更新 'bullet - .py'

Bullet - 副本.py

@@ -1,49 +0,0 @@
-
-
-import pygame
-from pygame.sprite import Sprite
-
-
-def self(args):
- pass
-
-
-def self(args):
- pass
-
-
-def self(args):
- pass
-
-
-def Bullet(args):
- pass
-
-
-class Bullet(Sprite):
- '''飞船子弹进行管理'''
-
- def __init__(self,ai_settings,screen,ship):
- super(Bullet,self).__init__()
- self.screen = screen
-
- # 创建子弹矩形初始位置（0,0,3,15）分别对应lef，top，宽，高
- self.rect = pygame.Rect(0,0,
- ai_settings.bullet_width, ai_settings.bullet_height)
-
- self.rect.centerx = ship.rect.centerx # 设置中心点x轴坐标跟飞船一致
- self.rect.top = ship.rect.top  # 设置y轴坐标顶部跟飞船一致
-
- # 设置成小数进行计算
- self.top = float(self.rect.top)
-
- self.color = ai_settings.bullet_color
- self.speed_factor = ai_settings.bullet_speed_factor
-
- def update(self):
- self.top -=self.speed_factor
- self.rect.top = self.top
- print(self.rect.top)
-
- def draw_bullet(self):
- pygame.draw.rect(self.screen,self.color,self.rect)

bullet - .py

@@ -0,0 +1,30 @@
+import pygame
+from pygame.sprite import Sprite
+
+class Bullet(Sprite):
+   #管理飞船所发射子弹的类
+
+    def __init__(self, ai_game):
+        #在飞船当前位置创建一个子弹对象
+        super().__init__()
+        self.screen = ai_game.screen
+        self.settings = ai_game.settings
+        self.color = self.settings.bullet_color
+
+        # 在（0，0）处创建一个表示子弹的矩形，再设置正确的位置
+        self.rect = pygame.Rect(0, 0, self.settings.bullet_width,
+                                self.settings.bullet_height)
+        self.rect.midtop = ai_game.ship.rect.midtop
+
+        # 储存用小数表示的子弹位置
+        self.y = float(self.rect.y)
+
+    def update(self):
+        # 更新表示子弹位置的小数值
+        self.y -= self.settings.bullet_speed
+        #更新表示子弹的rect位置
+        self.rect.y = self.y
+
+    def draw_bullet(self):
+        #在屏幕上绘制子弹
+        pygame.draw.rect(self.screen, self.color, self.rect)