摘要
在基于球面剖分的全球地形数据组织模型基础上,实现了一种视点相关的全球地形数据快速调度与可视化的算法。提出了一种基于区块纹理分辨率的自适应目标层次模型提取方法,能够快速准确地得到视点相关的正确细节模型,且算法的时间空间复杂度与全球地形模型的数据量无关。进而通过利用区块结构的一致性进行高效的外存数据调度,尽可能地减少了系统I/O带来的性能瓶颈,在实现数据重利用的同时很好地管理了内存消耗。实验表明,基于该算法可以实现全球地形的高效绘制,并且对硬件配置要求很低,具有很好的实用性。
An efficient method for out-of-core global terrain rendering was realized based on a spherical-block data model. Firstly, an adaption LOD selection algorithm was proposed based on block resolution, whose complexity was independent of the amount of global terrain data. Then, an efficient out-of-core strategy was employed to reduce the I/O workload, which took advantage of the coherency of the block structure. With regard to the performance, it remains favourable compared to current other approaches, while does not rely on the powerful graphic hardware.
出处
《系统仿真学报》
CAS
CSCD
北大核心
2012年第1期146-149,共4页
Journal of System Simulation
基金
国家自然科学基金(61070140)
