Question

我希望黑色矩形在一个循环中上下移动，但是我不知道该怎么做。我曾尝试过，但我在MovingRect类上遇到问题。

这是整个代码：

import pygame
import sys


pygame.init()
pygame.display.set_caption("My Game")
screen = pygame.display.set_mode((1200, 600))
clock = pygame.time.Clock()
BLUE = pygame.Color('dodgerblue3')
ORANGE = pygame.Color('sienna3')
BLACK = (0, 0, 0)
WHITE = (255,255,255)
RED = (255, 0, 0)
GREEN = (13, 255, 0)
YELLOW = (0, 255, 20)
BRIGHT_YELLOW = (255, 255, 20)

class MovingRect(pygame.Rect):

    def __init__(self, x, y, w, h, vel):
        # Calling the __init__ method of the parent class
        super().__init__(x, y, w, h)
        self.vel = vel

    def update(self):
        self.x += self.vel  # Moving
        if self.right > 600 or self.left < 320:  # If it's not in this area
            self.vel = -self.vel  # Inverting the direction

    def update2(self):
        self.x += self.vel
        if self.right > 1180 or self.left < 620:
            self.vel = -self.vel

    def update3(self):
        self.y += self.vel
        if self.top > 20 or self.bottom < 400:
            self.vel = -self.vel


def quit_game():
    pygame.quit()
    sys.exit()

def text_objects(text, font):
    textSurface = font.render(text, True, BLACK)
    return textSurface, textSurface.get_rect()

def button(msg, x, y, w, h, ic, ac, action = None):
    mouse = pygame.mouse.get_pos()
    click = pygame.mouse.get_pressed()


    if x + w > mouse[0] > x and y + h  > mouse[1] > y:
        pygame.draw.rect(screen, ac, (x, y, w, h))
        if click[0] == 1 and action is not None:
            action()
    else:
        pygame.draw.rect(screen, ic, (x, y, w, h))

    smallText = pygame.font.Font("freesansbold.ttf",50)
    textSurf, textRect = text_objects(msg, smallText)
    textRect.center = ((x+(w/2)), (y+(h/2)))
    screen.blit(textSurf, textRect)

def restart():
    while True:
        for event in pygame.event.get():
            if event.type == pygame.QUIT:
                quit_game()

        screen.fill(BLUE)

        button("Restart", 525, 250, 150, 60, BRIGHT_YELLOW, YELLOW, menu)
        button("Quit", 525, 350, 150, 60, BRIGHT_YELLOW, YELLOW, quit_game)

        pygame.display.update()
        pygame.display.flip()
        clock.tick(60)

def front_page():
    while True:
        for event in pygame.event.get():
            if event.type == pygame.QUIT:
                quit_game()

        screen.fill(WHITE)

        button("Start", 525, 250, 150, 60, BRIGHT_YELLOW, YELLOW, menu)
        button("Quit", 525, 350, 150, 60, BRIGHT_YELLOW, YELLOW, quit_game)

        pygame.display.update()
        pygame.display.flip()
        clock.tick(60)


def menu():
    vel = 4
    vel_left = 5
    vel_right = -5

    player = pygame.Rect(40, 45, 30, 30)

    walls = [
        pygame.Rect(0, 0, 1200, 20), pygame.Rect(0, 0, 20, 600),
        pygame.Rect(0, 580, 1200, 20), pygame.Rect(1180, 0, 20, 600),
        pygame.Rect(300, 0, 20, 530), pygame.Rect(20, 100, 230, 20),
        pygame.Rect(70, 200, 230, 20), pygame.Rect(20, 300, 230, 20),
        pygame.Rect(70, 400, 230, 20), pygame.Rect(600, 100, 20, 500)
    ]

    movingrects = [
        MovingRect(320, 120, 30, 30, vel_left),
        MovingRect(320, 240, 30, 30, vel_left),
        MovingRect(320, 360, 30, 30, vel_left),
        MovingRect(570, 180, 30, 30, vel_right),
        MovingRect(570, 300, 30, 30, vel_right),
        MovingRect(570, 420, 30, 30, vel_right)
    ]

