--Converted with ttyyuu12345's model to script plugin v4
function sandbox(var,func)
	local env = getfenv(func)
	local newenv = setmetatable({},{
		__index = function(self,k)
			if k=="script" then
				return var
			else
				return env[k]
			end
		end,
	})
	setfenv(func,newenv)
	return func
end
cors = {}
mas = Instance.new("Model",game:GetService("Lighting"))
Model0 = Instance.new("Model")
Script1 = Instance.new("Script")
Script2 = Instance.new("Script")
Model3 = Instance.new("Model")
Part4 = Instance.new("Part")
Part5 = Instance.new("Part")
Part6 = Instance.new("Part")
Script7 = Instance.new("Script")
Part8 = Instance.new("Part")
Part9 = Instance.new("Part")
Part10 = Instance.new("Part")
Part11 = Instance.new("Part")
Part12 = Instance.new("Part")
Part13 = Instance.new("Part")
SpecialMesh14 = Instance.new("SpecialMesh")
Decal15 = Instance.new("Decal")
Script16 = Instance.new("Script")
Model0.Parent = mas
Script1.Name = "Tutorial"
Script1.Parent = Model0
table.insert(cors,sandbox(Script1,function()
-- Hello everyone, ImaBoss838 here. This is a small read me/tutorial on how to set up Redditor's pathfinding zombie ai.

-- Lets start off with the basics:

-- *You can edit the detection distance on the AI in the controller script, i've highlighted the line.
-- *The "Spawner" script is just kind of a duplicator script, it duplicates the zombie and respawns it.
-- *Inside the "Spawner" script there is the model, aka, the zombie AI. You can copy it and paste it as you like.
-- *Inside the Zombie AI there is a script, edit the stats there. (The ones I tell you that you can edit, its marked in the script)

-- Now, with that out of the way, its not really much else to say, right now you cant tweak as much on this AI, unless you know what you're doing.
-- Happy zombie slaying!
end))
Script2.Name = "Spawner"
Script2.Parent = Model0
table.insert(cors,sandbox(Script2,function()
local model = script:GetChildren()[1]:clone()

script.ChildRemoved:connect(function()
	for i = 1, 25 - #script:GetChildren() do
		local m = model:clone()
		m.Parent = script
		m:MoveTo(Vector3.new(math.random() * 200-100, 5, math.random() * 200-100))
	end
end)
script:GetChildren()[1]:Destroy()
end))
Model3.Name = "Zombie A.I"
Model3.Parent = Script2
Part4.Name = "Right Leg"
Part4.Parent = Model3
Part4.CFrame = CFrame.new(-12.199996, 1.90001094, -16.1000061, 1, 0, 0, 0, 1, 0, 0, 0, 1)
Part4.Position = Vector3.new(-12.199996, 1.90001094, -16.1000061)
Part4.Color = Color3.new(0, 0.560784, 0.611765)
Part4.Transparency = 1
Part4.Size = Vector3.new(1, 1, 1)
Part4.Anchored = true
Part4.BottomSurface = Enum.SurfaceType.Smooth
Part4.BrickColor = BrickColor.new("Bright bluish green")
Part4.Locked = true
Part4.TopSurface = Enum.SurfaceType.Smooth
Part4.brickColor = BrickColor.new("Bright bluish green")
Part4.FormFactor = Enum.FormFactor.Custom
Part4.formFactor = Enum.FormFactor.Custom
Part5.Name = "Torso"
Part5.Parent = Model3
Part5.CFrame = CFrame.new(-12.199996, 3.00001192, -16.1000061, 1, 0, 0, 0, 1, 0, 0, 0, 1)
Part5.Position = Vector3.new(-12.199996, 3.00001192, -16.1000061)
Part5.Color = Color3.new(0.388235, 0.372549, 0.384314)
Part5.Transparency = 1
Part5.Size = Vector3.new(2, 2, 2)
Part5.Anchored = true
Part5.BottomSurface = Enum.SurfaceType.Smooth
Part5.BrickColor = BrickColor.new("Dark stone grey")
Part5.Friction = 0
Part5.Locked = true
Part5.TopSurface = Enum.SurfaceType.Smooth
Part5.brickColor = BrickColor.new("Dark stone grey")
Part5.FormFactor = Enum.FormFactor.Symmetric
Part5.formFactor = Enum.FormFactor.Symmetric
Part5.Shape = Enum.PartType.Ball
Part6.Name = "Head"
Part6.Parent = Model3
Part6.CFrame = CFrame.new(-12.199996, 4.50000381, -16.1000061, 1, 0, 0, 0, 1, 0, 0, 0, 1)
Part6.Position = Vector3.new(-12.199996, 4.50000381, -16.1000061)
Part6.Color = Color3.new(0, 0.560784, 0.611765)
Part6.Transparency = 1
Part6.Size = Vector3.new(1, 1, 1)
Part6.Anchored = true
Part6.BottomSurface = Enum.SurfaceType.Smooth
Part6.BrickColor = BrickColor.new("Bright bluish green")
Part6.FrontSurface = Enum.SurfaceType.Hinge
Part6.Locked = true
Part6.TopSurface = Enum.SurfaceType.Smooth
Part6.brickColor = BrickColor.new("Bright bluish green")
Part6.FormFactor = Enum.FormFactor.Custom
Part6.formFactor = Enum.FormFactor.Custom
Script7.Parent = Model3
table.insert(cors,sandbox(Script7,function()
local ai = {}
ai.Model = script.Parent

