值不降低

Question

在main.lua我有这个：

function love.load()
  LoadBasic()
  LoadSprites()
  LoadPlayer()
  LoadZombies()
end

function love.update(dt)
  PlayerMovement(dt)
  ZombieMovement(dt)
  BulletMovement(dt)

  BulletHitZombie()
  EnemySpawning(dt)
end

function love.draw()
  DrawBackground()
  DrawPlayer()
  DrawMenu()
  DrawGrunts()
  DrawBullets()

  DrawTimer()
end

EnemySpawning()看起来像这样：

function EnemySpawning(dt)
  if gameActive == 1 then
    GruntSpawning(dt)
    RunnerSpawning(dt)
  end
end

GruntSpawning(dt)看起来像这样：

function GruntSpawning(dt)
  gruntTimer = gruntTimer - dt
    if gruntTimer <= 0 then --timer hits 0, spawn zombie
      SpawnGrunt()
      if gruntCD >= gruntMinCD then 
        gruntCD = gruntCD * gruntTimerDecr --zombies spawn faster over time
        gruntTimer = gruntCD
      else
        gruntTimer = gruntMinCD -- faster to a certain degree
      end
    end
end

最后，SpawnGrunt()看起来像这样：

function SpawnGrunt()
  local side = math.random(1, 4)

  if side == 1 then
    grunt.x = -30
    grunt.y = math.random(0, scrHeight)
  elseif side == 2 then
    grunt.x = math.random(0, scrWidth)
    grunt.y = -30
  elseif side == 3 then
    grunt.x = scrWidth + 30
    grunt.y = math.random(0, scrHeight)
  else
    grunt.x = math.random( 0, scrWidth )
    grunt.y = scrHeight + 30
  end

  table.insert( zombies, grunt )
end

根据我的理解，love.update(dt)每秒被调用60次（或者无论FPS是什么）。由于我EnemySpawning(dt)下love.update()，因此该函数每秒调用60次。然而，gruntTimer，每秒应减少1，不会改变。我做错了什么？

编辑：问题到底是gameState == 1没有实现，因为它应该是gameState == true。