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alien_invasion.py
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alien_invasion.py
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import sys
import json
import pygame
from time import sleep
from settings import Settings
from ship import Ship
from bullet import Bullet
from alien import Alien
from game_stats import GameStats
from button import Button
from scoreboard import Scoreboard
class AlienInvasion():
def __init__(self):
pygame.init()
self.setts=Settings()
self.screen=pygame.display.set_mode(
(0,0))#,pygame.FULLSCREEN)
self.setts.screen_width=self.screen.get_rect().width
self.setts.screen_height=self.screen.get_rect().height
pygame.display.set_caption("Alien Invasion")
self.play_button=Button(self,"Play")
pygame.mixer.music.load('music/background_XX_intro.mp3')
pygame.mixer.music.play(-1)
self.sound_ship_attack=pygame.mixer.Sound('music/ship_attack.mp3')
self.sound_ship_attack.set_volume(0.2)
self.sound_level_success=pygame.mixer.Sound('music/new_level.mp3')
self.sound_level_failure=pygame.mixer.Sound('music/failure_level.mp3')
self.sound_level_failure.set_volume(0.6)
self.sound_alien_ship=pygame.mixer.Sound('music/alien_ship_collision.mp3')
self.sound_alien_ship.set_volume(0.3)
self.stats=GameStats(self)
self.sb=Scoreboard(self)
self.ship=Ship(self)
self.bull=pygame.sprite.Group()
self.aliens=pygame.sprite.Group()
self._create_fleet()
def run_game(self):
while True:
self._check_events()
if self.stats.game_active:
self.ship.update()
self._update_bullets()
self._update_aliens()
self._update_screen()
def _check_events(self):
"""Managing user mouse and keyboard"""
for event in pygame.event.get():
if event.type==pygame.QUIT:
sys.exit()
elif event.type==pygame.KEYDOWN:
self._check_keydown_events(event)
elif event.type==pygame.KEYUP:
self._check_keyup_events(event)
elif event.type==pygame.MOUSEBUTTONDOWN:
mouse_pos=pygame.mouse.get_pos()
self._check_play_button(mouse_pos)
def _check_play_button(self,mouse_pos):
if self.play_button.rect.collidepoint(mouse_pos) and not self.stats.game_active:
self.stats.reset_stats()
self.stats.game_active=True
self.aliens.empty()
self.bull.empty()
self._create_fleet()
self.ship.center_ship()
pygame.mouse.set_visible(False)
self.sb.prep_level()
self.sb.prep_ships()
def _check_keydown_events(self,event):
if event.key==pygame.K_ESCAPE:
if self.stats.game_active==False:
self.stats.game_active=True
else:
self.stats.game_active=False
if event.key==pygame.K_RIGHT:
self.ship.moving_r=True
if event.key==pygame.K_LEFT:
self.ship.moving_l=True
if event.key==pygame.K_q:
self._write_record(self.stats.high_score)
sys.exit()
if event.key==pygame.K_SPACE and self.stats.game_active:
self.sound_ship_attack.play()
self._fire_bullet()
if event.key==pygame.K_1:
pygame.mixer.music.pause()
if event.key==pygame.K_2:
pygame.mixer.music.set_volume(pygame.mixer.music.get_volume()*0.5)
if event.key==pygame.K_3:
pygame.mixer.music.unpause()
pygame.mixer.music.set_volume(1)
if event.key==pygame.K_s:
if self.stats.game_active:
if self.stats.ships_left>0:
self.stats.ships_left-=1
self.sb.prep_ships()
if self.stats.ships_left==0:
self.stats.game_active=False
self.sound_level_failure.play()
self.stats.reset_stats()
self.sb.prep_score()
pygame.mouse.set_visible(True)
def _check_keyup_events(self,event):
if event.key==pygame.K_RIGHT:
self.ship.moving_r=False
if event.key==pygame.K_LEFT:
self.ship.moving_l=False
def _check_fleet_edges(self):
for alien in self.aliens.sprites():
if alien.check_edges():
self._change_fleet_direction()
break
def _check_aliens_bottom(self):
screen_rect=self.screen.get_rect()
for alien in self.aliens.sprites():
if alien.rect.bottom>=screen_rect.bottom:
self._ship_hit()
break
def _change_fleet_direction(self):
for alien in self.aliens.sprites():
alien.rect.y+=self.setts.fleet_drop_speed
self.setts.fleet_direction*=-1
def _fire_bullet(self):
"""Creating new bullet and including it into bullets' group"""
if len(self.bull)<self.setts.bullets_allowed:
new_bullet=Bullet(self)
self.bull.add(new_bullet)
def _update_bullets(self):
"""Update position and remove irrelevant bullets"""
self.bull.update()
for b in self.bull.copy():
if b.rect.bottom <=0:
self.bull.remove(b)
self._check_bullet_alien_collisions()
#print(len(self.bull)) -debug
def _check_bullet_alien_collisions(self):
collisions=pygame.sprite.groupcollide(
self.bull,self.aliens,True,True)
if collisions:
for al in collisions.values():
self.stats.score+=self.setts.alien_points*len(al)
self.sb.prep_score()
self.sb.check_high_score()
if not self.aliens:
self.bull.empty()
self.setts.increase_speed()
self.sound_level_success.play()
self.stats.level+=1
self.sb.prep_level()
self._create_fleet()
def _update_aliens(self):
self._check_fleet_edges()
self.aliens.update()
"""check alien-ship collision"""
if pygame.sprite.spritecollideany(self.ship,self.aliens):
self._ship_hit()
self._check_aliens_bottom()
def _ship_hit(self):
if self.stats.ships_left > 0:
self.stats.ships_left-=1
self.sound_alien_ship.play()
self.sb.prep_ships()
self.aliens.empty()
self.bull.empty()
self._create_fleet()
self.ship.center_ship()
sleep(1)
if self.stats.ships_left==0:
self.stats.game_active=False
self.sound_level_failure.play()
self.stats.reset_stats()
self.sb.prep_score()
pygame.mouse.set_visible(True)
def _create_fleet(self):
new_alien=Alien(self)
alien_width=new_alien.rect.width
alien_height=new_alien.rect.height
ship_height=self.ship.rect.height
available_space_x=(self.setts.screen_width-
(2*alien_width))
available_space_y=(self.setts.screen_height-
(3*alien_height)-ship_height)
number_aliens_x=available_space_x//(2*alien_width)
number_rows=available_space_y//(2*alien_height)
for row in range(number_rows):
for al in range(number_aliens_x):
self._create_alian(al,row)
def _create_alian(self,al_number,row_number):
new_alien=Alien(self)
alien_width=new_alien.rect.width
new_alien.x=alien_width+alien_width*2*al_number
new_alien.rect.x=new_alien.x
new_alien.rect.y=(new_alien.rect.height+
2*new_alien.rect.height*row_number)
self.aliens.add(new_alien)
def _write_record(self,record):
filename=self.setts.record_filename
f=open(filename,'w')
json.dump(record,f)
f.close()
def _update_screen(self):
self.screen.fill(self.setts.bg_color)
self.ship.blitme()
for b in self.bull.sprites():
b.draw_bullet()
self.aliens.draw(self.screen)
self.sb.show_score()
if not self.stats.game_active:
self.play_button.draw_button()
pygame.display.flip()
if __name__=='__main__':
ai=AlienInvasion()
ai.run_game()