through a primary SDK development program tool of a model file; CIM model characteristics, such as model organization characteristics of points, lines, surfaces, arcs and the like; s102: and (3) decomposing the object: decomposing the model through a model organization standard according to the recognition result, and generating a set of model standard library after decomposition processing; s103: object extraction: and extracting the model objects which are mainly concerned by the user and are related to the application management according to the model extraction standard and the AI algorithm.
Preferably, in S2, the method includes S201: and (3) making a cleaning rule: formulating a set of CIM model cleaning rules, including geometric primitive filtering rules, topological rules, deletion rules, priority rules and the like; s202: and (3) checking model data: the data is examined and checked, so that repeated information, topological errors, redundant information and the like are checked, the consistency of the data is checked, a problem examination report is generated, and a corresponding object can be searched according to a problem record; s203: model data cleaning: according to the problem inspection report, data are selected for cleaning, all problematic model elements and characteristics are cleaned, cleaning items can be selected in a targeted mode during cleaning, and objects which are not cleaned are reserved.
Preferably, in S3, a "geometric transformation" technique is adopted, a final objective of geometric transformation is to reduce the model surface number, a conventional geometric model is a static model, a "dynamic" model can be realized by "geometric transformation" optimization, and intelligent representation of the model is realized by "dynamic" of a static geometric primitive in a manner of parameterized geometric description and triangulated geometric description, where the parameterized geometric description describes a geometric object by using a plurality of parameters, and the triangulated geometric description describes a geometric object by using a plurality of triangles.
Preferably, in S4, the method includes S401: and (3) fusion rule formulation: a set of fusion rules is formulated according to model organization standards, a fused model category is specified, and fusion affiliation of each object, primitive and element is set, namely, which objects are fused together is specified; s402: model fusion: the intelligent fusion technology is adopted, the model is fused according to the fusion rule, the related objects are merged, redundancy and repetition are deleted in the fusion process, if a plurality of objects share a common edge or surface, only one edge or surface is reserved after fusion, and the number of the surfaces of the model is reduced.
Preferably, in S5, a "model rendering" technique is adopted, multiple LODs (levels of detail) are used for model display, the single-image rendering speed is accelerated, the multiple LODs represent objects by geometric objects of different levels, and a model loaded farther away is coarser, and a model loaded nearer away is finer, so that the display efficiency is improved and the storage is reduced on the premise of not affecting the visual effect.
Preferably, in S6, the operation information of the mouse is obtained through a native technique of the three-dimensional scene, and the mouse operation generally includes operation information such as clicking, translating, zooming, dragging, and rotating.
Preferably, in S7, the operation information is received in the background, and the operation information is subjected to operation parsing and integrated into a format that the three-dimensional scene can process and receive through code logic parsing.
Preferably, in S8, the parsed information is returned to the three-dimensional scene in a message passing manner.
Preferably, in S9, the three-dimensional scene receives the information returned after analysis, and then analyzes and identifies the returned information through the self-contained function, where the returned information is different and the executed operations are different; the received information of the three-dimensional views with different front ends is the same, but the internal analysis of the three-dimensional views is different at that time, and the three-dimensional views analyze the received information by means of the internal analysis mode of the three-dimensional views so as to identify and execute the operation, thus realizing the effect of synchronously fusing the three-dimensional views and integrating the non-invasive integration, and displaying the scene information with the same height, view angle and precision.
Compared with the prior art, the invention has the following beneficial effects:
the invention has reasonable design, the first: the technical goals of lightweight loading and efficient rendering of the city information model data are achieved by analyzing the file format of CIM city information model data based on the WebGL technology, decomposing and extracting visual elements and characteristic information, cleaning the model data, hierarchically layering the model, geometrically expressing and optimizing the elements and reasonably combining spatial elements;
secondly, the method comprises the following steps: the three-dimensional view is rendered based on WebGL, the three-dimensional view and the third-party view elements are subjected to light weight processing by acquiring operation under the WebGL and processing through an analysis and information transfer station and then distributed to the three-dimensional view and the third party, synchronous height, visual angle and precision of the three-dimensional view are consistent while unified operation is achieved, and a smoother demonstration effect is displayed.
