Aim and Shoot Bullets#
sprite_bullets_aimed.py#
1"""
2Sprite Bullets
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_bullets_aimed
10"""
11
12from __future__ import annotations
13
14import random
15import arcade
16import math
17
18SPRITE_SCALING_PLAYER = 0.5
19SPRITE_SCALING_COIN = 0.2
20SPRITE_SCALING_LASER = 0.8
21COIN_COUNT = 50
22
23SCREEN_WIDTH = 800
24SCREEN_HEIGHT = 600
25SCREEN_TITLE = "Sprites and Bullets Aimed Example"
26
27BULLET_SPEED = 5
28
29window = None
30
31
32class MyGame(arcade.Window):
33 """ Main application class. """
34
35 def __init__(self):
36 """ Initializer """
37 # Call the parent class initializer
38 super().__init__(SCREEN_WIDTH, SCREEN_HEIGHT, SCREEN_TITLE)
39
40 # Variables that will hold sprite lists
41 self.player_list = None
42 self.coin_list = None
43 self.bullet_list = None
44
45 # Set up the player info
46 self.player_sprite = None
47 self.score = 0
48 self.score_text = None
49
50 # Load sounds. Sounds from kenney.nl
51 self.gun_sound = arcade.sound.load_sound(":resources:sounds/laser1.wav")
52 self.hit_sound = arcade.sound.load_sound(":resources:sounds/phaseJump1.wav")
53
54 self.background_color = arcade.color.AMAZON
55
56 def setup(self):
57
58 """ Set up the game and initialize the variables. """
59
60 # Sprite lists
61 self.player_list = arcade.SpriteList()
62 self.coin_list = arcade.SpriteList()
63 self.bullet_list = arcade.SpriteList()
64
65 # Set up the player
66 self.score = 0
67
68 # Image from kenney.nl
69 self.player_sprite = arcade.Sprite(
70 ":resources:images/animated_characters/female_person/femalePerson_idle.png",
71 scale=SPRITE_SCALING_PLAYER)
72 self.player_sprite.center_x = 50
73 self.player_sprite.center_y = 70
74 self.player_list.append(self.player_sprite)
75
76 # Create the coins
77 for i in range(COIN_COUNT):
78
79 # Create the coin instance
80 # Coin image from kenney.nl
81 coin = arcade.Sprite(":resources:images/items/coinGold.png", scale=SPRITE_SCALING_COIN)
82
83 # Position the coin
84 coin.center_x = random.randrange(SCREEN_WIDTH)
85 coin.center_y = random.randrange(120, SCREEN_HEIGHT)
86
87 # Add the coin to the lists
88 self.coin_list.append(coin)
89
90 # Set the background color
91 self.background_color = arcade.color.AMAZON
92
93 def on_draw(self):
94 """ Render the screen. """
95
96 # This command has to happen before we start drawing
97 self.clear()
98
99 # Draw all the sprites.
100 self.coin_list.draw()
101 self.bullet_list.draw()
102 self.player_list.draw()
103
104 # Put the text on the screen.
105 output = f"Score: {self.score}"
106 arcade.draw_text(output, 10, 20, arcade.color.WHITE, 14)
107
108 def on_mouse_press(self, x, y, button, modifiers):
109 """ Called whenever the mouse button is clicked. """
110
111 # Create a bullet
112 bullet = arcade.Sprite(":resources:images/space_shooter/laserBlue01.png", scale=SPRITE_SCALING_LASER)
113
114 # Position the bullet at the player's current location
115 start_x = self.player_sprite.center_x
116 start_y = self.player_sprite.center_y
117 bullet.center_x = start_x
118 bullet.center_y = start_y
119
120 # Get from the mouse the destination location for the bullet
121 # IMPORTANT! If you have a scrolling screen, you will also need
122 # to add in self.view_bottom and self.view_left.
123 dest_x = x
124 dest_y = y
125
126 # Do math to calculate how to get the bullet to the destination.
127 # Calculation the angle in radians between the start points
128 # and end points. This is the angle the bullet will travel.
129 x_diff = dest_x - start_x
130 y_diff = dest_y - start_y
131 angle = math.atan2(y_diff, x_diff)
132
133 # Angle the bullet sprite so it doesn't look like it is flying
134 # sideways.
135 bullet.angle = math.degrees(angle)
136 print(f"Bullet angle: {bullet.angle:.2f}")
137
138 # Taking into account the angle, calculate our change_x
139 # and change_y. Velocity is how fast the bullet travels.
140 bullet.change_x = math.cos(angle) * BULLET_SPEED
141 bullet.change_y = math.sin(angle) * BULLET_SPEED
142
143 # Add the bullet to the appropriate lists
144 self.bullet_list.append(bullet)
145
146 def on_update(self, delta_time):
147 """ Movement and game logic """
148
149 # Call update on all sprites
150 self.bullet_list.update()
151
152 # Loop through each bullet
153 for bullet in self.bullet_list:
154
155 # Check this bullet to see if it hit a coin
156 hit_list = arcade.check_for_collision_with_list(bullet, self.coin_list)
157
158 # If it did, get rid of the bullet
159 if len(hit_list) > 0:
160 bullet.remove_from_sprite_lists()
161
162 # For every coin we hit, add to the score and remove the coin
163 for coin in hit_list:
164 coin.remove_from_sprite_lists()
165 self.score += 1
166
167 # If the bullet flies off-screen, remove it.
168 if bullet.bottom > self.width or bullet.top < 0 or bullet.right < 0 or bullet.left > self.width:
169 bullet.remove_from_sprite_lists()
170
171
172def main():
173 game = MyGame()
174 game.setup()
175 arcade.run()
176
177
178if __name__ == "__main__":
179 main()