Collect Coins that are Moving in a Circle#

Screenshot of using sprites to collect coins
sprite_collect_coins_move_circle.py#
  1"""
  2Sprite Collect Coins Moving in Circles
  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_circle
 10"""
 11
 12import random
 13import arcade
 14import math
 15
 16SPRITE_SCALING = 0.5
 17
 18SCREEN_WIDTH = 800
 19SCREEN_HEIGHT = 600
 20SCREEN_TITLE = "Sprite Collect Coins Moving in Circles Example"
 21
 22
 23class Coin(arcade.Sprite):
 24
 25    def __init__(self, filename, sprite_scaling):
 26        """ Constructor. """
 27        # Call the parent class (Sprite) constructor
 28        super().__init__(filename, sprite_scaling)
 29
 30        # Current angle in radians
 31        self.circle_angle = 0
 32
 33        # How far away from the center to orbit, in pixels
 34        self.circle_radius = 0
 35
 36        # How fast to orbit, in radians per frame
 37        self.circle_speed = 0.008
 38
 39        # Set the center of the point we will orbit around
 40        self.circle_center_x = 0
 41        self.circle_center_y = 0
 42
 43    def update(self):
 44
 45        """ Update the ball's position. """
 46        # Calculate a new x, y
 47        self.center_x = self.circle_radius * math.sin(self.circle_angle) \
 48            + self.circle_center_x
 49        self.center_y = self.circle_radius * math.cos(self.circle_angle) \
 50            + self.circle_center_y
 51
 52        # Increase the angle in prep for the next round.
 53        self.circle_angle += self.circle_speed
 54
 55
 56class MyGame(arcade.Window):
 57    """ Main application class. """
 58
 59    def __init__(self, width, height, title):
 60
 61        super().__init__(width, height, title)
 62
 63        # Sprite lists
 64        self.all_sprites_list = None
 65        self.coin_list = None
 66
 67        # Set up the player
 68        self.score = 0
 69        self.player_sprite = None
 70
 71    def start_new_game(self):
 72        """ Set up the game and initialize the variables. """
 73
 74        # Sprite lists
 75        self.all_sprites_list = arcade.SpriteList()
 76        self.coin_list = arcade.SpriteList()
 77
 78        # Set up the player
 79        self.score = 0
 80        # Character image from kenney.nl
 81        self.player_sprite = arcade.Sprite(":resources:images/animated_characters/female_person/femalePerson_idle.png",
 82                                           SPRITE_SCALING)
 83        self.player_sprite.center_x = 50
 84        self.player_sprite.center_y = 70
 85        self.all_sprites_list.append(self.player_sprite)
 86
 87        for i in range(50):
 88
 89            # Create the coin instance
 90            # Coin image from kenney.nl
 91            coin = Coin(":resources:images/items/coinGold.png", SPRITE_SCALING / 3)
 92
 93            # Position the center of the circle the coin will orbit
 94            coin.circle_center_x = random.randrange(SCREEN_WIDTH)
 95            coin.circle_center_y = random.randrange(SCREEN_HEIGHT)
 96
 97            # Random radius from 10 to 200
 98            coin.circle_radius = random.randrange(10, 200)
 99
100            # Random start angle from 0 to 2pi
101            coin.circle_angle = random.random() * 2 * math.pi
102
103            # Add the coin to the lists
104            self.all_sprites_list.append(coin)
105            self.coin_list.append(coin)
106
107        # Don't show the mouse cursor
108        self.set_mouse_visible(False)
109
110        # Set the background color
111        arcade.set_background_color(arcade.color.AMAZON)
112
113    def on_draw(self):
114
115        # This command has to happen before we start drawing
116        self.clear()
117
118        # Draw all the sprites.
119        self.all_sprites_list.draw()
120
121        # Put the text on the screen.
122        output = "Score: " + str(self.score)
123        arcade.draw_text(output, 10, 20, arcade.color.WHITE, 14)
124
125    def on_mouse_motion(self, x, y, dx, dy):
126        self.player_sprite.center_x = x
127        self.player_sprite.center_y = y
128
129    def on_update(self, delta_time):
130        """ Movement and game logic """
131
132        # Call update on all sprites (The sprites don't do much in this
133        # example though.)
134        self.all_sprites_list.update()
135
136        # Generate a list of all sprites that collided with the player.
137        hit_list = arcade.check_for_collision_with_list(self.player_sprite,
138                                                        self.coin_list)
139
140        # Loop through each colliding sprite, remove it, and add to the score.
141        for coin in hit_list:
142            self.score += 1
143            coin.remove_from_sprite_lists()
144
145
146def main():
147    window = MyGame(SCREEN_WIDTH, SCREEN_HEIGHT, SCREEN_TITLE)
148    window.start_new_game()
149    arcade.run()
150
151
152if __name__ == "__main__":
153    main()