等距图块地图未正确排列

Question

我正在创建一个等距的《我的世界》克隆，并且我的代码运行良好。我使用舍入函数来舍入玩家的位置，以便块捕捉到网格。该块的图像精确为 32x32 像素，并且图像中的所有内容都是对称的。

我目前将舍入函数设置为 X 轴上的 16 个像素和 Y 轴上的 8 个像素。问题出在 Y 轴上，因为如果您不按正确的顺序放置它们，这会导致一些块重叠。我不知道如何解决这个问题，因为我已经尝试过使用舍入函数。如有帮助，将不胜感激。这是代码：

import pygame

pygame.init()
win = pygame.display.set_mode((480,320))
pygame.display.set_caption(("Mini Minecraft"))
block = pygame.image.load("Stone.png")
pygame.display.set_icon(block)
background = pygame.image.load("Background.png")
running = True

positions = []

def roundToMultiple(n, m):
    return round(n / m) * m

while running:
    for event in pygame.event.get():
        if event.type == pygame.QUIT:
            running = False
            pygame.quit()
            
        if event.type == pygame.MOUSEBUTTONDOWN:
            placeX, placeY = event.pos  
            placeXRound = roundToMultiple(placeX, 16)
            placeYRound = roundToMultiple(placeY, 8)
            positions.append((placeXRound, placeYRound))

        if event.type == pygame.KEYDOWN:
            if event.key == pygame.K_SPACE:
                positions = []

    mouseX, mouseY = pygame.mouse.get_pos()
    
    mouseXRound = roundToMultiple(mouseX, 16)
    mouseYRound = roundToMultiple(mouseY, 8)

    if mouseXRound > 448:
        mouseXRound = 448
    if mouseYRound > 288:
        mouseYRound = 288

    win.blit(background, (0,0))
    for pos in positions:
        win.blit(block, pos)
    win.blit(block, (mouseXRound, mouseYRound))
    pygame.display.update()

Answer 1

您只需对点列表进行排序即可。根据 x 坐标和逆 y 坐标对列表进行排序：

if event.type == pygame.MOUSEBUTTONDOWN:
    placeX, placeY = event.pos  
    placeXRound = roundToMultiple(placeX, 16)
    placeYRound = roundToMultiple(placeY, 8)
    positions.append((placeXRound, placeYRound))
    temp = [(x, -y) for x, y in positions]
    temp.sort()
    positions = [(x, -y) for x, y in temp]