Sprite: Face Left or Right

sprite_face_left_or_right.py
  1
  2
  3
  4
  5
  6
  7
  8
  9
 10
 11
 12
 13
 14
 15
 16
 17
 18
 19
 20
 21
 22
 23
 24
 25
 26
 27
 28
 29
 30
 31
 32
 33
 34
 35
 36
 37
 38
 39
 40
 41
 42
 43
 44
 45
 46
 47
 48
 49
 50
 51
 52
 53
 54
 55
 56
 57
 58
 59
 60
 61
 62
 63
 64
 65
 66
 67
 68
 69
 70
 71
 72
 73
 74
 75
 76
 77
 78
 79
 80
 81
 82
 83
 84
 85
 86
 87
 88
 89
 90
 91
 92
 93
 94
 95
 96
 97
 98
 99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
"""
Sprite Move With Keyboard
Face left or right depending on our direction

Simple program to show basic sprite usage.

Artwork from http://kenney.nl
"""
import arcade

SPRITE_SCALING = 0.5

SCREEN_WIDTH = 800
SCREEN_HEIGHT = 600

MOVEMENT_SPEED = 5


class Player(arcade.Sprite):

    def __init__(self):
        super().__init__()

        # Load a left facing texture and a right facing texture.
        # mirrored=True will mirror the image we load.
        self.texture_left = arcade.load_texture("images/character.png", mirrored=True, scale=SPRITE_SCALING)
        self.texture_right = arcade.load_texture("images/character.png", scale=SPRITE_SCALING)

        # By default, face right.
        self.texture = self.texture_right

    def update(self):
        self.center_x += self.change_x
        self.center_y += self.change_y

        # Figure out if we should face left or right
        if self.change_x < 0:
            self.texture = self.texture_left
        if self.change_x > 0:
            self.texture = self.texture_right

        if self.left < 0:
            self.left = 0
        elif self.right > SCREEN_WIDTH - 1:
            self.right = SCREEN_WIDTH - 1

        if self.bottom < 0:
            self.bottom = 0
        elif self.top > SCREEN_HEIGHT - 1:
            self.top = SCREEN_HEIGHT - 1


class MyApplication(arcade.Window):
    """
    Main application class.
    """

    def __init__(self, width, height):
        """
        Initializer
        """

        # Call the parent class initializer
        super().__init__(width, height)

        # Variables that will hold sprite lists
        self.all_sprites_list = None

        # Set up the player info
        self.player_sprite = None
        self.score = 0

        # Set the background color
        arcade.set_background_color(arcade.color.AMAZON)

    def setup(self):
        """ Set up the game and initialize the variables. """

        # Sprite lists
        self.all_sprites_list = arcade.SpriteList()

        # Set up the player
        self.score = 0
        self.player_sprite = Player()
        self.player_sprite.center_x = SCREEN_WIDTH / 2
        self.player_sprite.center_y = SCREEN_HEIGHT / 2
        self.all_sprites_list.append(self.player_sprite)

    def on_draw(self):
        """
        Render the screen.
        """

        # This command has to happen before we start drawing
        arcade.start_render()

        # Draw all the sprites.
        self.all_sprites_list.draw()

    def update(self, delta_time):
        """ Movement and game logic """

        # Call update on all sprites (The sprites don't do much in this
        # example though.)
        self.all_sprites_list.update()

    def on_key_press(self, key, modifiers):
        """Called whenever a key is pressed. """

        if key == arcade.key.UP:
            self.player_sprite.change_y = MOVEMENT_SPEED
        elif key == arcade.key.DOWN:
            self.player_sprite.change_y = -MOVEMENT_SPEED
        elif key == arcade.key.LEFT:
            self.player_sprite.change_x = -MOVEMENT_SPEED
        elif key == arcade.key.RIGHT:
            self.player_sprite.change_x = MOVEMENT_SPEED

    def on_key_release(self, key, modifiers):
        """Called when the user releases a key. """

        if key == arcade.key.UP or key == arcade.key.DOWN:
            self.player_sprite.change_y = 0
        elif key == arcade.key.LEFT or key == arcade.key.RIGHT:
            self.player_sprite.change_x = 0


window = MyApplication(SCREEN_WIDTH, SCREEN_HEIGHT)
window.setup()

arcade.run()