CN113656514A - Visualization method and device for three-dimensional model of mine - Google Patents
Visualization method and device for three-dimensional model of mine Download PDFInfo
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- 238000012800 visualization Methods 0.000 claims abstract description 13
- 238000004590 computer program Methods 0.000 claims description 6
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- 229910052802 copper Inorganic materials 0.000 description 1
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- G06F16/20—Information retrieval; Database structures therefor; File system structures therefor of structured data, e.g. relational data
- G06F16/28—Databases characterised by their database models, e.g. relational or object models
- G06F16/284—Relational databases
- G06F16/285—Clustering or classification
- G06F16/287—Visualization; Browsing
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- G06F16/20—Information retrieval; Database structures therefor; File system structures therefor of structured data, e.g. relational data
- G06F16/22—Indexing; Data structures therefor; Storage structures
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- G—PHYSICS
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Abstract
The application provides a visualization method and a visualization device for a three-dimensional mine model, wherein the method comprises the following steps: acquiring current height information and current breadth information corresponding to a current visual angle; determining nodes to be displayed in the three-dimensional model of the mine according to the current height information and the current breadth information; determining a node to be loaded according to the node to be displayed and the loaded node; acquiring a data block corresponding to a node to be loaded; and drawing according to the data block corresponding to the node to be loaded. According to the method, the model data is loaded and scheduled according to the height information and the breadth information corresponding to the current visual angle, so that the loading speed and the model visualization fluency are improved.
Description
Technical Field
The application relates to the technical field of data display, in particular to a visualization method and device for a three-dimensional mine model.
Background
Coal, iron, copper and other resources play an irreplaceable important role in national economy and social development. The safe production of these resources has been a worldwide problem. In recent years, with the development of information technology, a three-dimensional model of a mine, particularly a complex scene of the mine, can be constructed through surveying, and the safety of resource exploitation can be improved based on the three-dimensional model.
However, the data volume of the three-dimensional model of some mines is large, and particularly in complex scenes of the mines, the problems of slow loading and unsmooth operation exist.
Disclosure of Invention
The application provides a visualization method and device for a three-dimensional mine model.
An embodiment of the application provides a visualization method for a three-dimensional mine model, which comprises the following steps:
acquiring current height information and current breadth information corresponding to a current visual angle;
determining nodes to be displayed in the three-dimensional model of the mine according to the current height information and the current breadth information;
determining a node to be loaded according to the node to be displayed and the loaded node;
acquiring a data block corresponding to the node to be loaded;
and drawing according to the data block corresponding to the node to be loaded.
The embodiment of this application another aspect provides a visual device of three-dimensional model of mine, includes:
the first acquisition module is used for acquiring current height information and current breadth information corresponding to a current visual angle;
the first determining module is used for determining nodes to be displayed in the three-dimensional mine model according to the current height information and the current breadth information;
the second determining module is used for determining the nodes to be loaded according to the nodes to be displayed and the loaded nodes;
the second acquisition module is used for acquiring the data block corresponding to the node to be loaded;
and the drawing module is used for drawing according to the data block corresponding to the node to be loaded.
Another embodiment of the present application provides a computer device, including a processor and a memory;
the processor runs a program corresponding to the executable program code by reading the executable program code stored in the memory, so as to implement the three-dimensional mine model visualization method according to the embodiment of the aspect.
In another aspect, the present application provides a non-transitory computer-readable storage medium, on which a computer program is stored, and the computer program, when executed by a processor, implements a method for visualizing a three-dimensional model of a mine according to an aspect of the present application.
According to the method and the device for visualizing the three-dimensional mine model, the current height information and the current breadth information corresponding to the current visual angle are acquired; determining nodes to be displayed in the three-dimensional model of the mine according to the current height information and the current breadth information; determining a node to be loaded according to the node to be displayed and the loaded node; acquiring a data block corresponding to a node to be loaded; and drawing according to the data block corresponding to the node to be loaded. Therefore, model data are loaded and scheduled according to the height information and the breadth information corresponding to the current visual angle, and the loading speed and the model visualization fluency are improved.
Additional aspects and advantages of the present application will be set forth in part in the description which follows and, in part, will be obvious from the description, or may be learned by practice of the present application.
