Collect Coins Moving Down#
For a complete explanation, see 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
12from __future__ import annotations
13
14import random
15import arcade
16
17# --- Constants ---
18SPRITE_SCALING_PLAYER = 0.5
19SPRITE_SCALING_COIN = 0.2
20COIN_COUNT = 50
21
22SCREEN_WIDTH = 800
23SCREEN_HEIGHT = 600
24SCREEN_TITLE = "Sprite Collect Coins Moving Down Example"
25
26
27class Coin(arcade.Sprite):
28 """
29 This class represents the coins on our screen. It is a child class of
30 the arcade library's "Sprite" class.
31 """
32
33 def reset_pos(self):
34
35 # Reset the coin to a random spot above the screen
36 self.center_y = random.randrange(SCREEN_HEIGHT + 20,
37 SCREEN_HEIGHT + 100)
38 self.center_x = random.randrange(SCREEN_WIDTH)
39
40 def update(self):
41
42 # Move the coin
43 self.center_y -= 1
44
45 # See if the coin has fallen off the bottom of the screen.
46 # If so, reset it.
47 if self.top < 0:
48 self.reset_pos()
49
50
51class MyGame(arcade.Window):
52 """ Our custom Window Class"""
53
54 def __init__(self):
55 """ Initializer """
56
57 # Call the parent class initializer
58 super().__init__(SCREEN_WIDTH, SCREEN_HEIGHT, SCREEN_TITLE)
59
60 # Variables that will hold sprite lists
61 self.player_sprite_list = None
62 self.coin_sprite_list = None
63
64 # Set up the player info
65 self.player_sprite = None
66 self.score = 0
67
68 # Don't show the mouse cursor
69 self.set_mouse_visible(False)
70
71 self.background_color = arcade.color.AMAZON
72
73 def setup(self):
74 """ Set up the game and initialize the variables. """
75
76 # Sprite lists
77 self.player_sprite_list = arcade.SpriteList()
78 self.coin_sprite_list = arcade.SpriteList()
79
80 # Score
81 self.score = 0
82
83 # Set up the player
84 # Character image from kenney.nl
85 self.player_sprite = arcade.Sprite(":resources:images/animated_characters/female_person/femalePerson_idle.png",
86 scale=SPRITE_SCALING_PLAYER)
87 self.player_sprite.center_x = 50
88 self.player_sprite.center_y = 50
89 self.player_sprite_list.append(self.player_sprite)
90
91 # Create the coins
92 for i in range(COIN_COUNT):
93
94 # Create the coin instance
95 # Coin image from kenney.nl
96 coin = Coin(":resources:images/items/coinGold.png", scale=SPRITE_SCALING_COIN)
97
98 # Position the coin
99 coin.center_x = random.randrange(SCREEN_WIDTH)
100 coin.center_y = random.randrange(SCREEN_HEIGHT)
101
102 # Add the coin to the lists
103 self.coin_sprite_list.append(coin)
104
105 def on_draw(self):
106 """ Draw everything """
107 self.clear()
108 self.coin_sprite_list.draw()
109 self.player_sprite_list.draw()
110
111 # Put the text on the screen.
112 output = f"Score: {self.score}"
113 arcade.draw_text(output, 10, 20, arcade.color.WHITE, 14)
114
115 def on_mouse_motion(self, x, y, dx, dy):
116 """ Handle Mouse Motion """
117
118 # Move the center of the player sprite to match the mouse x, y
119 self.player_sprite.center_x = x
120 self.player_sprite.center_y = y
121
122 def on_update(self, delta_time):
123 """ Movement and game logic """
124
125 # Call update on all sprites (The sprites don't do much in this
126 # example though.)
127 self.coin_sprite_list.update()
128
129 # Generate a list of all sprites that collided with the player.
130 hit_list = arcade.check_for_collision_with_list(self.player_sprite,
131 self.coin_sprite_list)
132
133 # Loop through each colliding sprite, remove it, and add to the score.
134 for coin in hit_list:
135 coin.remove_from_sprite_lists()
136 self.score += 1
137
138
139def main():
140 window = MyGame()
141 window.setup()
142 arcade.run()
143
144
145if __name__ == "__main__":
146 main()