CN110058684B - Geographic information interaction method, system and storage medium based on VR technology - Google Patents
Geographic information interaction method, system and storage medium based on VR technology Download PDFInfo
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- CN110058684B CN110058684B CN201910215032.6A CN201910215032A CN110058684B CN 110058684 B CN110058684 B CN 110058684B CN 201910215032 A CN201910215032 A CN 201910215032A CN 110058684 B CN110058684 B CN 110058684B
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- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06F—ELECTRIC DIGITAL DATA PROCESSING
- G06F3/00—Input arrangements for transferring data to be processed into a form capable of being handled by the computer; Output arrangements for transferring data from processing unit to output unit, e.g. interface arrangements
- G06F3/01—Input arrangements or combined input and output arrangements for interaction between user and computer
- G06F3/011—Arrangements for interaction with the human body, e.g. for user immersion in virtual reality
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- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06T—IMAGE DATA PROCESSING OR GENERATION, IN GENERAL
- G06T17/00—Three dimensional [3D] modelling, e.g. data description of 3D objects
- G06T17/05—Geographic models
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- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06T—IMAGE DATA PROCESSING OR GENERATION, IN GENERAL
- G06T17/00—Three dimensional [3D] modelling, e.g. data description of 3D objects
- G06T17/20—Finite element generation, e.g. wire-frame surface description, tesselation
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- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06T—IMAGE DATA PROCESSING OR GENERATION, IN GENERAL
- G06T19/00—Manipulating 3D models or images for computer graphics
- G06T19/006—Mixed reality
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- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06F—ELECTRIC DIGITAL DATA PROCESSING
- G06F2203/00—Indexing scheme relating to G06F3/00 - G06F3/048
- G06F2203/01—Indexing scheme relating to G06F3/01
- G06F2203/012—Walk-in-place systems for allowing a user to walk in a virtual environment while constraining him to a given position in the physical environment
Abstract
The invention relates to a geographic information interaction method, a geographic information interaction system and a storage medium based on a VR (virtual reality) technology. The geographic information interaction method comprises the following steps: establishing a three-dimensional geographic model in a VR scene; acquiring the position and the posture of a VR device; determining a mark area aligned by an alignment line of the VR device according to the position and the posture; judging whether the marked area is a preset area corresponding to the virtual slice; if yes, when the VR device controls the virtual slice to move, the virtual slice is used for obtaining a three-dimensional image slice in the three-dimensional geographic model. According to the embodiment of the invention, the position and the posture of the VR device in the three-dimensional scene are obtained, the area aligned with the alignment line of the VR device is determined, when the area aligned with the alignment line is the area corresponding to the virtual slice, the three-dimensional image slice is obtained in the three-dimensional geographic model through the virtual slice, and the local slice in the three-dimensional geographic model is obtained in real time through an interactive means, so that a user can observe and process the details of the three-dimensional geographic model conveniently.
Description
Technical Field
The invention relates to the technical field of VR display, in particular to a geographic information interaction method, a geographic information interaction system and a geographic information interaction storage medium based on VR technology.
Background
A geographic model refers to a physical or mathematical statistical model that abstractly represents the state of a regional geographic system or the characteristics of its constituent elements. Is one of the important tools and methods for the research of the geoscience. However, due to the complex variability and openness of the regional geographic system, many factors affecting the regional geographic system and their effects cannot be accurately determined, so that the application is more extensive and the statistical mathematical model obtained by the empirical summary is relatively few. A geospatial model established by using a map and a remote sensing technology is a special tool for geographic research.
Some three-dimensional software in the computer end can process the visualized terrain data, for example, the equal depth line of a certain depth of the terrain, the longitude and latitude coordinates of a certain point, the data information of height or depth and the like are taken.
However, various images displayed on the computer or processed data information are all plane display images, a user needs to continuously adjust the images displayed in the three-dimensional software to construct a corresponding three-dimensional scene in mind, and the scenes displayed in different directions may have regions which cannot be displayed, so that the user cannot effectively acquire the global image change condition.
Disclosure of Invention
In order to solve the problems in the prior art, at least one embodiment of the present invention provides a method, a system, and a storage medium for geographic information interaction based on VR technology.
