检索规则说明:AND代表“并且”;OR代表“或者”;NOT代表“不包含”;(注意必须大写,运算符两边需空一格)
检 索 范 例 :范例一: (K=图书馆学 OR K=情报学) AND A=范并思 范例二:J=计算机应用与软件 AND (U=C++ OR U=Basic) NOT M=Visual
作 者:秦阳[1] 蔺宏伟[1] 冼楚华[1] 高曙明[1]
机构地区:[1]浙江大学CAD8LCG国家重点实验室,杭州310058
出 处:《计算机辅助设计与图形学学报》2011年第5期763-770,共8页Journal of Computer-Aided Design & Computer Graphics
基 金:国家自然科学基金(60970150,60933008,60736019);浙江省自然科学基金(Y1090416)
摘 要:为了通过并行化技术提高隐式曲面绘制和网格化的速度,提出一种基于GPU并行计算架构的区间分析方法来网格化和绘制隐式曲面.首先按照给定的绘制分辨率将绘制空间离散成体素表示,充分利用GPU的并行计算能力,采取区间分析方法并行计算隐函数在所有体素上的取值区间,从而确定出包含隐函数零等值面的特征体素;进一步,抽取特征体素的外表面对其进行拓扑校正,确保得到的网格是二维流形;然后使用Laplace操作对这个网格进行光滑处理,得到隐式曲面的网格表示.大量实验结果表明,隐式曲面的网格化和绘制时间一般小于0.1 s,达到了实时化的水平.Implicit surface has a simple expression,and meets the smoothness requirements naturally.However,rendering implicit surface is computationally complex and inefficient.More importantly,it is difficult to control and adjust the shape of the implicit surface.Therefore,the modeling technology of implicit surface is far from being practical.To overcome these deficiencies,this paper presents an interval analysis method for rendering and polygonizing implicit surfaces based on GPU parallel computing architecture,which greatly improves the computational efficiency and rendering speed.The method first divides the rendering-space into voxels with a given resolution.Then,taking full advantage of GPU's parallel computing ability,the algorithm uses an interval analysis method to compute the range of implicit function in every voxel in parallel to find the feature-voxels which contain the zero-isosurface of the implicit function.Next,we extract the outer surface of feature-voxels,and handle it with topology-correction operations to ensure that the mesh is two-dimensional manifold;at last,using Laplace operation to smooth the mesh,we get the mesh representation of the implicit surface.A large number of experiments have been done,and the results show that the time of the implicit surface rendering and mesh smoothing are usually in millisecond magnitude which achieves the real-time level.
分 类 号:TP391[自动化与计算机技术—计算机应用技术]
正在载入数据...
正在载入数据...
正在载入数据...
正在载入数据...
正在载入数据...
正在载入数据...
正在载入数据...
正在链接到云南高校图书馆文献保障联盟下载...
云南高校图书馆联盟文献共享服务平台 版权所有©
您的IP:216.73.216.43