Of course, it is not necessary for any product in which the invention is practiced to achieve all of the above-described advantages at the same time.
Drawings
In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings used in the description of the embodiments will be briefly introduced 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 that other drawings can be obtained according to the drawings without creative efforts.
FIG. 1 is a flow chart of a WebGL-based three-dimensional view synchronous fusion non-invasive integration technique method 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.
Examples
Referring to fig. 1, a non-invasive integration technique method based on WebGL three-dimensional view synchronous fusion includes the following steps:
the method comprises the following steps: carrying out scene visualization information lightweight processing:
s1: model decomposition extraction method
S101: analyzing the recognition object: the method comprises the following steps of automatically identifying CIM model elements such as buildings, roads, greenery, water systems, small products and the like, and entity elements such as building internal structures, equipment implementation, pipeline pipelines, sensors and the like through a primary SDK development program tool of a model file; CIM model characteristics, such as model organization characteristics of points, lines, surfaces, arcs and the like;
s102: and (3) decomposing the object: decomposing the model through a model organization standard according to the recognition result, and generating a set of model standard library after decomposition processing;
s103: object extraction: extracting a model object which is mainly concerned by a user and is related to application management according to a model extraction standard and an AI algorithm;
s2: data cleaning method
S201: and (3) making a cleaning rule: formulating a set of CIM model cleaning rules, including geometric primitive filter gauge
Then, topology rules, pruning rules, priority rules, etc.;
s202: and (3) checking model data: the data is examined and checked, so that repeated information, topological errors, redundant information and the like are checked, the consistency of the data is checked, a problem examination report is generated, and a corresponding object can be searched according to a problem record;
s203: model data cleaning: selecting data to clean according to the problem inspection report, cleaning all problematic model elements and characteristics, and selecting cleaning items in a targeted manner during cleaning to keep objects which are not cleaned;
s3: the model geometric optimization method comprises the following steps: the method adopts a 'geometric transformation' technology, the final purpose of geometric transformation is to reduce the number of the model surfaces, the traditional geometric model is a static model, and a 'dynamic' model can be realized by 'geometric transformation' optimization to realize intelligent expression of the model;
the optimization mode is that the static geometric primitives realize 'dynamic' through the modes of parametric geometric description and triangularization geometric description, the parametric geometric description describes a geometric body by using a plurality of parameters, and the triangularization geometric description describes a geometric body by using a plurality of triangles;
s4: model fusion method
S401: and (3) fusion rule formulation: a set of fusion rules is formulated according to model organization standards, a fused model category is specified, and fusion affiliation of each object, primitive and element is set, namely, which objects are fused together is specified;
s402: model fusion: the method comprises the steps of performing fusion processing on a model by adopting an intelligent fusion technology according to a fusion rule, merging related objects, deleting redundancy and repetition in the fusion process, and only keeping one edge and one surface after fusion if a plurality of objects share the same edge or surface, so as to reduce the number of surfaces of the model;
s5: the model grading rendering method comprises the following steps: by adopting a model rendering technology, multiple LODs (levels of detail) are adopted for model display to accelerate the single-image rendering speed, the multiple LODs represent objects by geometric bodies of different levels, and the more distant the loaded model is, the coarser the model is, the more close the loaded model is, the finer the model is, so that the display efficiency is improved and the storage is reduced on the premise of not influencing the visual effect;
step two: and (3) message transfer station:
s6: acquiring operation information: obtaining operation information of a mouse through a native technology of a three-dimensional scene, wherein the mouse operation generally comprises operation information such as clicking, translation, zooming, dragging and rotating and the like;
s7: analyzing the obtained operation information: receiving operation information at a background, performing operation analysis on the operation information, and integrating the operation information into a format capable of processing and receiving a three-dimensional scene through code logic analysis;
s8: distributing the analyzed operation information to a three-dimensional scene: the analyzed information is returned to the three-dimensional scene in a message transmission mode;
s9: the three-dimensional scene receiving information executing operation: the three-dimensional scene receives the returned information after analysis, and then the returned information is analyzed and identified through the self-contained function, wherein the returned information is different, and the executed operation is different; the received information of the three-dimensional views with different front ends is the same, but the internal analysis of the three-dimensional views is different at that time, and the three-dimensional views analyze the received information by means of the internal analysis mode of the three-dimensional views so as to identify and execute the operation, thus realizing the effect of synchronously fusing the three-dimensional views and integrating the non-invasive integration, and displaying the scene information with the same height, view angle and precision.
