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Three-dimensional (3D) terrain model data organization method oriented to network interactive visualization

A 3D model and network interaction technology, applied in the computer field, can solve the problems of no effective organization and scheduling of models, and low loading efficiency of 3D models, and achieve the effects of improving loading efficiency, improving visualization efficiency, and improving rendering speed

Inactive Publication Date: 2011-08-03
WUHAN UNIV
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Problems solved by technology

Although the method of loading 3D models through the network can effectively load 3D models from the network, it has the same disadvantages as the client loading method. It does not use the characteristics of 3D visualization scheduling to effectively organize and schedule the models. low efficiency

Method used

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  • Three-dimensional (3D) terrain model data organization method oriented to network interactive visualization
  • Three-dimensional (3D) terrain model data organization method oriented to network interactive visualization
  • Three-dimensional (3D) terrain model data organization method oriented to network interactive visualization

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Embodiment Construction

[0011] The technical solutions of the present invention will be described in detail below in conjunction with the examples.

[0012] Step 1, the original ground 3D model data file is preprocessed. Embodiment comprises the following specific steps:

[0013] Step 1.1 Create two arrays, which are used to store template information and model information in the file respectively.

[0014] Step 1.2 creates a map container to store material information, and sets the material name as the key of the map container.

[0015] Step 1.3 reads in the original .x file, which is a large file containing multiple individual models, such as all models in a scene. The present invention refers to a single model as a three-dimensional model individual, and each three-dimensional model individual corresponds to an actual individual with independent attributes in the real world, such as a house or a road.

[0016] Step 1.4 Store the template information of the large file and each single model infor...

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Abstract

The invention provides a three-dimensional (3D) terrain model data organization method oriented to network interactive visualization. The method comprises the following steps: effectively decomposing the externally generated 3D model data, extracting terrain center points from the decomposed 3D model individuals with independent attributes, and taking the points as origins of coordinates for coordinate system conversion; establishing grid indexes the grid spacing of which is consistent with that of terrain grids for all the terrain center points of the 3D models; and when a 3D client side loads the model data in a network environment, loading the 3D models at corresponding LODs (level of detail) from a network, wherein, the center points of the models meet the visual condition. In the method, by adopting the loading mode, the one-time loaded data volume of the network models can be reduced maximally, the 3D terrain models at the corresponding LODs can be called based on the visual condition, and the loading and rendering efficiency of the large-scale 3D models in a network-based 3D visualization system can be greatly improved, thus promoting the deep application of the network-based 3D visualization system in various industries.

Description

technical field [0001] The invention belongs to the field of computers, in particular to a large-scale ground three-dimensional model data organization method for network interactive three-dimensional visualization. Background technique [0002] The large-scale ground 3D model is an important visualization content in the network-based 3D geographic environment visualization system. Through the drawing of the large-scale ground 3D model, the computer can be used to construct a realistic local area three-dimensional environment, which can be applied to urban planning and evaluation and other fields. It is a key technical problem in the current network 3D geographic environment visualization system. [0003] At present, in common methods, the local loading method of the client is generally adopted, that is, the 3D model data exists locally, and the large-scale ground 3D model data is loaded and drawn in the 3D visualization system through the client. The method of loading the ...

Claims

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Application Information

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IPC IPC(8): G06T17/05G06T15/00
Inventor 熊汉江龚健雅戴雪峰郑先伟杜凯
Owner WUHAN UNIV
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