從第壹個點到兩個或三個點的直線應作為垂直線。
Dim x(3)為Double,y(3)為Double
將k調成雙精度
x(1) = 3: y(1) = 2
x(2) = 1: y(2) = 1
x(3) = 2: y(3) = 0
如果x(2) = x(3)或y(2) = y(3),則
如果y(2) = y(3 ),那麽
y(0) = y(2)
x(0) = x(1)
其他
x(0) = x(2)
y(0) = y(1)
如果…就會結束
其他
k = (y(3) - y(2)) / (x(3) - x(2))
x(0)=(y(1)-y(2)+k * x(2)+x(1)/k)/(k+1/k)
y(0)= y(1)-(x(0)-x(1))/k
如果…就會結束
調試。打印x(0),y(0)
末端接頭