In a first aspect, an embodiment of the present invention provides a geographic information interaction method based on a VR technology, where the interaction method includes:
establishing a three-dimensional geographic model in a VR scene;
acquiring the position and the posture of a VR device; determining a mark area aligned by an alignment line of the VR device according to the position and the posture;
judging whether the marked area is a preset area corresponding to the virtual slice;
if yes, when the VR device controls the virtual slice to move, the virtual slice is used for obtaining a three-dimensional image slice in the three-dimensional geographic model.
Based on the above technical solutions, the embodiments of the present invention may be further improved as follows.
With reference to the first aspect, in a first embodiment of the first aspect, the selecting a three-dimensional image slice in the three-dimensional geographic model with the virtual slice includes:
acquiring parameter information set by the virtual slice;
confirming the virtual slice direction of the virtual slice according to the parameter information;
and determining the selected three-dimensional image slice in the three-dimensional geographic model according to the position of the virtual slice and the direction of the virtual slice.
With reference to the first embodiment of the first aspect, in a second embodiment of the first aspect, the determining, in the three-dimensional geographic model, the selected three-dimensional image slice according to the position of the virtual slice and the virtual slice direction includes:
acquiring geographic data for establishing the three-dimensional geographic model;
confirming a corresponding virtual slice type according to the virtual slice direction;
and acquiring corresponding geographic data according to the virtual slice type to generate the three-dimensional image slice.
With reference to the first aspect, in a third embodiment of the first aspect, the geographic information interaction method further includes:
and amplifying the three-dimensional image slice in the VR scene for displaying.
With reference to the first aspect or the first, second, or third embodiment of the first aspect, in a fourth embodiment of the first aspect, the geographic information interaction method further includes:
acquiring the motion direction of the virtual slice;
and setting the transparency of the three-dimensional geographic model in the direction opposite to the movement direction to be at least fifty percent by taking the surface where the virtual slice is positioned as a dividing surface.
With reference to the first aspect, in a fifth embodiment of the first aspect, the geographic information interaction method further includes:
judging whether the marked area is an area on the three-dimensional geographic model;
if yes, acquiring position information of the marked area on the three-dimensional geographic model, and acquiring corresponding geographic information according to the position information;
and displaying the geographic information.
With reference to the fifth embodiment of the first aspect, in a sixth embodiment of the first aspect, the obtaining the position information of the marked area on the three-dimensional geographic model includes:
performing quadtree segmentation on the data points on the three-dimensional geographic model;
and determining the minimum block of the marking area on the three-dimensional geographic model according to the three-dimensional geographic model after the quadtree is segmented.
With reference to the sixth embodiment of the first aspect, in a seventh embodiment of the first aspect, the obtaining the corresponding geographic information according to the location information includes:
acquiring the relative position of the mark area in a triangular area of the triangular mesh of the minimum block;
acquiring vertex coordinates of the triangular area in the three-dimensional geographic model;
determining the accurate position of the marking region in the three-dimensional geographic model according to the vertex coordinates and the relative position;
and acquiring the geographic information from the geographic data for establishing the three-dimensional geographic model according to the accurate position.
In a second aspect, an embodiment of the present invention provides a geographic information interaction system, where the geographic information interaction system includes a processor and a memory; the processor is configured to execute the geographic information interaction program stored in the memory to implement the geographic information interaction method according to any one of the embodiments of the first aspect.
In a third aspect, an embodiment of the present invention provides a computer-readable storage medium, where one or more programs are stored, and the one or more programs are executable by one or more processors to implement the geographic information interaction method described in any of the embodiments in the first aspect.
Compared with the prior art, the technical scheme of the invention has the following advantages: according to the embodiment of the invention, the position and the posture of the VR device in the three-dimensional scene are obtained, the area aligned with the alignment line of the VR device is determined, when the area aligned with the alignment line is the area corresponding to the virtual slice, the three-dimensional image slice is obtained in the three-dimensional geographic model through the virtual slice, and the local slice in the three-dimensional geographic model is obtained in real time through an interactive means, so that a user can observe and process the details of the three-dimensional geographic model conveniently.