Drawings
The foregoing and/or additional aspects and advantages of the present application will become apparent and readily appreciated from the following description of the embodiments, taken in conjunction with the accompanying drawings of which:
fig. 1 is a schematic flow chart of a three-dimensional mine model visualization method provided in an embodiment of the present application;
FIG. 2 is a schematic diagram of a model block and octree structure according to an embodiment of the present disclosure;
fig. 3 is a schematic flow chart of another mine three-dimensional model visualization method provided in the embodiment of the present application;
fig. 4 is a schematic flow chart of another mine three-dimensional model visualization method provided in the embodiment of the present application;
fig. 5 is a schematic process diagram of a three-dimensional mine model visualization method provided in an embodiment of the present application;
fig. 6 is a schematic structural diagram of a three-dimensional mine model visualization device provided in the embodiment of the present application.
Detailed Description
Reference will now be made in detail to embodiments of the present application, examples of which are illustrated in the accompanying drawings, wherein like or similar reference numerals refer to the same or similar elements or elements having the same or similar function throughout. The embodiments described below with reference to the drawings are exemplary and intended to be used for explaining the present application and should not be construed as limiting the present application.
The mine three-dimensional model visualization method and apparatus according to the embodiments of the present application are described below with reference to the accompanying drawings.
Fig. 1 is a schematic flow chart of a three-dimensional mine model visualization method provided in an embodiment of the present application.
The mine three-dimensional model visualization method provided by the embodiment of the application can be executed by the mine three-dimensional model visualization device provided by the embodiment of the application, and the device can be configured in computer equipment so as to load and dispatch three-dimensional model data according to height information and breadth information corresponding to a current visual angle, thereby improving the loading speed and the model visualization fluency.
As shown in fig. 1, the method for visualizing the three-dimensional mine model includes:
In the application, a user can operate the displayed three-dimensional mine model on a browser, such as zooming in, zooming out, translating and the like.
If the user translates the three-dimensional mine model, for example, moves the three-dimensional mine model horizontally or up and down on a browser, the three-dimensional mine model can be considered to change in breadth. If the user zooms in or zooms out the three-dimensional model of the mine, the user can be considered that the height of watching the mine changes, namely watching the mine at different heights.
Based on this, when the user operates the three-dimensional mine model displayed on the browser, the current height information and the current breadth information corresponding to the current visual angle can be acquired. The current height information is used for indicating height information corresponding to the three-dimensional model to be displayed, and the current breadth information is used for indicating the space range of the three-dimensional model to be displayed.
And step 102, determining nodes to be displayed in the three-dimensional model of the mine according to the current height information and the current breadth information.
In the application, the three-dimensional mine model data can be stored in a pyramid structure tile form, such as an octree structure form. The octree structure comprises a plurality of levels, each level comprises at least one node, the model precision corresponding to each level is different, and the more nodes the level comprises, the higher the model precision corresponding to the level is. In addition, each node corresponds to one data block, and each data block comprises model geometric information and texture information.
Fig. 2 is a schematic diagram of a model block and an octree structure according to an embodiment of the present disclosure.
As shown in fig. 2, the mine three-dimensional model data may be divided using an octree logical structure, and the mine three-dimensional model may be divided into models of a plurality of precisions.
In fig. 2, a second model may be obtained by performing blocking processing on the first model on the left side, each data block in the second model may be continuously divided into eight blocks, and a third model may be obtained (only blocking of one data block in the second model is shown), so as to obtain a corresponding octree structure, as shown in the right diagram in fig. 2. The precision of the first-level model is the lowest, the precision of the second-level model is the second highest, and the precision of the third-level model is the highest. Therefore, when the three-dimensional model data of the mine is stored, the three-dimensional model data can be stored according to an octree structure form.
In the present application, the model precision corresponding to different levels is different, and it can be considered that the model precision corresponding to different heights is different, that is, the height information corresponding to different levels is different. For example, in FIG. 2, the first model corresponds to a height of [1000,750] meters, the second model corresponds to a height of [400,750) meters, and the third model corresponds to a height of (0,400) meters. In addition, because the display size of the browser is limited, if the spatial range of the three-dimensional model of the mine is large, the browser may not be capable of displaying the complete model and only selectively display part of the nodes. That is to say, the three-dimensional mine model displayed by the browser is related to the height information and the breadth information corresponding to the current view angle, so that the nodes to be displayed in the three-dimensional mine model can be determined according to the current height information and the current breadth information corresponding to the current view angle.
