Platformer With Enemies#
sprite_enemies_in_platformer.py#
1"""
2Show how to do enemies in a platformer
3
4Artwork from: https://kenney.nl
5Tiled available from: https://www.mapeditor.org/
6
7If Python and Arcade are installed, this example can be run from the command line with:
8python -m arcade.examples.sprite_enemies_in_platformer
9"""
10
11import arcade
12
13SPRITE_SCALING = 0.5
14SPRITE_NATIVE_SIZE = 128
15SPRITE_SIZE = int(SPRITE_NATIVE_SIZE * SPRITE_SCALING)
16
17SCREEN_WIDTH = 800
18SCREEN_HEIGHT = 600
19SCREEN_TITLE = "Sprite Enemies in a Platformer Example"
20
21# How many pixels to keep as a minimum margin between the character
22# and the edge of the screen.
23VIEWPORT_MARGIN = 40
24RIGHT_MARGIN = 150
25
26# Physics
27MOVEMENT_SPEED = 5
28JUMP_SPEED = 14
29GRAVITY = 0.5
30
31
32class MyGame(arcade.Window):
33 """ Main application class. """
34
35 def __init__(self):
36 """
37 Initializer
38 """
39 super().__init__(SCREEN_WIDTH, SCREEN_HEIGHT, SCREEN_TITLE)
40
41 # Sprite lists
42 self.wall_list = None
43 self.enemy_list = None
44 self.player_list = None
45
46 # Set up the player
47 self.player_sprite = None
48 self.physics_engine = None
49 self.view_left = 0
50 self.view_bottom = 0
51 self.game_over = False
52
53 def setup(self):
54 """ Set up the game and initialize the variables. """
55
56 # Sprite lists
57 self.wall_list = arcade.SpriteList()
58 self.enemy_list = arcade.SpriteList()
59 self.player_list = arcade.SpriteList()
60
61 # Draw the walls on the bottom
62 for x in range(0, SCREEN_WIDTH, SPRITE_SIZE):
63 wall = arcade.Sprite(":resources:images/tiles/grassMid.png", scale=SPRITE_SCALING)
64
65 wall.bottom = 0
66 wall.left = x
67 self.wall_list.append(wall)
68
69 # Draw the platform
70 for x in range(SPRITE_SIZE * 3, SPRITE_SIZE * 8, SPRITE_SIZE):
71 wall = arcade.Sprite(":resources:images/tiles/grassMid.png", scale=SPRITE_SCALING)
72
73 wall.bottom = SPRITE_SIZE * 3
74 wall.left = x
75 self.wall_list.append(wall)
76
77 # Draw the crates
78 for x in range(0, SCREEN_WIDTH, SPRITE_SIZE * 5):
79 wall = arcade.Sprite(":resources:images/tiles/boxCrate_double.png", scale=SPRITE_SCALING)
80
81 wall.bottom = SPRITE_SIZE
82 wall.left = x
83 self.wall_list.append(wall)
84
85 # -- Draw an enemy on the ground
86 enemy = arcade.Sprite(":resources:images/enemies/wormGreen.png", scale=SPRITE_SCALING)
87
88 enemy.bottom = SPRITE_SIZE
89 enemy.left = SPRITE_SIZE * 2
90
91 # Set enemy initial speed
92 enemy.change_x = 2
93 self.enemy_list.append(enemy)
94
95 # -- Draw a enemy on the platform
96 enemy = arcade.Sprite(":resources:images/enemies/wormGreen.png", scale=SPRITE_SCALING)
97
98 enemy.bottom = SPRITE_SIZE * 4
99 enemy.left = SPRITE_SIZE * 4
100
101 # Set boundaries on the left/right the enemy can't cross
102 enemy.boundary_right = SPRITE_SIZE * 8
103 enemy.boundary_left = SPRITE_SIZE * 3
104 enemy.change_x = 2
105 self.enemy_list.append(enemy)
106
107 # -- Set up the player
108 self.player_sprite = arcade.Sprite(":resources:images/animated_characters/female_person/femalePerson_idle.png",
109 scale=SPRITE_SCALING)
110 self.player_list.append(self.player_sprite)
111
112 # Starting position of the player
113 self.player_sprite.center_x = 64
114 self.player_sprite.center_y = 270
115
116 self.physics_engine = arcade.PhysicsEnginePlatformer(self.player_sprite,
117 self.wall_list,
118 gravity_constant=GRAVITY)
119
120 # Set the background color
121 self.background_color = arcade.color.AMAZON
122
123 def on_draw(self):
124 """
125 Render the screen.
126 """
127
128 # This command has to happen before we start drawing
129 self.clear()
130
131 # Draw all the sprites.
132 self.player_list.draw()
133 self.wall_list.draw()
134 self.enemy_list.draw()
135
136 def on_key_press(self, key, modifiers):
137 """
138 Called whenever the mouse moves.
139 """
140 if key == arcade.key.UP:
141 if self.physics_engine.can_jump():
142 self.player_sprite.change_y = JUMP_SPEED
143 elif key == arcade.key.LEFT:
144 self.player_sprite.change_x = -MOVEMENT_SPEED
145 elif key == arcade.key.RIGHT:
146 self.player_sprite.change_x = MOVEMENT_SPEED
147
148 def on_key_release(self, key, modifiers):
149 """
150 Called when the user presses a mouse button.
151 """
152 if key == arcade.key.LEFT or key == arcade.key.RIGHT:
153 self.player_sprite.change_x = 0
154
155 def on_update(self, delta_time):
156 """ Movement and game logic """
157
158 # Update the player based on the physics engine
159 if not self.game_over:
160 # Move the enemies
161 self.enemy_list.update()
162
163 # Check each enemy
164 for enemy in self.enemy_list:
165 # If the enemy hit a wall, reverse
166 if len(arcade.check_for_collision_with_list(enemy, self.wall_list)) > 0:
167 enemy.change_x *= -1
168 # If the enemy hit the left boundary, reverse
169 elif enemy.boundary_left is not None and enemy.left < enemy.boundary_left:
170 enemy.change_x *= -1
171 # If the enemy hit the right boundary, reverse
172 elif enemy.boundary_right is not None and enemy.right > enemy.boundary_right:
173 enemy.change_x *= -1
174
175 # Update the player using the physics engine
176 self.physics_engine.update()
177
178 # See if the player hit a worm. If so, game over.
179 if len(arcade.check_for_collision_with_list(self.player_sprite, self.enemy_list)) > 0:
180 self.game_over = True
181
182
183def main():
184 window = MyGame()
185 window.setup()
186 arcade.run()
187
188
189if __name__ == "__main__":
190 main()