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204 | """
Move with a Sprite Animation
Simple program to show basic sprite usage.
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_animation
"""
import arcade
import random
SCREEN_WIDTH = 800
SCREEN_HEIGHT = 600
SCREEN_TITLE = "Move with a Sprite Animation Example"
COIN_SCALE = 0.5
COIN_COUNT = 50
CHARACTER_SCALING = 1
# How fast to move, and how fast to run the animation
MOVEMENT_SPEED = 5
UPDATES_PER_FRAME = 5
# Constants used to track if the player is facing left or right
RIGHT_FACING = 0
LEFT_FACING = 1
def load_texture_pair(filename):
"""
Load a texture pair, with the second being a mirror image.
"""
return [
arcade.load_texture(filename),
arcade.load_texture(filename, flipped_horizontally=True)
]
class PlayerCharacter(arcade.Sprite):
def __init__(self):
# Set up parent class
super().__init__()
# Default to face-right
self.character_face_direction = RIGHT_FACING
# Used for flipping between image sequences
self.cur_texture = 0
self.scale = CHARACTER_SCALING
# Adjust the collision box. Default includes too much empty space
# side-to-side. Box is centered at sprite center, (0, 0)
self.points = [[-22, -64], [22, -64], [22, 28], [-22, 28]]
# --- Load Textures ---
# Images from Kenney.nl's Asset Pack 3
main_path = ":resources:images/animated_characters/female_adventurer/femaleAdventurer"
# main_path = ":resources:images/animated_characters/female_person/femalePerson"
# main_path = ":resources:images/animated_characters/male_person/malePerson"
# main_path = ":resources:images/animated_characters/male_adventurer/maleAdventurer"
# main_path = ":resources:images/animated_characters/zombie/zombie"
# main_path = ":resources:images/animated_characters/robot/robot"
# Load textures for idle standing
self.idle_texture_pair = load_texture_pair(f"{main_path}_idle.png")
# Load textures for walking
self.walk_textures = []
for i in range(8):
texture = load_texture_pair(f"{main_path}_walk{i}.png")
self.walk_textures.append(texture)
def update_animation(self, delta_time: float = 1 / 60):
# Figure out if we need to flip face left or right
if self.change_x < 0 and self.character_face_direction == RIGHT_FACING:
self.character_face_direction = LEFT_FACING
elif self.change_x > 0 and self.character_face_direction == LEFT_FACING:
self.character_face_direction = RIGHT_FACING
# Idle animation
if self.change_x == 0 and self.change_y == 0:
self.texture = self.idle_texture_pair[self.character_face_direction]
return
# Walking animation
self.cur_texture += 1
if self.cur_texture > 7 * UPDATES_PER_FRAME:
self.cur_texture = 0
frame = self.cur_texture // UPDATES_PER_FRAME
direction = self.character_face_direction
self.texture = self.walk_textures[frame][direction]
class MyGame(arcade.Window):
""" Main application class. """
def __init__(self, width, height, title):
""" Set up the game and initialize the variables. """
super().__init__(width, height, title)
# Sprite lists
self.player_list = None
self.coin_list = None
# Set up the player
self.score = 0
self.player = None
def setup(self):
self.player_list = arcade.SpriteList()
self.coin_list = arcade.SpriteList()
# Set up the player
self.score = 0
self.player = PlayerCharacter()
self.player.center_x = SCREEN_WIDTH // 2
self.player.center_y = SCREEN_HEIGHT // 2
self.player.scale = 0.8
self.player_list.append(self.player)
for i in range(COIN_COUNT):
coin = arcade.Sprite(":resources:images/items/gold_1.png",
scale=0.5)
coin.center_x = random.randrange(SCREEN_WIDTH)
coin.center_y = random.randrange(SCREEN_HEIGHT)
self.coin_list.append(coin)
# 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.coin_list.draw()
self.player_list.draw()
# Put the text on the screen.
output = f"Score: {self.score}"
arcade.draw_text(output, 10, 20, arcade.color.WHITE, 14)
def on_key_press(self, key, modifiers):
"""
Called whenever a key is pressed.
"""
if key == arcade.key.UP:
self.player.change_y = MOVEMENT_SPEED
elif key == arcade.key.DOWN:
self.player.change_y = -MOVEMENT_SPEED
elif key == arcade.key.LEFT:
self.player.change_x = -MOVEMENT_SPEED
elif key == arcade.key.RIGHT:
self.player.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.change_y = 0
elif key == arcade.key.LEFT or key == arcade.key.RIGHT:
self.player.change_x = 0
def on_update(self, delta_time):
""" Movement and game logic """
# Move the player
self.player_list.update()
# Update the players animation
self.player_list.update_animation()
# Generate a list of all sprites that collided with the player.
hit_list = arcade.check_for_collision_with_list(self.player, self.coin_list)
# Loop through each colliding sprite, remove it, and add to the score.
for coin in hit_list:
coin.remove_from_sprite_lists()
self.score += 1
def main():
""" Main function """
window = MyGame(SCREEN_WIDTH, SCREEN_HEIGHT, SCREEN_TITLE)
window.setup()
arcade.run()
if __name__ == "__main__":
main()
|