-- The zombies memory. (You can edit these stats)
local goalPos
local lastAttack = time()
local attackTime = .3
local atkDamage = 5
local goalHumanoid
local running
local running2
local crawling
local limp = {}
for i = 1, 10 do
	limp[i] = (math.random() * 2) - 1
end

-- Global functions. (I wouldnt mess with this..)
ai.Move = function(loc, mustSee, humanoid)
	goalHumanoid = humanoid
	if goalPos then
		goalPos = loc
	else
		goalPos = loc
		Spawn(function()
			ai.State = "Tracking"
			local lastGoal
			local lastTime = time()
			while goalPos and ai.Humanoid do
				local gp = goalPos
				if pcall(function() return goalPos.X end) then
				elseif goalPos:IsA("BasePart") then
					gp = (ai.canSee(goalPos) or not mustSee) and goalPos.Position or nil
					lastTime = time()
				elseif goalPos:IsA("Model") then
					gp = nil
					for _, bodyPart in pairs(goalPos:GetChildren()) do
						if bodyPart:IsA("BasePart") and (ai.canSee(bodyPart) or not mustSee) then
							gp = goalPos:GetModelCFrame().p
							lastTime = time()
							break
						end
					end
				end
				lastGoal = gp and humanoid and gp + (gp - ai.Model.Torso.Position).unit * 10 or gp or lastGoal or ai.Model.Torso.Position
				if (goalHumanoid and goalHumanoid.Health <= 0) or (not goalHumanoid and (ai.Model.Torso.Position - lastGoal).magnitude < 3) or time() - lastTime > 3 then
					goalPos = nil
				else
					ai.Humanoid.Jump = objAhead(lastGoal)
					ai.Humanoid:MoveTo(lastGoal, workspace.Terrain)
					if goalHumanoid and ((ai.Model.Torso.Position - goalPos:GetModelCFrame().p) * Vector3.new(1,.5,1)).magnitude < 3 and time() - lastAttack > attackTime then
						attack(goalHumanoid)
					end
				end
				wait(.1)
			end
			if ai then
				ai.State = "Idle"
			end
		end)
	end
end