One specific application of this embodiment is: the invention has reasonable design, can provide hardware 3D accelerated rendering for H5 through WebGL technology, enables Web developers to display three-dimensional scenes and models more smoothly in a browser by means of a system display card, can also create complex navigation and data visualization, avoids the trouble of developing special rendering plug-ins for webpages, firstly processes the three-dimensional models in a 'scene visualization information lightweight processing' mode, renders the scenes under the Web, then executes interactive operation in the browser, issues messages to a model view through a 'information transfer station' processing mode, and the model view immediately receives analysis messages and responds to the operation by utilizing the own processing function, thereby achieving the non-intrusive integration technology based on the synchronous fusion of the WebGL three-dimensional views;
the technical goals of lightweight loading and efficient rendering of the city information model data are achieved by analyzing the file format of CIM city information model data based on a WebGL technology, decomposing and extracting visual elements and characteristic information, cleaning the model data, hierarchically layering the model, geometrically expressing and optimizing the elements and reasonably combining space elements.
In the description herein, references to the description of "one embodiment," "an example," "a specific example" or the like are intended to mean that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the invention. In this specification, the schematic representations of the terms used above do not necessarily refer to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples.
The preferred embodiments of the invention disclosed above are intended to be illustrative only. The preferred embodiments are not intended to be exhaustive or to limit the invention to the precise embodiments disclosed. Obviously, many modifications and variations are possible in light of the above teaching. The embodiments were chosen and described in order to best explain the principles of the invention and the practical application, to thereby enable others skilled in the art to best utilize the invention. The invention is limited only by the claims and their full scope and equivalents.
Claims (10)
1. A non-invasive integration technical method based on WebGL three-dimensional view synchronous fusion is characterized in that: the method comprises the following steps:
the method comprises the following steps: carrying out scene visualization information lightweight processing:
s1: a model decomposition extraction method;
s2: a data cleaning method;
s3: a model geometric optimization method;
s4: a model fusion method;
s5: a model hierarchical rendering method;
step two: and (3) message transfer station:
s6: acquiring operation information;
s7: analyzing the obtained operation information;
s8: distributing the analyzed operation information to a three-dimensional scene;
s9: the three-dimensional scene receives the information and performs an operation.
2. The WebGL-based three-dimensional view synchronous fusion non-invasive integration technology method as claimed in claim 1, wherein the WebGL is characterized in that: the S1 includes S101: analyzing the recognition object: the method comprises the following steps of automatically identifying CIM model elements such as buildings, roads, greenery, water systems, small products and the like, and entity elements such as building internal structures, equipment implementation, pipeline pipelines, sensors and the like through a primary SDK development program tool of a model file; CIM model characteristics, such as model organization characteristics of points, lines, surfaces, arcs and the like; s102: and (3) decomposing the object: decomposing the model through a model organization standard according to the recognition result, and generating a set of model standard library after decomposition processing; s103: object extraction: and extracting the model objects which are mainly concerned by the user and are related to the application management according to the model extraction standard and the AI algorithm.
