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一、2—D图形输入 平面图形,也叫2—D(2维)图形。给定一个注全尺寸的2—D图形,如图1,如何通过一定的方法输入少量数据,使计算机自动地求出各结点的坐标,线型(直线、圆孤、非圆曲线等)和相互连结关系等称为2—D图形的输入问题。 2—D图形的输入是计算机图形处理中的一个十分重要的问题,尤其是在2—D冲裁模CAD中更是重要,它直接影响整个CAD系统的使用效率,国内外学者正在努力寻求一个完善的方法。
First, the 2-D graphics input plane graphics, also known as 2-D (2 dimensional) graphics. Given a note full-size 2-D graphics, as shown in Figure 1, how to enter a small amount of data by a certain method, the computer automatically calculate the coordinates of each node, linear (linear, circular solitary, And the interconnected relationship called the 2-D graphics input problem. 2-D graphics input is a very important issue in computer graphics processing, especially in 2-D blanking die CAD is more important, it directly affects the efficiency of the entire CAD system, domestic and foreign scholars are trying to find a Perfect way.