CN107170040A - A kind of three-dimensional bridge scenario building method and apparatus - Google Patents
A kind of three-dimensional bridge scenario building method and apparatus Download PDFInfo
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Abstract
The embodiment of the present invention provides a kind of three-dimensional bridge scenario building method and apparatus, obtains the environmental data around the structured data and bridge of bridge, and the modeling data of bridge environment is obtained after being pre-processed to the environmental data around bridge.Then the three-dimensional scene models of bridge environment are set up according to the modeling data of bridge environment, and set up according to the structured data of bridge the threedimensional model of bridge.Finally the threedimensional model of the three-dimensional scene models of bridge environment and bridge is fitted and shown.In the embodiment of the present invention, by setting up the three-dimensional scene models of bridge environment and the threedimensional model of bridge, and the threedimensional model of the three-dimensional scene models of bridge environment and bridge is subjected to the three-dimensional bridge scene of laminating structure, obtained three-dimensional bridge scene can both show the complicated spatial structural form of bridge, also the environmental information on bridge periphery can be shown, so as to contribute to bridge maintenance personnel to set up bridge maintenance scheme according to the actually located environment of bridge.
Description
Technical field
The present embodiments relate to technical field of transportation, more particularly to a kind of three-dimensional bridge scenario building method and apparatus.
Background technology
Bridge on highway is the emphasis monitoring object of maintenance department, because it is by environment, overload, artificial, material itself
Performance degradation, the management and maintenance influence of factor such as in place not in time, bridge structure each several part are being far from reaching design period just
Produce different degrees of damage and deterioration.Traditional bridge methods of exhibiting is shown in dots on two-dimensional map,
And bridge has Complicated Spatial Structure, in two-dimensional map, the spatial information of bridge and the environmental information on bridge periphery all can not
Displaying, it is impossible to carry out the positioning of bridge defect position, it is impossible to which in bridge operation management, personnel provide aid decision for bridge maintenance
Support.
At present, the three-dimensional scenic exhibition scheme of common bridge is making simply three-dimensional bridge model, and only bridge
Beam, bridge space information loses serious, the environmental information without bridge periphery.This method cost is low, but interactive experience is poor, only
It is schematic diagram, it is impossible to play a part of maintenance aid decision and support.
The content of the invention
The embodiment of the present invention provides a kind of three-dimensional bridge scenario building method and apparatus, three-dimensional in the prior art for solving
The problem of lacking bridge surrounding enviroment information in bridge scene.
The embodiments of the invention provide a kind of three-dimensional bridge scenario building method, including：
Obtain the environmental data around the structured data and the bridge of bridge；
The modeling data of bridge environment is obtained after being pre-processed to the environmental data around the bridge；
The three-dimensional scene models of the bridge environment are set up according to the modeling data of the bridge environment, and according to the bridge
The structured data of beam sets up the threedimensional model of the bridge；
The threedimensional model of the three-dimensional scene models of the bridge environment and the bridge is fitted and shown.
Alternatively, the modeling number of bridge environment is obtained after the environmental data to around the bridge is pre-processed
According to, including：
Re-projection data are obtained after environmental data around the bridge is projected again；
Re-projection data progress Data Format Transform is determined into format into object format data；
The format into object format data is subjected to the modeling data that three dimensional space coordinate mapping determines bridge environment.
Alternatively, it is described that the format into object format data is subjected to the modeling number that three dimensional space coordinate mapping determines bridge environment
According to, including：
According to the first mapping ratio by after format into object format data progress plane coordinates mapping, reflected according to described first
Penetrate ratio and the modeling data that elevation coordinate mapping determines bridge environment is carried out to the format into object format data；Or
According to first mapping ratio by the format into object format data carry out plane coordinates mapping after, according to default fixation
Mapping ratio carries out the modeling data that elevation coordinate mapping determines bridge environment to the format into object format data.
Alternatively, the modeling data according to the bridge environment sets up the three-dimensional scene models of the bridge environment,
Including：
Bridge environment model object is built according to the modeling data of the bridge environment；
Display optimization is carried out to the bridge environment model object；
Bridge environment model object after optimization is subjected to the three-dimensional scenic mould that texture renders and maps determination bridge environment
Type.
Alternatively, the threedimensional model by the three-dimensional scene models of the bridge environment and the bridge is fitted simultaneously
Displaying, including：
The ratio of the threedimensional model of the bridge is adjusted according to the three-dimensional scene models of the bridge environment；
The threedimensional model of bridge after the three-dimensional scene models of the bridge environment and adjustment ratio is fitted and divided
Section loading displaying.
