摘要
非均匀有理Ｂ样条（ＮＵＲＢＳ）曲面由于在复杂零件的设计制造中表现出众多的优点，从而在ＣＡＤ／ＣＡＭ系统中得到广泛的应用．本文在介绍ＰＨＪＧＳ中ＮＵＲＲＳ曲线曲面方法及特点的基础上，讨论了ＮＵＲＢＳ曲线的次数、节点矢量及权的选取．并结合造型系统的开发，提出了一种基于ＮＵＲＢＳ曲线曲面的准Ｂ－Ｒｅｐ造型方法，最后，给出了在ＩＢＭＲＩＳＣ／６０００３２０Ｈ工作站上实现的应用实例．
NURBS(Non-Uniform Rational B-Spline) curves or surfaces are used widely in CAD/CAM systems because they have many advantages in the design and manufacturing of complex workpiece. This paper, on the basis of introducing the method and characteristics of NURBS curves or surfaces in PHIGS, discusses the degree of NURBS curves, knot vectorr and the selection of weights of control vertices, and presents pseudo B-Rep modelling method basedon NURBS curves of surfaces. At last an example implemented on IBM RISC/6000 320H workstation is given.
出处
《哈尔滨工业大学学报》
EI
CAS
CSCD
北大核心
1996年第1期108-111,共4页
Journal of Harbin Institute of Technology