Drawings
Fig. 1 is a schematic flowchart of a geographic information interaction method based on a VR technology according to an embodiment of the present invention;
fig. 2 is a schematic flowchart of a geographic information interaction method based on VR technology according to another embodiment of the present invention;
fig. 3 is a schematic flowchart of a geographic information interaction method based on VR technology according to another embodiment of the present invention;
fig. 4 is a schematic structural diagram of a geographic information interaction system based on VR technology according to another embodiment of the present invention.
Detailed Description
In order to make the objects, technical solutions and advantages of the embodiments of the present invention clearer, 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 some, but not all, embodiments of the present invention. All other embodiments, which can be obtained by a person skilled in the art without any inventive step based on the embodiments of the present invention, are within the scope of the present invention.
As shown in fig. 1, an embodiment of the present invention provides a geographic information interaction method based on a VR technology, where the interaction method includes:
and S11, building a three-dimensional geographic model in the VR scene.
In this embodiment, VR is a virtual reality technology, which is a computer simulation system capable of creating and experiencing a virtual world, and it uses a computer to generate a simulated environment, which is a system simulation of multi-source information fusion, interactive three-dimensional dynamic views and physical behaviors to immerse users in the environment. And constructing a three-dimensional geographic model displayed to a user in a VR scene, and observing a complete three-dimensional geographic model in the VR scene after the user enters the VR scene through VR equipment, such as a sand table terrain scene obtained by scaling according to a real geographic scene.
S12, acquiring the position and the posture of the VR device; and determining a marking region to which an alignment line of the VR device is aligned based on the position and the pose.
In this embodiment, the position and the posture of the VR device are acquired in real time, the VR device may be a VR handle or a VR device such as a motion capture glove, and the specific position of the VR device in the VR scene is determined by acquiring the position and the posture of the VR device.
In this embodiment, the mark area may be a block preset in the VR scene, where a plurality of mark areas may be provided, and the functions corresponding to different mark areas are not consistent.
And S13, judging whether the mark area is a preset area corresponding to the virtual slice.
In this embodiment, it is determined whether the mark area is a preset area corresponding to the virtual slice, and when the mark area corresponds to the virtual slice, a virtual slice may be virtually generated at the mark area in the VR scene, and an alignment line between the virtual slice and the VR device is fixed, that is, the mark area is bound to the alignment line of the VR device, or a slice may be virtually generated on the alignment line, and the slice and the alignment line are integrated, and when the alignment line is controlled by the VR device to move, the VR device is synchronously controlled to move.
And if so, when the VR device controls the virtual slice to move, the virtual slice is used for acquiring the three-dimensional image slice in the three-dimensional geographic model.
In this embodiment, a three-dimensional image slice refers to an image corresponding to a slice in a three-dimensional image. The section may be a plane parallel to XY, YZ, and XZ planes at a point inside the image, or may be a plane passing through a point inside the three-dimensional image in any direction, and the specific slice direction may be determined by parameters set by the virtual slice.
As shown in fig. 2, an embodiment of the present invention provides a geographic information interaction method, which is different from the geographic information interaction method shown in fig. 1 in that a three-dimensional image slice in a three-dimensional geographic model is selected as a virtual slice, and includes:
and S21, acquiring parameter information of the virtual slice setting.
In this embodiment, the parameter information set by the virtual slice may include: a direction corresponding to the virtual slice, for example, if an XY plane in the established three-dimensional coordinate system is a contour line plane in the three-dimensional geographic model; a contour line section can be obtained on a plane parallel to the XY plane; a plane parallel to the YZ plane may obtain a longitude slice, a plane parallel to the XZ plane may obtain a latitude slice, and in this embodiment, the direction of the slice may also be other directions that are not commonly used, and specific parameters may be set by a user.
And S22, confirming the virtual slice direction of the virtual slice according to the parameter information.
In this embodiment, the corresponding virtual slice direction is confirmed by the parameter information of the slice, the corresponding virtual slice direction may be set in the parameter information, or the direction corresponding to the virtual slice may be calculated according to the position of each point on the virtual slice.
And S23, determining the selected three-dimensional image slice in the three-dimensional geographic model according to the position of the virtual slice and the virtual slice direction.
