pygame发射子弹后绘制射线

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import pygame
import sys
import mathpygame.init()screen = pygame.display.set_mode((800, 600))
pygame.display.set_caption("Rotate and Shoot Bullets")# 定义子弹类
class Bullet:def __init__(self, x, y, angle):self.x = xself.y = yself.angle = angleself.speed = 5def update(self):rad_angle = math.radians(self.angle)self.x =self.x+  math.cos(rad_angle)*5self.y = self.y-  math.sin(rad_angle)*5def draw(self):p=pygame.draw.rect(screen, (255, 0, 0), (int(self.x), int(self.y),6,6))if (p.collidelistall(qsz)):  # 碰撞检测xiansz.clear()  # 先清空数组，前面有初始化# self.endx, self.endy = self.x, self.yxiansz.append((self.x, self.y))  # 使用对象外的数组，要是对象自己的变量，在碰撞后会覆盖碰撞位置的x，yq = [[1, 1, 1, 1, 1, 1, 1, 1],[1, 0, 0, 0, 0, 0, 0, 1],[1, 0, 0, 0, 0, 0, 0, 1],[1, 0, 0, 0, 0, 0, 0, 1],[1, 0, 0, 0, 0, 0, 0, 1],[1, 0, 0, 0, 0, 0, 0, 1],[1, 0, 0, 0, 0, 0, 0, 1],[1, 1, 1, 1, 1, 1, 1, 1]]
qsz=[]
bullets = []  # 子弹列表
player_x, player_y = 400, 300  # 玩家位置初始值
player_angle = 0  # 玩家初始角度
c=pygame.time.Clock()
xiansz=[(0,0)]
while True:for event in pygame.event.get():if event.type == pygame.QUIT:pygame.quit()sys.exit()keys = pygame.key.get_pressed()if keys[pygame.K_LEFT]:player_angle += 1  # 左箭头键逆时针旋转elif keys[pygame.K_RIGHT]:player_angle -= 1  # 右箭头键顺时针旋转elif keys[pygame.K_SPACE]:bullets.append(Bullet(player_x, player_y, player_angle))  # 空格键发射子弹screen.fill((255, 255, 255))  # 清空屏幕c.tick(70)for h in range(len(q)):#画墙#print(q[h],"行",h)for g in range(len(q[h])):if q[h][g]==1:#print(q[h][g],"个",g,h)pz=pygame.draw.rect(screen, (140, 240, 40), (100+h*60, 100+g*60, 60, 60))qsz.append(pz)for bullet in bullets:bullet.update()bullet.draw()for i in (bullets):#画射线pygame.draw.line(screen, (40, 140, 40), (player_x, player_y), (xiansz[0]))p=pygame.math.Vector2(player_x,player_y)#角色位置p1=pygame.math.Vector2(xiansz[0])#碰撞点x，yjuli=p.distance_to(p1)#计算距离，其实有距离后不用再画射线，后面画墙，画射线是为了理解pygame.display.flip()