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