--local functions
function weld(a, b, c0, c1)
	local w = Instance.new("Weld", a)
	w.Part0 = a
	w.Part1 = b
	if c0 then w.C0 = c0 end
	if c1 then w.C1 = c1 end
	return w
end

function setHeight(n)
	if ai.Model:findFirstChild("Right Leg") then
		ai.Model["Right Leg"]:BreakJoints()
		ai.Model["Right Leg"].Size = ai.Model["Right Leg"].Size * Vector3.new(1,0,1) + Vector3.new(0, math.max(0.2, n or 0),0)
		weld(ai.Model.Torso, ai.Model["Right Leg"], CFrame.new(0, -n + ai.Model["Right Leg"].Size.Y/2 - ai.Model.Torso.Size.Y/2,0))
	end
	if m and ai.Model:findFirstChild("Head") then
		ai.Model.Head:BreakJoints()
		weld(ai.Model.Torso, ai.Model.Head, CFrame.new(0, m - ai.Model.Head.Size.Y/2 + ai.Model.Torso.Size.Y/2,0))
	end
end

function objAhead(loc)
	if not _G.AntiJumpCache then
		_G.AntiJumpCache = {}
	end
	local ray = Ray.new(ai.Model.Torso.Position, ((loc - ai.Model.Torso.Position) * Vector3.new(1,0,1)).unit * 5)
	local obj, pos = workspace:FindPartOnRayWithIgnoreList(ray, _G.AntiJumpCache)
	if obj then
		if not obj.CanCollide then
			table.insert(_G.AntiJumpCache, obj)
		elseif obj.Parent:findFirstChild("Humanoid") then
			table.insert(_G.AntiJumpCache, obj.Parent)
		else
			return true
		end
		--add to cache if necessary, otherwise recurse
		return objAhead(loc)
	end
end

function ai.canSee(obj, fov)
	local direction = (obj.Position - ai.Model.Head.Position).unit
	if fov and direction:Dot(ai.Model.Head.CFrame.lookVector) < math.cos(math.rad(fov)) then
		return false
	end
	local ray = Ray.new(ai.Model.Head.Position, direction * 900)
	local hit, pos = workspace:FindPartOnRayWithIgnoreList(ray, {ai.Model})
	if hit then
		--add to cache if transparent?
		if hit == obj then
			return true
		end
	end
end

function attack(hum)
	print("pow")
	lastAttack = time()
	hum:TakeDamage(atkDamage)
end

function initialize()
	for _, obj in pairs(ai.Model:GetChildren()) do
		if obj:IsA("BasePart") then
			obj.Anchored = false
		end
	end
	setHeight(2, 1)
	ai.tWeld = weld(ai.Model.Torso, ai.Model.torso, CFrame.new(0,-1,0), CFrame.new(0,-1,0) * CFrame.Angles(math.rad(45),0,0))
	ai.hWeld = weld(ai.Model.torso, ai.Model.head2, CFrame.new(0,.8,0), CFrame.new(0,-.6,0) * CFrame.Angles(math.rad(-22.5),0,0))
	ai.lWeld1 = weld(ai.Model.torso, ai.Model.leftLeg, CFrame.new(-0.5,-1,0), CFrame.new(0,1,0) * CFrame.Angles(math.rad(-45),0,0))
	ai.lWeld2 = weld(ai.Model.torso, ai.Model.rightLeg, CFrame.new(0.5,-1,0), CFrame.new(0,1,0) * CFrame.Angles(math.rad(-45),0,0))
	ai.aWeld1 = weld(ai.Model.torso, ai.Model.leftArm, CFrame.new(-1,0.5,0), CFrame.new(0.5,0.5,0) * CFrame.Angles(math.rad(-45),0,0))
	ai.aWeld2 = weld(ai.Model.torso, ai.Model.rightArm, CFrame.new(1,0.5,0), CFrame.new(-0.5,0.5,0) * CFrame.Angles(math.rad(-45),0,0))
	ai.HWeld = weld(ai.Model.Torso, ai.Model.Head)
	anim(math.rad(20),0,0)
	ai.Humanoid = Instance.new("Humanoid", ai.Model)
	ai.Humanoid.WalkSpeed = math.random(8,14) + math.max(0, math.random(-5,3))
	ai.State = "Idle"
	ai.Model.ChildRemoved:connect(delete)
	ai.Humanoid.Died:connect(delete)
	ai.Humanoid.Running:connect(animate)
	table.insert(_G.aiTable, ai)
end