    movingrects2 = [
        MovingRect(1140, 120, 30, 30, vel_left),
        MovingRect(1140, 240, 30, 30, vel_left),
        MovingRect(1140, 360, 30, 30, vel_left),
        MovingRect(620, 180, 30, 30, vel_right),
        MovingRect(620, 300, 30, 30, vel_right),
        MovingRect(620, 420, 30, 30, vel_right),
    ]

    movingrects3 = [
        MovingRect(700, 20, 30, 30, vel_left),
        MovingRect(820, 20, 30, 30, vel_left),
        MovingRect(940, 450, 30, 30, vel_right),
        MovingRect(1060, 450, 30, 30, vel_right)
    ]

    while True:
        for event in pygame.event.get():
            if event.type == pygame.QUIT:
                quit_game()

        keys = pygame.key.get_pressed()

        # Player coordinates
        if keys[pygame.K_LEFT] and player.x > 0:
            player.x -= vel
        if keys[pygame.K_RIGHT] and player.x < 1200 - player.width:
            player.x += vel
        if keys[pygame.K_UP] and player.y > 0:
            player.y -= vel
        if keys[pygame.K_DOWN] and player.y < 600 - player.height:
            player.y += vel

        for wall in walls:
            # Check if the player rectangle collides with a wall rectangle
            if player.colliderect(wall):
                print("Game over")
                pygame.time.wait(1000)
                restart()

        for movingrect in movingrects:
            movingrect.update()  # Movement and bounds checking
            if player.colliderect(movingrect):
                print("Game over")

        # TO DO #
        for movingrect2 in movingrects2:
            movingrect2.update2()
            if player.colliderect(movingrect2):
                print("Game over")

        for movingrect3 in movingrects3:
            movingrect3.update2()
            if player.colliderect(movingrect3):
                print("Game over")

        # Drawing everything
        screen.fill(WHITE)
        pygame.draw.rect(screen, RED, player)

        for wall in walls:
            pygame.draw.rect(screen, BLACK, wall)

        for movingrect in movingrects:
            pygame.draw.rect(screen, GREEN, movingrect)

        for movingrect2 in movingrects2:
            pygame.draw.rect(screen, GREEN, movingrect2)

        for movingrect3 in movingrects3:
            pygame.draw.rect(screen, BLACK, movingrect3)


        pygame.draw.rect(screen, RED, player)
        pygame.display.update()

        pygame.display.flip()
        clock.tick(60)


def main():
    scene = front_page  # Set the current scene.
    while scene is not None:
        # Execute the current scene function. When it's done
        # it returns either the next scene or None which we
        # assign to the scene variable.
        scene = scene()


main()
pygame.quit()

这里是移动矩形的类，黑色矩形位于update3函数中

class MovingRect(pygame.Rect):

def __init__(self, x, y, w, h, vel):
    # Calling the __init__ method of the parent class
    super().__init__(x, y, w, h)
    self.vel = vel

def update(self):
    self.x += self.vel  # Moving
    if self.right > 600 or self.left < 320:  # If it's not in this area
        self.vel = -self.vel  # Inverting the direction

def update2(self):
    self.x += self.vel
    if self.right > 1180 or self.left < 620:
        self.vel = -self.vel

def update3(self):
    self.y += self.vel
    if self.top > 20 or self.bottom < 400:
        self.vel = -self.vel

在这里，当我调用该类时，我遇到了问题，当我写vel.bottom或vel.top时为什么我不知道为什么它不起作用，但是如果我写vel.right或vel.left的话有效

    movingrects3 = [
    MovingRect(700, 20, 30, 30, vel_left),
    MovingRect(820, 20, 30, 30, vel_left),
    MovingRect(940, 450, 30, 30, vel_right),
    MovingRect(1060, 450, 30, 30, vel_right)
]

