基于光线投射的全GPU实现的地形渲染算法

地形渲染算法需要处理大量的地形及纹理数据，影响三维动画显示的流畅性和性能提高。随着GPU绘制能力提高，CPU与GPU的负载失衡逐渐成为制约性能提高的瓶颈。结合现代GPU体系结构，在GPU上实现了基于光线投射（Ray Casting）的地形渲染算法。算法简化了Ray Casting算法，把LOD策略和预裁剪统一到GPU中实现，保证了CPU和GPU之间的负载平衡，同时简化了应用程序的编制。为获得较好效果，还采用查找表（Lookup—Table）的实时纹理合成算法合成纹理，进一步降低了CPU处理纹理数据的开销。实验表明，本文算法不仅充分利用了GPU的处理能力，还降低了CPU负载，提高了动态三维重建的帧刷新率，并获得较逼真的渲染效果。

Ray Casting Based Terrain Rendering Algorithm Fully Implemented with GPU

Terrain render algorithm plays an important role in flight and ship simulator.Terrain render algorithm,which needs processing large amount of terrain and texture data,always causes scene rendered un-fluently.Since modern GPU has a powerful rendering ability,the un-balance between CPU and GPU has become a bottleneck of terrain rendering.A new algorithm based on ray casting is proposed in this paper.The algorithm simplifies traditional ray casting algorithm,implements both LOD and pre-cull strategy with GPU.I...