CN102279752B - Device and method for rendering ultra-large scene in real time based on Web three-dimension (3D) - Google Patents
Device and method for rendering ultra-large scene in real time based on Web three-dimension (3D) Download PDFInfo
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Abstract
The invention discloses a device for rendering an ultra-large scene in real time and relates to a device and a method for transmitting and loading data. The device comprises a data transmission part and a data rendering part, wherein the data transmission part comprises a structural conversion device, a serialization device and a server thread management device; and the data rendering part comprises a client data loading device and a dynamic display management device. By the device, a user no longer needs to wait for a long time during the accessing of a Web 3D application program, and the 3D application program cannot be seriously limited by network bandwidth during propagation on web; during the deployment and embodiment of the Web 3D application program, the incompatibility of early terminals, having lower hardware configuration, of a user group can be ignored, and the feasibility and practicability of the Web 3D application program are greatly improved. Meanwhile, the invention provides a method for rendering by using the device.
Description
Technical field
The present invention relates to data transmission charger and method, particularly relate to the apparatus and method that the ultra-large scene data real-time loading based on Web3D is played up.
Background technology
As is known, in today of internet fast development, 3D graph technology (Web3D) on internet reaches its maturity, and in fields such as visual, the education of ecommerce, online amusement and leisure and game, science and technology and engineering, medical science, geography information, virtual communities, has a extensive future.But there is two fatefulue factors, i.e. the real-time rendering speed of the network bandwidth and subscription client in the Web3D application development based on B/S pattern (being browser and server architecture) in actual applications.
User will access, use a Web3D application program, the bottom graphic interface that client-side program need to call local operation system completes three-dimensional picture and plays up, if each with all needing to wait for that even tens minutes above time was waited for by network three-dimensional data was downloaded to this locality from server end a few minutes, and after having verified data integrity, start to play up, this application program is destined to lose user group so.Along with the fast development of cable and Fibre Optical Communication Technology, though having significantly, the network bandwidth promotes, for the three-dimensional data of the above ultra-large scene of file volume 100MB, transmission bandwidth is still the Main Bottleneck of restriction development.
The use of three-dimensional applications on user terminal, (OpenGL and Direct3D are professional graphical programming interfaces to the Direct3D of client support OpenGL or Microsoft, maximum difference is that Direct3D is that Microsoft's Windows system is exclusive, and OpenGL is across author language, cross-system platform) be the key realizing, Web3D and PC 3D are as broad as long in this, and the operational efficiency of OpenGL or Direct3D directly depends on the level of hardware of user terminal, there is high-end and problem low side hardware configuration in different user terminals, so want to meet the Web3D of BS pattern, be applied in smooth operation on the very different user terminal of magnanimity, outstanding Real-time Rendering Technology is very crucial.
Seemingly, the institutional framework of data is also that scene comprises each dvielement according to contacting progressively refinement between scene, element, object, attribute and object for the application of Web3D and Host Based 3D application class, and the characteristic of element defines the method that can complete; The object definition that belongs to same class element property has different three-dimensional properties, comprises the attributes such as position, shape, color, outward appearance; Each object also comprise and other objects between annexation, comprise the mutual motion state of object, triggering state, the characteristic relation between the inferior object of associated layers.
Summary of the invention
For above defect, the present invention seeks to the ultra-large scene application into Web3D, a kind of real-time rendering device is provided, solve the less technical matters that is not suitable with real-time rendering high request of transmission bandwidth.
The object of the invention is to provide a kind of method of utilizing this real-time rendering device, solves the slow problem of rendering speed.
Ultra-large scene real-time rendering device of the present invention comprises that tcp data segment and data play up part, tcp data segment comprises structure conversion equipment, serializing device, service end thread management device, data are played up part and are comprised client data charger, dynamically display management device;
Structure conversion equipment, the request according to client to scenario objects, is converted to JSON structure by the encapsulating structure of model of place response data;
Serializing device, for by the model of response data Scene and element object instantiation, is converted to independently data stream by the object of instantiation;
Service end thread management device, is used for distribution of flows to give different threads, realizes the concurrent transmission of each element object in model of place;
Client data charger, for by the element object of model of place at client real-time loading, realize Data Concurrent transmission and synchronize with situation elements loading procedure;
Dynamically display management device, for completing client real-time rendering, regulates client resource;
Wherein: structure conversion equipment comprises content compression device, irrelevant XML information data and the redundant data of data and contextual data for getting rid of JSON construction packages, comprises newline, space character, and tab, for the header file structure of platform compatibility;
Service end thread management device comprises priority management device, for the situation elements object to response data, classifies, and according to restoration scenario, priority need to be set;
Dynamically display management device comprises resource monitoring device, for the utilization factor of surveillance internal memory or video memory, is optimization system Resource Supply trigger condition.
