Digital lake three-dimensional visualized simulation method and simulation platform based on OSG

Abstract

The invention provides a digital lake three-dimensional visualized simulation method and simulation platform based on an OSG. The digital lake three-dimensional visualized simulation method includes the following steps that a three-dimensional digital terrain model, a ground feature model and an earth surface derivative model of the region where a lake is located are built; the ground feature model and the earth surface derivative model are loaded to the corresponding geographical positions of the three-dimensional digital terrain model to obtain a three-dimensional digital terrain and geographical environment scene; based on the three-dimensional digital terrain and geographical environment scene, an OSD module is used as a bottom layer three-dimensional rendering engine for scene rendering; meanwhile, an OsgOcean module is utilized to further simulate a simulation rendering water current and weather effect to obtain a three-dimensional digital lake terrain environment scene; a water current scene and a weather effect scene obtained through simulation are updated under the control of a man-machine interaction mechanism. The digital lake three-dimensional visualized simulation method and simulation platform have the advantages of being convenient to operate, easy to expand, efficient, and capable of achieving real-time performance and meeting the requirement for wide-range terrain and mass spatial data three-dimensional visualized simulation.

Description

technical field [0001] The invention belongs to the technical field of virtual reality, and in particular relates to an OSG-based three-dimensional visualization simulation method and simulation platform for a digital lake. Background technique [0002] Digital lake is an important regional level of digital earth, which plays an important role in flood control and disaster reduction, sustainable development, energy utilization and so on. In recent years, with the development of 3D visualization simulation technology, the data 3D visualization of digital lake mathematical model was born. That is: the three-dimensional presentation of the main terrain and landforms and various data information are displayed through three-dimensional visualization means, so as to describe the past, present and future behaviors of the lake, such as: flood dynamic evolution, dam failure simulation, water pollution simulation, real-time data Integration of related water conservancy business model...

AI Technical Summary

Problems solved by technology

[0003] However, in the existing 3D visualization simulation process of digital lakes, traditional 3D rendering engines such as OpenGL (Open Graphics Library) and DirectX (full name: Direct eXtension, DX for short) are mainly used for rendering, which mainly have the following disadvantages: 1. Object-oriented low-level engine, it is difficult to design scenes and operate objects in the scene; ② It is difficult to write complex scenes using basic primitives; ③ It does not support optimized rendering functions such as LOD (Level of detail) and dynamic clipping; ④ For large Inefficient rendering of range terrain and lakes

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