Correspondingly, the embodiment of the present invention additionally provides a kind of three-dimensional bridge scenario building device, including：
Acquisition module, the environmental data around structured data and the bridge for obtaining bridge；
Processing module, the modeling number for obtaining bridge environment after being pre-processed to the environmental data around the bridge
According to；The three-dimensional scene models of the bridge environment are set up according to the modeling data of the bridge environment, and according to the bridge
Structured data sets up the threedimensional model of the bridge；By the three-dimensional scene models of the bridge environment and the three-dimensional mould of the bridge
Type is fitted and shown.
Alternatively, the processing module specifically for：
Re-projection data are obtained after environmental data around the bridge is projected again；
Re-projection data progress Data Format Transform is determined into format into object format data；
The format into object format data is subjected to the modeling data that three dimensional space coordinate mapping determines bridge environment.
Alternatively, the processing module specifically for：
According to the first mapping ratio by after format into object format data progress plane coordinates mapping, reflected according to described first
Penetrate ratio and the modeling data that elevation coordinate mapping determines bridge environment is carried out to the format into object format data；Or
According to first mapping ratio by the format into object format data carry out plane coordinates mapping after, according to default fixation
Mapping ratio carries out the modeling data that elevation coordinate mapping determines bridge environment to the format into object format data.
Alternatively, the processing module specifically for：
Bridge environment model object is built according to the modeling data of the bridge environment；
Display optimization is carried out to the bridge environment model object；
Bridge environment model object after optimization is subjected to the three-dimensional scenic mould that texture renders and maps determination bridge environment
Type.
Alternatively, the processing module specifically for：
The ratio of the threedimensional model of the bridge is adjusted according to the three-dimensional scene models of the bridge environment；
The threedimensional model of bridge after the three-dimensional scene models of the bridge environment and adjustment ratio is fitted and divided
Section loading displaying.
The embodiment of the present invention shows, the environmental data around the structured data and the bridge of bridge is obtained, to the bridge
Environmental data around beam obtains the modeling data of bridge environment after being pre-processed.Then according to the modeling of the bridge environment
Data set up the three-dimensional scene models of the bridge environment, and set up according to the structured data of the bridge three-dimensional of the bridge
Model.Finally the threedimensional model of the three-dimensional scene models of the bridge environment and the bridge is fitted and shown.This hair
In bright embodiment, according to the environmental data around the structured data and bridge of bridge set up bridge environment three-dimensional scene models and
After the threedimensional model of bridge, the threedimensional model of the three-dimensional scene models of bridge environment and bridge is subjected to laminating and builds three-dimensional bridge
Scene, the three-dimensional bridge scene can both show the complicated spatial structural form of bridge, can also show the environment on bridge periphery
Information, so as to contribute to bridge maintenance personnel to set up bridge maintenance scheme according to the actually located environment of bridge.
Brief description of the drawings
Technical scheme in order to illustrate the embodiments of the present invention more clearly, makes required in being described below to embodiment
Accompanying drawing is briefly introduced, it should be apparent that, drawings in the following description are only some embodiments of the present invention, for this
For the those of ordinary skill in field, without having to pay creative labor, it can also be obtained according to these accompanying drawings
His accompanying drawing.
Fig. 1 is a kind of schematic flow sheet of three-dimensional bridge scenario building method provided in an embodiment of the present invention；
Fig. 2 is the schematic flow sheet of the environmental data preprocess method around bridge provided in an embodiment of the present invention；
Fig. 3 is the schematic flow sheet of the three-dimensional scene models of structure bridge environment provided in an embodiment of the present invention；
Fig. 4 is UV coordinates schematic diagram provided in an embodiment of the present invention；
Fig. 5 is the schematic flow sheet of another three-dimensional bridge scenario building method provided in an embodiment of the present invention；
Fig. 6 is a kind of structural representation of three-dimensional bridge scenario building device provided in an embodiment of the present invention.
Embodiment
In order that the purpose of the present invention, technical scheme and beneficial effect are more clearly understood, below in conjunction with accompanying drawing and implementation
Example, the present invention will be described in further detail.It should be appreciated that specific embodiment described herein is only to explain this hair
It is bright, it is not intended to limit the present invention.