In this embodiment, for example, if the virtual slice direction is a contour plane parallel to the XY plane, the position where the obtained virtual slice is located is obtained, that is, the height of the virtual slice can be determined, at this time, the three-dimensional image slice is selected from the three-dimensional geographic model according to the height of the virtual slice, so that the three-dimensional image slice is selected from the three-dimensional geographic model, and similarly, in other different virtual slice directions, the corresponding three-dimensional image slice can be determined in the three-dimensional geographic model respectively.
Specifically, the method for determining the selected three-dimensional image slice in the three-dimensional geographic model comprises the following steps:
and S31, acquiring geographic data for building the three-dimensional geographic model.
In this embodiment, the geographic data for establishing the three-dimensional geographic model may be geographic data in a real geographic scene, for example, longitude and latitude data and geographic height data of each point.
And S32, confirming the corresponding virtual slice type according to the virtual slice direction.
In this embodiment, the virtual slice type corresponding to the virtual slice, such as contour slice, longitude and latitude slice, is determined according to the direction of the virtual slice.
And S33, acquiring corresponding geographic data according to the virtual slice type to generate a three-dimensional image slice.
In this embodiment, according to the type of the slice, corresponding data is selected from the geographic data according to the position of the slice to form a three-dimensional image slice, for example, if the type of the slice is a contour slice, all geographic data consistent with the height of the slice are obtained, and a plane is formed according to longitude and latitude coordinates, so that the contour slice can be obtained, and similarly, a longitude slice and a latitude slice can be obtained.
In this embodiment, the three-dimensional image slice is enlarged and displayed in the VR scene, specifically, a display frame may be set in the VR scene, and after the three-dimensional image slice is enlarged to the size of the display frame, the three-dimensional image slice is rendered into the display frame for viewing the enlarged three-dimensional image slice, so as to improve the observation of the user on the details of the geographic model.
In this embodiment, the geographic information interaction method further includes:
and S41, acquiring the motion direction of the virtual slice.
In this embodiment, the obtaining VR means controls the moving direction of the virtual slice, where the moving direction should be planned with the slice direction of the virtual slice, for example, the direction of the virtual slice is a plane direction parallel to the XY plane, and the moving direction at this time should be a direction perpendicular to the XY plane, i.e., from top to bottom, or from bottom to top, i.e., the moving direction in this embodiment should be a direction parallel to the plane of the virtual slice.
And S42, taking the plane where the virtual slice is positioned as a dividing plane, and setting the transparency of the three-dimensional geographic model in the direction opposite to the movement direction to be at least fifty percent.
In this embodiment, a plane where the virtual slice is located is taken as a dividing plane, the three-dimensional geographic model is divided into two parts, and the transparency of the three-dimensional geographic model in the direction opposite to the moving direction is set to be at least fifty percent, for example, may be set to be one hundred percent transparent, so that the user may observe the three-dimensional image slice and the three-dimensional geographic model after the moving direction, and the user may conveniently view the three-dimensional geographic model.
As shown in fig. 3, an embodiment of the present invention provides a geographic information interaction method, which is different from the geographic information interaction method shown in fig. 1 in that the geographic information interaction method includes:
and S51, building a three-dimensional geographic model in the VR scene.
Regarding step S51, refer to the description in step S11 for details, which are not repeated herein.
S52, acquiring the position and the posture of the VR device; and determining a marking region to which an alignment line of the VR device is aligned based on the position and the pose.
For step S52, reference may be made to the description in step S12, and this embodiment is not described herein again.
And S53, judging whether the marked area is an area on the three-dimensional geographic model.
In this embodiment, it is determined whether the marked area is on the three-dimensional geographic model, for example, the position information of the marked area may be obtained by obtaining the position information of the boundary point of the three-dimensional geographic model, and it is determined whether the position information of the boundary point of the three-dimensional geographic model surrounds the marked area, and if so, the marked area is an area on the three-dimensional geographic model.
And S54, if yes, acquiring the position information of the marking area on the three-dimensional geographic model, and acquiring corresponding geographic information according to the position information.
In this embodiment, the relative position information of the marked region on the three-dimensional geographic model is obtained, and the corresponding geographic information is obtained on the three-dimensional geographic model according to the relative position information.
