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This paper presents an efficient method to trace secondary rays in depth-of-field (DOF) rendering, which significantly enhances realism. Till now, the effects by secondary rays have been little addressed in real-time/interactive DOF rendering, because secondary rays have less coherence than primary rays, making them very difficult to handle. We propose novel measures to cluster secondary rays, and take a virtual viewpoint to construct a layered image-based representation for the objects that would be intersected by a cluster of secondary rays respectively. Therefore, we can exploit coherence of secondary rays in the clusters to speed up tracing secondary rays in DOF rendering. Results show that we can interactively achieve DOF rendering effects with reflections or refractions on a commodity graphics card. 相似文献
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1需量电价的特点 (1)基本电价高。在深圳电价中,高需求用电基本电价为每月每千瓦44元,大量用电基本电价为每月每千瓦24元。 相似文献
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在GPU上进行多片元效果的绘制,已有的方法往往需要对模型进行多遍的数据读取,以进行片元的有效排序.由于往GPU传输数据的带宽限制,多遍的数据读取严重制约了绘制效率的提高.虽然,随着CUDA的出现,已有方法可将数据完全装入GPU进行多片元效果的绘制,但受存储空间的限制,难以处理大规模的模型.对此,文中提出一种只需要单遍数... 相似文献
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应用"门槛理论",以湖南韶山市韶山乡南部的韶山村为例,将门槛思维方法运用于新农村的整治规划之中,深入分析农村的门槛限制条件,依据分析结果,提出更合理、更具价值的整治规划措施. 相似文献
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在介绍了峰谷电价政策基础上,通过建立数学模型来描绘不同电力消耗模式下的企业用电成本变化特点,向企业展示了移峰填谷降低用电成本的巨大潜力。 相似文献
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