Fig. 1 illustrates a kind of flow of three-dimensional bridge scenario building method provided in an embodiment of the present invention, the stream
Journey can be performed by three-dimensional bridge scenario building device.
As shown in figure 1, the specific steps of the flow include：
Step S101, obtains the environmental data around the structured data and bridge of bridge.
Step S102, obtains the modeling data of bridge environment after being pre-processed to the environmental data around bridge.
Step S103, the three-dimensional scene models of bridge environment are set up according to the modeling data of bridge environment, and according to bridge
Structured data set up the threedimensional model of bridge.
Step S104, the threedimensional model of the three-dimensional scene models of bridge environment and bridge is fitted and shown.
Specifically, the environmental data around bridge can derive from Google satellite image data, can also be from boat
Its rebecca mapping mission digital elevation model (Shuttle Radar Topography Mission Digital
Elevation Model, abbreviation SRTM DEM) data.The structured data of bridge can derive from the drawing of bridge construction.In structure
Build bridge environment three-dimensional scene models and bridge threedimensional model when, can be by web graph shape storehouse (Web Graphics
Library, abbreviation WebGL), GIS-Geographic Information System (Geographic Information System, GIS) platform,
The Modeling Platforms such as SuperMap, 3Dmax.In the embodiment of the present invention, according to the environment number around the structured data and bridge of bridge
After the three-dimensional scene models and the threedimensional model of bridge for setting up bridge environment, by the three-dimensional scene models and bridge of bridge environment
Threedimensional model carry out laminating and build three-dimensional bridge scene, the three-dimensional bridge scene can both show the complicated space structure of bridge
Information, can also show the environmental information on bridge periphery, so as to contribute to bridge maintenance personnel according to the actually located ring of bridge
Bridge maintenance scheme is set up in border, and the satellite image data and SRTM dem datas of Google Maps are the disclosures of Free Online in addition
Resource, WebGL is the three-dimensional display technology increased income, and the embodiment of the present invention utilizes WebGL skills using SRTM dem datas as data source
Art builds the construction cost that three-dimensional bridge scene reduces three-dimensional scenic.
In specific implementation, because different Modeling Platforms has different to the form and spatial frame of reference of modeling data
It is required that, therefore before modeling, the environmental data around the bridge of acquisition need to be pre-processed according to different platforms, specific bag
Following steps are included, as shown in Figure 2：
Step S201, obtains re-projection data after the environmental data around bridge is projected again.
Step S202, format into object format data is determined by re-projection data progress Data Format Transform.
Step S203, the modeling data that three dimensional space coordinate mapping determines bridge environment is carried out by format into object format data.
The process pre-processed to the environmental data around bridge is discussed in detail by taking a kind of Modeling Platform as an example below, if
The fixed three-dimensional scenic based on WebGL technique construction bridge environments, network geographic information system (Web Geographic
Information System, abbreviation WebGIS) spatial frame of reference of service is European petroleum exploration tissue (European
Petroleum Survey Group, abbreviation EPSG):The spatial frame of reference of 3857, SRTM dem datas is ESPG:4326, by
It is different in the spatial frame of reference and the spatial frame of reference of SRTM dem datas of Web GIS service, therefore need to SRTM dem datas
Re-projection is carried out, is ESPG by SRTM dem datas re-projection:3857 spatial frame of reference.Specifically, ESPG:4326 georeferencings
System and EPSG:Shown in the Coordinate Conversion of 3857 spatial frame of reference such as formula (1)：
Wherein, λ,To put in ESPG:The Circular measure coordinate that 4326 spatial frame of reference Coordinate Conversions are, X, Y are that point exists
ESPG:3857 spatial frame of reference coordinates, R is terrestrial equator radius.
Further, the data format of SRTM dem datas is GeoTiff forms, because network front end can not be to SRTM
Dem data form is identified, therefore needs to enter SRTM dem datas row format conversion.In specific implementation, first by SRTM
The pixel cell of each in dem data is extracted with the textual form of XYZ coordinate.Due to pixel cell in SRTM dem datas
Size is the same, interval is equal, in the case where survey region is certain, and the specific number of ranks is, it is known that according to SRTM DEM numbers
According to starting point coordinate, any one unit XY coordinates can be extrapolated, therefore the embodiment of the present invention is extracting the XY of pixel cell
Data compression can be carried out after coordinate by the way of the XY coordinates of omitted data.Secondly the Z values for SRTM dem datas are asked
Topic, SRTM dem datas using being converted into being solved by the way of raster file format by the embodiment of the present invention, by SRTM DEM
The Z values of data are converted into a simple binary file and two textual form header files, header file and record SRTM
The relevant parameter of dem data, simple binary file is Z value byte streams, the binary file after conversion with it is original
GeoTiff formatted file sizes are consistent.