According to the method and the device, index information corresponding to the three-dimensional mine model can be loaded, and the nodes to be displayed in the three-dimensional mine model are determined according to the index information, the current height information and the current breadth information. The index information may include height information corresponding to each hierarchy, parent-child relationships among nodes, the number of nodes and node identifiers included in each hierarchy, and the like. The height information corresponding to each level can be a range, that is, the model corresponding to the level is displayed in the corresponding height range.
For example, a level, i.e., a level to be displayed, matched with the current height information may be determined according to the height information corresponding to each level and the current height information. After the hierarchy to be displayed is determined, the nodes to be displayed can be determined from all the nodes of the hierarchy to be displayed according to the breadth information.
It can be understood that if the model space range corresponding to the to-be-displayed hierarchy indicated by the extent information is consistent with the space range displayed by the browser, all nodes in the to-be-displayed hierarchy are to-be-displayed nodes; otherwise, according to the model space range indicated by the breadth information, determining the nodes in the model space range from the nodes of the hierarchy to be displayed as the nodes to be displayed.
And 103, determining the node to be loaded according to the node to be displayed and the loaded node.
After the node to be displayed is obtained, the node to be displayed may be compared with the currently loaded node, and the node to be loaded may be determined according to the node to be displayed and the loaded node. And if not, the nodes to be displayed and the loaded nodes are not matched.
For example, the hierarchy to which the node to be displayed belongs is a second hierarchy, the hierarchy to which the loaded node belongs is a third hierarchy, that is, the currently displayed model is a third hierarchy model, the node to be displayed and the loaded node belong to different hierarchies, and the nodes to be displayed are all the nodes to be loaded.
For another example, the nodes to be displayed are a21, a22, a23 and a24, the loaded nodes are a23, a24, a25 and a26, and it can be seen that the nodes to be displayed, which are a23 and a24, are loaded nodes, then the nodes to be loaded are a21 and a 22.
And 104, acquiring a data block corresponding to the node to be loaded.
After the nodes to be loaded are determined, a request may be sent for each node to be loaded to obtain the data blocks corresponding to the nodes to be loaded.
To improve the efficiency of obtaining data, multiple requests may be sent in parallel, for example, 5 requests at a time to request a data block for 5 nodes. The number of requested concurrencies may be set as required, and the application is not limited thereto.
And 105, drawing according to the data block corresponding to the node to be loaded.
In the step of obtaining the data block corresponding to the node to be loaded, drawing can be performed according to the data block corresponding to the node to be loaded, so that the three-dimensional model of the mine is displayed in the browser.
When the method is realized, if the node to be loaded is consistent with the node to be displayed, drawing is carried out according to the node to be loaded; if the node to be loaded is one part of the node to be displayed, drawing can be performed according to the data block corresponding to the node to be displayed.
For example, the nodes to be displayed are a21, a22, a23 and a24, the nodes to be loaded are a21 and a22, which illustrate that there are data blocks corresponding to a23 and a24, and after the data blocks corresponding to a21 and a22 are acquired, the data blocks corresponding to a21 and a22 and the data blocks corresponding to a23 and a24 are drawn.
For another example, the nodes to be displayed are a21, a22, a23, and a24, and the nodes to be loaded are also a21, a22, a23, and a24, so after the data blocks corresponding to the nodes to be loaded, a21, a22, a23, and a24, respectively, are obtained, the data blocks of the 4 nodes, that is, a21, a22, a23, and a24, are drawn.
In the embodiment of the application, the current height information and the current breadth information corresponding to the current visual angle are obtained; determining nodes to be displayed in the three-dimensional model of the mine according to the current height information and the current breadth information; determining a node to be loaded according to the node to be displayed and the loaded node; acquiring a data block corresponding to a node to be loaded; and drawing according to the data block corresponding to the node to be loaded. Therefore, model data are loaded and scheduled according to the height information and the breadth information corresponding to the current visual angle, and the loading speed and the model visualization fluency are improved.
