如何表示一根线（python

如何储存一根线？

①记录下函数f(x)=ax+d的各个参数

②检测线线相交时用a1-a2是否等于零判别，然后求x=(b2-b1)/(a1-a2),完事套公式求y

③绘制使用dda

class map:

    class Line(Line_show):

        def __init__(self,P1,P2):
            self.x = P1
            self.y = P2
            self.Ix = (P2[0] - P1[0])
            self.Iy = (P2[1] - P1[1])
            self.k = self.Iy/self.Ix
            self.d = P1[1] - self.k*P1[0]

        def Line_and_Line(self,Line):
            Delta = self.k - Line.k
            if Delta:
                x = (Line.b - self.b)/Delta
                y = self.k*x + self.b
                return {whether:1,P:[x,y]}
            else:
                return {whether:0,P:None}

        def Line_and_spot(self,P):
            return {whether: 1 if self.k*P[0] + self.b ==P[1] else 0}


    class Line_show:

        def main(self,map,Line):


            if Ix:
                if Iy:
                    self.__DDA(map,Line)
                else:
                    y[0] = y[0] - 1
                    for i in range(x[0], y[0] + 1):
                        map.data[x[1]][i] = 1
            else:
                x[0] = x[0] - 1
                for i in range(x[1], y[1] + 1):
                    map.data[i][x[0]] = 1


        def __DDA(map,Line):
            k = Line.k
            b = Line.x[1] - k * Line.x[0]

            Iy = Line.x[1]
            for Ix in range(Line.x[0], Line.y[0]):
                map.data[Ix][int(abs(Iy))] = 1
                Iy = Iy + k