"""
Sprite Collect Coins
Simple program to show basic sprite usage.
Artwork from http://kenney.nl
"""
import random
import arcade
import math
SPRITE_SCALING = 0.5
SCREEN_WIDTH = 800
SCREEN_HEIGHT = 600
class Coin(arcade.Sprite):
"""
This class represents the coins on our screen. It is a child class of
the arcade library's "Sprite" class.
"""
def __init__(self, filename, sprite_scaling):
""" Constructor. """
# Call the parent class (Sprite) constructor
super().__init__(filename, sprite_scaling)
# Current angle in radians
self.angle = 0
# How far away from the center to orbit, in pixels
self.radius = 0
# How fast to orbit, in radians per frame
self.speed = 0.008
# Set the center of the point we will orbit around
self.circle_center_x = 0
self.circle_center_y = 0
def update(self):
""" Update the ball's position. """
# Calculate a new x, y
self.center_x = self.radius * math.sin(self.angle) \
+ self.circle_center_x
self.center_y = self.radius * math.cos(self.angle) \
+ self.circle_center_y
# Increase the angle in prep for the next round.
self.angle += self.speed
class MyApplication(arcade.Window):
""" Main application class. """
def __init__(self, width, height):
"""
Initializer
:param width:
:param height:
"""
super().__init__(width, height)
# 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",
SPRITE_SCALING)
self.player_sprite.center_x = 50
self.player_sprite.center_y = 70
self.all_sprites_list.append(self.player_sprite)
for i in range(50):
# Create the coin instance
coin = Coin("images/coin_01.png", SPRITE_SCALING / 3)
# Position the center of the circle the coin will orbit
coin.circle_center_x = random.randrange(SCREEN_WIDTH)
coin.circle_center_y = random.randrange(SCREEN_HEIGHT)
# Random radius from 10 to 200
coin.radius = random.randrange(10, 200)
# Random start angle from 0 to 2pi
coin.angle = random.random() * 2 * math.pi
# 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 animate(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
window = MyApplication(SCREEN_WIDTH, SCREEN_HEIGHT)
window.setup()
arcade.run()
