ship.py. settings.py

ship. py

import pygame

from pygame. sprite import Sprite

class Ship(Sprite):

def __init__(self, ai_settings, screen):

" " " Initialize the ship, and set its starting position. " " "

super(Ship, self). __init__()

self. screen = screen

self. ai_settings = ai_settings

# Load the ship image, and get its rect.

self. image = pygame. image. load('images/shooter. bmp')

self. rect = self. image. get_rect()

self. screen_rect = screen. get_rect()

# Start each new ship at the bottom center of the screen.

self. rect. centerx = self. screen_rect. centerx

self. rect. bottom = self. screen_rect. bottom

# Store a decimal value for the ship's center.

self. center = float(self. rect. centerx)

# Movement flags.

self. moving_right = False

self. moving_left = False

def center_ship(self):

" " " Center the ship on the screen. " " "

self. center = self. screen_rect. centerx

def update(self):

" " " Update the ship's position, based on movement flags. " " "

# Update the ship's center value, not the rect.

if self. moving_right and self. rect. right< self. screen_rect. right:

self. center += self. ai_settings. ship_speed_factor

if self. moving_left and self. rect. left> 0:

self. center -= self. ai_settings. ship_speed_factor

# Update rect object from self. center.

self. rect. centerx = self. center

def blitme(self):

" " " Draw the ship at its current location. " " "

self. screen. blit(self. image, self. rect)

***************************************************************************

settings. py

class Settings():

" " " A class to store all settings for Alien Invasion. " " "

def __init__(self):

" " " Initialize the game's static settings. " " "

# Screen settings.

self. screen_width = 1423 #1200

self. screen_height = 800

self. bg_color = (230, 230, 230)

# Ship settings.

self. ship_limit = 3

# Bullet settings.

self. bullet_width = 3

self. bullet_height = 15

self. bullet_color = 60, 60, 60

self. bullets_allowed = 3

# Alien settings.

self. fleet_drop_speed = 10

# How quickly the game speeds up.

self. speedup_scale = 1. 1

# How quickly the alien point values increase.

self. score_scale = 1. 5

self. initialize_dynamic_settings()

def initialize_dynamic_settings(self):

" " " Initialize settings that change throughout the game. " " "

self. ship_speed_factor = 1. 5

self. bullet_speed_factor = 3

self. alien_speed_factor = 1

# Scoring.

self. alien_points = 50

# fleet_direction of 1 represents right, -1 represents left.

self. fleet_direction = 1

def increase_speed(self):

" " " Increase speed settings and alien point values. " " "

self. ship_speed_factor *= self. speedup_scale

self. bullet_speed_factor *= self. speedup_scale

self. alien_speed_factor *= self. speedup_scale

self. alien_points = int(self. alien_points * self. score_scale)

*****************************************************************