Hati untuk Nyawa

Termasuk bagian Aturan Game dalam perjalanan Pygame di Coddy. Pelajaran 8 dari 29.

Sekarang game memiliki tiga nyawa, ditampilkan sebagai Lives: 3 di bagian bawah. Pemain lebih cepat membaca sederet hati daripada sebuah angka. Paket aset berisi heart.png dan heart_empty.png, keduanya berukuran 36 kali 36.

Muat setiap gambar sekali, setelah set_mode:

heart = pygame.image.load("assets/images/heart.png").convert_alpha()
heart_empty = pygame.image.load("assets/images/heart_empty.png").convert_alpha()

Lalu gambar tiga slot dengan perulangan for. Slot i terisi selama i kurang dari jumlah nyawa yang tersisa:

for i in range(3):
    if i < lives:
        screen.blit(heart, (10 + i * 40, 10))
    else:
        screen.blit(heart_empty, (10 + i * 40, 10))

Dengan 2 nyawa, slot 0 dan 1 terisi, sedangkan slot 2 kosong. Hati kosong menjaga panjang baris tetap sama, sehingga pemain tahu berapa banyak nyawa yang dimiliki game pada awalnya, bukan hanya berapa yang tersisa.

Tantangan

Sedang

Muat assets/images/heart.png dan assets/images/heart_empty.png sekali, setelah set_mode.
Di draw_game(), gambar tiga hati pada x 10, 50, dan 90, y 10: penuh untuk setiap nyawa yang tersisa, kosong untuk setiap nyawa yang hilang.
Hapus teks Lives:.

Coba sendiri

import random
import pygame

pygame.init()
screen = pygame.display.set_mode((480, 360))
pygame.display.set_caption("Meteor Dodge")
clock = pygame.time.Clock()
font = pygame.font.Font("assets/fonts/pixel.ttf", 24)
big_font = pygame.font.Font("assets/fonts/pixel.ttf", 48)
WHITE = (240, 240, 240)
PLATE = (60, 60, 90)


def reset():
    global player, rock, score, lives
    player = pygame.Rect(220, 300, 40, 40)
    rock = pygame.Rect(random.randint(0, 456), -24, 24, 24)
    score = 0
    lives = 3


def draw_menu():
    screen.fill((30, 30, 46))
    title = big_font.render("Meteor Dodge", True, WHITE)
    title_rect = title.get_rect(center=(240, 140))
    pygame.draw.rect(screen, PLATE, title_rect.inflate(24, 12))
    screen.blit(title, title_rect)
    hint = font.render("Press Enter to play", True, WHITE)
    screen.blit(hint, hint.get_rect(center=(240, 200)))


def draw_game():
    screen.fill((30, 30, 46))
    pygame.draw.rect(screen, (255, 196, 0), player)
    pygame.draw.rect(screen, (235, 80, 80), rock)
    score_text = font.render(f"Score: {score}", True, WHITE)
    score_rect = score_text.get_rect(topright=(470, 10))
    pygame.draw.rect(screen, PLATE, score_rect.inflate(12, 8))
    screen.blit(score_text, score_rect)
    lives_text = font.render(f"Lives: {lives}", True, WHITE)
    screen.blit(lives_text, (10, 330))


def play_frame():
    global score, lives, state
    keys = pygame.key.get_pressed()
    if keys[pygame.K_LEFT]:
        player.x -= 6
    if keys[pygame.K_RIGHT]:
        player.x += 6
    player.clamp_ip(screen.get_rect())

    rock.y += 4
    if rock.top > 360:
        rock.y = -24
        rock.x = random.randint(0, 456)
        score += 1
    if rock.colliderect(player):
        rock.y = -24
        rock.x = random.randint(0, 456)
        lives -= 1
        if lives == 0:
            state = "over"
    draw_game()


def draw_over():
    draw_game()
    message = big_font.render("Game over", True, WHITE)
    screen.blit(message, message.get_rect(center=(240, 160)))
    hint = font.render("Press R to play again", True, WHITE)
    screen.blit(hint, hint.get_rect(center=(240, 200)))


reset()
state = "menu"

running = True
while running:
    for event in pygame.event.get():
        if event.type == pygame.QUIT:
            running = False
        if event.type == pygame.KEYDOWN:
            if event.key == pygame.K_RETURN and state == "menu":
                state = "play"
            elif event.key == pygame.K_r and state == "over":
                reset()
                state = "play"

    if state == "menu":
        draw_menu()
    elif state == "play":
        play_frame()
    else:
        draw_over()
    pygame.display.flip()
    clock.tick(60)

pygame.quit()