# Collect Coins that are Bouncing¶

For an explanation on how this code works, see:

  1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 101 102 103 104 105 106 107 108 109 110 111 112 113 114 115 116 117 118 119 120 121 122 123 124 125 126 127 128 129 130 131 132 133 134 135 136 137 138 139 140 141 142 143 144 145 146 147 148 149 150 151 152 153 154 155 156 """ Sprite Collect Coins Simple program to show basic sprite usage. Artwork from http://kenney.nl If Python and Arcade are installed, this example can be run from the command line with: python -m arcade.examples.sprite_collect_coins_move_bouncing """ import random import arcade import os # --- Constants --- SPRITE_SCALING_PLAYER = 0.5 SPRITE_SCALING_COIN = 0.2 COIN_COUNT = 50 SCREEN_WIDTH = 800 SCREEN_HEIGHT = 600 class Coin(arcade.Sprite): def __init__(self, filename, sprite_scaling): super().__init__(filename, sprite_scaling) self.change_x = 0 self.change_y = 0 def update(self): # Move the coin self.center_x += self.change_x self.center_y += self.change_y # If we are out-of-bounds, then 'bounce' if self.left < 0: self.change_x *= -1 if self.right > SCREEN_WIDTH: self.change_x *= -1 if self.bottom < 0: self.change_y *= -1 if self.top > SCREEN_HEIGHT: self.change_y *= -1 class MyGame(arcade.Window): """ Our custom Window Class""" def __init__(self): """ Initializer """ # Call the parent class initializer super().__init__(SCREEN_WIDTH, SCREEN_HEIGHT, "Sprite Example") # Set the working directory (where we expect to find files) to the same # directory this .py file is in. You can leave this out of your own # code, but it is needed to easily run the examples using "python -m" # as mentioned at the top of this program. file_path = os.path.dirname(os.path.abspath(__file__)) os.chdir(file_path) # Variables that will hold sprite lists self.all_sprites_list = None self.coin_list = None # Set up the player info self.player_sprite = None self.score = 0 # Don't show the mouse cursor self.set_mouse_visible(False) arcade.set_background_color(arcade.color.AMAZON) def setup(self): """ Set up the game and initialize the variables. """ # Sprite lists self.all_sprites_list = arcade.SpriteList() self.coin_list = arcade.SpriteList() # Score self.score = 0 # Set up the player # Character image from kenney.nl self.player_sprite = arcade.Sprite("images/character.png", SPRITE_SCALING_PLAYER) self.player_sprite.center_x = 50 self.player_sprite.center_y = 50 self.all_sprites_list.append(self.player_sprite) # Create the coins for i in range(50): # Create the coin instance # Coin image from kenney.nl coin = Coin("images/coin_01.png", SPRITE_SCALING_COIN) # Position the coin coin.center_x = random.randrange(SCREEN_WIDTH) coin.center_y = random.randrange(SCREEN_HEIGHT) coin.change_x = random.randrange(-3, 4) coin.change_y = random.randrange(-3, 4) # Add the coin to the lists self.all_sprites_list.append(coin) self.coin_list.append(coin) def on_draw(self): """ Draw everything """ arcade.start_render() self.all_sprites_list.draw() # Put the text on the screen. output = f"Score: {self.score}" arcade.draw_text(output, 10, 20, arcade.color.WHITE, 14) def on_mouse_motion(self, x, y, dx, dy): """ Handle Mouse Motion """ # Move the center of the player sprite to match the mouse x, y self.player_sprite.center_x = x self.player_sprite.center_y = y def update(self, delta_time): """ Movement and game logic """ # Call update on all sprites (The sprites don't do much in this # example though.) self.all_sprites_list.update() # Generate a list of all sprites that collided with the player. hit_list = arcade.check_for_collision_with_list(self.player_sprite, self.coin_list) # Loop through each colliding sprite, remove it, and add to the score. for coin in hit_list: coin.kill() self.score += 1 def main(): window = MyGame() window.setup() arcade.run() if __name__ == "__main__": main()