摘要
本文在上机实践的基础上,探讨了计算机辅助设计中几何造型的一种方法。借助于几何逼近原理的三点定义二次曲线方程所形成的自由曲线作为母线,函数曲线作为纬线,利用计算机控制任意视角的三维几何网格体的图形输出,把复杂的几何造型中的网格体在计算机内表示的数据和在实用算法中所采用的数据形式统一起来,并在型体的表示上体现了几何完整性。用本文提供的设计方法所设计的复杂曲面网格体,能绘制出用人工无法想象和绘制的效果图(以轴测形式),并能根据确定的效果图,输出形体的控制点坐标,进行实物造型。提供的程序在PC5500(或APPLE)计算机和SPL—400型绘图机上通过。
A method of geometric forming in computer aid design was described . The basic line of the grid body was the free line produced by a three point defined conic formulate by using of the geometric approaching theory. The.function line was taken as the latitudinal line of the grid body. The data representing the grid body of the geometric form was unified with the data produced b y numeric method with the output of three dimensional grid body of the geometric form controlled by the computer in any sight angle. The complex grid body with curved surface designed by the method described in the paper could be used to plot any graphic (axle direction), which can not be imagined and plotted fay manual method. From the graphic plotted, the coordinates of the control points could be determined and outputted. The body form could be then produced. The program execution was performed on PC 5500 (or APPLE) computer and SPL-400 plotter.
出处
《黑龙江八一农垦大学学报》
1990年第1期53-58,共6页
journal of heilongjiang bayi agricultural university
关键词
计算机应用
网格体
几何造型
Grid body. Geometric form Computer application