SRTM dem datas are carried out after Data Format Transform, the format into object format data being converted to is subjected to three-dimensional space
Between coordinate mapping determine bridge environment modeling data, three dimensional space coordinate mapping specifically includes following two methods：
Method one, according to first mapping ratio by format into object format data carry out plane coordinates mapping after, reflected according to first
Penetrate ratio and the modeling data that elevation coordinate mapping determines bridge environment is carried out to format into object format data.
Specifically, the first mapping ratio is first according to by ESPG:XY coordinates are mapped to three-dimensional space in 3857 spatial frame of reference
Between on x/y plane in coordinate system, wherein the first mapping ratio and EPSG:Mapping range and three-dimensional under 3857 space coordinates
The mapping range of x/y plane in space coordinates is relevant, sets three-dimensional coordinate system subsequent point plane coordinates as (x, y), then
Its correspondence EPSG:Coordinate under 3857 space coordinates is (X, Y), EPSG:Mapping range under 3857 space coordinates is
The mapping range of x/y plane in (Xmin~Xmax, Ymin~Ymax), corresponding three-dimensional coordinate system for (xmin~
Xmax, ymin~ymax), then EPSG:The seat of the x/y plane in coordinate and three-dimensional coordinate system in 3857 space coordinates
Shown in target relation such as formula (2)：
By ESPG:After XY coordinates are mapped on the x/y plane in three-dimensional coordinate system in 3857 spatial frame of reference, press
Height value Z is individually mapped according to XY coordinate identical ratios, then stretched according still further to certain multiple, under specifically meeting
State formula (3)
Wherein, Z is EPSG:Height value in 3857 space coordinates, z is the height value in three-dimensional coordinate system, and N is
Draw ratio.
Method two, according to first mapping ratio by format into object format data carry out plane coordinates mapping after, according to default
Fixed mapping ratio carries out the modeling data that elevation coordinate mapping determines bridge environment to format into object format data.
Format into object format data is subjected to plane coordinates according to the first mapping ratio and maps consistent with described in method one, this
Place is repeated no more.Default fixed mapping ratio is obtained according to test of many times, after progress plane coordinates mapping, according to default
Fixation mapping ratio be stretched to certain limit by what height value Z was fixed, default fixed mapping ratio can be 0~40.If
Determine EPSG:The mapping range of height value Z under 3857 space coordinates is Zmin~Zmax, and default fixed mapping ratio is
40, coordinate value is z in the height value Z corresponding three-dimensional space coordinates of any point in research range, then elevation coordinate mapping is specific
As shown in formula (4)：
Can be with real world more closely, being stretched according to fixed mapping ratio using the mapping ratio with XY coordinates equally
Height value makes Three-dimensional Display effect more obvious, therefore above two mapping method all has certain versatility, goes for
Different research area so that dimensional topography elevation display effect will not change as the height value in research area is different.
After environmental data around to bridge is pre-processed, bridge environment is set up according to the modeling data of bridge environment
Three-dimensional scene models comprise the following steps, as shown in Figure 3：
Step S301, bridge environment model object is built according to the modeling data of bridge environment.
Step S302, display optimization is carried out to bridge environment model object.
Step S303, texture renders and mapped determination bridge environment three are carried out by the bridge environment model object after optimization
Tie up model of place.
Specifically, in step S301, utilize expansible hypertext transfer request (XMLHttpRequest, abbreviation XHR)
Object is communicated with server, and the return Value Types of XHR objects are set into arraybuffer, can so be made from server
The binary system SRTM dem datas of acquisition are directly stored in browser internal memory.Then utilize in JavaScript
Binary data stream in internal memory is directly changed into integer array by Int16Array objects, and the value in the array is SRTM
Height value Z in dem data, reads and data storage can improve browser execution efficiency by means of which.Finally use
WebGL third party library Three.js creates Rule acquisition PlaneGeometry objects, and according to height value array pair
The three-dimensional z coordinate of each grid points is modified in PlaneGeometry objects, is constructed and is just risen and fallen by height value difference
Relief model.