In practical applications, a user may perform a panning operation on a model currently displayed in a browser, for example, panning left and right or panning up and down, and the model needs to be redrawn. Based on this, a three-dimensional model of the mine can be drawn by the method shown in fig. 3. Fig. 3 is a schematic flow chart of another mine three-dimensional model visualization method provided in the embodiment of the present application.
As shown in fig. 3, the method for visualizing a three-dimensional mine model includes:
In the present application, step 301 is similar to step 101, and therefore will not be described herein again.
And 302, under the condition that the loaded nodes are matched with the current height information, determining nodes to be displayed from the levels to which the loaded nodes belong according to the current breadth information.
In the application, the height information corresponding to each loaded node can be determined according to the attribute information for recording the height information corresponding to each loaded node. If the height information corresponding to the loaded node is consistent with the current height information, namely the loaded node is matched with the current height information, and the level of the currently displayed model is the same as the level of the model to be drawn, the node to be displayed can be determined from each node of the level to which the loaded node belongs according to the current breadth information.
In this application, the current extent information may be determined according to the spatial range of the currently displayed model, the user movement operation direction, and the movement amount.
And step 303, determining a node to be loaded according to the node to be displayed and the loaded node.
And step 304, acquiring a data block corresponding to the node to be loaded.
And 305, drawing according to the data block corresponding to the node to be loaded.
In the present application, steps 303-305 are similar to steps 103-105, and thus are not described herein again.
In the embodiment of the application, when the nodes to be displayed in the three-dimensional mine model are determined according to the current height information and the current breadth information, the nodes to be displayed can be determined from the levels to which the loaded nodes belong according to the current breadth information under the condition that the loaded nodes are matched with the current height information. Therefore, when the user performs translation operation on the model on the currently displayed model, the model can be updated and displayed.
In practical applications, a user may perform an operation of enlarging or reducing a model on the model currently displayed by the browser, and the model also needs to be redrawn. Based on this, a three-dimensional model of the mine can be drawn by the method shown in fig. 4. Fig. 4 is a schematic flow chart of another mine three-dimensional model visualization method provided in the embodiment of the present application.
As shown in fig. 4, the method for visualizing a three-dimensional mine model includes:
In the present application, step 401 is similar to step 101, and therefore is not described herein again.
And 402, under the condition that the loaded node is not matched with the current height information, acquiring a candidate node according to the difference between the height information matched with the loaded node and the current height information.
In the application, the height information corresponding to each loaded node can be determined according to the attribute information for recording the height information corresponding to each loaded node. If the height information corresponding to the loaded node is consistent with the current height information, that is, the loaded node is not matched with the current height information, that is, the currently displayed model level is different from the model level to be drawn, the candidate node can be obtained according to the difference between the height information matched with the loaded node and the current height information.
When the candidate node is obtained, the difference between the model hierarchy to be displayed and the displayed model hierarchy can be determined according to the difference between the height information matched with the loaded node and the current height information, and the candidate node is determined according to the difference and the loaded node.
For example, if the height information of the loaded node matches the range of [200 m, 300 m) and the current height information is 100 m, and it is determined that the currently displayed model is one level lower than the model to be displayed based on the difference between the height information, the child nodes of the loaded node, that is, the nodes of the next level of the loaded node, may be used as candidate nodes.
And step 403, determining a node to be displayed from the candidate nodes according to the current breadth information.
When the model hierarchy changes, the spatial range of the model which can be displayed on the browser also changes, and then the nodes in the spatial range of the model to be displayed, namely the nodes to be displayed, can be determined from the candidate nodes according to the current breadth information.
And step 404, determining a node to be loaded according to the node to be displayed and the loaded node.
And 406, drawing according to the data block corresponding to the node to be loaded.
In the present application, steps 404-406 are similar to steps 103-105 described above, and therefore are not described herein again.
In the embodiment of the application, when the node to be displayed in the three-dimensional mine model is determined according to the current height information and the current breadth information, the candidate node can be obtained according to the difference between the height information matched with the loaded node and the current height information under the condition that the loaded node is not matched with the current height information, and the node to be displayed is determined from the candidate node according to the current breadth information. Therefore, when the user performs an operation of enlarging or reducing the model on the currently displayed model, the model can be updated and displayed.
