我对 pygame 了解不多,所以我只是在 pygame.org 上复制了一个教程,精灵只是循环地上下旋转。
import sys, pygame
pygame.init()
size = width, height = 500, 500
speed = [2, 2]
blue = 85, 118, 250
screen = pygame.display.set_mode(size)
bird = pygame.image.load("bird-sprite.png")
birdrect = bird.get_rect()
while True:
for event in pygame.event.get():
if event.type == pygame.QUIT: sys.exit()
birdrect = birdrect.move(speed)
if birdrect.left < 0 or birdrect.right > width:
speed[0] = -speed[0]
if birdrect.top < 0 or birdrect.bottom > height:
speed[1] = -speed[1]
screen.fill(blue)
screen.blit(bird, birdrect)
pygame.display.flip()
我试图为精灵创建运动,但精灵只是在整个窗口周围移动而没有在无限循环中停止。
我使用了 pygame.org,因为我找不到关于运动的确切教程,所以是的。
我不太了解 Python,所以我不知道我做错了什么。
嗯,它完全按照代码告诉它做的 - 每帧将鸟移动 2 个像素(
speed
变量):
# This line of code moves bird sprite every frame by 2 pixels
birdrect = birdrect.move(speed)
# This lines of code checks if bird sprite is outside of the screen
# If it is - then speed inverts, so bird starts moving in the opposite way
if birdrect.left < 0 or birdrect.right > width:
speed[0] = -speed[0]
if birdrect.top < 0 or birdrect.bottom > height:
speed[1] = -speed[1]
如果你想实现移动,你真的应该阅读一堆关于 pygame 的教程。
这是我简单的移动实现(鸟类使用方向键移动):
import sys, pygame
pygame.init()
size = width, height = 500, 500
speed = [0.1, 0.1]
blue = 85, 118, 250
screen = pygame.display.set_mode(size)
clock = pygame.time.Clock()
bird = pygame.image.load("bird-sprite.png")
birdrect = bird.get_rect()
# Coordinates of bird
bird_x, bird_y = birdrect.x, birdrect.y
# Speed of bird in px/second
speed = 200
while True:
for event in pygame.event.get():
if event.type == pygame.QUIT: sys.exit()
# Calculate how many milliseconds passed since previous frames
# This is necessary for smooth movement
time_passed = clock.tick(60) / 1000
# Get pressed keys state
pressed_keys = pygame.key.get_pressed()
# If LEFT is pressed - subtract speed*time_passed from bird`s X coordinate
# this means that when you press LEFT for 1 second - bird will move 200 pixels left
# Do same calculations for every key
if pressed_keys[pygame.K_LEFT]:
bird_x -= speed * time_passed
if pressed_keys[pygame.K_RIGHT]:
bird_x += speed * time_passed
if pressed_keys[pygame.K_DOWN]:
bird_y += speed * time_passed
if pressed_keys[pygame.K_UP]:
bird_y -= speed * time_passed
# Apply changes to bird's rect
birdrect.x = int(bird_x)
birdrect.y = int(bird_y)
# Draw everyting
screen.fill(blue)
screen.blit(bird, birdrect)
# Update display
pygame.display.flip()