我如何使用 x 和 y 坐标在我的 pygame 游戏中移动一块

Question

我需要帮助将棋子移动到特定坐标。这是我的代码中移动一块的部分：

    screen.blit(mountain, (300, 500))
    screen.blit(mountain, (300, 400))
def enemy_castle():
    castle = pygame.image.load('castle.png')
    castle = pygame.transform.scale(castle, (100, 100))
    screen.blit(castle, (0, 500))
def player_castle():
    castle = pygame.image.load('castle.png')
    castle = pygame.transform.scale(castle, (100, 100))
    screen.blit(castle, (500, 0))
def enemy_sorcerer():
    s_piece = pygame.image.load('sorcerer.png')
    s_piece = pygame.transform.scale(s_piece, (100, 100))
    screen.blit(s_piece, (400, 0))
    screen.blit(s_piece, (500, 100))

Answer 1

所以你有一张图片，需要绘制到特定位置。因此，不要对 (500, 0) 进行“硬编码”，而是开始将其存储在变量中。

PyGame Rect class 将是完美的，因为它也可以与 blit() 函数一起使用，并且已经有一堆 handy collision functions。

您可以创建一个 Rect，只需向图像询问其 Rect - 除了它位于 (0,0)，因为图像没有位置的概念。

castle_image = pygame.image.load('castle.png').convert_alpha()
castle_image = pygame.transform.scale(castle_image, (100, 100))
castle_rect  = castle_image.get_rect()
castle_rect.topleft = ( 500, 0 )
screen.blit( castle_image, castle_rect )

所以现在变量 castle_rect 类似于 [ x=500, y=0, width=100, height=100 ]

要移动图片的绘制位置，现在只需要调整castle_rect的co-ordinates即可，例如：

castle_rect.x += 10
castle_rect.y += 100
screen.blit( castle_image, castle_rect )

或者，通过再次重置 co-ordinates 来移动整个图像：

castle_rect.topleft = ( 200, 200 )
screen.blit( castle_image, castle_rect )

更有效的方法是在 start-up 上一次加载和缩放图像，然后将它们全部绘制在 main-loop 内当前 rectangle-positions.

def loadImageWithScale( image_filename, size=(100,100) ):
    """ Load the given image file, then rescale the image to size """
    new_image = pygame.image.load( image_filename ).convert_alpha()
    new_image = pygame.transform.scale( new_image, size )
    return new_image

def getImageRectAt( image, position ):
    return image.get_rect( topleft=position )

# Load images
enemy_castle   = loadImageWithScale( 'castle.png' )
enemy_sorcerer = loadImageWithScale( 'sorcerer.png' )
player_castle  = loadImageWithScale( 'castle.png' )

# Set initial positions
enemy_castle_rect   = getImageRectAt( enemy_castle,   ( 0, 500 ) )
enemy_sorceror_rect = getImageRectAt( enemy_sorceror, ( 400, 0 ) )
player_castle_rect  = getImageRectAt( player_castle,  ( 500, 0 ) )

### Main Loop
clock = pygame.time.Clock()
exiting = False
while not exiting:

    # Handle user-input
    for event in pygame.event.get():
        if ( event.type == pygame.QUIT ):
            exiting = True

    # Update the window, but not more than 60fps
    window.fill( ( 128, 128, 128 ) )
    window.blit( enemy_castle,   enemy_castle_rect )
    window.blit( enemy_sorceror, enemy_sorceror_rect )
    window.blit( player_castle,  player_castle_rect )

    pygame.display.flip()

    # Clamp FPS
    clock.tick_busy_loop( 60 )

pygame.quit()

可能当你得到的画面元素比较多的时候，你可以把它们整理成方便的列表，让绘图代码更简洁。

我如何使用 x 和 y 坐标在我的 pygame 游戏中移动一块

how would I go about moving a piece in my pygame game using the x and y coordinates

python-3.x

image

animation

pygame

mouse