16*16点阵式电路图，电路简洁明确，可以随意设计字型。-16* 16 dot matrix circuit, the circuit simple and clear, free to design fonts.

获取CAD图形中圆的坐标，构成点矩阵，并提取计算其距离矩阵-CAD drawing circles to obtain the coordinates of a dot matrix form, and extracted calculate the distance matrix