基于边界分割的STL模型三维分段  

The Three Dimensional Decomposition of STL Model Based on the Splitting by the Blocked Boundaries

作　　者：黄常标[1] 刘斌[1] 江开勇[1] 林俊义[1] 

机构地区：[1]华侨大学厦门市数字化视觉测量重点实验室,厦门361021

出　　处：《机械科学与技术》2014年第6期870-874,共5页Mechanical Science and Technology for Aerospace Engineering

基　　金：国家自然科学基金项目(51105150;50975100);福建省科技计划重点项目(2008H0085);华侨大学中青年教师科研提升计划项目(ZQN-PY102)资助

摘　　要：针对分段注射/雕刻复合快速成型工艺的三维分段要求,提出一种STL三角网格模型的三维分段方法。以改进的翼边数据结构为基础,基于边界扩展法将STL模型分解为多个子模型,各子模型只包含相同类型面片或者垂直类型面片;以边对为基础来识别各子模型中的被遮挡边界线,由此生成垂直扫描面来分割子模型,进一步获得Z轴方向上无干涉的子模型。实例证明算法能有效实现STL三角网格模型的三维分段以满足工艺要求。The three dimensional decomposition algorithms for the STL model is presented for the Decomposed Injection Sculpturing（ DIS） hybrid Rapid Prototyping. Based on the modified winged edge data structure,a STL model is decomposed into several sub-models by means of the extended boundary algorithms. Every sub-model comprises the same type facets or vertical facets. The blocked boundaries are distinguished from a sub-model based on the edge-pair,and then the sub-model is split by the sweep planes constructed by the blocked boundaries. In result,all sub-models have no blocked facet when looking in the direction of Z axis. The example illustrates that the algorithms can effectively decompose the STL model for DIS.

关 键 词：复合快速成型 STL模型 三维分段 边界扩展法 边对 

分 类 号：TP391.7[自动化与计算机技术—计算机应用技术]