In step s 302, level of detail model (Levels of Detail, abbreviation LOD) technology specifically can be used to bridge
Beam environmental model object carries out display optimization.When object distance far away from the less region of screen compared with being shown, it can use
More rough model is described, when object in the larger region of screen compared with closely being shown, just using more fine
Model is described.Successively can also upwards it be simplified using pyramidal rule of simplification, main rule is that lower floor four is adjacent
Point be divided into one group, then take the average value of their elevations as the height value of upper strata point.
In step S303, textures are carried out to relief model using high score image texture.There are texture maps and landform mould
, it is necessary to be combined both according to certain rule after type, this process is referred to as texture mapping.Texture in the embodiment of the present invention
Mapping is mapped by the way of UV coordinates, and U and V represent wide and height respectively in UV coordinates, and their mapping range is all
[0,1], as shown in Figure 4.Relief model is that each summit sets corresponding UV coordinates, is so assured that when building
Texture image is fitted with which kind of position, renders more life-like 3-D effect.
After the three-dimensional scene models for building bridge environment, the threedimensional model of bridge is set up according to the structured data of bridge,
Then the ratio of the threedimensional model of bridge is adjusted according to the three-dimensional scene models of bridge environment, finally by the three dimensional field of bridge environment
The threedimensional model of bridge after scape model and adjustment ratio is fitted and is segmented loading and shown.Bridge can also built in addition
After the three-dimensional scene models of environment, the structure ratio of the threedimensional model of bridge is first determined according to the three-dimensional scene models of bridge environment
Example, resettles the threedimensional model of bridge.Such as, during the threedimensional model of bridge is built, with the Google fitted with landform
Map is put into 3Dmax modeling softwares as background, is calculated Google Maps and is accounted for lattice, and each length of network in 3Dmax
Degree, obtains the distance in 3Dmax and the corresponding relation of map distance, calculates the ratio for obtaining bridge modeling.According to the bridge of calculating
Beam models the structured data of ratio and bridge, and three-dimensional modeling is carried out to bridge in 3Dmax.
Due to the ratio of the threedimensional model according to the three-dimensional scene models of bridge environment adjustment bridge, therefore can be preferably by bridge
The three-dimensional scene models of beam environment are fitted with the threedimensional model of bridge, and are overlapped in proportion with the bridge in Google image, so that
Make the three-dimensional bridge scene of display more true to nature.Three-dimensional bridge scene is segmented in addition and loaded, it is to avoid browser is left white time mistake
Long or browser is stuck.
In order to preferably explain the embodiment of the present invention, describe the embodiment of the present invention below by specific implement scene and provide
A kind of three-dimensional bridge scenario building method flow, as shown in figure 5, comprising the following steps：
Step S501, dem data pretreatment.
Step S502, the three-dimensional scene models of bridge environment are built.
Step S503, three-dimensional bridge scenario building and loading, wherein three bridge scenes include the three dimensional field of bridge environment
The threedimensional model of scape model and bridge.
In wherein step S501, dem data preprocessing process specifically includes following steps：
Step S5011, obtains dem data.
Step S5012, dem data re-projection.
Step S5013, the conversion of dem data form.
Step S5014, plane coordinates mapping.
Step S5015, elevation coordinate mapping.
In wherein step S502, the three-dimensional scene models building process of bridge environment specifically includes following steps：
Step S5021, builds bridge environment model object.
Step S5022, bridge environment model object display optimization.
Step S5023, the texture of bridge environment model object is rendered and mapped.
In wherein step S503, three-dimensional bridge scenario building and loading procedure specifically include following steps：
Step S5031, the threedimensional model of bridge is built.
Step S5032, the ratio adjustment of the threedimensional model of bridge.
Step S5033, the three-dimensional scene models of bridge environment are fitted and loaded with the threedimensional model of bridge.
The embodiment of the present invention shows, the environmental data around the structured data and the bridge of bridge is obtained, to the bridge
Environmental data around beam obtains the modeling data of bridge environment after being pre-processed.Then according to the modeling of the bridge environment
Data set up the three-dimensional scene models of the bridge environment, and set up according to the structured data of the bridge three-dimensional of the bridge
Model.Finally the threedimensional model of the three-dimensional scene models of the bridge environment and the bridge is fitted and shown.This hair
In bright embodiment, according to the environmental data around the structured data and bridge of bridge set up bridge environment three-dimensional scene models and
After the threedimensional model of bridge, the threedimensional model of the three-dimensional scene models of bridge environment and bridge is subjected to laminating and builds three-dimensional bridge
Scene, the three-dimensional bridge scene can both show the complicated spatial structural form of bridge, can also show the environment on bridge periphery
Information, so as to contribute to bridge maintenance personnel to set up bridge maintenance scheme according to the actually located environment of bridge.