Answer 1

代码的主要问题是，对于MovingRectangle中的所有movingrects3，您都是使用update2方法而不是update3方法更新它们的。 update2方法仅增加x的值，该值将水平移动矩形，而不是垂直移动矩形。但是，update3方法的确会增加y的值，这将使矩形垂直移动。

要解决此问题：

首先，我当然将movingrect3.update2()行更改为movingrect3.update3()。
然后，我在脚本顶部创建了screen_width和screen_height变量，我们可以在update3方法中将其用于冲突检测。
最后，我更改了碰撞检测代码，以使矩形从底壁和顶壁碰撞。为此，我检查了self.top是否小于 20（墙壁的高度），或者self.bottom是否小于 screen_height减20。请记住，点（0，0）在pygame中位于左上角。

这是固定代码：

import pygame
import sys


pygame.init()
pygame.display.set_caption("My Game")
screen_width, screen_height = 1200, 600
screen = pygame.display.set_mode((screen_width, screen_height))
clock = pygame.time.Clock()
BLUE = pygame.Color('dodgerblue3')
ORANGE = pygame.Color('sienna3')
BLACK = (0, 0, 0)
WHITE = (255,255,255)
RED = (255, 0, 0)
GREEN = (13, 255, 0)
YELLOW = (0, 255, 20)
BRIGHT_YELLOW = (255, 255, 20)

class MovingRect(pygame.Rect):

    def __init__(self, x, y, w, h, vel):
        # Calling the __init__ method of the parent class
        super().__init__(x, y, w, h)
        self.vel = vel

    def update(self):
        self.x += self.vel  # Moving
        if self.right > 600 or self.left < 320:  # If it's not in this area
            self.vel = -self.vel  # Inverting the direction

    def update2(self):
        self.x += self.vel
        if self.right > 1180 or self.left < 620:
            self.vel = -self.vel

    def update3(self):
        self.y += self.vel
        if self.top < 20 or self.bottom > screen_height-20:
            self.vel = -self.vel


def quit_game():
    pygame.quit()
    sys.exit()

def text_objects(text, font):
    textSurface = font.render(text, True, BLACK)
    return textSurface, textSurface.get_rect()

def button(msg, x, y, w, h, ic, ac, action = None):
    mouse = pygame.mouse.get_pos()
    click = pygame.mouse.get_pressed()


    if x + w > mouse[0] > x and y + h  > mouse[1] > y:
        pygame.draw.rect(screen, ac, (x, y, w, h))
        if click[0] == 1 and action is not None:
            action()
    else:
        pygame.draw.rect(screen, ic, (x, y, w, h))

    smallText = pygame.font.Font("freesansbold.ttf",50)
    textSurf, textRect = text_objects(msg, smallText)
    textRect.center = ((x+(w/2)), (y+(h/2)))
    screen.blit(textSurf, textRect)

def restart():
    while True:
        for event in pygame.event.get():
            if event.type == pygame.QUIT:
                quit_game()

        screen.fill(BLUE)

        button("Restart", 525, 250, 150, 60, BRIGHT_YELLOW, YELLOW, menu)
        button("Quit", 525, 350, 150, 60, BRIGHT_YELLOW, YELLOW, quit_game)

        pygame.display.update()
        pygame.display.flip()
        clock.tick(60)

def front_page():
    while True:
        for event in pygame.event.get():
            if event.type == pygame.QUIT:
                quit_game()

        screen.fill(WHITE)

        button("Start", 525, 250, 150, 60, BRIGHT_YELLOW, YELLOW, menu)
        button("Quit", 525, 350, 150, 60, BRIGHT_YELLOW, YELLOW, quit_game)

        pygame.display.update()
        pygame.display.flip()
        clock.tick(60)


def menu():
    vel = 4
    vel_left = 5
    vel_right = -5

    player = pygame.Rect(40, 45, 30, 30)

