共查询到17条相似文献,搜索用时 18 毫秒
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本文分析了基于OpenGL显示STL格式的优势圾STL格式实体在人机交互式曲面拼接中的应用问题.并结合STL文件格式的特点,提出了快速去除STL面片中冗余数据的方法,使得拼接过程的计算量大大减少,提高了可视化曲面拼接的效率。 相似文献
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王丽丽 《机械制造与自动化》2008,37(3)
针对以STL文件描述的网格模型,详细分析了STL文件模型的几何数据结构特性;提出了采用顶点一环邻域的拓扑结构对STL模型进行快速重建;对基于Hash和红黑树的冗余点合并算法进行了分析,分别设计了适应于两者存储节点的数据结构。实例分析表明本文算法在冗余顶点合并和邻域拓扑重建在效率上有着良好的体现。 相似文献
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为满足CAD软件与快速成形领域的数据交换需要,提出了一种Parasolid数据的STL变换方法。利用Parasolid建模核心的PK-TOPOL-facet()函数将Parasolid模型按STL文件规则进行三角网格化,通过返回的拓扑信息构建三角面片与它的顶点和法向量的拓扑关系,并由此生成了STL文件。应用实例和Solidworks软件诊断表明,采用该方法可以将Parasolid文件变换为STL文件,生成的STL模型中无错误面和缝隙存在。 相似文献
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Chua Chee Kai Gan G. K. Jacob Tong Mei 《The International Journal of Advanced Manufacturing Technology》1997,13(8):571-576
The STL (STereoLithography) file format, as developed by 3D Systems, has been widely used by most Rapid Prototyping (RP) systems and is supported by all major computer-aided design (CAD) systems. However, it is necessary to improve the STL format to meet the development needs of RP technologies. In Part 1, several existing and proposed formats have been discussed. This paper, Part 2, will present an improved interface between CAD and RP systems. The new interface is a file format that supports the STL format, removes redundant information in the STL format and adds topological information to balance storage and processing cost. In addition to supporting facet boundary models, the new interface supports precise models by using the edge-based boundary representation. This paper discusses the design considerations of the new interface and data structures for both facet models and precise models. Finally, a comparison of the new interface and the STL file format will be made. 相似文献
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S.-H. Huang L.-C. Zhang M. Han 《The International Journal of Advanced Manufacturing Technology》2003,21(1):15-19
The STL file, which is de facto standard for the rapid prototyping industries, has too large a file size. This paper proposes
an improved interface between CAD and rapid prototyping systems, i.e. a CS (compressed STL) file that has very low data storage
redundancies and is completely compatible with the STL file. The CS file is about a quarter of the size of the original binary
STL file, without any model information loss. This is very suitable for file transferring via the Internet. Removing coordinate
data of duplicate vertices, bit-compression technology, and a comparison of the size and compressed performance of the STL
and the CS are also discussed.
ID="A1"Correspondance and offprint requests to: Dr Li-Chao Zhang, Rapid Prototyping Building, State Key Laboratory of Plastic Forming Simulation and Die and Mould Technology,
Huazhong University of Science and Technology, Wuhan, Hubei, 430074, PR China. E-mail: elegantteac@yahoo.com 相似文献
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S. Boralingiah C. K. Chua T. Ong S. M. Chou 《The International Journal of Advanced Manufacturing Technology》1999,15(2):119-126
This paper presents the technique used for converting a 3D ArtCAM™ relief file into the stereolithography (STL) format. This
3D file is obtained from a 2D picture using a 3D CNC engraving software called ArtCAM™.
The problem is to convert the 3D relief files into an STL format without compromising the accuracy and details of therelief.
This paper discusses the size of the files which have been converted, and steps taken to reduce the file size by reducing
the number of triangles or facets in the STL file. The discussion involves the verification of the converted model by comparing
it with the original relief. The problems associated with the reduction of triangles when the file has been converted to STL
format are also discussed. 相似文献
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基于STL文件的实体分割算法研究 总被引:10,自引:0,他引:10
由于快速成型机加工尺寸的限制,难于制造尺寸较大的零件。针对这一问题本文提出一种基于STL文件格 式的实体分割算法,对STL文件分割过程中的关键问题进行了详细地论述,包括:截面轮廓的生成,截交三角面片的 处理和截面轮廓的三角化算法;通过对STL文件的分割处理,提高了快速成型系统对大尺寸零件的制造能力。 相似文献