虚拟装配环境中基于对象的三维物体拾取方法  

Method of 3D Object Pickup in Virtual Assembly Environment

作　　者：张建民[1] 张连斗[1] 朱均[1] 孙国基[1] 

机构地区：[1]西安交通大学电子与信息工程学院,西安710049

出　　处：《西安交通大学学报》2003年第6期555-559,共5页Journal of Xi'an Jiaotong University

基　　金：国家自然科学基金资助项目 (59990 572 )

摘　　要：基于对象模型提出了虚拟装配环境中三维物体快速拾取算法、实现方法和步骤,该算法不依赖于OpenGL或Direct3D环境,也不需要将所有模型数据转换到同一模型空间,而是根据虚拟环境中使用的矩阵对投影射线作反变换,通过射线与模型相交测试来拾取物体,其优点是节省大量的计算时间和存取空间.在虚拟装配系统中,对随意放置的模型进行了测试和验证,结果表明所提出的快速拾取算法、方法和步骤是有效的,为装配环境中进行物体移动、旋转,动态装配,信息查询等操作奠定了基础.An algorithm, implementing method and processing of fast 3D object pickup are proposed based on object oriented techniques. The algorithm is independent of the OpenGL or Direct 3D environment and need not translate models to same coordinate system. Only the ray is translated to model space to do intersect based on the used matrix. The advantage of algorithm is that the computing time and storage are efficient. Meanwhile, some test results are given. The evidence suggests that the method is effective for object pick, motion, dynamic virtual assembly and information search.

关 键 词：拾取算法 虚拟装配 信息查询 

分 类 号：TP391.73[自动化与计算机技术—计算机应用技术]