I'm new to programming and would appreciate guidance/ feedback.
Below is a full working script:
I've managed to get the player sprite to be controlled by WASD, the asteroid sprite is also now rendered on the screen, with some physics to move it around. It should rebound off walls too but doesn't. But for some reason the update function isn't correctly calling on the Asteroid class, I believe - unless something else is wrong with it.
Greatly appreciate all help so ar and future guidance!
import arcade
import random
""" Universal variables """
SPRITE_SCALING_PLAYER = 0.5
SPRITE_SCALING_ASTEROID = 0.35
SCREEN_WIDTH = 800
SCREEN_HEIGHT = 600
MOVEMENT_SPEED = 5
class Player(arcade.Sprite):
# PLAYER
def update(self):
# COLLISION
self.center_x += self.change_x
self.center_y += self.change_y
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 Asteroid(arcade.Sprite):
# ASTEROID
def __init__(self, filename, sprite_scaling):
super().__init__(filename, sprite_scaling)
self.change_x = 0
self.change_y = 0
def update(self):
# Move the asteroid
self.center_x += self.change_x
self.center_y += self.change_y
# rebound
if self.left < 0:
self.change_x *= -1
if self.right > SCREEN_WIDTH:
self.change_x *= -1
if self.bottom < 0:
self.change_y *= -1
if self.top > SCREEN_HEIGHT:
self.change_y *= -1
# MAIN GAME CLASS
class MyGame(arcade.Window):
""" Our custom Window Class"""
def __init__(self):
""" Initializer """
# Call the parent class initializer
super().__init__(SCREEN_WIDTH, SCREEN_HEIGHT, "Alien")
# Background image will be stored in this variable
self.background = ("space_bg.png")
# Variables that will hold sprite lists
self.all_sprite_list = ["ufo_sprite.png", "asteroid.gif"]
# Set up player
self.player_sprite = self.all_sprite_list[0]
# Set up asteroid
self.asteroid_sprite = self.all_sprite_list[1]
# Don't show the mouse cursor
self.set_mouse_visible(False)
# arcade.set_background_color(arcade.color.BLACK)
def setup(self):
""" Set up the game and initialize the variables. """
# background
self.background = arcade.load_texture(self.background)
# Sprite lists
self.all_sprite_list = arcade.SpriteList()
# Set up the player
self.player_sprite = Player("ufo_sprite.png", SPRITE_SCALING_PLAYER)
self.player_sprite.center_x = (SCREEN_WIDTH * 0.50)
self.player_sprite.center_y = (SCREEN_HEIGHT * 0.50)
self.all_sprite_list.append(self.player_sprite)
# Set up asteroid
self.asteroid_sprite = Asteroid("asteroid.gif", SPRITE_SCALING_ASTEROID)
Asteroid.center_x = random.randrange(SCREEN_WIDTH)
Asteroid.center_y = random.randrange(SCREEN_HEIGHT)
Asteroid.change_x = random.randrange(-4, 4)
Asteroid.change_y = random.randrange(-4, 4)
self.all_sprite_list.append(self.asteroid_sprite)
def on_draw(self):
# needed before other drawn elements
arcade.start_render()
# draw background
arcade.draw_texture_rectangle(SCREEN_WIDTH // 2, SCREEN_HEIGHT // 2,
SCREEN_WIDTH, SCREEN_HEIGHT, self.background)
# draw sprites
self.all_sprite_list.draw()
def update(self, delta_time):
""" Movement and game logic """
self.all_sprite_list.update()
def on_key_press(self, key, modifiers):
"""Called whenever a key is pressed. """
if key == arcade.key.W:
self.player_sprite.change_y = MOVEMENT_SPEED
elif key == arcade.key.S:
self.player_sprite.change_y = -MOVEMENT_SPEED
elif key == arcade.key.A:
self.player_sprite.change_x = -MOVEMENT_SPEED
elif key == arcade.key.D:
self.player_sprite.change_x = MOVEMENT_SPEED
# elif key == arcade.key.SPACE:
# 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.W or key == arcade.key.S:
self.player_sprite.change_y = 0
elif key == arcade.key.A or key == arcade.key.D:
self.player_sprite.change_x = 0
# elif key == arcade.key.SPACE:
# self.player_sprite.change_y = (SCREEN_HEIGHT * 0.005)
def main():
""" Main method """
window = MyGame()
window.setup()
arcade.run()
arcade.schedule(update, 1 / 80)
if __name__ == "__main__":
main()
