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aliens.py
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aliens.py
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# -- STAR FIGHT --
# ====================
# _______________
# Date - 28102020
# ¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯
import pygame
from pygame.sprite import Sprite
class Alien(Sprite):
"""Models a single alien in the alien fleet"""
def __init__(self, sf_game):
super().__init__()
self.screen = sf_game.screen
self.settings = sf_game.settings
# Load the image and set its rect attribute
self.image = pygame.image.load('Images/Alien.bmp')
self.rect = self.image.get_rect()
# Start each alien at top left of the screen
# With the padding of its width and height
self.rect.x = self.rect.width
self.rect.y = self.rect.height
# Store exact position of the alien in float
self.x = float(self.rect.x)
def check_edges(self):
"""Returns True when an alien has touched the edges of the screen"""
screen_rect = self.screen.get_rect()
space = self.settings.alien_space_from_edge
if self.rect.right >= (screen_rect.right - space) or self.rect.left <= space:
return True
def update(self):
"""Update the position of the alien"""
self.x += (self.settings.alien_x_speed * self.settings.fleet_direction)
self.rect.x = self.x