康威的“生命游戏”：为什么模式行为不正确？

Question

我试图在卢阿创建康威的“生命游戏”。

游戏字段是一个有100行47列(4700个单元格总数)的二维圆桌，其中一个单元格的值可以是1(活着)或0(死)。

问题是，当我试图创建一个闪光灯，并使一个模式的3个活细胞在彼此之间，两个边细胞死亡在下一代，而没有其他的活的。我也曾尝试过制造滑翔机，但在下一代，它的上、中、左下角的滑翔机都死了，然后模式就静止了。

当我尝试调试时，所有变量似乎都有正确的值，因此我认为问题在于函数nextGen()中的值分配从表field到nfield，反之亦然。我可能做错什么了？

-- Game window's width and height. 
-- Rows 48, 49, and 50 are used for control tips and program information
local width = 100
local height = 50

-- Current generation field
local field = {}
-- Next generation field
local nfield = {}

-- UI Color codes
local black = 0x000000
local white = 0xFFFFFF

-- Field clearing/generation
local function clearField()
  -- Making the field array circular (code from https://stackoverflow.com/a/63169007/12696005)
  setmetatable(field, {
  __index = function(t,i)
    local index = i%width
    index = index == 0 and width or index
    return t[index] end
  })
  --
  for gx=1,width do
    field[gx] = {}
    nfield[gx] = {}
    -- Making the field array circular pt.2
    setmetatable(field[gx], {
    __index = function(t,i)
      local index = i%height-3
      index = index == 0 and height-3 or index
      return t[index] end
    })
    --
    for gy=1,height-3 do
      field[gx][gy] = 0
    end
  end
end

--Field redraw
local function drawField(data)
  for x=1, width do
    for y=1,height-3 do
      if data[x][y]==1 then
        -- Alive cell
        display.setBackgroundColor(white)
        display.setForegroundColor(black)
      else
        -- Dead cell
        display.setBackgroundColor(black)
        display.setForegroundColor(white)
      end
      -- Drawing the cell
      display.fillRectangle(x, y, 1, 1, " ")
    end
  end
end

--- Calculating next generation field
local function nextGen()
  -- Going through all the table
  for x=1,width do
    for y=1,height-3 do
      local livingCells = 0
      -- Calculation of living cells around x:y
      for i=x-1,x+1 do
        for j=y-1,y+1 do
          livingCells = livingCells + field[i][j]
        end
      end
      -- Substracting the x:y cell from the overall amount
      livingCells = livingCells - field[x][y]
      -- Cell spawns
      if field[x][y]==0 and livivngCells==3 then
        nfield[x][y] = 1
      -- Cell dies
      elseif field[x][y]==1 and (livingCells < 2 or livingCells > 3) then
        nfield[x][y] = 0
      -- Remains the same
      else
        nfield[x][y] = field[x][y]
      end
    end
  end
end

-- Game loop
clearField()
while true do
  local lastEvent = {events.listenFilter(filter)}
  -- Cell creation/deletion
  if lastEvent[1] == "mouseClicked" and lastEvent[5] == "lmb" then
    --State invertion and cell redrawing
    if field[lastEvent[3]][lastEvent[4]]==1 then
      field[lastEvent[3]][lastEvent[4]] = 0
      display.setBackgroundColor(black)
      display.setForegroundColor(white)
    else
      field[lastEvent[3]][lastEvent[4]] = 1
      display.setBackgroundColor(white)
      display.setForegroundColor(black)
    end
    display.fillRectangle(lastEvent[3], lastEvent[4], 1, 1, " ")
  elseif lastEvent[1] == "key_pressed" then
    -- Previous generation
    if lastEvent[4] == keyboard.lbracket then
      drawField(field)
    -- Next generation
    elseif lastEvent[4] == keyboard.rbracket then
      display.setBackgroundColor(blue)
      display.fillRectangle(1, height-2, width, 1, " ")
      nextGen()
      drawField(nfield)
      for i=1,width do
        for j=1,height-3 do
          field[i][j] = nfield[i][j]
        end
      end
    elseif lastEvent[4] == keyboard.backslash then
      -- more code --
    end
  end
end

变量display、keyboard和events是库。

Answer 1

结果发现，唯一的问题是livingCells在行if field[x][y]==0 and livivngCells==3 then中拼写错误。