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3D terrain rendering technology research and waterfalls

Author: LiaoJian
Tutor: ChenXiaoWei
School: Guizhou University
Course: Applied Computer Technology
Keywords: Virtual Reality Three-dimensional terrain 3D waterfall Data block Atomization Particle system Collision detection
CLC: TP391.41
Type: Master's thesis
Year: 2009
Downloads: 22
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Abstract


3D terrain and waterfalls rendering technology is one of the key technologies in the field of virtual reality, geographic information systems, simulation system. This paper studies the history of the development and current status of the virtual reality technology and three-dimensional scene rendering techniques, details of the real-time rendering of 3D graphics technology and development tools. The main research work are as follows: (1) model of water movement optimization waterfall real-time rendering method of the already atomized water mechanical properties and waterfall atomization formation mechanism based on a physical model of the movement of water falls further optimization, then waterfall motion drawing method based on particle system, combined with the view-dependent LOD technology, hierarchical bounding box technology, clustering tree and OpenGL display list technology to accelerate the waterfall water movement drawing and roaming, while taking advantage of the components of DirectXAudio Falls analog audio system, immersive virtual waterfall system. (2) a large-scale topographic data block storage management method first used the method based on the linear quadtree large-scale terrain block large-scale topographic data the block boundary defects block processing, greatly reducing the data storage capacity, the same level of data block can be divided into blocks into the same resolution, to avoid the type according to the viewpoint selection LOD model. Then, using the SQL Server storage and management of terrain data block, and use of the ADO technology for large-scale topographic database operate, so that only in the viewpoint around the block of data memory resident, greatly reducing the pressure of the system memory, data sharing and network the point of view of users concurrent access to the database to store and manipulate terrain data is also a good choice. (3) a large-scale topographic data block indexing and access method This method first proposed the concept of large-scale topographic data logic block, the block number of the calculation method and the neighborhood block search method, then on the block logical location Number and linear quadtree block number many-to-one mapping between Finally, based on the relationship between this mapping, the the linear quadtree data block field block search algorithm. The index and access the algorithm is very simple, easy to program. (4) in the local area network conditions to achieve a three-dimensional terrain mapping and roaming in the local area network conditions, combined with the above two methods to complete a quick access to the large-scale topographic data sub-blocks, storage, and field block in the drawing process used in the atomization dynamic loading technology to achieve real-time rendering of large scale terrain roaming, good rendering efficiency and visual effects.

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CLC: > Industrial Technology > Automation technology,computer technology > Computing technology,computer technology > Computer applications > Information processing (information processing) > Pattern Recognition and devices > Image recognition device
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