Заготовка игры танки

bullet.py

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+import arcade
+import math
+
+class Bullet(arcade.Sprite):
+  ls = arcade.SpriteList()
+  def __init__(self,x,y,a,shift=0):
+    super().__init__(
+      './assets/laserBlue01.png',
+      scale=0.7)
+    self.angle = a
+    self.center_x = x + math.sin(self.angle * math.pi / 180) * shift
+    self.center_y = y + math.cos(self.angle * math.pi / 180) * shift
+    self.speed = 10
+    Bullet.ls.append(self)
+
+  @classmethod
+  def update_list(cls):
+    for bullet in cls.ls:
+      bullet.change_x = math.sin(bullet.angle * math.pi / 180) * bullet.speed
+      bullet.change_y = math.cos(bullet.angle * math.pi / 180) * bullet.speed
+      bullet.update()
+
+  @classmethod
+  def draw(cls):
+    cls.ls.draw()
+