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