some english translations. Modified game to be faster, more competitive

gameRole.py

@@ -1,83 +1,83 @@
-# -*- coding: utf-8 -*-
-"""
-Created on Wed Sep 11 16:36:03 2013
-
-@author: Leo
-"""
-
-import pygame
-
-SCREEN_WIDTH = 480
-SCREEN_HEIGHT = 800
-
-TYPE_SMALL = 1
-TYPE_MIDDLE = 2
-TYPE_BIG = 3
-
-# 子弹类
-class Bullet(pygame.sprite.Sprite):
-    def __init__(self, bullet_img, init_pos):
-        pygame.sprite.Sprite.__init__(self)
-        self.image = bullet_img
-        self.rect = self.image.get_rect()
-        self.rect.midbottom = init_pos
-        self.speed = 10
-
-    def move(self):
-        self.rect.top -= self.speed
-
-# 玩家类
-class Player(pygame.sprite.Sprite):
-    def __init__(self, plane_img, player_rect, init_pos):
-        pygame.sprite.Sprite.__init__(self)
-        self.image = []                                 # 用来存储玩家对象精灵图片的列表
-        for i in range(len(player_rect)):
-            self.image.append(plane_img.subsurface(player_rect[i]).convert_alpha())
-        self.rect = player_rect[0]                      # 初始化图片所在的矩形
-        self.rect.topleft = init_pos                    # 初始化矩形的左上角坐标
-        self.speed = 8                                  # 初始化玩家速度，这里是一个确定的值
-        self.bullets = pygame.sprite.Group()            # 玩家飞机所发射的子弹的集合
-        self.img_index = 0                              # 玩家精灵图片索引
-        self.is_hit = False                             # 玩家是否被击中
-
-    def shoot(self, bullet_img):
-        bullet = Bullet(bullet_img, self.rect.midtop)
-        self.bullets.add(bullet)
-
-    def moveUp(self):
-        if self.rect.top <= 0:
-            self.rect.top = 0
-        else:
-            self.rect.top -= self.speed
-
-    def moveDown(self):
-        if self.rect.top >= SCREEN_HEIGHT - self.rect.height:
-            self.rect.top = SCREEN_HEIGHT - self.rect.height
-        else:
-            self.rect.top += self.speed
-
-    def moveLeft(self):
-        if self.rect.left <= 0:
-            self.rect.left = 0
-        else:
-            self.rect.left -= self.speed
-
-    def moveRight(self):
-        if self.rect.left >= SCREEN_WIDTH - self.rect.width:
-            self.rect.left = SCREEN_WIDTH - self.rect.width
-        else:
-            self.rect.left += self.speed
-
-# 敌人类
-class Enemy(pygame.sprite.Sprite):
-    def __init__(self, enemy_img, enemy_down_imgs, init_pos):
-       pygame.sprite.Sprite.__init__(self)
-       self.image = enemy_img
-       self.rect = self.image.get_rect()
-       self.rect.topleft = init_pos
-       self.down_imgs = enemy_down_imgs
-       self.speed = 2
-       self.down_index = 0
-
-    def move(self):
+# -*- coding: utf-8 -*-
+"""
+Created on Wed Sep 11 16:36:03 2013
+
+@author: Leo
+"""
+
+import pygame
+
+SCREEN_WIDTH = 480
+SCREEN_HEIGHT = 800
+
+TYPE_SMALL = 1
+TYPE_MIDDLE = 2
+TYPE_BIG = 3
+
+# 子弹类
+class Bullet(pygame.sprite.Sprite):
+    def __init__(self, bullet_img, init_pos):
+        pygame.sprite.Sprite.__init__(self)
+        self.image = bullet_img
+        self.rect = self.image.get_rect()
+        self.rect.midbottom = init_pos
+        self.speed = 10
+
+    def move(self):
+        self.rect.top -= self.speed
+
+# 玩家类
+class Player(pygame.sprite.Sprite):
+    def __init__(self, plane_img, player_rect, init_pos):
+        pygame.sprite.Sprite.__init__(self)
+        self.image = []                                 # 用来存储玩家对象精灵图片的列表
+        for i in range(len(player_rect)):
+            self.image.append(plane_img.subsurface(player_rect[i]).convert_alpha())
+        self.rect = player_rect[0]                      # 初始化图片所在的矩形
+        self.rect.topleft = init_pos                    # 初始化矩形的左上角坐标
+        self.speed = 8                                  # 初始化玩家速度，这里是一个确定的值
+        self.bullets = pygame.sprite.Group()            # 玩家飞机所发射的子弹的集合
+        self.img_index = 0                              # 玩家精灵图片索引
+        self.is_hit = False                             # 玩家是否被击中
+
+    def shoot(self, bullet_img):
+        bullet = Bullet(bullet_img, self.rect.midtop)
+        self.bullets.add(bullet)
+
+    def moveUp(self):
+        if self.rect.top <= 0:
+            self.rect.top = 0
+        else:
+            self.rect.top -= self.speed
+
+    def moveDown(self):
+        if self.rect.top >= SCREEN_HEIGHT - self.rect.height:
+            self.rect.top = SCREEN_HEIGHT - self.rect.height
+        else:
+            self.rect.top += self.speed
+
+    def moveLeft(self):
+        if self.rect.left <= 0:
+            self.rect.left = 0
+        else:
+            self.rect.left -= self.speed
+
+    def moveRight(self):
+        if self.rect.left >= SCREEN_WIDTH - self.rect.width:
+            self.rect.left = SCREEN_WIDTH - self.rect.width
+        else:
+            self.rect.left += self.speed
+
+# 敌人类
+class Enemy(pygame.sprite.Sprite):
+    def __init__(self, enemy_img, enemy_down_imgs, init_pos):
+       pygame.sprite.Sprite.__init__(self)
+       self.image = enemy_img
+       self.rect = self.image.get_rect()
+       self.rect.topleft = init_pos
+       self.down_imgs = enemy_down_imgs
+       self.speed = 5
+       self.down_index = 0
+
+    def move(self):
         self.rect.top += self.speed