Python 2.7 重力与矩形游戏

我真的有一个基本的问题，需要很长时间。有人能教我怎么做直跳吗？我只需要一个矩形的示例。

我看到了你的问题，我想我已经为你做了一些示例代码，但首先我想告诉你它是如何工作的。除了在Y轴上存储位置的Y变量外，还需要一个名为velocityY的变量。对于游戏中的每一帧，Y变量都会用velocityY更改，如下所示：

while True:
    y += velocityY # <----- Here
    manage_window()
    for event in pygame.event.get():
          handle_event(event)
    pygame.display.flip()

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我想艾尔·斯维加特（Al Sweigart）的书中也提到了这一点。我能要一个准确的页面吗？

gravity

是你一直添加到位置上的值，只有与背景碰撞才能阻止你摔倒。请参见第页的“你创建

rect

和groundRect`两次”。您可以在

的同时在
中再次删除。我一直得到这样一个事实，即有很多空参数。我应该把什么作为论点？
import pygame

pygame.init()

window = pygame.display.set_mode((800, 600))

x, y = 300, 400
xVelocity, yVelocity = 0, 0
rect = pygame.Rect(x, y, 200, 200)
groundRect = pygame.Rect(0, 500, 800, 100)

clock = pygame.time.Clock()

white = 255, 255, 255
red = 255, 0, 0
black = 0, 0, 0
blue = 0, 0, 255

while True:
    clock.tick(60) # Make sure the game is running at 60 FPS
    rect = pygame.Rect(x, y, 200, 200) # Updating our rect to match coordinates
    groundRect = pygame.Rect(0, 500, 800, 100) # Creating ground rect

    # HERE IS WHAT YOU CARE ABOUT #
    yVelocity += 0.2 # Gravity is pulling the rect down
    x += xVelocity # Here we update our velocity on the X axis
    y += yVelocity # Here we update our velocity on the Y axis
    # HERE IS WHAT YOU CARE ABOUT #

    if groundRect.colliderect(rect): # Check if the rect is colliding with the ground
        y = groundRect.top-rect.height
        yVelocity = 0
    window.fill(white)
    pygame.draw.rect(window, red, rect) # Here we draw the rect
    pygame.draw.rect(window, black, rect, 5) # Here we draw the black box around the rect
    pygame.draw.rect(window, blue, groundRect) # Here we draw the ground
    pygame.draw.rect(window, black, groundRect, 5) # Here we draw the black box around the rect
    for event in pygame.event.get(): # Getting events
        if event.type == pygame.QUIT: # If someone presses X on the window, then we want to quit
            pygame.quit()
            quit()
        if event.type == pygame.KEYDOWN:
            if event.key == pygame.K_SPACE: # Pressing space will make the cube jump
                if y >= 300: # Checking if cube is on the ground and not in the air
                    yVelocity = -10 # Setting velocity to upwards
    pygame.display.flip() # Updating the screen