Sprite Move By Keyboard#
sprite_move_keyboard.py#
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Move Sprite With Keyboard
Simple program to show moving a sprite with the keyboard.
The sprite_move_keyboard_better.py example is slightly better
in how it works, but also slightly more complex.
Artwork from https://kenney.nl
If Python and Arcade are installed, this example can be run from the command line with:
python -m arcade.examples.sprite_move_keyboard
"""
import arcade
SPRITE_SCALING = 0.5
SCREEN_WIDTH = 800
SCREEN_HEIGHT = 600
SCREEN_TITLE = "Move Sprite with Keyboard Example"
MOVEMENT_SPEED = 5
class Player(arcade.Sprite):
""" Player Class """
def update(self):
""" Move the player """
# Move player.
# Remove these lines if physics engine is moving player.
self.center_x += self.change_x
self.center_y += self.change_y
# Check for out-of-bounds
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 MyGame(arcade.Window):
"""
Main application class.
"""
def __init__(self, width, height, title):
"""
Initializer
"""
# Call the parent class initializer
super().__init__(width, height, title)
# Variables that will hold sprite lists
self.player_list = None
# Set up the player info
self.player_sprite = None
# 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.player_list = arcade.SpriteList()
# Set up the player
self.player_sprite = Player(":resources:images/animated_characters/female_person/"
"femalePerson_idle.png", SPRITE_SCALING)
self.player_sprite.center_x = 50
self.player_sprite.center_y = 50
self.player_list.append(self.player_sprite)
def on_draw(self):
"""
Render the screen.
"""
# This command has to happen before we start drawing
self.clear()
# Draw all the sprites.
self.player_list.draw()
def on_update(self, delta_time):
""" Movement and game logic """
# Move the player
self.player_list.update()
def on_key_press(self, key, modifiers):
"""Called whenever a key is pressed. """
# If the player presses a key, update the speed
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 a player releases a key, zero out the speed.
# This doesn't work well if multiple keys are pressed.
# Use 'better move by keyboard' example if you need to
# handle this.
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 main():
""" Main function """
window = MyGame(SCREEN_WIDTH, SCREEN_HEIGHT, SCREEN_TITLE)
window.setup()
arcade.run()
if __name__ == "__main__":
main()
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