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game_functions.py
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game_functions.py
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import sys
import pygame
import random
from alien import Alien
from bullet import Bullet
from beam import Beam
from high_scores import HighScoreScreen
from intro import Button, Intro, level_intro
from ufo import Ufo
from star import Star
def check_events(ai_settings, screen, stats, ship, bullets):
for event in pygame.event.get():
if event.type == pygame.QUIT:
stats.save_high_score()
sys.exit()
elif event.type == pygame.KEYDOWN:
check_keydown_events(event, ai_settings, screen, stats.game_active, ship, bullets)
elif event.type == pygame.KEYUP:
check_keyup_events(event, ship)
def start_new_game(ai_settings, screen, stats, sb,
ship, aliens, beams, bullets):
pygame.mouse.set_visible(False)
ai_settings.initialize_dynamic_settings()
stats.reset_stats()
stats.game_active = True
sb.prep_score()
sb.prep_high_score()
sb.prep_level()
sb.prep_ships()
aliens.empty()
bullets.empty()
beams.empty()
create_fleet(ai_settings, screen, ship, aliens)
stats.next_speedup = len(aliens) - (len(aliens) // 5)
stats.aliens_left = len(aliens)
ship.center_ship()
def check_keydown_events(event, ai_settings, screen, game_active, ship, bullets):
if event.key == pygame.K_RIGHT:
ship.moving_right = True
elif event.key == pygame.K_LEFT:
ship.moving_left = True
elif event.key == pygame.K_SPACE and game_active:
fire_bullet(ai_settings, screen, ship, bullets)
elif event.key == pygame.K_q:
sys.exit()
def check_keyup_events(event, ship):
if event.key == pygame.K_RIGHT:
ship.moving_right = False
elif event.key == pygame.K_LEFT:
ship.moving_left = False
def fire_bullet(ai_settings, screen, ship, bullets):
if len(bullets) < ai_settings.bullets_allowed:
new_bullet = Bullet(ai_settings, screen, ship)
ship.fire_weapon()
bullets.add(new_bullet)
def fire_random_beam(ai_settings, screen, aliens, beams):
firing_alien = random.choice(aliens.sprites())
if len(beams) < ai_settings.beams_allowed and \
(ai_settings.beam_stamp is None or
(abs(pygame.time.get_ticks() - ai_settings.beam_stamp) > ai_settings.beam_time)):
new_beam = Beam(ai_settings, screen, firing_alien)
firing_alien.fire_weapon()
beams.add(new_beam)
def alien_collision_check(bullet, alien):
if alien.dead:
return False
return pygame.sprite.collide_rect(bullet, alien)
def check_alien_bullet_collisions(ai_settings, screen, stats, sb, ship, aliens, beams, bullets, ufo):
collisions = pygame.sprite.groupcollide(bullets, aliens, True, False, collided=alien_collision_check)
if collisions:
for aliens_hit in collisions.values():
for a in aliens_hit:
stats.score += ai_settings.alien_points[str(a.alien_type)]
a.begin_death()
sb.prep_score()
check_high_score(stats, sb)
ufo_collide = pygame.sprite.groupcollide(bullets, ufo, True, False, collided=alien_collision_check)
if ufo_collide:
for ufo in ufo_collide.values():
for u in ufo:
stats.score += u.score
u.begin_death()
sb.prep_score()
check_high_score(stats, sb)
if len(aliens) == 0:
if ufo:
for u in ufo.sprites():
u.kill()
beams.empty()
bullets.empty()
stats.level += 1
level_intro(ai_settings, screen, stats)
ai_settings.increase_base_speed()
ai_settings.reset_alien_speed()
sb.prep_level()
create_fleet(ai_settings, screen, ship, aliens)
stats.next_speedup = len(aliens) - (len(aliens) // 5)
stats.aliens_left = len(aliens)
if stats.aliens_left <= stats.next_speedup and ai_settings.alien_speed_factor < ai_settings.alien_speed_limit:
ai_settings.increase_alien_speed()
