# Change coins¶

sprite_change_coins.py
  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 """ Sprite Change Coins This shows how you can change a sprite once it is hit, rather than eliminate it. 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_change_coins """ import random import arcade import os SPRITE_SCALING = 1 SCREEN_WIDTH = 800 SCREEN_HEIGHT = 600 class Collectable(arcade.Sprite): """ This class represents something the player collects. """ def __init__(self, filename, scale): super().__init__(filename, scale) # Flip this once the coin has been collected. self.changed = False class MyGame(arcade.Window): """ Main application class.a """ def __init__(self, width, height): super().__init__(width, height) # 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) # Sprite lists self.all_sprites_list = None self.coin_list = None # Set up the player self.score = 0 self.player_sprite = None def setup(self): """ Set up the game and initialize the variables. """ # Sprite lists self.all_sprites_list = arcade.SpriteList() self.coin_list = arcade.SpriteList() # Set up the player self.score = 0 self.player_sprite = arcade.Sprite("images/character.png", 0.5) self.player_sprite.center_x = 50 self.player_sprite.center_y = 50 self.all_sprites_list.append(self.player_sprite) for i in range(50): # Create the coin instance coin = Collectable("images/coin_01.png", SPRITE_SCALING) coin.width = 30 coin.height = 30 # Position the coin coin.center_x = random.randrange(SCREEN_WIDTH) coin.center_y = random.randrange(SCREEN_HEIGHT) # Add the coin to the lists self.all_sprites_list.append(coin) self.coin_list.append(coin) # Don't show the mouse cursor self.set_mouse_visible(False) # Set the background color arcade.set_background_color(arcade.color.AMAZON) def on_draw(self): """ Render the screen. """ # This command has to happen before we start drawing arcade.start_render() # Draw all the sprites. self.all_sprites_list.draw() # Put the text on the screen. output = "Score: {}".format(self.score) arcade.draw_text(output, 10, 20, arcade.color.WHITE, 14) def on_mouse_motion(self, x, y, dx, dy): """ Called whenever the mouse moves. """ 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, change it, and add to the score. for coin in hit_list: # Have we collected this? if not coin.changed: # No? Then do so coin.texture = arcade.load_texture("images/bumper.png") coin.changed = True coin.width = 30 coin.height = 30 self.score += 1 def main(): """ Main method """ window = MyGame(SCREEN_WIDTH, SCREEN_HEIGHT) window.setup() arcade.run() if __name__ == "__main__": main()