Client data charger also comprises unserializing device, data extraction device, data loading device;
Unserializing device, for data stream being converted to the data of JSON construction packages, for the data stream of convert failed, sends serializing request again to serializing device;
Data extraction device, for extracting situation elements and object according to client-requested from the contextual data of JSON encapsulating structure;
Data loading device, to OpenGL or Direct3D, completes playing up of each object for real-time loading situation elements and object.
Service end thread management device also comprises thread distributor, for the data stream of serializing being passed to different threads according to client-requested priority, processes, and realizes data parallel and transmits.
Dynamically display management device also comprises scene level of detail management devices, according to the control signal of resource monitoring device, controls the visual field or the sighting distance of camera element and adjusts leg-of-mutton rendering effect and the pinup picture resolution that forms object in scene.
Dynamically display management device also comprises situation elements load/unload device, according to the control signal of resource monitoring device, and the visual field or the situation elements in sighting distance and the object of load or unload camera element from internal memory and video memory in real time.
Rendering intent based on ultra-large scene real-time rendering device of the present invention, its step comprises:
User proposes Web3D application request;
Structure converter device is converted to JSON structure by the encapsulating structure of service end model of place data;
Utilize content compression device to get rid of the redundant data irrelevant with contextual data;
By serializing device, by the element object instantiation in model of place, the object of instantiation is converted to independently data stream;
By priority management device, situation elements object is classified, according to restoration scenario, priority need to be set;
The data stream of serializing is passed to different threads by thread distributor and process, realize data parallel and transmit;
A, client, by the serializing data stream of different threads transmission, are converted to the data of JSON construction packages by unserializing device;
B, by data extraction device, from JSON structure, extract situation elements;
C, data loading device real-time loading situation elements;
Repeat a to c step, dynamically improve scene content.
Step also comprises:
By resource monitoring device, monitor client internal memory, the dynamic utilization factor of video memory;
When system availability reaches trigger condition, by scene level of detail management devices, reduce the rendering effect of triangular element or pass through the visual field of situation elements load/unload device unloading camera element or the less important situation elements in sighting distance;
When system loading is lighter, by scene level of detail management devices, improves the rendering effect of triangular element or load the visual field of camera element or the less important situation elements in sighting distance by situation elements load/unload device.
By the ultra-large scene real-time rendering device based on Web3D of the present invention, user accesses while using Web3D application program and needn't, again through the longer stand-by period, break through tri-dimensional application program and in internet, propagate the serious restriction that is subject to the network bandwidth; While disposing and implementing Web3D application, needn't worry user group's the lower terminal incompatibility of early stage hardware configuration, greatly promote feasibility and the practicality of Web3D application program.
Below in conjunction with specific embodiment, the invention will be further described.
Accompanying drawing explanation
Fig. 1 is the structural representation of ultra-large scene real-time rendering device of the present invention;
Fig. 2 is the service end Data Control schematic flow diagram of ultra-large scene real-time rendering device of the present invention;
Fig. 3 is that the client data of ultra-large scene real-time rendering device of the present invention is controlled schematic flow diagram.
Embodiment
As shown in Figure 1, ultra-large scene real-time rendering device based on Web3D of the present invention comprises that tcp data segment and data play up part, tcp data segment comprises structure conversion equipment 01, serializing device 02, service end thread management device 03, data are played up part and are comprised client data charger 04, dynamically display management device 05;
Structure conversion equipment 01, the request according to client to scenario objects, is converted to JSON structure by the encapsulating structure of model of place response data;
Serializing device 02, for by the model of response data Scene and element object instantiation, is converted to independently data stream by the object of instantiation;
Service end thread management device 03, is used for distribution of flows to give different threads, realizes the concurrent transmission of each element object in model of place;
Client data charger 04, for by the element object of model of place at client real-time loading, realize Data Concurrent transmission and synchronize with situation elements loading procedure;
Dynamically display management device 05, for completing client real-time rendering, regulates client resource.
Structure conversion equipment 01 comprises content compression device 011,
Content compression device 011, irrelevant XML information data and the redundant data of data and contextual data for getting rid of JSON construction packages, comprises newline, space character, tab, for header file structure of platform compatibility etc.