stats.next_speedup = stats.aliens_left - (stats.aliens_left // 5)
def check_ship_beam_collisions(ai_settings, screen, stats, sb, ship, aliens, beams, bullets, ufo):
collide = pygame.sprite.spritecollideany(ship, beams)
if collide:
ship_hit(ai_settings, screen, stats, sb, ship, aliens, beams, bullets, ufo)
def check_bunker_collisions(beams, bullets, bunkers):
collisions = pygame.sprite.groupcollide(bullets, bunkers, True, False)
for b_list in collisions.values():
for block in b_list:
block.damage(top=False)
collisions = pygame.sprite.groupcollide(beams, bunkers, True, False)
for b_list in collisions.values():
for block in b_list:
block.damage(top=True)
def update_bullets_beams(ai_settings, screen, stats, sb, ship, aliens, beams, bullets, ufo):
bullets.update()
beams.update()
for bullet in bullets.copy():
if bullet.rect.bottom <= 0:
bullets.remove(bullet)
for beam in beams.copy():
if beam.rect.bottom > ai_settings.screen_height:
beams.remove(beam)
check_alien_bullet_collisions(ai_settings, screen, stats, sb, ship, aliens, beams, bullets, ufo)
check_ship_beam_collisions(ai_settings, screen, stats, sb, ship, aliens, beams, bullets, ufo)
def check_high_score(stats, sb):
if stats.score > stats.high_score:
stats.high_score = stats.score
sb.prep_high_score()
def update_screen(ai_settings, screen, stats, sb, ship, aliens, beams, bullets, bunkers, stars, ufo_group):
if stats.game_active:
ufo_event_check(ai_settings, screen, ufo_group)
screen.fill(ai_settings.bg_color)
stars.update()
stars.draw(screen)
for bullet in bullets.sprites():
bullet.draw_bullet()
for beam in beams.sprites():
beam.blitme()
if ufo_group:
ufo_group.update()
for ufo in ufo_group.sprites():
ufo.blitme()
aliens.draw(screen)
check_bunker_collisions(beams, bullets, bunkers)
sb.show_score()
ship.blitme()
bunkers.update()
pygame.display.flip()
def get_number_aliens(ai_settings, alien_width):
available_space_x = ai_settings.screen_width - 2 * alien_width
number_aliens_x = int(available_space_x / (2.5 * alien_width))
return number_aliens_x
def get_number_rows(ai_settings, ship_height, alien_height):
available_space_y = (ai_settings.screen_height - (4 * alien_height) - ship_height)
number_rows = int(available_space_y / (2.5 * alien_height))
return number_rows
def ship_hit(ai_settings, screen, stats, sb, ship, aliens, bullets, beams, ufo):
if ufo:
for u in ufo.sprites():
u.kill()
ship.death()
ship.update()
while ship.dead:
screen.fill(ai_settings.bg_color)
ship.blitme()
pygame.display.flip()
ship.update()
if stats.ships_left > 0:
stats.ships_left -= 1
aliens.empty()
bullets.empty()
beams.empty()
ai_settings.reset_alien_speed()
create_fleet(ai_settings, screen, ship, aliens)
stats.next_speedup = len(aliens) - (len(aliens) // 5)
stats.aliens_left = len(aliens.sprites())
ship.center_ship()
sb.prep_ships()
else:
ai_settings.stop_bgm()
pygame.mixer.music.load('sound/game-end.wav')
pygame.mixer.music.play()
stats.game_active = False
stats.save_high_score()
pygame.mouse.set_visible(True)
def check_aliens_bottom(ai_settings, screen, stats, sb, ship, aliens, beams, bullets, ufo):
screen_rect = screen.get_rect()
for alien in aliens.sprites():
if alien.rect.bottom >= screen_rect.bottom:
ship_hit(ai_settings, screen, stats, sb, ship, aliens, beams, bullets, ufo)
break
def update_aliens(ai_settings, screen, stats, sb, ship, aliens, beams, bullets, ufo):
check_fleet_edges(ai_settings, aliens)
aliens.update()
if pygame.sprite.spritecollideany(ship, aliens):
ship_hit(ai_settings, screen, stats, sb, ship, aliens, beams, bullets, ufo)
check_aliens_bottom(ai_settings, screen, stats, sb, ship, aliens, beams, bullets, ufo)
if aliens.sprites():
fire_random_beam(ai_settings, screen, aliens, beams)
def create_alien(ai_settings, screen, aliens, alien_number, row_number):
if row_number < 2:
alien_type = 1
elif row_number < 4:
alien_type = 2
else:
alien_type = 3
alien = Alien(ai_settings, screen, alien_type)
alien_width = alien.rect.width
alien.x = alien_width + 1.25 * alien_width * alien_number
alien.rect.x = alien.x
alien.rect.y = alien.rect.height + 1.25 * alien.rect.height * row_number
alien.rect.y += int(ai_settings.screen_height / 8)
aliens.add(alien)
def create_fleet(ai_settings, screen, ship, aliens):
alien = Alien(ai_settings, screen)
number_aliens_x = get_number_aliens(ai_settings, alien.rect.width)
number_rows = get_number_rows(ai_settings, ship.rect.height, alien.rect.height)
for row_number in range(number_rows):
for alien_number in range(number_aliens_x):
create_alien(ai_settings, screen, aliens, alien_number, row_number)
def change_fleet_direction(ai_settings, aliens):
for alien in aliens.sprites():
alien.rect.y += ai_settings.fleet_drop_speed
ai_settings.fleet_direction *= -1
def check_fleet_edges(ai_settings, aliens):
for alien in aliens.sprites():
if alien.check_edges():
change_fleet_direction(ai_settings, aliens)
break
def create_random_ufo(ai_settings, screen):
ufo = None
if random.randrange(0, 100) <= 15:
ufo = Ufo(ai_settings, screen)
time_stamp = pygame.time.get_ticks()
return time_stamp, ufo
def ufo_event_check(ai_settings, screen, ufo_group):
if not ai_settings.last_ufo and not ufo_group:
ai_settings.last_ufo, n_ufo = create_random_ufo(ai_settings, screen)
if n_ufo:
ufo_group.add(n_ufo)
elif abs(pygame.time.get_ticks() - ai_settings.last_ufo) > ai_settings.ufo_min_interval and not ufo_group:
ai_settings.last_ufo, n_ufo = create_random_ufo(ai_settings, screen)
if n_ufo:
ufo_group.add(n_ufo)
def create_stars(ai_settings, screen):
stars = pygame.sprite.Group()
for i in range(ai_settings.stars_limit):
new_star = Star(ai_settings, screen)
stars.add(new_star)
return stars
def high_score_screen(ai_settings, game_stats, screen):
hs_screen = HighScoreScreen(ai_settings, screen, game_stats)
back_button = Button(ai_settings, screen, 'Back To Menu', y_factor=0.85)
while True:
back_button.alter_text_color(*pygame.mouse.get_pos())
for event in pygame.event.get():
if event.type == pygame.QUIT:
return False
elif event.type == pygame.MOUSEBUTTONDOWN:
if back_button.check_button(*pygame.mouse.get_pos()):
return True
screen.fill(ai_settings.bg_color)
hs_screen.show_scores()
back_button.draw_button()
pygame.display.flip()
def startup_screen(ai_settings, game_stats, screen):
menu = Intro(ai_settings, game_stats, screen)
play_button = Button(ai_settings, screen, 'Play Game', y_factor=0.70)
hs_button = Button(ai_settings, screen, 'High Scores', y_factor=0.80)
intro = True
while intro:
play_button.alter_text_color(*pygame.mouse.get_pos())
hs_button.alter_text_color(*pygame.mouse.get_pos())
for event in pygame.event.get():
if event.type == pygame.QUIT:
return False
elif event.type == pygame.MOUSEBUTTONDOWN:
click_x, click_y = pygame.mouse.get_pos()
game_stats.game_active = play_button.check_button(click_x, click_y)
intro = not game_stats.game_active
if hs_button.check_button(click_x, click_y):
ret_hs = high_score_screen(ai_settings, game_stats, screen)
if not ret_hs:
return False
screen.fill(ai_settings.bg_color)
menu.show_menu()
hs_button.draw_button()
play_button.draw_button()
pygame.display.flip()
return True
def play_bgm(ai_settings, stats):
if stats.game_active:
ai_settings.continue_bgm()