Graphics.py圆在相互反弹时出现故障

Question

我已经完成了一个代码的创建，该代码可以使圆圈从彼此和它们所在的墙壁上反弹。我使用了graphics.py，并致力于使代码更短、更优雅。它工作得很好，但当它们相互反弹时，经常会出现故障。这不是我的较长代码的问题。是什么原因造成的？谢谢：(

from graphics import*
from random import*
from time import*
from math import sqrt
win = GraphWin('My Program', 600, 600)
win.setBackground('springgreen3')
holidays = Text(Point(300, 100), 'Happy Holidays!!!')
holidays.setStyle('bold italic')
holidays.draw(win)
class mycircle:
circle = ''
vel_x = 0
vel_y = 0
circle_fill = ''
circle_outline = ''
def __init__(self, circle, vel_x, vel_y, circle_fill, circle_outline):
self.circle = circle
self.vel_x = vel_x
self.vel_y = vel_y
self.circle.setFill(circle_fill)
self.circle.setOutline(circle_outline)
self.circle.draw(win)
circle1 = mycircle(Circle(Point(100,100),30), randint(-8,8), randint(-8,-8), 'tan2', 'red')
circle2 = mycircle(Circle(Point(300,200),30), randint(-8,8), randint(-8,-8), 'tan2', 'red')
circle3 = mycircle(Circle(Point(400,300),30), randint(-8,8), randint(-8,-8), 'tan2', 'red')
circle4 = mycircle(Circle(Point(500,400),30), randint(-8,8), randint(-8,-8), 'red2', 'red')
circle5 = mycircle(Circle(Point(300,500),30), randint(-8,8), randint(-8,-8), 'red2', 'red')
circle6 = mycircle(Circle(Point(150,250),30), randint(-8,8), randint(-8,-8), 'red2', 'red')
circle7 = mycircle(Circle(Point(25,250),30), randint(-8,8), randint(-8,-8), 'green', 'red')
circle8 = mycircle(Circle(Point(350,35),30), randint(-8,8), randint(-8,-8), 'green', 'red')
circle9 = mycircle(Circle(Point(45,450),30), randint(-8,8), randint(-8,-8), 'green', 'red')
allcircles = [circle1, circle2, circle3, circle4, circle5, circle6, circle7, circle8, circle9]
key = win.checkKey()
while key == '':
for c in allcircles:
c.circle.move(c.vel_x, c.vel_y)
sleep(0.000000001)
find_center = c.circle.getCenter()
center_x = find_center.getX()
center_y = find_center.getY()
if ((center_x - 30) <= 0) or ((center_x + 30) >= 600):
c.vel_x = -c.vel_x
if ((center_y - 30) <= 0) or ((center_y + 30) >= 600):
c.vel_y = -c.vel_y
def circleDistance(cir1, cir2):
center1 = cir1.getCenter()
center2 = cir2.getCenter()
x1 = center1.getX()
y1 = center1.getY()
x2 = center2.getX()
y2 = center2.getY()
dist = sqrt((x2-x1) * (x2-x1) + (y2-y1) * (y2-y1))
return dist
newlist = allcircles.copy()
newlist.remove(c)
for d in newlist:
if circleDistance(d.circle, c.circle) <= 60:
d.vel_x = -d.vel_x
d.vel_y = -d.vel_y
key = win.checkKey()

Answer 1

由于检测到碰撞，它会反弹两次，然后速度会发生变化。然而，在它离开碰撞范围之前，它会检测到另一次碰撞(距离仍小于60(，并再次改变速度。