Python 线对线与pygame'相交；s倒y轴

        x1 = other.pos1[0]
        y1 = other.pos1[1]
        x2 = other.pos2[0]
        y2 = other.pos2[1]

        x3 = self.pos1[0]
        y3 = self.pos1[1]
        x4 = self.pos2[0]
        y4 = self.pos2[1]

        den = (x1 - x2) * (y3 - y4) - (y1 * y2 * (x3 - x4))

        if den == 0:
            return

        t = ((x1 - x3) * (y3 - y4) - (y1 - y3) * (x3 - x4)) / den

        u = -(((x1 - x2) * (y1 - y3) - (y1 - y2) * (x1 - x3))) / den

        if t > 0 and t < 1 and u > 0:
            point = (x3 + u * (x4 - x3), y3 + u * (y4 - y3))

            pygame.gfxdraw.filled_circle(surface, point[0], point[1], 3, (255, 0, 0))

            return point

        else:
            return

        x1 = other.pos1[0]
        y1 = other.pos1[1]
        x2 = other.pos2[0]
        y2 = other.pos2[1]

        x3 = self.pos1[0]
        y3 = self.pos1[1]
        x4 = self.pos2[0]
        y4 = self.pos2[1]

        den = (x1 - x2) * (y3 - y4) - (y1 * y2 * (x3 - x4))

        if den == 0:
            return

        t = ((x1 - x3) * (y3 - y4) - (y1 - y3) * (x3 - x4)) / den

        u = -(((x1 - x2) * (y1 - y3) - (y1 - y2) * (x1 - x3))) / den

        if t > 0 and t < 1 and u > 0:
            point = (x3 + u * (x4 - x3), y3 + u * (y4 - y3))

            pygame.gfxdraw.filled_circle(surface, point[0], point[1], 3, (255, 0, 0))

            return point

        else:
            return

我曾尝试在我的代码中实现此方法，但没有成功，我确实认为问题在于pygame中的y轴反转，还是有其他东西隐藏在我的视线之下？有什么建议吗

        x1 = other.pos1[0]
        y1 = other.pos1[1]
        x2 = other.pos2[0]
        y2 = other.pos2[1]

        x3 = self.pos1[0]
        y3 = self.pos1[1]
        x4 = self.pos2[0]
        y4 = self.pos2[1]

        den = (x1 - x2) * (y3 - y4) - (y1 * y2 * (x3 - x4))

        if den == 0:
            return

        t = ((x1 - x3) * (y3 - y4) - (y1 - y3) * (x3 - x4)) / den

        u = -(((x1 - x2) * (y1 - y3) - (y1 - y2) * (x1 - x3))) / den

        if t > 0 and t < 1 and u > 0:
            point = (x3 + u * (x4 - x3), y3 + u * (y4 - y3))

            pygame.gfxdraw.filled_circle(surface, point[0], point[1], 3, (255, 0, 0))

            return point

        else:
            return

这是我的密码：

        x1 = other.pos1[0]
        y1 = other.pos1[1]
        x2 = other.pos2[0]
        y2 = other.pos2[1]

        x3 = self.pos1[0]
        y3 = self.pos1[1]
        x4 = self.pos2[0]
        y4 = self.pos2[1]

        den = (x1 - x2) * (y3 - y4) - (y1 * y2 * (x3 - x4))

        if den == 0:
            return

        t = ((x1 - x3) * (y3 - y4) - (y1 - y3) * (x3 - x4)) / den

        u = -(((x1 - x2) * (y1 - y3) - (y1 - y2) * (x1 - x3))) / den

        if t > 0 and t < 1 and u > 0:
            point = (x3 + u * (x4 - x3), y3 + u * (y4 - y3))

            pygame.gfxdraw.filled_circle(surface, point[0], point[1], 3, (255, 0, 0))

            return point

        else:
            return

x1=other.pos1[0]
y1=其他位置1[1]
x2=其他.pos2[0]
y2=其他。位置2[1]
x3=self.pos1[0]
y3=self.pos1[1]
x4=self.pos2[0]
y4=self.pos2[1]
den=（x1-x2）*（y3-y4）-（y1*y2*（x3-x4））
如果den==0：
返回
t=（（x1-x3）*（y3-y4）-（y1-y3）*（x3-x4））/den
u=-（（x1-x2）*（y1-y3）-（y1-y2）*（x1-x3））/den
如果t>0且t<1且u>0：
点=（x3+u*（x4-x3），y3+u*（y4-y3））
pygame.gfxdraw.filled_圆（曲面，点[0]，点[1]，3，（255，0，0））
返回点
其他：
返回

的分母由以下公式计算：

        x1 = other.pos1[0]
        y1 = other.pos1[1]
        x2 = other.pos2[0]
        y2 = other.pos2[1]

        x3 = self.pos1[0]
        y3 = self.pos1[1]
        x4 = self.pos2[0]
        y4 = self.pos2[1]

        den = (x1 - x2) * (y3 - y4) - (y1 * y2 * (x3 - x4))

        if den == 0:
            return

        t = ((x1 - x3) * (y3 - y4) - (y1 - y3) * (x3 - x4)) / den

        u = -(((x1 - x2) * (y1 - y3) - (y1 - y2) * (x1 - x3))) / den

        if t > 0 and t < 1 and u > 0:
            point = (x3 + u * (x4 - x3), y3 + u * (y4 - y3))

            pygame.gfxdraw.filled_circle(surface, point[0], point[1], 3, (255, 0, 0))

            return point

        else:
            return

所以下面的表达是错误的：

        x1 = other.pos1[0]
        y1 = other.pos1[1]
        x2 = other.pos2[0]
        y2 = other.pos2[1]

        x3 = self.pos1[0]
        y3 = self.pos1[1]
        x4 = self.pos2[0]
        y4 = self.pos2[1]

        den = (x1 - x2) * (y3 - y4) - (y1 * y2 * (x3 - x4))

        if den == 0:
            return

        t = ((x1 - x3) * (y3 - y4) - (y1 - y3) * (x3 - x4)) / den

        u = -(((x1 - x2) * (y1 - y3) - (y1 - y2) * (x1 - x3))) / den

        if t > 0 and t < 1 and u > 0:
            point = (x3 + u * (x4 - x3), y3 + u * (y4 - y3))

            pygame.gfxdraw.filled_circle(surface, point[0], point[1], 3, (255, 0, 0))

            return point

        else:
            return

它必须是：

        x1 = other.pos1[0]
        y1 = other.pos1[1]
        x2 = other.pos2[0]
        y2 = other.pos2[1]

        x3 = self.pos1[0]
        y3 = self.pos1[1]
        x4 = self.pos2[0]
        y4 = self.pos2[1]

        den = (x1 - x2) * (y3 - y4) - (y1 * y2 * (x3 - x4))

        if den == 0:
            return

        t = ((x1 - x3) * (y3 - y4) - (y1 - y3) * (x3 - x4)) / den

        u = -(((x1 - x2) * (y1 - y3) - (y1 - y2) * (x1 - x3))) / den

        if t > 0 and t < 1 and u > 0:
            point = (x3 + u * (x4 - x3), y3 + u * (y4 - y3))

            pygame.gfxdraw.filled_circle(surface, point[0], point[1], 3, (255, 0, 0))

            return point

        else:
            return

den=（x1-x2）*（y3-y4）-（y1-y2）*（x3-x4））

（x1-x2）*（y3-y4）-（y1*y2*（x3-x4））

必须是

（x1-x2）*（y3-y4）-（y1-y2）*（x3-x4））

哦，我的天啊，非常感谢你，我现在感觉很傻。像这样的错误发生在我们所有人身上。