Based on same idea, Fig. 6 it is exemplary show a kind of three-dimensional bridge scenario building provided in an embodiment of the present invention
The structure of device, the device can perform the flow of three-dimensional bridge scenario building method.
As shown in fig. 6, the device includes：
Acquisition module 601, the environmental data around structured data and the bridge for obtaining bridge；
Processing module 602, for obtaining building for bridge environment after being pre-processed to the environmental data around the bridge
Modulus evidence；The three-dimensional scene models of the bridge environment are set up according to the modeling data of the bridge environment, and according to the bridge
The structured data of beam sets up the threedimensional model of the bridge；By the three of the three-dimensional scene models of the bridge environment and the bridge
Dimension module is fitted and shown.
Alternatively, the processing module 602 specifically for：
Re-projection data are obtained after environmental data around the bridge is projected again；
Re-projection data progress Data Format Transform is determined into format into object format data；
The format into object format data is subjected to the modeling data that three dimensional space coordinate mapping determines bridge environment.
Alternatively, the processing module 602 specifically for：
According to the first mapping ratio by after format into object format data progress plane coordinates mapping, reflected according to described first
Penetrate ratio and the modeling data that elevation coordinate mapping determines bridge environment is carried out to the format into object format data；Or
According to first mapping ratio by the format into object format data carry out plane coordinates mapping after, according to default fixation
Mapping ratio carries out the modeling data that elevation coordinate mapping determines bridge environment to the format into object format data.
Alternatively, the processing module 602 specifically for：
Bridge environment model object is built according to the modeling data of the bridge environment；
Display optimization is carried out to the bridge environment model object；
Bridge environment model object after optimization is subjected to the three-dimensional scenic mould that texture renders and maps determination bridge environment
Type.
Alternatively, the processing module 602 specifically for：
The ratio of the threedimensional model of the bridge is adjusted according to the three-dimensional scene models of the bridge environment；
The threedimensional model of bridge after the three-dimensional scene models of the bridge environment and adjustment ratio is fitted and divided
Section loading displaying.
It should be understood by those skilled in the art that, embodiments of the invention can be provided as method or computer program product.
Therefore, the present invention can be using the embodiment in terms of complete hardware embodiment, complete software embodiment or combination software and hardware
Form.Deposited moreover, the present invention can use to can use in one or more computers for wherein including computer usable program code
The shape for the computer program product that storage media is implemented on (including but is not limited to magnetic disk storage, CD-ROM, optical memory etc.)
Formula.
The present invention is the flow with reference to method according to embodiments of the present invention, equipment (system) and computer program product
Figure and/or block diagram are described.It should be understood that can be by every first-class in computer program instructions implementation process figure and/or block diagram
Journey and/or the flow in square frame and flow chart and/or block diagram and/or the combination of square frame.These computer programs can be provided
The processor of all-purpose computer, special-purpose computer, Embedded Processor or other programmable data processing devices is instructed to produce
A raw machine so that produced by the instruction of computer or the computing device of other programmable data processing devices for real
The device for the function of being specified in present one flow of flow chart or one square frame of multiple flows and/or block diagram or multiple square frames.
These computer program instructions, which may be alternatively stored in, can guide computer or other programmable data processing devices with spy
Determine in the computer-readable memory that mode works so that the instruction being stored in the computer-readable memory, which is produced, to be included referring to
Make the manufacture of device, the command device realize in one flow of flow chart or multiple flows and/or one square frame of block diagram or
The function of being specified in multiple square frames.
These computer program instructions can be also loaded into computer or other programmable data processing devices so that in meter
Series of operation steps is performed on calculation machine or other programmable devices to produce computer implemented processing, thus in computer or
The instruction performed on other programmable devices is provided for realizing in one flow of flow chart or multiple flows and/or block diagram one
The step of function of being specified in individual square frame or multiple square frames.
, but those skilled in the art once know basic creation although preferred embodiments of the present invention have been described
Property concept, then can make other change and modification to these embodiments.So, appended claims are intended to be construed to include excellent
Select embodiment and fall into having altered and changing for the scope of the invention.
