用中点Bresenham算法画圆心为(0,0) ,半径R= 12的八分之一圆弧

以下是使用中点Bresenham算法画圆心为(0,0) ,半径R= 12的八分之一圆弧的代码：

def draw_circle_arc(xc, yc, r, start_angle, end_angle):
    x = 0
    y = r
    d = 3 - 2 * r
    while x <= y:
        if start_angle <= 45 and end_angle >= 0:
            plot(xc + x, yc + y)
        if start_angle <= 90 and end_angle >= 45:
            plot(xc + y, yc + x)
        if start_angle <= 135 and end_angle >= 90:
            plot(xc + y, yc - x)
        if start_angle <= 180 and end_angle >= 135:
            plot(xc + x, yc - y)
        if start_angle <= 225 and end_angle >= 180:
            plot(xc - x, yc - y)
        if start_angle <= 270 and end_angle >= 225:
            plot(xc - y, yc - x)
        if start_angle <= 315 and end_angle >= 270:
            plot(xc - y, yc + x)
        if start_angle <= 360 and end_angle >= 315:
            plot(xc - x, yc + y)
        if d < 0:
            d = d + 4 * x + 6
        else:
            d = d + 4 * (x - y) + 10
            y = y - 1
        x = x + 1

其中，xc和yc表示圆心的坐标，r表示半径，start_angle和end_angle表示圆弧的起始角度和结束角度，plot(x, y)表示在坐标(x, y)处绘制一个点。