Sprites: Move with wallsΒΆ

Screenshot of using sprites to detect wall collisions
"""
Sprite Move With Walls

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

    def __init__(self, width, height):
        """
        Initializer
        """
        super().__init__(width, height)
        # Sprite lists
        self.all_sprites_list = None
        self.coin_list = None

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

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

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

        # Set up the player
        self.score = 0
        self.player_sprite = arcade.Sprite("images/character.png",
                                           SPRITE_SCALING)
        self.player_sprite.center_x = 50
        self.player_sprite.center_y = 64
        self.all_sprites_list.append(self.player_sprite)

        # -- Set up the walls
        # Create a row of boxes
        for x in range(173, 650, 64):
            wall = arcade.Sprite("images/boxCrate_double.png", SPRITE_SCALING)
            wall.center_x = x
            wall.center_y = 200
            self.all_sprites_list.append(wall)
            self.wall_list.append(wall)

        # Create a column of boxes
        for y in range(273, 500, 64):
            wall = arcade.Sprite("images/boxCrate_double.png", SPRITE_SCALING)
            wall.center_x = 465
            wall.center_y = y
            self.all_sprites_list.append(wall)
            self.wall_list.append(wall)

        self.physics_engine = arcade.PhysicsEngineSimple(self.player_sprite,
                                                         self.wall_list)

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

    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 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

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

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


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

arcade.run()