161 lines
4.7 KiB
Python
161 lines
4.7 KiB
Python
"""
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Sprite Collect Coins Moving in Circles
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Simple program to show basic sprite usage.
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Artwork from http://kenney.nl
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If Python and Arcade are installed, this example can be run from the command line with:
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python -m arcade.examples.sprite_collect_coins_move_circle
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"""
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import random
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import arcade
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import math
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import os
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SPRITE_SCALING = 0.5
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SCREEN_WIDTH = 800
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SCREEN_HEIGHT = 600
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SCREEN_TITLE = "Sprite Collect Coins Moving in Circles Example"
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class Coin(arcade.Sprite):
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def __init__(self, filename, sprite_scaling):
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""" Constructor. """
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# Call the parent class (Sprite) constructor
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super().__init__(filename, sprite_scaling)
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# Current angle in radians
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self.circle_angle = 0
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# How far away from the center to orbit, in pixels
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self.circle_radius = 0
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# How fast to orbit, in radians per frame
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self.circle_speed = 0.008
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# Set the center of the point we will orbit around
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self.circle_center_x = 0
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self.circle_center_y = 0
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def update(self):
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""" Update the ball's position. """
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# Calculate a new x, y
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self.center_x = self.circle_radius * math.sin(self.circle_angle) \
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+ self.circle_center_x
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self.center_y = self.circle_radius * math.cos(self.circle_angle) \
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+ self.circle_center_y
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# Increase the angle in prep for the next round.
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self.circle_angle += self.circle_speed
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class MyGame(arcade.Window):
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""" Main application class. """
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def __init__(self, width, height, title):
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super().__init__(width, height, title)
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# Set the working directory (where we expect to find files) to the same
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# directory this .py file is in. You can leave this out of your own
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# code, but it is needed to easily run the examples using "python -m"
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# as mentioned at the top of this program.
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file_path = os.path.dirname(os.path.abspath(__file__))
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os.chdir(file_path)
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# Sprite lists
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self.all_sprites_list = None
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self.coin_list = None
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# Set up the player
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self.score = 0
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self.player_sprite = None
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def start_new_game(self):
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""" Set up the game and initialize the variables. """
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# Sprite lists
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self.all_sprites_list = arcade.SpriteList()
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self.coin_list = arcade.SpriteList()
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# Set up the player
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self.score = 0
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# Character image from kenney.nl
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self.player_sprite = arcade.Sprite("images/character.png", SPRITE_SCALING)
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self.player_sprite.center_x = 50
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self.player_sprite.center_y = 70
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self.all_sprites_list.append(self.player_sprite)
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for i in range(50):
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# Create the coin instance
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# Coin image from kenney.nl
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coin = Coin("images/coin_01.png", SPRITE_SCALING / 3)
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# Position the center of the circle the coin will orbit
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coin.circle_center_x = random.randrange(SCREEN_WIDTH)
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coin.circle_center_y = random.randrange(SCREEN_HEIGHT)
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# Random radius from 10 to 200
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coin.circle_radius = random.randrange(10, 200)
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# Random start angle from 0 to 2pi
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coin.circle_angle = random.random() * 2 * math.pi
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# Add the coin to the lists
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self.all_sprites_list.append(coin)
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self.coin_list.append(coin)
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# Don't show the mouse cursor
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self.set_mouse_visible(False)
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# Set the background color
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arcade.set_background_color(arcade.color.AMAZON)
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def on_draw(self):
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# This command has to happen before we start drawing
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arcade.start_render()
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# Draw all the sprites.
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self.all_sprites_list.draw()
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# Put the text on the screen.
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output = "Score: " + str(self.score)
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arcade.draw_text(output, 10, 20, arcade.color.WHITE, 14)
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def on_mouse_motion(self, x, y, dx, dy):
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self.player_sprite.center_x = x
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self.player_sprite.center_y = y
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def update(self, delta_time):
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""" Movement and game logic """
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# Call update on all sprites (The sprites don't do much in this
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# example though.)
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self.all_sprites_list.update()
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# Generate a list of all sprites that collided with the player.
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hit_list = arcade.check_for_collision_with_list(self.player_sprite,
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self.coin_list)
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# Loop through each colliding sprite, remove it, and add to the score.
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for coin in hit_list:
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self.score += 1
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coin.kill()
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def main():
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window = MyGame(SCREEN_WIDTH, SCREEN_HEIGHT, SCREEN_TITLE)
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window.start_new_game()
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arcade.run()
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if __name__ == "__main__":
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main()
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