In an embodiment of the application, in the case that any loaded node is not a node to be displayed, a data block corresponding to any loaded node is deleted. That is, when the loaded node is not a node to be displayed, the data block corresponding to the loaded node may be deleted. Thus, data can be loaded and deleted at any time with different heights and extents.
To further illustrate the above embodiments, the following description is made with reference to fig. 5, and fig. 5 is a process schematic diagram of a three-dimensional mine model visualization method provided in an embodiment of the present application.
As shown in fig. 5, the mine three-dimensional model data may be stored in the form of pyramid-structured tiles, the root node includes a child node array, the child node array includes a plurality of child nodes such as child node 0 and child node 1, each child node is a root node, and includes a child node array, and so on. The nodes can use json to store parent-child relations, have a content attribute and can store model geometric information and texture information.
Based on the stored three-dimensional mine model data, index initialization can be performed to obtain index information corresponding to the three-dimensional mine model. The data node manager may load the index information, and then may perform node determination, for example, determine whether the loaded node matches the height information and the extent information corresponding to the current view. If not, determining the node to be displayed, namely selecting the node, and unloading the loaded node and the content thereof to finish unloading.
The data node associator may perform node relationship analysis, data request, and specify a maximum number of requests to be sent concurrently.
After the node is selected, the node to be displayed is used for node updating, a request is sent to request the content of the node, namely a data block corresponding to the node, the data block can comprise geometric information and texture information, and the content is drawn according to the requested content, so that the browser can update and display the model.
For example, as the viewing angle is adjusted, the height is also changed, if the currently loaded data is not within the height range, the data is updated, the currently loaded data is unloaded, and the data of the previous level or the next level of the current data is loaded according to the parent-child relationship between the nodes.
In order to realize the embodiment, the embodiment of the application further provides a three-dimensional mine model visualization device. Fig. 6 is a schematic structural diagram of a three-dimensional mine model visualization device provided in the embodiment of the present application.
As shown in fig. 6, the three-dimensional mine model visualization device 600 includes:
a first obtaining module 610, configured to obtain current height information and current extent information corresponding to a current viewing angle;
the first determining module 620 is configured to determine a node to be displayed in the three-dimensional mine model according to the current height information and the current breadth information;
a second determining module 630, configured to determine a node to be loaded according to the node to be displayed and the loaded node;
a second obtaining module 640, configured to obtain a data block corresponding to a node to be loaded;
and the drawing module 650 is configured to draw according to the data block corresponding to the node to be loaded.
In a possible implementation manner of the embodiment of the present application, the first determining module 620 is configured to:
determining a to-be-displayed level of the three-dimensional mine model according to index information and current height information corresponding to the three-dimensional mine model;
and determining the nodes to be displayed according to the information of each node in the hierarchy to be displayed and the current breadth information.
In a possible implementation manner of the embodiment of the present application, the first determining module 620 is configured to:
and under the condition that the loaded nodes are matched with the current height information, determining the nodes to be displayed from the hierarchy to which the loaded nodes belong according to the current breadth information.
In a possible implementation manner of the embodiment of the application, under the condition that the loaded node is not matched with the current height information, a candidate node is obtained according to the difference between the height information matched with the loaded node and the current height information;
and determining the nodes to be displayed from the candidate nodes according to the current breadth information.
In a possible implementation manner of the embodiment of the present application, the first determining module 620 is configured to:
under the condition that the loaded node is not matched with the current height information, acquiring a candidate node according to the difference between the height information matched with the loaded node and the current height information;
and determining the nodes to be displayed from the candidate nodes according to the current breadth information.
In a possible implementation manner of the embodiment of the present application, the apparatus may further include:
and the deleting module is used for deleting the data block corresponding to any loaded node under the condition that any loaded node is not the node to be displayed.
It should be noted that the explanation of the embodiment of the mine three-dimensional model visualization method is also applicable to the mine three-dimensional model visualization device of the embodiment, and therefore, the explanation is not repeated here.
In the embodiment of the application, the current height information and the current breadth information corresponding to the current visual angle are obtained; determining nodes to be displayed in the three-dimensional model of the mine according to the current height information and the current breadth information; determining a node to be loaded according to the node to be displayed and the loaded node; acquiring a data block corresponding to a node to be loaded; and drawing according to the data block corresponding to the node to be loaded. Therefore, model data are loaded and scheduled according to the height information and the breadth information corresponding to the current visual angle, and the loading speed and the model visualization fluency are improved.