function delete()
	wait(0)
	if not ai.Humanoid or not (ai.Humanoid.Health > 0) or not ai.Model:findFirstChild("Torso") or not ai.Model:FindFirstChild("Head") or not ai.Model:FindFirstChild("head2") then
		for i, a in pairs(_G.aiTable) do
			if a == ai then
				table.remove(_G.aiTable, i)
			end
		end
		ai.Model:BreakJoints()
		game.Debris:AddItem(ai.Model, 3)
		for i, obj in pairs(ai.Model:GetChildren()) do
			if obj:IsA("BasePart") and obj.Transparency ~= 1 then
				obj.CanCollide = true
			elseif obj ~= script then
				obj:Destroy()
			end
		end
		ai = nil
		goalPos = nil
	elseif not (ai.Model:FindFirstChild("leftLeg") and ai.Model:FindFirstChild("rightLeg")) and not crawling then
		crawl()
	end
	if ai and crawling and not (ai.Model:FindFirstChild("leftArm") and ai.Model:FindFirstChild("rightArm")) then
		ai.Humanoid.Health = 0
	end
end

function animate(a)
	if not running2 then
		running = a > 0
		if running then
			Spawn(function()
				running2 = true
				local start = time()
				while running do
					wait(0)
					local cycle = (tick() - start) * 5
					local tPitch = math.rad(25 + math.cos(cycle * 2) * -5)
					local tRoll = math.rad(math.sin(cycle) * 10)
					local lPitch = math.rad(math.sin(cycle) * 45)
					anim(tPitch, tRoll, lPitch)
				end
				running2 = false
				anim(math.rad(20),0,0)
			end)
		end
	else
		running = a > 0
	end
end

function anim(tPitch, tRoll, lPitch)
	if not ai then return end
	local crawlMod = crawling and math.rad(50) or 0
	local crawlMod2 = crawling and 4 or 1
	local attackMod = (attackTime - math.min(attackTime,(time() - lastAttack)))/attackTime * math.rad(140)
	lPitch2 = crawling and lPitch / 3 or lPitch
	if ai.tWeld then
		ai.tWeld.C1 =  CFrame.new(0,-1,0) * CFrame.Angles(tPitch + crawlMod,0,tRoll + limp[1] * .4)
	end
	if ai.hWeld then
		ai.hWeld.C1 =  CFrame.new(0,-0.6,0) * CFrame.Angles(-tPitch/2,0,tRoll + limp[2] * .4)
	end
	if ai.lWeld1 then
		ai.lWeld1.C1 = CFrame.new(0,1,0) * CFrame.Angles(lPitch2 - tPitch + crawlMod + limp[3] * .4,0,-tRoll - limp[1] * .4)
	end
	if ai.lWeld2 then
		ai.lWeld2.C1 = CFrame.new(0,1,0) * CFrame.Angles(-lPitch2 - tPitch + crawlMod + limp[4] * .4,0,-tRoll - limp[1] * .4)
	end
	if ai.aWeld1 then
		ai.aWeld1.C1 =  CFrame.new(0.5,0.5,0) * CFrame.Angles(0,0, crawlMod/2) * CFrame.Angles(lPitch * math.abs(limp[5]) * -0.4 * crawlMod2 - tPitch - crawlMod - attackMod + limp[5] * .2, 0, -tRoll - limp[1] * .4)
	end
	if ai.aWeld2 then
		ai.aWeld2.C1 =  CFrame.new(-0.5,0.5,0) * CFrame.Angles(0,0, -crawlMod/2) * CFrame.Angles(lPitch * math.abs(limp[6]) * 0.4 * crawlMod2 - tPitch - crawlMod - attackMod + limp[6] * .2, 0, -tRoll  - limp[1] * .4)
	end
	if ai.HWeld and ai.Model:findFirstChild("head2") then
		ai.HWeld.C0 = ai.Model.Torso.CFrame:toObjectSpace(ai.Model.head2.CFrame)
	end
end

