python绘制铅球的运行轨迹代码分享

from mathimport pi, sin, cos, radiansfrom turtleimport Turtledef main():  angle = eval(input('Enter the launch angle(in degrees):'))vel = eval(input('Enter the initial velocity(in meters/sec):'))h0 = eval(input('Enter the initial height(in meters):'))time = eval(input('Enter the time interval:'))# 设置铅球的起始位置xpos = 0ypos = h0theta = radians(angle)# 将输入的角度值转换为弧度值xvel = vel * cos(theta)# 铅球的初始速度在x轴上的分量yvel = vel * sin(theta)# 铅球的初始速度在y轴上的分量# 创建Turtle对象， 刚创建的小乌龟对象， 位于坐标原点（ 0, 0）， 朝向x轴正方向t = Turtle()t.color('red')# 设置画笔的颜色t.pensize(2)# 线条粗细t.speed(2)# 调整速度t.hideturtle()# 隐藏小乌龟# 绘制x轴和y轴t.forward(350)# 绘制x轴t.goto(0, 0)# 回到坐标原点， 准备绘制y轴t.goto(0, 200)# 绘制y轴print('the position:({0:.3f},{1:0.3f})'.format(xpos, ypos))xScale = 25# x坐标放大倍数yScale = 30# y坐标放大倍数# 画笔移到铅球的起始位置， 准备绘制铅球的运行轨迹t.goto(xpos * xScale, ypos * yScale)# 通过while循环绘制铅球的运行轨迹， 每隔time秒， 取一个点， 将所有取到的点连起来while ypos >= 0:  xpos = xpos + time * xvelyvel1 = yvel - time * 9.8ypos = ypos + time * (yvel + yvel1) / 2.0yvel = yvel1print('the position:({0:.3f},{1:0.3f})'.format(xpos, ypos))t.goto(xpos * xScale, ypos * yScale)print('/nDistance traveled:{0:0.1f} meters.'.format(xpos))if __name__ == '__main__':  main()