    walls = [
        pygame.Rect(0, 0, 1200, 20), pygame.Rect(0, 0, 20, 600),
        pygame.Rect(0, 580, 1200, 20), pygame.Rect(1180, 0, 20, 600),
        pygame.Rect(300, 0, 20, 530), pygame.Rect(20, 100, 230, 20),
        pygame.Rect(70, 200, 230, 20), pygame.Rect(20, 300, 230, 20),
        pygame.Rect(70, 400, 230, 20), pygame.Rect(600, 100, 20, 500)
    ]

    movingrects = [
        MovingRect(320, 120, 30, 30, vel_left),
        MovingRect(320, 240, 30, 30, vel_left),
        MovingRect(320, 360, 30, 30, vel_left),
        MovingRect(570, 180, 30, 30, vel_right),
        MovingRect(570, 300, 30, 30, vel_right),
        MovingRect(570, 420, 30, 30, vel_right)
    ]

    movingrects2 = [
        MovingRect(1140, 120, 30, 30, vel_left),
        MovingRect(1140, 240, 30, 30, vel_left),
        MovingRect(1140, 360, 30, 30, vel_left),
        MovingRect(620, 180, 30, 30, vel_right),
        MovingRect(620, 300, 30, 30, vel_right),
        MovingRect(620, 420, 30, 30, vel_right),
    ]

    movingrects3 = [
        MovingRect(700, 20, 30, 30, vel_left),
        MovingRect(820, 20, 30, 30, vel_left),
        MovingRect(940, 450, 30, 30, vel_right),
        MovingRect(1060, 450, 30, 30, vel_right)
    ]

    while True:
        for event in pygame.event.get():
            if event.type == pygame.QUIT:
                quit_game()

        keys = pygame.key.get_pressed()

        # Player coordinates
        if keys[pygame.K_LEFT] and player.x > 0:
            player.x -= vel
        if keys[pygame.K_RIGHT] and player.x < 1200 - player.width:
            player.x += vel
        if keys[pygame.K_UP] and player.y > 0:
            player.y -= vel
        if keys[pygame.K_DOWN] and player.y < 600 - player.height:
            player.y += vel

        for wall in walls:
            # Check if the player rectangle collides with a wall rectangle
            if player.colliderect(wall):
                print("Game over")
                pygame.time.wait(1000)
                restart()

        for movingrect in movingrects:
            movingrect.update()  # Movement and bounds checking
            if player.colliderect(movingrect):
                print("Game over")

        # TO DO #
        for movingrect2 in movingrects2:
            movingrect2.update2()
            if player.colliderect(movingrect2):
                print("Game over")

        for movingrect3 in movingrects3:
            movingrect3.update3()
            if player.colliderect(movingrect3):
                print("Game over")

        # Drawing everything
        screen.fill(WHITE)
        pygame.draw.rect(screen, RED, player)

        for wall in walls:
            pygame.draw.rect(screen, BLACK, wall)

        for movingrect in movingrects:
            pygame.draw.rect(screen, GREEN, movingrect)

        for movingrect2 in movingrects2:
            pygame.draw.rect(screen, GREEN, movingrect2)

        for movingrect3 in movingrects3:
            pygame.draw.rect(screen, RED, movingrect3)


        pygame.draw.rect(screen, BLACK, player)
        pygame.display.update()

        pygame.display.flip()
        clock.tick(60)


def main():
    scene = front_page  # Set the current scene.
    while scene is not None:
        # Execute the current scene function. When it's done
        # it returns either the next scene or None which we
        # assign to the scene variable.
        scene = scene()


main()
pygame.quit()

当然，您可以根据需要更改这些移动矩形的初始位置，还可以更改速度和碰撞检测。

此外，作为一个附带说明，您可能想更多地研究面向对象的编程。虽然代码可以正常工作，但从面向对象的角度来看，它不是惯用语言。常见的做法是创建一个名为GameRectangle的超类，而不使用update方法，然后再创建3个类，可能称为Wall，GreenRect和{ {1}}实现了自己的BlackRect方法。

希望此答案对您有所帮助，如果还有其他问题，请随时在下面留下答案！

在pygame中上下移动矩形

1 个答案: