Sprite Properties¶
sprite_properties.py¶
1"""
2Sprites with Properties Example
3
4Simple program to show how to store properties on sprites.
5
6Artwork from http://kenney.nl
7
8If Python and Arcade are installed, this example can be run from the command line with:
9python -m arcade.examples.sprite_properties
10
11"""
12
13import arcade
14import os
15
16# --- Constants ---
17SPRITE_SCALING_PLAYER = 0.5
18
19SCREEN_WIDTH = 800
20SCREEN_HEIGHT = 600
21SCREEN_TITLE = "Sprites with Properties Example"
22
23
24class MyGame(arcade.Window):
25 """ Our custom Window Class"""
26
27 def __init__(self):
28 """ Initializer """
29 # Call the parent class initializer
30 super().__init__(SCREEN_WIDTH, SCREEN_HEIGHT, SCREEN_TITLE)
31
32 # Set the working directory (where we expect to find files) to the same
33 # directory this .py file is in. You can leave this out of your own
34 # code, but it is needed to easily run the examples using "python -m"
35 # as mentioned at the top of this program.
36 file_path = os.path.dirname(os.path.abspath(__file__))
37 os.chdir(file_path)
38
39 # Variables that will hold sprite lists
40 self.player_list = None
41 self.coin_list = None
42
43 # Set up the player info
44 self.player_sprite = None
45
46 # Set up sprite that will serve as trigger
47 self.trigger_sprite = None
48
49 # Don't show the mouse cursor
50 self.set_mouse_visible(False)
51
52 arcade.set_background_color(arcade.color.AMAZON)
53
54 def setup(self):
55 """ Set up the game and initialize the variables. """
56
57 # Sprite lists
58 self.player_list = arcade.SpriteList()
59 self.coin_list = arcade.SpriteList()
60
61 # Set up the player
62 # Character image from kenney.nl
63 self.player_sprite = arcade.Sprite(":resources:images/animated_characters/female_person/femalePerson_idle.png", SPRITE_SCALING_PLAYER)
64 self.player_sprite.center_x = 50
65 self.player_sprite.center_y = 150
66 self.player_list.append(self.player_sprite)
67
68 # Create the sprites
69 for x in range(100, 800, 100):
70 coin = arcade.Sprite(":resources:images/items/coinGold.png", scale=0.3, center_x=x, center_y=400)
71 coin.intensity = 'dim'
72 coin.alpha = 64
73 self.coin_list.append(coin)
74
75 # Create trigger
76 self.trigger_sprite = arcade.Sprite(":resources:images/pinball/bumper.png", scale=0.5, center_x=750, center_y=50)
77
78 def on_draw(self):
79 """ Draw everything """
80 arcade.start_render()
81 self.coin_list.draw()
82 self.trigger_sprite.draw()
83 self.player_list.draw()
84
85 # Put the instructions on the screen.
86 instructions1 = "Touch a coin to set its intensity property to 'bright'."
87 arcade.draw_text(instructions1, 10, 90, arcade.color.WHITE, 14)
88 instructions2 = "Touch the trigger at the bottom-right to destroy all 'bright' sprites."
89 arcade.draw_text(instructions2, 10, 70, arcade.color.WHITE, 14)
90
91 # Query the property on the coins and show results.
92 coins_are_bright = [coin.intensity == 'bright' for coin in self.coin_list]
93 output_any = f"Any sprites have intensity=bright? : {any(coins_are_bright)}"
94 arcade.draw_text(output_any, 10, 40, arcade.color.WHITE, 14)
95 output_all = f"All sprites have intensity=bright? : {all(coins_are_bright)}"
96 arcade.draw_text(output_all, 10, 20, arcade.color.WHITE, 14)
97
98 def on_mouse_motion(self, x, y, dx, dy):
99 """ Handle Mouse Motion """
100
101 # Move the center of the player sprite to match the mouse x, y
102 self.player_sprite.center_x = x
103 self.player_sprite.center_y = y
104
105 def on_update(self, delta_time):
106 """ Movement and game logic """
107
108 # Call update on all sprites (The sprites don't do much in this
109 # example though.)
110 self.coin_list.update()
111
112 # Generate a list of all sprites that collided with the player.
113 coins_hit_list = arcade.check_for_collision_with_list(self.player_sprite, self.coin_list)
114
115 # Loop through each colliding sprite to set intensity=bright
116 for coin in coins_hit_list:
117 coin.intensity = 'bright'
118 coin.alpha = 255
119
120 hit_trigger = arcade.check_for_collision(self.player_sprite, self.trigger_sprite)
121 if hit_trigger:
122 intense_sprites = [sprite for sprite in self.coin_list if sprite.intensity == 'bright']
123 for coin in intense_sprites:
124 coin.remove_from_sprite_lists()
125
126
127def main():
128 """ Main method """
129 window = MyGame()
130 window.setup()
131 arcade.run()
132
133
134if __name__ == "__main__":
135 main()