In order to implement the foregoing embodiments, an embodiment of the present application further provides a computer device, including a processor and a memory;
the processor reads the executable program codes stored in the memory to run programs corresponding to the executable program codes, so as to realize the three-dimensional mine model visualization method according to the embodiment.
In order to implement the foregoing embodiment, the present application further proposes a non-transitory computer-readable storage medium, on which a computer program is stored, and when the computer program is executed by a processor, the computer program implements the three-dimensional mine model visualization method according to the foregoing embodiment.
In the description of the present specification, the terms "first", "second" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implying any number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one such feature. In the description of the present application, "plurality" means at least two, e.g., two, three, etc., unless specifically limited otherwise.
Although embodiments of the present application have been shown and described above, it is understood that the above embodiments are exemplary and should not be construed as limiting the present application, and that variations, modifications, substitutions and alterations may be made to the above embodiments by those of ordinary skill in the art within the scope of the present application.
Claims (10)
1. A three-dimensional mine model visualization method is characterized by comprising the following steps:
acquiring current height information and current breadth information corresponding to a current visual angle;
determining nodes to be displayed in the three-dimensional model of the mine according to the current height information and the current breadth information;
determining a node to be loaded according to the node to be displayed and the loaded node;
acquiring a data block corresponding to the node to be loaded;
and drawing according to the data block corresponding to the node to be loaded.
2. The method according to claim 1, wherein the determining the node to be displayed in the three-dimensional model of the mine according to the current height information and the current breadth information comprises:
determining a to-be-displayed level of the three-dimensional mine model according to index information corresponding to the three-dimensional mine model and the current height information;
and determining the nodes to be displayed according to the information of each node in the hierarchy to be displayed and the current breadth information.
3. The method according to claim 1, wherein the determining the node to be displayed in the three-dimensional model of the mine according to the current height information and the current breadth information comprises:
and under the condition that the loaded nodes are matched with the current height information, determining the nodes to be displayed from the levels to which the loaded nodes belong according to the current breadth information.
4. The method according to claim 1, wherein the determining the node to be displayed in the three-dimensional model of the mine according to the current height information and the current breadth information comprises:
under the condition that the loaded node is not matched with the current height information, acquiring a candidate node according to the difference between the height information matched with the loaded node and the current height information;
and determining a node to be displayed from the candidate nodes according to the current breadth information.
5. The method of any of claims 1-4, further comprising:
and under the condition that any loaded node is not the node to be displayed, deleting the data block corresponding to the loaded node.
6. A three-dimensional model visualization device for a mine, comprising:
the first acquisition module is used for acquiring current height information and current breadth information corresponding to a current visual angle;
the first determining module is used for determining nodes to be displayed in the three-dimensional mine model according to the current height information and the current breadth information;
the second determining module is used for determining the nodes to be loaded according to the nodes to be displayed and the loaded nodes;
the second acquisition module is used for acquiring the data block corresponding to the node to be loaded;
and the drawing module is used for drawing according to the data block corresponding to the node to be loaded.
7. The apparatus of claim 6, wherein the first determining module is to:
determining a to-be-displayed level of the three-dimensional mine model according to index information corresponding to the three-dimensional mine model and the current height information;
and determining the nodes to be displayed according to the information of each node in the hierarchy to be displayed and the current breadth information.
8. The apparatus of claim 6, wherein the first determining module is to:
and under the condition that the loaded nodes are matched with the current height information, determining the nodes to be displayed from the levels to which the loaded nodes belong according to the current breadth information.
9. A computer device comprising a processor and a memory;
wherein the processor executes a program corresponding to the executable program code by reading the executable program code stored in the memory, so as to realize the three-dimensional mine model visualization method according to any one of claims 1 to 5.
10. A non-transitory computer-readable storage medium having stored thereon a computer program, wherein the program, when executed by a processor, implements the method for visualizing the three-dimensional model of a mine according to any one of claims 1-5.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110926775.1A CN113656514A (en) | 2021-08-12 | 2021-08-12 | Visualization method and device for three-dimensional model of mine |
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