Visual progressive model browsing method in three-dimensional scene

A technology of 3D scenes and 3D models, applied in 3D image processing, image data processing, instruments, etc., can solve the problems that restrict the development and popularization of 3D GIS, excessive memory texture and grid data, and weakened rendering and drawing capabilities. Achieve the effect of avoiding memory and video memory, smooth experience, and avoiding repeated loading

Active Publication Date: 2021-02-23
CHONGQING GEOMATICS & REMOTE SENSING CENT
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  • Claims
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AI Technical Summary

Problems solved by technology

However, a large amount of data causes many problems, including data network transmission congestion, excessive memory usage, reduced system stability, excessive texture and grid data in video memory, serious consumption of video memory resources, weakened rendering capabilities, etc.
[0004] In addition, when viewing a 3D scene, a large number of models are difficult to draw and render quickly in real time, resulting in delays and freezes in the display screen. If the frame rate of the screen is lower than 24 frames, it will seriously affect the user experience and restrict the rapid development of 3D GIS. Development and popularization have become an urgent industry problem to be solved

Method used

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Embodiment Construction

[0053] The specific implementation manner and working principle of the present invention will be further described in detail below in conjunction with the accompanying drawings.

[0054] Such as figure 1 As shown, a visually progressive model browsing method in a three-dimensional scene includes the following steps:

[0055] Step 1: Create grid cells on a global scale;

[0056] Since this embodiment is based on grid model browsing, grid units need to be created first. The construction method of the grid unit is:

[0057] Set the size of the cell, according to the level of the map, calculate from the zero point of latitude and longitude, generate a grid cell on a global scale (global range is longitude [-180,180] and latitude [-90,90]), and ensure that any in the 3D scene Each location has a unique corresponding grid cell.

[0058] In the generated grid, set the grid unit code and ID number, and record the latitude and longitude information where the grid is located. For s...

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Abstract

The invention discloses a visual progressive model browsing method in a three-dimensional scene. The visual progressive model browsing method comprises the following steps: creating grid cells in a global range; progressively loading the grid units and the attribute information thereof in the view field range of the camera in the three-dimensional scene; progressively loading the three-dimensionalmodel data corresponding to the loaded grid units; progressively filtering, detecting and rendering the loaded three-dimensional model data; and displaying the rendered three-dimensional model data according to the change of the field of view of the camera, and progressively unloading the browsed three-dimensional model data. The method has the remarkable effects that only the required three-dimensional model data are loaded by removing a large amount of redundant data, so that the drawing burden of the system is reduced, and the loading and rendering efficiency is improved.

Description

technical field [0001] The invention relates to the technical field of three-dimensional scene display, in particular to a visually progressive model browsing method in a three-dimensional scene. Background technique [0002] With the continuous advancement of 3D city construction, the traditional GIS application based on 2D expression can no longer meet the actual application needs. Driven by the actual demand, 3D GIS has become a key means of expressing geospatial information. 3D GIS can not only depict spatial information realistically and vividly, but also describe the structural relationship between spatial entities in detail. It has the characteristics of high fidelity, has been widely recognized, and gradually replaced the traditional two-dimensional expression in applications. However, with the expansion of 3D model data scale and the improvement of modeling accuracy, the surge of 3D model data has brought severe challenges to the processing capabilities of graphics...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G06T15/00G06F9/451
CPCG06T15/00G06F9/451
Inventor 刘洪波张泽烈梁星李林连蓉程宇翔袁杰祺余静梁均军余洋曾攀安丽超陈阳瞿晓雯秦瑛歆
Owner CHONGQING GEOMATICS & REMOTE SENSING CENT
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