Grimrock

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viperBossDefeated = false

function checkForThings(thing,xMin,xMax,yMin,yMax)
	for x = xMin,xMax do
    	for y = yMin,yMax do
        	for entity in self.go.map:entitiesAt(x,y) do
            	if entity.name == thing then
                	return true
                end
            end
        end
    end
    return false
end
	
function viperBossFinish()
	local b = findEntity("vinesBossFight")
	local c = findEntity("vinesBossCounter")
	
	if viperBossDefeated == false 
	and not (checkForThings("viperRootBoss_1",1,31,1,31) 
	or checkForThings("viperRootBoss_2",1,31,1,31) 
	or checkForThings("viperRootBoss_3",1,31,1,31)) then
    	viperBossDefeated = true
		if b ~= nil then
			b:destroyDelayed()
		end
		if c ~= nil then
			c:destroyDelayed()
		end 
		hudPrint("Boss fight finished")
	end
end

	function bossstart()
		
		if viperBossDefeated == true then
			hudPrint("You have already fought the boss")
       		return false
		end
		
		--if wanting to check within an area on self.level
		if viperBossDefeated == false then
			for n = 1,3 do
				if findEntity("viperRootBoss_"..n) ~= nil then
					local vleft = viperBossCounter.counter:getValue()
					local vName = vinesBossFight.bossfight:getBossName()
					if vleft > 1 then
						hudPrint("You are currently fighting the boss... there are still "..vleft.." "..vName.."s remaining.")
					elseif vleft == 1 then
						hudPrint("You are currently fighting the boss... there is only 1 "..vName.." remaining.")
					end
   					return false
				end
			end
       	end

		local b = findEntity("vinesBossFight")
		if b == nil and viperBossDefeated == false then
			local bScript = spawn("boss_fight", self.level,self.x,self.y,self.elevation,self.facing,"vinesBossFight")
			vinesBossFight.bossfight:setBossName("Viper Roots")
			vinesBossFight.bossfight:setAutoDeactivate(true)
			vinesBossFight.bossfight:setMusic("boss_fight_viper")
			vinesBossFight.bossfight:activate()
			
			local c = spawn("counter",self.level,self.x,self.y,self.elevation,self.facing,"viperBossCounter")
			c.counter:setValue(3)
			c.counter:addConnector("onActivate", "bossScripts", "viperBossFinish")
			
			for n = 1,3 do
				local v = spawn("viper_root",self.level,self.x,self.y,self.elevation,self.facing,"viperRootBoss_"..n)
				vinesBossFight.bossfight:addMonster(v.monster)
				v.monster:setMaxHealth(700)
				v.monster:addConnector("onDie", "viperBossCounter", "decrement")
			end
		end
	end