When the marked area is an area on the three-dimensional geographic model, the marked area is a collision point between an alignment line of the VR device and the three-dimensional geographic model.
And S55, displaying the geographic information.
In this embodiment, obtaining the position information of the marked area on the three-dimensional geographic model includes:
and S61, performing quadtree segmentation on the data points on the three-dimensional geographic model.
Quadtree segmentation, also called quadtree, is a tree-like data structure with four sub-blocks on each node. Quaternary trees are often used for analysis and classification of two-dimensional spatial data, which distinguishes the data into four quadrants. The data range can be square or rectangular or in any other shape, and the blocks after the three-dimensional geographic model is divided into four parts each time are divided into the preset minimum blocks.
And S62, determining the minimum block of the marking area on the three-dimensional geographic model according to the three-dimensional geographic model after the quadtree is segmented.
In this embodiment, according to the estimated intersection points in the three-dimensional geographic data, an actual intersection point is accurately searched in the three-dimensional geographic model after the quadtree is segmented, wherein the estimated intersection points are collision points of an alignment line of the VR device and the three-dimensional geographic model, and after an area where the estimated intersection points are located is found, the method for obtaining the actual intersection points is to traverse all minimum blocks of the area to find the minimum block where the estimated intersection points are located, and quickly determine the position where the mark area is located.
In this embodiment, acquiring the corresponding geographic information according to the location information includes:
and S71, acquiring the relative position of the mark area in the triangular area of the triangular mesh of the minimum block.
Since the three-dimensional geographic model is formed by a triangular mesh, in the present embodiment, the relative position of the mark region in the triangular region of the triangular mesh including the minimum region, that is, the distance between the mark region and each side or each corner in the triangular region, is obtained.
And S72, acquiring the vertex coordinates of the triangular area in the three-dimensional geographic model.
The relative coordinates of the vertexes of the triangular area in the three-dimensional geographic model are obtained, and the vertex coordinates of the triangle can be directly obtained through direct retrieval in geographic data for establishing the three-dimensional geographic model.
And S73, determining the accurate position of the mark area in the three-dimensional geographic model according to the vertex coordinates and the relative position.
And obtaining the accurate position of the marked area in the three-dimensional geographic model through conversion according to the vertex coordinates of the triangular area and the relative position of the marked area and the triangular area.
And S74, acquiring geographic information from the geographic data for establishing the three-dimensional geographic model according to the accurate position.
Corresponding geographic information can be obtained from the geographic data for establishing the three-dimensional geographic model according to the accurate position information, for example, the longitude and latitude information and the height information corresponding to the accurate position information at the moment can be obtained through proportional conversion according to the longitude and latitude of the three-dimensional geographic model, the size of the model and the like.
As shown in fig. 4, an embodiment of the present invention provides a geographic information interaction system, which includes a processor and a memory; the processor is used for executing the geographic information interaction program stored in the memory so as to realize the geographic information interaction method of any one of the above embodiments.
The storage medium for recording the program code of the software program that can realize the functions of the above-described embodiments is provided to the system or apparatus in the above-described embodiments, and the program code stored in the storage medium is read and executed by the computer (or CPU or MPU) of the system or apparatus.
In this case, the program code itself read out from the storage medium performs the functions of the above-described embodiments, and the storage medium storing the program code constitutes an embodiment of the present invention.
As a storage medium for supplying the program code, for example, a flexible disk, hard disk, optical disk, magneto-optical disk, CD-ROM, CD-R, magnetic tape, nonvolatile memory card, ROM, and the like can be used.
The functions of the above-described embodiments may be realized not only by executing the readout program code by the computer, but also by some or all of actual processing operations executed by an OS (operating system) running on the computer according to instructions of the program code.
Further, the embodiments of the present invention also include a case where after the program code read out from the storage medium is written into a function expansion card inserted into the computer or into a memory provided in a function expansion unit connected to the computer, a CPU or the like included in the function expansion card or the function expansion unit performs a part of or the whole of the processing in accordance with the command of the program code, thereby realizing the functions of the above-described embodiments.
Embodiments of the present invention provide a computer-readable storage medium, where one or more programs are stored, and the one or more programs are executable by one or more processors to implement the geographic information interaction method according to any one of the above embodiments.