Service end thread management device 03 comprises priority management device 031, thread distributor 032;
Priority management device 031, classifies for the situation elements object to response data, according to restoration scenario, priority need to be set;
Thread distributor 032, processes for the data stream of serializing being passed to different threads according to client-requested priority, realizes data parallel and transmits.
Client data charger 04 comprises unserializing device 041, data extraction device 042, data loading device 043;
Unserializing device 041, for data stream being converted to the data of JSON construction packages, for the data stream of convert failed, sends serializing request again to serializing device 02;
Data extraction device 042, for extracting situation elements and object according to client-requested from the contextual data of JSON encapsulating structure;
Data loading device 043, to OpenGL or Direct3D, completes playing up of each object for real-time loading situation elements and object.
Dynamically display management device 05 comprises scene level of detail management devices 052, situation elements load/unload device 053, resource monitoring device 051;
Scene level of detail management devices 052, adjusts according to the visual field of camera element or sighting distance leg-of-mutton rendering effect and the pinup picture resolution that forms object in scene;
Situation elements load/unload device 053, the in real time visual field or the situation elements in sighting distance and the object of load or unload camera element from internal memory and video memory;
Resource monitoring device 051, for the utilization factor of surveillance internal memory or video memory, is optimization system Resource Supply trigger condition, be scene level of detail management devices 052, and situation elements load/unload device 053 provides adjusting parameter.
In application, 01 request of customer in response end to element in scene and object of structure conversion equipment, the situation elements data and target data-mapping of the request with the encapsulation of XML form is generated to the JSON encapsulation format of lightweight more, by content compression device 011, XML information filtering in JSON encapsulation format data is fallen, and get rid of redundant information as space character, carriage return character, control character and platform compatible information header file that tab and other and contextual data are irrelevant.JSON (JavaScript Object Notation) is a subset based on JavaScript (Standard ECMA-262 3rd Edition-December 1999), employing is totally independent of the text formatting of language,, make that JSON is the same with XML becomes desirable exchanges data language.JSON to as if unordered " ' name/value ' a to " set.An object finishes with " { " (left parenthesis) starts, " } " (right parenthesis).": " (colon) of each " title " heel; Between " ' name/value ' to ", use ", " (comma) to separate; Array is the ordered set of value (value), and an array finishes with " [" (left bracket) starts, "] " (right bracket), uses ", " (comma) to separate between value; Value (value) can be character string (string), numerical value (number), ture, false, null, object (object) or the array (array) that double quotation marks brackets, and these structures can be nested; Character string (string) is the set of any amount Unicode character that surrounded by double quotation marks, uses backslash escape, and a character (character) is i.e. an independent character string (character string).JSON structure just can be used packed data in different development environments through simple conversion, alleviated the loading level of exchanges data, has promoted data utilization ratio.Three-dimensional data is after the compression of above two steps is processed, and the volume of element and object can be down to 1 ‰～1% of original, is useful in very much transmission over networks.
Priority management device 031 is pressed the request of data of client the quantity of element or object, and complexity and the annexation between object of model are labeled as different priority levels.Serializing device 02, according to priority level, carries out serializing to the model in JSON data, element or object, by the situation elements object-instantiated of client demand, and instance object is converted to independently data stream.By thread distributor 032, be the more processing threads of distribution of flows that priority is high, a plurality of thread parallels are processed, preferentially read this data stream, realize concurrent transmission and download for the request of data of one or more clients.Meanwhile, the feedback of priority management device 031 customer in response end data charger 04, guarantees that the data stream of failed download can obtain priority processing, again transmission.
Client data charger 04 is converted to data stream by unserializing device 041 data of standard JSON encapsulating structure, once this process failure, unserializing device 041 will be to priority management device 031 feedback retransmission information.Each JSON structured data through 041 conversion of unserializing device forms service end response data, and data extraction device 042 therefrom extracts the response data of client-requested in real time.Data loading device 043 is immediately loaded on render engine by response data and completes render process.
In three-dimensional scenic render process, the real-time loading of asynchronous arrival response data, after making user login scene, just can start to watch and control, data loading device 043 can load current untapped situation elements and object automatically on backstage, model in scene and object can be written into the visual field in turn, gradual perfection scene content, has avoided client factor data wait for and cause and serve overtime reporting an error.