Obviously, those skilled in the art can carry out the essence of various changes and modification without departing from the present invention to the present invention
God and scope.So, if these modifications and variations of the present invention belong to the scope of the claims in the present invention and its equivalent technologies
Within, then the present invention is also intended to comprising including these changes and modification.
Claims (10)
1. a kind of three-dimensional bridge scenario building method, it is characterised in that including：
Obtain the environmental data around the structured data and the bridge of bridge；
The modeling data of bridge environment is obtained after being pre-processed to the environmental data around the bridge；
The three-dimensional scene models of the bridge environment are set up according to the modeling data of the bridge environment, and according to the bridge
Structured data sets up the threedimensional model of the bridge；
The threedimensional model of the three-dimensional scene models of the bridge environment and the bridge is fitted and shown.
2. the method as described in claim 1, it is characterised in that the environmental data to around the bridge is pre-processed
The modeling data of bridge environment is obtained afterwards, including：
Re-projection data are obtained after environmental data around the bridge is projected again；
Re-projection data progress Data Format Transform is determined into format into object format data；
The format into object format data is subjected to the modeling data that three dimensional space coordinate mapping determines bridge environment.
3. method as claimed in claim 2, it is characterised in that described that the format into object format data is subjected to three dimensional space coordinate
Mapping determines the modeling data of bridge environment, including：
According to the first mapping ratio by after format into object format data progress plane coordinates mapping, compared according to the described first mapping
Example carries out the modeling data that elevation coordinate mapping determines bridge environment to the format into object format data；Or
According to the first mapping ratio by after format into object format data progress plane coordinates mapping, mapped according to default fixation
Ratio carries out the modeling data that elevation coordinate mapping determines bridge environment to the format into object format data.
4. the method as described in claim 1, it is characterised in that described according to being set up the modeling data of the bridge environment
The three-dimensional scene models of bridge environment, including：
Bridge environment model object is built according to the modeling data of the bridge environment；
Display optimization is carried out to the bridge environment model object；
Bridge environment model object after optimization is subjected to the three-dimensional scene models that texture renders and maps determination bridge environment.
5. the method as described in claim 1, it is characterised in that described by the three-dimensional scene models of the bridge environment and described
The threedimensional model of bridge is fitted and shown, including：
The ratio of the threedimensional model of the bridge is adjusted according to the three-dimensional scene models of the bridge environment；
The threedimensional model of bridge after the three-dimensional scene models of the bridge environment and adjustment ratio is fitted and is segmented and is added
Carry displaying.
6. a kind of three-dimensional bridge scenario building device, it is characterised in that including：
Acquisition module, the environmental data around structured data and the bridge for obtaining bridge；
Processing module, the modeling data for obtaining bridge environment after being pre-processed to the environmental data around the bridge；
The three-dimensional scene models of the bridge environment are set up according to the modeling data of the bridge environment, and according to the structure of the bridge
Data set up the threedimensional model of the bridge；The threedimensional model of the three-dimensional scene models of the bridge environment and the bridge is entered
Row is fitted and shown.
7. device as claimed in claim 6, it is characterised in that the processing module specifically for：
Re-projection data are obtained after environmental data around the bridge is projected again；
Re-projection data progress Data Format Transform is determined into format into object format data；
The format into object format data is subjected to the modeling data that three dimensional space coordinate mapping determines bridge environment.
8. device as claimed in claim 7, it is characterised in that the processing module specifically for：
According to the first mapping ratio by after format into object format data progress plane coordinates mapping, compared according to the described first mapping
Example carries out the modeling data that elevation coordinate mapping determines bridge environment to the format into object format data；Or
According to the first mapping ratio by after format into object format data progress plane coordinates mapping, mapped according to default fixation
Ratio carries out the modeling data that elevation coordinate mapping determines bridge environment to the format into object format data.
9. device as claimed in claim 6, it is characterised in that the processing module specifically for：
Bridge environment model object is built according to the modeling data of the bridge environment；
Display optimization is carried out to the bridge environment model object；
Bridge environment model object after optimization is subjected to the three-dimensional scene models that texture renders and maps determination bridge environment.
10. device as claimed in claim 6, it is characterised in that the processing module specifically for：
The ratio of the threedimensional model of the bridge is adjusted according to the three-dimensional scene models of the bridge environment；
The threedimensional model of bridge after the three-dimensional scene models of the bridge environment and adjustment ratio is fitted and is segmented and is added
Carry displaying.
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