英文:
Sprite in Pygame moving up and down in a endless loop
问题
不了解pygame，所以我只是复制了pygame.org上的教程，精灵只是在一个循环中上下旋转。
import sys, pygamepygame.init()size = width, height = 500, 500speed = [2, 2]blue = 85, 118, 250screen = 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()
我尝试为精灵创建移动，但精灵只是在整个窗口中不停地移动，形成一个无限循环。
我使用了pygame.org，因为我找不到精确的移动教程，所以是的。
我不太了解Python，所以不知道我做错了什么。
英文:
I don't know much about pygame so I just copied a tutorial on pygame.org and the sprite just spins up and down in a loop.
import sys, pygamepygame.init()size = width, height = 500, 500speed = [2, 2]blue = 85, 118, 250screen = 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()
I tried to create movement for a sprite but instead the sprite just moves around the entire window without stopping in a endless loop.
I used pygame.org because I couldn't find a exact tutorial on movement so yeah.
I don't know much Python so I don't know what I did wrong.
答案1
得分: 0
以下是代码部分的中文翻译：
# 这行代码按照每帧2个像素的速度移动鸟的精灵birdrect = birdrect.move(speed)# 这些代码检查鸟的精灵是否超出屏幕# 如果是的话，速度会反转，所以鸟会开始朝相反的方向移动if birdrect.left < 0 or birdrect.right > width:speed[0] = -speed[0]if birdrect.top < 0 or birdrect.bottom > height:speed[1] = -speed[1]
这是使用箭头键实现鸟移动的简单代码实现：
import sys, pygamepygame.init()size = width, height = 500, 500speed = [0.1, 0.1]blue = 85, 118, 250screen = pygame.display.set_mode(size)clock = pygame.time.Clock()bird = pygame.image.load("bird-sprite.png")birdrect = bird.get_rect()# 鸟的坐标bird_x, bird_y = birdrect.x, birdrect.y# 鸟的速度，以像素/秒为单位speed = 200while True:for event in pygame.event.get():if event.type == pygame.QUIT: sys.exit()# 计算自上一帧以来经过的毫秒数# 这对于平滑的移动是必要的time_passed = clock.tick(60) / 1000# 获取按键状态pressed_keys = pygame.key.get_pressed()# 如果按下左箭头键 - 从鸟的X坐标中减去速度*time_passed# 这意味着当你按下左箭头键1秒钟时，鸟会向左移动200像素# 对于每个键都进行相同的计算if pressed_keys[pygame.K_LEFT]:bird_x -= speed * time_passedif pressed_keys[pygame.K_RIGHT]:bird_x += speed * time_passedif pressed_keys[pygame.K_DOWN]:bird_y += speed * time_passedif pressed_keys[pygame.K_UP]:bird_y -= speed * time_passed# 将更改应用到鸟的rectbirdrect.x = int(bird_x)birdrect.y = int(bird_y)# 绘制所有内容screen.fill(blue)screen.blit(bird, birdrect)# 更新显示pygame.display.flip()
希望这些翻译对你有帮助。
英文:
Well, it does exactly what code tells it to do - move bird every frame by 2 pixels (speed variable):
# This line of code moves bird sprite every frame by 2 pixelsbirdrect = 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 wayif birdrect.left < 0 or birdrect.right > width:speed[0] = -speed[0]if birdrect.top < 0 or birdrect.bottom > height:speed[1] = -speed[1]
If you want to implement movement, you should really read a bunch of tutorials about pygame.
Here is my simple implementation of movement (birds moves using arrow keys):
import sys, pygamepygame.init()size = width, height = 500, 500speed = [0.1, 0.1]blue = 85, 118, 250screen = pygame.display.set_mode(size)clock = pygame.time.Clock()bird = pygame.image.load("bird-sprite.png")birdrect = bird.get_rect()# Coordinates of birdbird_x, bird_y = birdrect.x, birdrect.y# Speed of bird in px/secondspeed = 200while 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 movementtime_passed = clock.tick(60) / 1000# Get pressed keys statepressed_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 keyif pressed_keys[pygame.K_LEFT]:bird_x -= speed * time_passedif pressed_keys[pygame.K_RIGHT]:bird_x += speed * time_passedif pressed_keys[pygame.K_DOWN]:bird_y += speed * time_passedif pressed_keys[pygame.K_UP]:bird_y -= speed * time_passed# Apply changes to bird's rectbirdrect.x = int(bird_x)birdrect.y = int(bird_y)# Draw everytingscreen.fill(blue)screen.blit(bird, birdrect)# Update displaypygame.display.flip()
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