Pathfinding and Chase after Player

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#1

I want to achieve a Npc that pathfinds around walls and chase after players when seen moving around. When the player stops moving around the npc stops chasing after the player and goes back to pathfinding. The pathfinding parts is in my workspace in a folder named PathfindingParts. The parts are labeled 1-9. The issue here is that the code does not work but no errors in the output either. I searched about this but haven’t found a solution for this yet.

RobloxScreenShot20230226_215906974
RobloxScreenShot20230226_2159069741360×810 51.8 KB

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Here’s the code:

local PathfindingService = game:GetService("PathfindingService")
local Players = game:GetService("Players")
local RunService = game:GetService("RunService")

local PathfindingFolder = workspace.PathfindingParts
local NPC = workspace.PathfindingNPC
local Player = nil
local Path = nil
local CurrentWaypoint = nil

local function onPlayerAdded(player)
	Player = player
end

Players.PlayerAdded:Connect(onPlayerAdded)

function getNextWaypoint()
	if CurrentWaypoint == nil or CurrentWaypoint.Parent == nil then
		CurrentWaypoint = PathfindingFolder:GetChildren()[1]
	else
		local index = table.find(PathfindingFolder:GetChildren(), CurrentWaypoint)
		if index ~= nil and index < #PathfindingFolder:GetChildren() then
			CurrentWaypoint = PathfindingFolder:GetChildren()[index+1]
		else
			CurrentWaypoint = PathfindingFolder:GetChildren()[1]
		end
	end
	return CurrentWaypoint.Position
end

function followPlayer()
	if Player == nil or Player.Parent == nil then
		return
	end

	local playerPosition = Player.Character and Player.Character.HumanoidRootPart.Position or nil

	if playerPosition == nil then
		return
	end

	local distance = (NPC.HumanoidRootPart.Position - playerPosition).Magnitude

	if distance <= 10 then
		NPC.Humanoid:TakeDamage(15)
	end

	if distance > 15 then
		Path = nil
		return
	end

	if Path == nil then
		Path = PathfindingService:CreatePath()
		Path:ComputeAsync(NPC.HumanoidRootPart.Position, playerPosition)
		CurrentWaypoint = nil
	end

	local waypoints = Path:GetWaypoints()
	if #waypoints == 0 then
		return
	end

	local nextWaypoint = waypoints[1]

	if nextWaypoint.Action == Enum.PathWaypointAction.Jump then
		NPC.Humanoid.Jump = true
	end

	if nextWaypoint.Action == Enum.PathWaypointAction.MoveTo then
		NPC.Humanoid:MoveTo(Vector3.new(nextWaypoint.Position.X, NPC.HumanoidRootPart.Position.Y, nextWaypoint.Position.Z))
	end

	if nextWaypoint.Action == Enum.PathWaypointAction.Finish then
		Path = nil
	end
end

RunService.Heartbeat:Connect(function()
	if Player == nil or Player.Parent == nil then
		followPlayer = nil
		getNextWaypoint()
	elseif Player.Character ~= nil and Player.Character.HumanoidRootPart ~= nil then
		if followPlayer ~= nil then -- add a check to make sure followPlayer is not nil before calling it
			followPlayer()
		end
	else
		getNextWaypoint()
	end
end)