Question

我正在尝试制作一个移动平台，所以当平台到达帷幕点时，它应该反转方向并返回但是从我所看到的它看起来像是振动回来和堡垒节目链接：https://drive.google.com/file/d/0BzvvQCByWwmAQThfdkEtSlRKa1k/view?usp=sharing

这是我的代码：

div.video_div{
    width:800px;
    height:300px;
    border:1px solid red;
    background-color:blue;
    margin:0 auto;
    overflow: hidden; /* Add this */
}
video{
    width:100%;
    height:100%;
    /* Use contain instead if you want the object to fit without cropping */
    object-fit: cover; 
}

Answer 1

您的问题在spd = 5内while True。

您可以使用

更改方向

spd = -spd

但之后用

覆盖它

spd = 5

您必须在spd = 5

之前使用while True

完整版和其他修改。

import pygame
import sys

# --- constants --- (UPPER_CASE names)

WHITE  = (255, 255, 255)
GREEN  = (20, 255, 140)
GREY   = (210, 210 ,210)
WHITE  = (255, 255, 255)
RED    = (255, 0, 0)
PURPLE = (255, 0, 255)
BLACK  = (0,0,0)

SCREEN_WIDTH=1000
SCREEN_HEIGHT=700

# --- classes --- (CamelCase names)

class LBuild(pygame.sprite.Sprite):

    def __init__(self, color, width, height, x, y):
        super().__init__()

        self.image = pygame.Surface([width, height])
        self.image.fill(WHITE)
        self.image.set_colorkey(WHITE)

        # Draw the car (a rectangle!)
        pygame.draw.rect(self.image, color, [0, 0, width, height])

        # Fetch the rectangle object that has the dimensions of the image.
        self.rect = self.image.get_rect()
        self.rect.x = x
        self.rect.y = y

# --- functions --- (lower_case names)

def level_1(screen, all_sprites_list, movblock):

    x = 0

    for _ in range(50):
        all_sprites_list.add(LBuild(GREY, 20, 20, x, 680))
        x += 20

    y = 660
    x2 = 40

    for _ in range(2):
        all_sprites_list.add(LBuild(BLACK, 60, 20, x2, y))
        y -= 20

    mblk = LBuild(RED, 100, 20, 120, 600)
    movblock.add(mblk)

    spd = 5

    # - mainloop -

    clock = pygame.time.Clock()

    #current_time = pygame.time.get_ticks()
    # change something after 2s
    #change_time = current_time + 2000 # 2000ms = 2s

    while True:

        # - events -

        for event in pygame.event.get():
            if event.type == pygame.QUIT:
                # False = exit game
                return False
            if event.type == pygame.KEYDOWN:
                if event.key == pygame.K_ESCAPE:
                    # True = go to next level
                    return True

        # - updates (without draws) -

        #current_time = pygame.time.get_ticks()

        #if current_time >= change_time:
        #    TODO: change something
        #    # change something again after 2s
        #    change_time = current_time + 2000

        all_sprites_list.update()

        if mblk.rect.x > 200:
            spd = -spd

        if mblk.rect.x < 100:
            spd = -spd

        mblk.rect.x += spd

        # - draws (without updates) -

        screen.fill(WHITE)

        all_sprites_list.draw(screen)
        movblock.draw(screen)

        pygame.display.flip()

        # - FPS -

        clock.tick(60)

# --- main ---

# - init -
pygame.init()

screen = pygame.display.set_mode((SCREEN_WIDTH, SCREEN_HEIGHT))
pygame.display.set_caption("Car Racing")

# - game -

all_sprites_list = pygame.sprite.Group()
movblock = pygame.sprite.Group()

goto_next_level = level_1(screen, all_sprites_list, movblock)

#if goto_next_level:
#    goto_next_level = level_2(screen, all_sprites_list, movblock) 

#if goto_next_level:
#    goto_next_level = level_3(screen, all_sprites_list, movblock) 

# - exit -

pygame.quit()
sys.exit()

如何使块在pygame中来回移动

1 个答案: