Session 9: Cheatsheet

boss_rect.x += boss_speed
if boss_rect.right >= WIDTH or boss_rect.left <= 0:
    boss_speed = -boss_speed  # reverse direction

BOSS_MAX_HP = 100

# Background
pygame.draw.rect(screen, (80, 0, 0), (10, 10, 300, 20))
# Filled part
breedte = max(0, int(300 * boss_hp / BOSS_MAX_HP))
pygame.draw.rect(screen, RED, (10, 10, breedte, 20))

for b in player_bullets[:]:
    b.y -= 8
    if b.colliderect(boss_rect):
        player_bullets.remove(b)
        boss_hp -= 1

boss_shoot_timer += 1
if boss_shoot_timer >= boss_shoot_interval:
    boss_shoot_timer = 0
    boss_bullets.append(
        pygame.Rect(boss_rect.centerx - 4, boss_rect.bottom, 8, 16)
    )

if boss_hp > 50:
    boss_phase = 1
    boss_speed_abs = 3
    boss_shoot_interval = 60
elif boss_hp > 25:
    boss_phase = 2
    boss_speed_abs = 5
    boss_shoot_interval = 35
else:
    boss_phase = 3
    boss_speed_abs = 7
    boss_shoot_interval = 20

# Keep the direction:
boss_speed = boss_speed_abs * (1 if boss_speed > 0 else -1)

screen.fill((0, 0, 0))
win = font.render("BOSS DEFEATED!", True, YELLOW)
screen.blit(win, (WIDTH // 2 - win.get_width() // 2, HEIGHT // 2))
pygame.display.flip()
pygame.time.wait(3000)

for i in range(player_lives):
    pygame.draw.circle(screen, RED, (WIDTH - 20 - i * 30, 20), 10)