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Urban three-dimensional model data preprocessing method suitable for high-efficiency rendering

A technology of data preprocessing and 3D model, applied in the field of geographic spatial information system, can solve the problems of high hardware requirements and poor rendering effect, and achieve the effect of reducing the number and improving the efficiency

Inactive Publication Date: 2016-09-21
ZHEJIANG KELAN INFORMATION TECH CO LTD
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Problems solved by technology

[0003] Aiming at the disadvantages of high hardware requirements and poor rendering effect in the prior art, the present invention provides a data preprocessing method for urban 3D models suitable for efficient rendering

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  • Urban three-dimensional model data preprocessing method suitable for high-efficiency rendering
  • Urban three-dimensional model data preprocessing method suitable for high-efficiency rendering
  • Urban three-dimensional model data preprocessing method suitable for high-efficiency rendering

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Embodiment Construction

[0019] The present invention will be further described in detail below in conjunction with the accompanying drawings and embodiments.

[0020] Such as Figure 1 to Figure 3 As shown, (1) import and analyze the model objects to be loaded in batches through the IO read-write plug-in, and obtain the center position, maximum value and minimum value of the model object as the AABB bounding box;

[0021] (2) Use the spatial R tree index method to build a tree index structure for the 3D model that has obtained the bounding box, center position, maximum value, and minimum value, and construct an R tree according to the tree index structure, in which each node contains the corresponding space The smallest cuboid of the object;

[0022] (3) Divide the built R tree into space pages from the leaf nodes upwards through the paging technology, and use each divided space page as an independent small R tree, and record the current level of information and information during the process of div...

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Abstract

The invention relates to the field of geographic space information systems, and discloses an urban three-dimensional model data preprocessing method suitable for high-efficiency rendering. The method comprises the steps: importing to-be-loaded models in batch and carrying out analysis; generating a corresponding R tree through employing an R tree space characteristic organization model; dividing the R tree into a plurality of small R trees through the paging technique; carrying out the detailed multilayer LOD processing of each small R tree; carrying out the further optimization of the generated multilayer LOD small R trees, and exporting the generated multilayer LOD small R trees. According to the invention, the method enables a large number of models to be reorganized through the paging technique. When a user carries out scene rendering, the user just needs to load the models in a view range, thereby greatly reducing the number of rendered objects, and improves the real-time visualization efficiency of urban three-dimensional model data.

Description

technical field [0001] The invention relates to the field of geographic space information systems, in particular to a method for preprocessing urban three-dimensional model data suitable for high-efficiency rendering. Background technique [0002] In the application of 3D digital city, it is a relatively difficult problem to render massive city model data efficiently and in real time. Due to the limited hardware performance of ordinary computer graphics cards, optimizing the rendering efficiency of massive city model data at the software level has become an urgent problem. Contents of the invention [0003] Aiming at the disadvantages of high hardware requirement and poor rendering effect in the prior art, the present invention provides a method for preprocessing urban three-dimensional model data suitable for efficient rendering. [0004] In order to solve the above technical problems, the present invention is solved through the following technical solutions. [0005] A...

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Application Information

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IPC IPC(8): G06T17/05
CPCG06T17/05
Inventor 刘凤芹俞蔚
Owner ZHEJIANG KELAN INFORMATION TECH CO LTD
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