After user logins three-dimensional scenic, start to watch and control, dynamically display management device 05 can load current untapped scene automatically on backstage, and model can sequentially be written into the visual field.For super large three-dimensional scenic graph data, utilize resource monitoring device 051, scene level of detail management devices 052, situation elements load/unload device 053, realizes the real-time rendering ability of user terminal to scene that maximize.Resource monitoring device 051 monitors the utilization factor of client internal memory or video memory, sets trigger condition, and feed back to scene level of detail management devices 052 and situation elements load/unload device 053 by 30%, 50%, 60% and 80% of utilization factor.Make scene level of detail management devices 052 adjust the topographic details that Web3D applications client generates, according to the distance of triangular facet and camera distance, automatically determine the triangle display level (density) that forms scenario objects, closely triangular facet density in ground is large, remote density is little, thereby saved resource overhead, and don't affected the rendering effect of picture; By situation elements load/unload device, object model in three-dimensional swap data is carried out to the visual adjustment of seeing scope, Web3D applications client program realizes and directly internal storage data being operated, the object that dynamic load comes into view, shared internal memory and the video memory resource of element, object model in the visual field left in unloading, thereby guarantees that internal memory, video memory occupancy are a lower level.
As shown in Figure 2, utilize real-time rendering device of the present invention to carry out the using method that ultra-large scene is played up, step comprises:
User proposes Web3D application request;
Structure converter device 01 is converted to JSON structure by the encapsulating structure of service end model of place data;
Utilize content compression device 011 to get rid of the redundant data irrelevant with contextual data;
By serializing device 02, by the element object instantiation in model of place, the object of instantiation is converted to independently data stream;
By priority management device 031, situation elements object is classified, according to restoration scenario, priority need to be set;
The data stream of serializing is passed to different threads by thread distributor 032 and process, realize data parallel and transmit;
A, client, by the serializing data stream of different threads transmission, are converted to the data of JSON construction packages by unserializing device 041;
B, by data extraction device 042, from JSON structure, extract situation elements;
C, data loading device 043 real-time loading situation elements;
Repeat a to c step, dynamically improve scene content.
As shown in Figure 3, utilize real-time rendering device of the present invention to carry out the using method that ultra-large scene is played up, step comprises:
By resource monitoring device 051, monitor client internal memory, the dynamic utilization factor of video memory;
When system availability reaches trigger condition, by scene level of detail management devices 052, reduce the rendering effect of triangular element or unload the visual field of camera element or the less important situation elements in sighting distance by situation elements load/unload device 053;
When system loading is lighter, by scene level of detail management devices 052, improves the rendering effect of triangular element or load the visual field of camera element or the less important situation elements in sighting distance by situation elements load/unload device 053.
Above-described embodiment is described the preferred embodiment of the present invention; not scope of the present invention is limited; design under the prerequisite of spirit not departing from the present invention; various distortion and improvement that those of ordinary skills make technical scheme of the present invention, all should fall in the definite protection domain of the claims in the present invention book.
Claims (7)
1. a ultra-large scene real-time rendering device, comprise that tcp data segment and data play up part, tcp data segment comprises structure conversion equipment (01), serializing device (02), service end thread management device (03), data are played up part and are comprised client data charger (04), dynamically display management device (05);
Structure conversion equipment (01), the request according to client to scenario objects, is converted to JSON structure by the encapsulating structure of model of place response data;
Serializing device (02), for by the model of response data Scene and element object instantiation, is converted to independently data stream by the object of instantiation;
Service end thread management device (03), is used for distribution of flows to give different threads, realizes the concurrent transmission of each element object in model of place;
Client data charger (04), for by the element object of model of place at client real-time loading, realize Data Concurrent transmission and synchronize with situation elements loading procedure;
Dynamically display management device (05), for completing client real-time rendering, regulates client resource;
It is characterized in that: structure conversion equipment (01) comprises content compression device (011), for the data of getting rid of JSON construction packages and contextual data irrelevant XML information data and redundant data, comprise newline, space character, tab, for the header file structure of platform compatibility;
Service end thread management device (03) comprises priority management device (031), for the situation elements object to response data, classifies, and according to restoration scenario, priority need to be set;
Dynamically display management device (05) comprises resource monitoring device (051), for the utilization factor of surveillance internal memory or video memory, is optimization system Resource Supply trigger condition.
2. ultra-large scene real-time rendering device as claimed in claim 1, is characterized in that: client data charger (04) comprises unserializing device (041), data extraction device (042), data loading device (043);
Unserializing device (041), for data stream being converted to the data of JSON construction packages, for the data stream of convert failed, sends serializing request again to serializing device (02);
Data extraction device (042), for extracting situation elements and object according to client-requested from the contextual data of JSON encapsulating structure;
Data loading device (043), to OpenGL or Direct3D, completes playing up of each object for real-time loading situation elements and object.
