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ship.py
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ship.py
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import pygame
from pygame.sprite import Sprite
class Ship(Sprite):
"""A class to manege the ship"""
def __init__(self, ai_game):
"""Initialize the ship and set its starting position."""
super().__init__()
self.screen = ai_game.screen
self.settings = ai_game.settings
self.screen_rect = ai_game.screen.get_rect()
# Load the ship image and get its react.
self.image = pygame.image.load('images/ship.bmp')
self.rect = self.image.get_rect()
# Start each new ship at the bottom center of the screen.
self.rect.midbottom = self.screen_rect.midbottom
# Store a decimal value for the ship's horizontal position.
self.x = float(self.rect.x)
self.y = float(self.rect.y)
# Movement flag
self.moving_right = False
self.moving_left = False
def update(self):
"""Update the ship's positiion based on the movement flag."""
# Update the ship's x value, not the rect.
if self.moving_right and self.rect.right < self.screen_rect.right:
self.x += self.settings.ship_speed
if self.moving_left and self.rect.left > 0:
self.x -= self.settings.ship_speed
# Update rect object from self.x.
self.rect.x = self.x
def blitme(self):
"""Draw the ship at its current location."""
self.screen.blit(self.image, self.rect)
def center_ship(self):
"""Center the ship on the screen."""
self.rect.midbottom = self.screen_rect.midbottom
self.x = float(self.rect.x)