收集向下移动的硬币#
有关完整的说明，请参阅 Chapter 22 of Arcade Academy - Learn Python 。
sprite_collect_coins_move_down.py#
1"""
2Sprite Collect Coins Moving Down
3
4Simple program to show basic sprite usage.
5
6Artwork from https://kenney.nl
7
8If Python and Arcade are installed, this example can be run from the command line with:
9python -m arcade.examples.sprite_collect_coins_move_down
10"""
11
12import random
13import arcade
14
15# --- Constants ---
16SPRITE_SCALING_PLAYER = 0.5
17SPRITE_SCALING_COIN = 0.2
18COIN_COUNT = 50
19
20SCREEN_WIDTH = 800
21SCREEN_HEIGHT = 600
22SCREEN_TITLE = "Sprite Collect Coins Moving Down Example"
23
24
25class Coin(arcade.Sprite):
26 """
27 This class represents the coins on our screen. It is a child class of
28 the arcade library's "Sprite" class.
29 """
30
31 def reset_pos(self):
32
33 # Reset the coin to a random spot above the screen
34 self.center_y = random.randrange(SCREEN_HEIGHT + 20,
35 SCREEN_HEIGHT + 100)
36 self.center_x = random.randrange(SCREEN_WIDTH)
37
38 def update(self):
39
40 # Move the coin
41 self.center_y -= 1
42
43 # See if the coin has fallen off the bottom of the screen.
44 # If so, reset it.
45 if self.top < 0:
46 self.reset_pos()
47
48
49class MyGame(arcade.Window):
50 """ Our custom Window Class"""
51
52 def __init__(self):
53 """ Initializer """
54
55 # Call the parent class initializer
56 super().__init__(SCREEN_WIDTH, SCREEN_HEIGHT, SCREEN_TITLE)
57
58 # Variables that will hold sprite lists
59 self.player_sprite_list = None
60 self.coin_sprite_list = None
61
62 # Set up the player info
63 self.player_sprite = None
64 self.score = 0
65
66 # Don't show the mouse cursor
67 self.set_mouse_visible(False)
68
69 self.background_color = arcade.color.AMAZON
70
71 def setup(self):
72 """ Set up the game and initialize the variables. """
73
74 # Sprite lists
75 self.player_sprite_list = arcade.SpriteList()
76 self.coin_sprite_list = arcade.SpriteList()
77
78 # Score
79 self.score = 0
80
81 # Set up the player
82 # Character image from kenney.nl
83 self.player_sprite = arcade.Sprite(":resources:images/animated_characters/female_person/femalePerson_idle.png",
84 scale=SPRITE_SCALING_PLAYER)
85 self.player_sprite.center_x = 50
86 self.player_sprite.center_y = 50
87 self.player_sprite_list.append(self.player_sprite)
88
89 # Create the coins
90 for i in range(COIN_COUNT):
91
92 # Create the coin instance
93 # Coin image from kenney.nl
94 coin = Coin(":resources:images/items/coinGold.png", scale=SPRITE_SCALING_COIN)
95
96 # Position the coin
97 coin.center_x = random.randrange(SCREEN_WIDTH)
98 coin.center_y = random.randrange(SCREEN_HEIGHT)
99
100 # Add the coin to the lists
101 self.coin_sprite_list.append(coin)
102
103 def on_draw(self):
104 """ Draw everything """
105 self.clear()
106 self.coin_sprite_list.draw()
107 self.player_sprite_list.draw()
108
109 # Put the text on the screen.
110 output = f"Score: {self.score}"
111 arcade.draw_text(output, 10, 20, arcade.color.WHITE, 14)
112
113 def on_mouse_motion(self, x, y, dx, dy):
114 """ Handle Mouse Motion """
115
116 # Move the center of the player sprite to match the mouse x, y
117 self.player_sprite.center_x = x
118 self.player_sprite.center_y = y
119
120 def on_update(self, delta_time):
121 """ Movement and game logic """
122
123 # Call update on all sprites (The sprites don't do much in this
124 # example though.)
125 self.coin_sprite_list.update()
126
127 # Generate a list of all sprites that collided with the player.
128 hit_list = arcade.check_for_collision_with_list(self.player_sprite,
129 self.coin_sprite_list)
130
131 # Loop through each colliding sprite, remove it, and add to the score.
132 for coin in hit_list:
133 coin.remove_from_sprite_lists()
134 self.score += 1
135
136
137def main():
138 window = MyGame()
139 window.setup()
140 arcade.run()
141
142
143if __name__ == "__main__":
144 main()