function crawl()
	crawling = true
	setHeight(0,0)
	ai.Humanoid.WalkSpeed = math.random(4, 6)
end

while not _G.aiTable do
	wait(0)
end
initialize()
end))
Part8.Name = "rightLeg"
Part8.Parent = Model3
Part8.CFrame = CFrame.new(-11.699996, 1.00001299, -16.1000061, 1, 0, 0, 0, 1, 0, 0, 0, 1)
Part8.Position = Vector3.new(-11.699996, 1.00001299, -16.1000061)
Part8.Color = Color3.new(1, 0, 0)
Part8.Size = Vector3.new(1, 2, 0.99999994)
Part8.Anchored = true
Part8.BottomSurface = Enum.SurfaceType.Smooth
Part8.BrickColor = BrickColor.new("Really red")
Part8.CanCollide = false
Part8.TopSurface = Enum.SurfaceType.Smooth
Part8.brickColor = BrickColor.new("Really red")
Part8.FormFactor = Enum.FormFactor.Custom
Part8.formFactor = Enum.FormFactor.Custom
Part9.Name = "leftLeg"
Part9.Parent = Model3
Part9.CFrame = CFrame.new(-12.699996, 1.00001299, -16.1000061, 1, 0, 0, 0, 1, 0, 0, 0, 1)
Part9.Position = Vector3.new(-12.699996, 1.00001299, -16.1000061)
Part9.Color = Color3.new(1, 0, 0)
Part9.Size = Vector3.new(1, 2, 0.99999994)
Part9.Anchored = true
Part9.BottomSurface = Enum.SurfaceType.Smooth
Part9.BrickColor = BrickColor.new("Really red")
Part9.CanCollide = false
Part9.TopSurface = Enum.SurfaceType.Smooth
Part9.brickColor = BrickColor.new("Really red")
Part9.FormFactor = Enum.FormFactor.Custom
Part9.formFactor = Enum.FormFactor.Custom
Part10.Name = "leftArm"
Part10.Parent = Model3
Part10.CFrame = CFrame.new(-13.7000055, 3.00001192, -16.1000061, 1, 0, 0, 0, 1, 0, 0, 0, 1)
Part10.Position = Vector3.new(-13.7000055, 3.00001192, -16.1000061)
Part10.Color = Color3.new(1, 0, 0)
Part10.Size = Vector3.new(1, 2, 0.99999994)
Part10.Anchored = true
Part10.BottomSurface = Enum.SurfaceType.Smooth
Part10.BrickColor = BrickColor.new("Really red")
Part10.CanCollide = false
Part10.TopSurface = Enum.SurfaceType.Smooth
Part10.brickColor = BrickColor.new("Really red")
Part10.FormFactor = Enum.FormFactor.Custom
Part10.formFactor = Enum.FormFactor.Custom
Part11.Name = "torso"
Part11.Parent = Model3
Part11.CFrame = CFrame.new(-12.199996, 3.00001192, -16.1000061, 1, 0, 0, 0, 1, 0, 0, 0, 1)
Part11.Position = Vector3.new(-12.199996, 3.00001192, -16.1000061)
Part11.Color = Color3.new(1, 0, 0)
Part11.Size = Vector3.new(2, 2, 0.99999994)
Part11.Anchored = true
Part11.BottomSurface = Enum.SurfaceType.Smooth
Part11.BrickColor = BrickColor.new("Really red")
Part11.CanCollide = false
Part11.Locked = true
Part11.TopSurface = Enum.SurfaceType.Smooth
Part11.brickColor = BrickColor.new("Really red")
Part11.FormFactor = Enum.FormFactor.Custom
Part11.formFactor = Enum.FormFactor.Custom
Part12.Name = "rightArm"
Part12.Parent = Model3
Part12.CFrame = CFrame.new(-10.699996, 3.00001192, -16.1000061, 1, 0, 0, 0, 1, 0, 0, 0, 1)
Part12.Position = Vector3.new(-10.699996, 3.00001192, -16.1000061)
Part12.Color = Color3.new(1, 0, 0)
Part12.Size = Vector3.new(1, 2, 0.99999994)
Part12.Anchored = true
Part12.BottomSurface = Enum.SurfaceType.Smooth
Part12.BrickColor = BrickColor.new("Really red")
Part12.CanCollide = false
Part12.TopSurface = Enum.SurfaceType.Smooth
Part12.brickColor = BrickColor.new("Really red")
Part12.FormFactor = Enum.FormFactor.Custom
Part12.formFactor = Enum.FormFactor.Custom
Part13.Name = "head2"
Part13.Parent = Model3
Part13.CFrame = CFrame.new(-12.199996, 4.50000381, -16.1000061, 1, 0, 0, 0, 1, 0, 0, 0, 1)
Part13.Position = Vector3.new(-12.199996, 4.50000381, -16.1000061)
Part13.Color = Color3.new(1, 0, 0)
Part13.Size = Vector3.new(1, 1, 1)
Part13.Anchored = true
Part13.BottomSurface = Enum.SurfaceType.Smooth
Part13.BrickColor = BrickColor.new("Really red")
Part13.CanCollide = false
Part13.TopSurface = Enum.SurfaceType.Smooth
Part13.brickColor = BrickColor.new("Really red")
Part13.FormFactor = Enum.FormFactor.Custom
Part13.formFactor = Enum.FormFactor.Custom
SpecialMesh14.Parent = Part13
SpecialMesh14.Scale = Vector3.new(1.39999998, 1.39999998, 1.39999998)
Decal15.Name = "Rage Face"
Decal15.Parent = Part13
Decal15.Texture = "http://www.roblox.com/asset/?id=109676489"
Script16.Name = "Controller"
Script16.Parent = Model0
table.insert(cors,sandbox(Script16,function()
_G.aiTable = {}

