Python自上而下的射手碰撞检测冻结问题

Question

我正在尝试用python编写自顶向下的射击游戏。它会运行，正确显示地图，并且播放器的移动恰到好处。我遇到的问题是碰撞检测。它可以检测到碰撞，但是之后会冻结。有任何想法吗？该代码将运行，并且可以正常工作，直到碰到墙（矩形）为止。然后就冻结！！！我不确定这是怎么回事，但我希望这不是太大的问题！这是我的代码：

import pygame
pygame.init()

screenWidth = 1118
screenHeight = 573
win = pygame.display.set_mode((screenWidth, screenHeight))

pygame.display.set_caption("First Game")

class Rectangle(object):
    """__init__() functions as the class constructor"""
    def __init__(self, color=(None, None, None), width=None, height=None, x=None, y=None):
        self.color = color
        self.width = width
        self.height = height
        self.x = x
        self.y = y
class Circle(object):
    """__init__() functions as the class constructor"""
    def __init__(self, color=(None, None, None), radius=None, x=None, y=None):
        self.color = color
        self.radius = radius
        self.x = x
        self.y = y
def detectCollisions(x1,y1,w1,h1,x2,y2,w2,h2):

    if (x2+w2>=x1>=x2 and y2+h2>=y1>=y2):

        return True

    elif (x2+w2>=x1+w1>=x2 and y2+h2>=y1>=y2):

        return True

    elif (x2+w2>=x1>=x2 and y2+h2>=y1+h1>=y2):

        return True

    elif (x2+w2>=x1+w1>=x2 and y2+h2>=y1+h1>=y2):

        return True

    else:

        return False

charwidth = 40
x = 10
charheight = 40
y = 10
vel = 1
armlength = 25
armwidth = 10

run = True
while run:
    rectangleList = []
    circleList = []
    rectangleList.append(Rectangle((0,255,0), 122, 35, 69, 0))
    rectangleList.append(Rectangle((0,255,0), 156, 35, 69, 174))
    rectangleList.append(Rectangle((0,255,0), 139, 35, 69, 382))
    rectangleList.append(Rectangle((0,255,0), 78, 52, 225, 443))
    rectangleList.append(Rectangle((0,255,0), 78, 52, 381, 417))
    rectangleList.append(Rectangle((0,255,0), 130, 52, 511, 443))
    rectangleList.append(Rectangle((0,255,0), 104, 468, 251, 261))
    rectangleList.append(Rectangle((0,255,0), 372, 104, 849, 96))
    circleList.append(Circle((0,255,0), 39, 277, 170))
    circleList.append(Circle((0,255,0), 39, 420, 120))
    circleList.append(Circle((0,255,0), 39, 563, 170))
    rectangleList.append(Rectangle((0,255,0), 10, 500, 230, 52))
    armX = (charwidth/2)+x
    armY = (charheight/2)+y
    pygame.time.delay(10)

    for event in pygame.event.get():
        if event.type == pygame.QUIT:
            run = False

    keys = pygame.key.get_pressed()
    if keys[pygame.K_LEFT]:
        collleft = False
        for rectangle in rectangleList:
            if detectCollisions(x,y,charheight,charwidth,rectangle.x,rectangle.y,rectangle.height,rectangle.width):
                collleft = True
        if collleft == False:
            if x - vel > 0:
                x -= vel
                print("Move LEFT")
        collleft = False
    if keys[pygame.K_RIGHT]:
        collright = False
        for rectangle in rectangleList:
            if detectCollisions(x,y,charheight,charwidth,rectangle.x,rectangle.y,rectangle.height,rectangle.width):
                collright = True
        if collright == False:
            if x+vel < screenWidth-charwidth:
                x += vel
                print("Move RIGHT")

    if keys[pygame.K_UP]:
        collup = False
        for rectangle in rectangleList:
            if detectCollisions(x,y,charheight,charwidth,rectangle.x,rectangle.y,rectangle.height,rectangle.width):
                collup = True
        if collup == False:
            if y-vel > 0:
                y -= vel
                print("Move UP")

    if keys[pygame.K_DOWN]:
        colldown = False
        for rectangle in rectangleList:
            if detectCollisions(x,y,charheight,charwidth,rectangle.x,rectangle.y,rectangle.height,rectangle.width):
                colldown = True
        if colldown == False:
            if y+vel < screenHeight-charheight:
                y += vel
                print("Move DOWN")
    win.fill((0, 0, 0))
    for rectangle in rectangleList:
        pygame.draw.rect(win, rectangle.color, (rectangle.x, rectangle.y, rectangle.height, rectangle.width))
    for circle in circleList:
        pygame.draw.circle(win, circle.color, [circle.x, circle.y], circle.radius)
    pygame.draw.rect(win, (255, 0, 0), (x, y, charwidth, charheight))
    pygame.draw.rect(win, (0, 0, 255), (armX, armY, armlength, armwidth))
    pygame.display.update()
pygame.quit()