3. ultra-large scene real-time rendering device as claimed in claim 2, it is characterized in that: service end thread management device (03) comprises thread distributor (032), for the data stream of serializing being passed to different threads according to client-requested priority, process, realize data parallel and transmit.
4. ultra-large scene real-time rendering device as claimed in claim 3, it is characterized in that: dynamically display management device (05) comprises scene level of detail management devices (052), according to the control signal of resource monitoring device (051), control the visual field or the sighting distance of camera element and adjust leg-of-mutton rendering effect and the pinup picture resolution that forms object in scene.
5. ultra-large scene real-time rendering device as claimed in claim 4, it is characterized in that: dynamically display management device (05) comprises situation elements load/unload device (053), according to the control signal of resource monitoring device (051), the in real time visual field or the situation elements in sighting distance and the object of load or unload camera element from internal memory and video memory.
6. utilize ultra-large scene real-time rendering device described in claim 5 to carry out the method that the ultra-large scene based on Web3D is played up, its step comprises:
User proposes Web3D application request;
Structure conversion equipment (01) is converted to JSON structure by the encapsulating structure of service end model of place data;
Utilize content compression device (011) to get rid of the redundant data irrelevant with contextual data;
By serializing device (02), by the element object instantiation in model of place, the object of instantiation is converted to independently data stream;
By priority management device (031), situation elements object is classified, according to restoration scenario, priority need to be set;
The data stream of serializing is passed to different threads by thread distributor (032) and process, realize data parallel and transmit;
A, client, by the serializing data stream of different threads transmission, are converted to the data of JSON construction packages by unserializing device (041);
B, by data extraction device (042), from JSON structure, extract situation elements;
C, data loading device (043) real-time loading situation elements;
Repeat a to c step, dynamically improve scene content.
7. utilize as claimed in claim 6 ultra-large scene real-time rendering device to carry out the method that the ultra-large scene based on Web3D is played up, its step also comprises:
By resource monitoring device (051), monitor client internal memory, the dynamic utilization factor of video memory;
When system availability reaches trigger condition, by scene level of detail management devices (052), reduce the rendering effect of triangular element or unload the visual field of camera element or the less important situation elements in sighting distance by situation elements load/unload device (053);
When system loading is lighter, by scene level of detail management devices (052), improves the rendering effect of triangular element or load the visual field of camera element or the less important situation elements in sighting distance by situation elements load/unload device (053).
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| CN102930374B (en) * | 2012-09-27 | 2015-11-04 | 乐华建科技（北京）有限公司 | A kind of system using three-dimensional model simulating reality to carry out project management |
| CN103021023A (en) * | 2012-12-05 | 2013-04-03 | 上海创图网络科技发展有限公司 | Three-dimensional scene construction method based on browser |
| CN103077239B (en) * | 2013-01-10 | 2016-01-20 | 上海电力学院 | Based on the iFrame embedded Web 3D system that cloud is played up |
| CN103310021B (en) * | 2013-07-04 | 2016-11-16 | 江西交通咨询公司 | A kind of model dynamic loading method based on three-dimensional coordinate interchange |
| CN103729558A (en) * | 2013-12-26 | 2014-04-16 | 北京像素软件科技股份有限公司 | Scene change method |
| CN104183006A (en) * | 2014-09-05 | 2014-12-03 | 国家电网公司 | Dynamic mapping method based on Web3D model |
| CN104410667B (en) * | 2014-10-31 | 2017-12-12 | 北京思特奇信息技术股份有限公司 | Conversion method and system of a kind of XML message to JSON messages |
| CN106293495A (en) * | 2015-05-22 | 2017-01-04 | 中兴通讯股份有限公司 | The date storage method of terminal unit and terminal unit |
| CN106254489A (en) * | 2016-08-16 | 2016-12-21 | 王淼 | A kind of cloud rendering system without file transmission and method thereof |
| CN113721908B (en) * | 2021-08-30 | 2024-03-22 | 湖南快乐阳光互动娱乐传媒有限公司 | Unlimited cascade component rendering method and device |
| CN117854518A (en) * | 2024-03-05 | 2024-04-09 | 深圳市时代经纬科技有限公司 | Method and device for realizing voice encoding and decoding and transcoding by WebGPU |
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