while wait(.1) do
	for i, ai in pairs(_G.aiTable) do
		if ai ~= nil and ai.State == "Idle" then
			local closestChar
			local closestDist = 200 -- Edit this value, it changes how close you have to be to the zombie for it to attack or "see" you.
			local pos = ai.Model:GetModelCFrame().p
			for j, player in pairs(game.Players:GetPlayers()) do
				if player.Character and player.Character:findFirstChild("Humanoid") and player.Character.Humanoid.Health > 0 then
					local dist = (player.Character:GetModelCFrame().p - pos).magnitude
					if dist <= closestDist then
						for _, obj in pairs(player.Character:GetChildren()) do
							if obj:IsA("BasePart") and (ai.canSee(obj, 85) or ai.canSee(obj) and dist <= 10)then
								closestChar = player.Character
								closestDist = dist
								break
							end
						end
					end
				end
			end
			if closestChar then
				ai.Move(closestChar, true, closestChar:findFirstChild("Humanoid"))
			elseif math.random() > 0.8 then
				local dir = CFrame.Angles(0,math.random() * math.pi * 2,0).lookVector
				local _, pos = workspace:FindPartOnRay(Ray.new(ai.Model:GetModelCFrame().p, dir * math.random(10,20)), ai.Model)
				pos = pos - dir * 5
				ai.Move(pos)
			end
		end
	end
end
end))
for i,v in pairs(mas:GetChildren()) do
	v.Parent = script
	pcall(function() v:MakeJoints() end)
end
mas:Destroy()
for i,v in pairs(cors) do
	spawn(function()
		pcall(v)
	end)
end