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, scale):
 26        """ Constructor. """
 27        # Call the parent class (Sprite) constructor
 28        super().__init__(filename, scale=scale)
 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(
 82            ":resources:images/animated_characters/female_person/femalePerson_idle.png",
 83            scale=SPRITE_SCALING
 84        )
 85        self.player_sprite.center_x = 50
 86        self.player_sprite.center_y = 70
 87        self.all_sprites_list.append(self.player_sprite)
 88
 89        for i in range(50):
 90
 91            # Create the coin instance
 92            # Coin image from kenney.nl
 93            coin = Coin(":resources:images/items/coinGold.png", scale=SPRITE_SCALING / 3)
 94
 95            # Position the center of the circle the coin will orbit
 96            coin.circle_center_x = random.randrange(SCREEN_WIDTH)
 97            coin.circle_center_y = random.randrange(SCREEN_HEIGHT)
 98
 99            # Random radius from 10 to 200
100            coin.circle_radius = random.randrange(10, 200)
101
102            # Random start angle from 0 to 2pi
103            coin.circle_angle = random.random() * 2 * math.pi
104
105            # Add the coin to the lists
106            self.all_sprites_list.append(coin)
107            self.coin_list.append(coin)
108
109        # Don't show the mouse cursor
110        self.set_mouse_visible(False)
111
112        # Set the background color
113        self.background_color = arcade.color.AMAZON
114
115    def on_draw(self):
116
117        # This command has to happen before we start drawing
118        self.clear()
119
120        # Draw all the sprites.
121        self.all_sprites_list.draw()
122
123        # Put the text on the screen.
124        output = "Score: " + str(self.score)
125        arcade.draw_text(output, 10, 20, arcade.color.WHITE, 14)
126
127    def on_mouse_motion(self, x, y, dx, dy):
128        self.player_sprite.center_x = x
129        self.player_sprite.center_y = y
130
131    def on_update(self, delta_time):
132        """ Movement and game logic """
133
134        # Call update on all sprites (The sprites don't do much in this
135        # example though.)
136        self.all_sprites_list.update()
137
138        # Generate a list of all sprites that collided with the player.
139        hit_list = arcade.check_for_collision_with_list(self.player_sprite,
140                                                        self.coin_list)
141
142        # Loop through each colliding sprite, remove it, and add to the score.
143        for coin in hit_list:
144            self.score += 1
145            coin.remove_from_sprite_lists()
146
147
148def main():
149    window = MyGame(SCREEN_WIDTH, SCREEN_HEIGHT, SCREEN_TITLE)
150    window.start_new_game()
151    arcade.run()
152
153
154if __name__ == "__main__":
155    main()