Finally, it should be noted that: the above examples are only intended to illustrate the technical solution of the present invention, but not to limit it; although the present invention has been described in detail with reference to the foregoing embodiments, it will be understood by those of ordinary skill in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some technical features may be equivalently replaced; and such modifications or substitutions do not depart from the spirit and scope of the corresponding technical solutions of the embodiments of the present invention.
Claims (10)
1. A geographic information interaction method based on VR technology is characterized in that the interaction method comprises the following steps:
establishing a three-dimensional geographic model in a VR scene;
acquiring the position and the posture of a VR device; determining a mark area aligned by an alignment line of the VR device according to the position and the posture;
judging whether the marked area is a preset area corresponding to the virtual slice;
if yes, when the VR device controls the virtual slice to move, the virtual slice is used for obtaining a three-dimensional image slice in the three-dimensional geographic model.
2. The geographic information interaction method of claim 1, wherein said selecting a three-dimensional image slice in said three-dimensional geographic model with said virtual slice comprises:
acquiring parameter information set by the virtual slice;
confirming the virtual slice direction of the virtual slice according to the parameter information;
and determining the selected three-dimensional image slice in the three-dimensional geographic model according to the position of the virtual slice and the virtual slice direction.
3. The geographic information interaction method of claim 2, wherein the determining the selected three-dimensional image slice in the three-dimensional geographic model according to the position of the virtual slice and the virtual slice direction comprises:
acquiring geographic data for establishing the three-dimensional geographic model;
confirming a corresponding virtual slice type according to the virtual slice direction;
and acquiring corresponding geographic data according to the virtual slice type to generate the three-dimensional image slice.
4. The geographic information interaction method according to claim 1, further comprising:
and amplifying the three-dimensional image slice in the VR scene for displaying.
5. The geographic information interaction method according to any one of claims 1 to 4, further comprising:
acquiring the motion direction of the virtual slice;
and setting the transparency of the three-dimensional geographic model in the direction opposite to the movement direction to be at least fifty percent by taking the surface where the virtual slice is positioned as a dividing surface.
6. The geographic information interaction method of claim 1, further comprising:
judging whether the marked area is an area on the three-dimensional geographic model;
if so, acquiring the position information of the marked area on the three-dimensional geographic model, and acquiring corresponding geographic information according to the position information;
and displaying the geographic information.
7. The method for geographic information interaction according to claim 6, wherein the obtaining of the position information of the marked region on the three-dimensional geographic model comprises:
performing quadtree segmentation on the data points on the three-dimensional geographic model;
and determining the minimum block of the marking area on the three-dimensional geographic model according to the three-dimensional geographic model after the quadtree is segmented.
8. The method for geographic information interaction according to claim 7, wherein the obtaining the corresponding geographic information according to the location information comprises:
acquiring the relative position of the mark area in a triangular area of the triangular mesh of the minimum block;
acquiring vertex coordinates of the triangular area in the three-dimensional geographic model;
determining the accurate position of the marking region in the three-dimensional geographic model according to the vertex coordinates and the relative position;
and acquiring the geographic information from the geographic data for establishing the three-dimensional geographic model according to the accurate position.
9. A geographic information interaction system is characterized in that the geographic information interaction system comprises a processor and a memory; the processor is used for executing the geographic information interaction program stored in the memory so as to realize the geographic information interaction method of any one of claims 1-8.
10. A computer-readable storage medium, wherein the computer-readable storage medium stores one or more programs, the one or more programs being executable by one or more processors to implement the geographic information interaction method of any one of claims 1-8.
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| CN114089836B (en) * | 2022-01-20 | 2023-02-28 | 中兴通讯股份有限公司 | Labeling method, terminal, server and storage medium |
| CN115409871B (en) * | 2022-10-31 | 2023-03-24 | 浙江中测新图地理信息技术有限公司 | Three-dimensional scene virtual-real interaction method and device based on position intelligence |
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| CN108465240A (en) * | 2018-03-22 | 2018-08-31 | 腾讯科技（深圳）有限公司 | Mark point position display method, device, terminal and computer readable storage medium |
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