3. The WebGL-based three-dimensional view synchronous fusion non-invasive integration technology method as claimed in claim 1, wherein the WebGL is characterized in that: the S2 includes S201: and (3) making a cleaning rule: formulating a set of CIM model cleaning rules, including geometric primitive filtering rules, topological rules, deletion rules, priority rules and the like; s202: and (3) checking model data: the data is examined and checked, so that repeated information, topological errors, redundant information and the like are checked, the consistency of the data is checked, a problem examination report is generated, and a corresponding object can be searched according to a problem record; s203: model data cleaning: according to the problem inspection report, data are selected for cleaning, all problematic model elements and characteristics are cleaned, cleaning items can be selected in a targeted mode during cleaning, and objects which are not cleaned are reserved.
4. The WebGL-based three-dimensional view synchronous fusion non-invasive integration technology method as claimed in claim 1, wherein the WebGL is characterized in that: in S3, a "geometric transformation" technique is used, where the final objective of geometric transformation is to reduce the number of model surfaces, the conventional geometric model is a static model, and a "dynamic" model can be realized by "geometric transformation" optimization to realize intelligent expression of the model, where the optimization is to realize "dynamic" on a static geometric primitive in a manner of parametric geometric description and triangularization geometric description, where the parametric geometric description describes a geometric object with multiple parameters, and the triangularization geometric description describes a geometric object with multiple triangles.
5. The WebGL-based three-dimensional view synchronous fusion non-invasive integration technology method as claimed in claim 1, wherein the WebGL is characterized in that: the S4 includes S401: and (3) fusion rule formulation: a set of fusion rules is formulated according to model organization standards, a fused model category is specified, and fusion affiliation of each object, primitive and element is set, namely, which objects are fused together is specified; s402: model fusion: the intelligent fusion technology is adopted, the model is fused according to the fusion rule, the related objects are merged, redundancy and repetition are deleted in the fusion process, if a plurality of objects share a common edge or surface, only one edge or surface is reserved after fusion, and the number of the surfaces of the model is reduced.
6. The WebGL-based three-dimensional view synchronous fusion non-invasive integration technology method as claimed in claim 1, wherein the WebGL is characterized in that: in S5, a "model rendering" technique is used, multiple LODs (levels of detail) are used for model display, the rendering speed of a single image element is accelerated, the multiple LODs represent objects by geometric objects of different levels, and a loaded model is coarser the farther away, and finer the closer the model, so as to improve the display efficiency and reduce the storage on the premise of not affecting the visual effect.
7. The WebGL-based three-dimensional view synchronous fusion non-invasive integration technology method as claimed in claim 1, wherein the WebGL is characterized in that: in S6, the operation information of the mouse is obtained through the native technology of the three-dimensional scene, and the mouse operation generally includes operation information such as clicking, translation, zooming, dragging, and rotating.
8. The WebGL-based three-dimensional view synchronous fusion non-invasive integration technology method as claimed in claim 1, wherein the WebGL is characterized in that: in S7, the operation information is received in the background, and the operation information is analyzed and integrated into a format that the three-dimensional scene can process and receive through code logic analysis.
9. The WebGL-based three-dimensional view synchronous fusion non-invasive integration technology method as claimed in claim 1, wherein the WebGL is characterized in that: in S8, the analyzed information is returned to the three-dimensional scene in a message passing manner.
10. The WebGL-based three-dimensional view synchronous fusion non-invasive integration technology method as claimed in claim 1, wherein the WebGL is characterized in that: in the step S9, the three-dimensional scene receives the returned information after analysis, and then the returned information is analyzed and identified by the self-contained function, where the returned information is different and the executed operations are different; the received information of the three-dimensional views with different front ends is the same, but the internal analysis of the three-dimensional views is different at that time, and the three-dimensional views analyze the received information by means of the internal analysis mode of the three-dimensional views so as to identify and execute the operation, thus realizing the effect of synchronously fusing the three-dimensional views and integrating the non-invasive integration, and displaying the scene information with the same height, view angle and precision.
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Application publication date: 20210709 |