Pathfinding ai bug

[mrcrablolxqqq (tea)]

You can write your topic however you want, but you need to answer these questions:

1. What do you want to achieve? Keep it simple and clear!

A really good pathfinding AI for enemies

2. What is the issue? Include screenshots / videos if possible!

The ai makes the rig rotate strangely, no other problems

3. What solutions have you tried so far? Did you look for solutions on the Developer Hub?

Nope

After that, you should include more details if you have any. Try to make your topic as descriptive as possible, so that it’s easier for people to help you!

local hrt=script.Parent.HumanoidRootPart
local hum=script.Parent.Humanoid
local pfs=game:GetService("PathfindingService")

local anim=hum:LoadAnimation(script.attack)

db=false

local function FindTarget()
	local target
	local distance
	local maxdistance=600
	
	for i,v in pairs(game.Players:GetPlayers()) do
		if v.Character then
			local hrp=v.Character:FindFirstChild("HumanoidRootPart")
			local distance=(hrt.Position-hrp.Position).magnitude
			if distance<maxdistance then
				target=hrp
				maxdistance=distance
			end
			if distance<5 then
				if db==false then
					anim:Play()
					target.Parent.Humanoid.Health=0
					db=true
					wait(game.Players.RespawnTime)
					db=false
				end
			end
		end
	end
	return target
end

local path=pfs:CreatePath({
	AgentCanJump=true,
	AgentCanClimb=true
})

local function follow(target)
	path:ComputeAsync(hrt.Position, target.Position)
	local wp=path:GetWaypoints()
	for i,v in wp do
		hum:MoveTo(v.Position)
		task.wait()
	end
end

while task.wait() do
	local target=FindTarget()
	if target then
		follow(target)
	end
end

RobloxStudioPathfindingAiBugFix.mp4

Untitled Game - Roblox Studio 2025-01-03 17-32-29.mp4

[M_etrics]

I would try to increase the WaypointSpacing and to debug add small coloured parts to demonstrate the path created.

[awry_y (Charlotte)]

@mrcrablolxqqq

local function follow(target)
	path:ComputeAsync(hrt.Position, target.Position)
	local wp=path:GetWaypoints()
	for i,v in wp do
		hum:MoveTo(v.Position)
		task.wait()
	end
end

local function follow(target)
	path:ComputeAsync(hrt.Position, target.Position)
	local wp=path:GetWaypoints()
	for i,v in wp do
		hum:MoveTo(v.Position)
		hum.MoveToFinished:Wait()
	end
end

[mrcrablolxqqq (tea)]

if i do movetofinished it wont be as good as it was, ill send results after a minute

[mrcrablolxqqq (tea)]

bug.mp4

[notsad2 (nots7d)]

this is because of the frequency of new paths being created

you wait for the humanoid to finish its current path before creating another one, which is why it’s like that

.MoveToFinished:Wait() yields until the humanoid is done moving to the specified position, where task.wait() waits 1 frame

the fix to this is to just put the follow function in a coroutine, you can do this by doing task.spawn(follow, target)

[M_etrics]

@watIsInTheName

You are correct. We will update our documentation for this use case and share an example code snippet. In the meantime, I would recommend looking at the implementation of ClickToMoveController. Specifcailly search for IsCurrentWaypointReached function. You would notice that ClickToMove controller does not register for MoveToFinished but instead uses its own logic to decide when to move to next waypoint. This would avoid waiting for the dealyed event.

Note that movetofinish has a stutter, it would not be suitable.

[awry_y (Charlotte)]

Ah, wait I am stupid.

Basically for such a thing you need to move the rig to the player directly rather than using pathfinding service to do the computing.

So in simple terms:

• Cast a ray before you use pathfinding service and around every 5th node towards the player to see if the player is in direct sight.
• Use a while loop and use NPC.Humanoid:MoveTo(Player.RootPart.Position).
• Problem solved.

[mrcrablolxqqq (tea)]

how do i cast a “ray”? i never actually knew what a ray is in scripting

And also, sorry for late reply, didnt check forum…

[awry_y (Charlotte)]

Use google. Google raycasting on roblox and t would show you how to do it.

[kaya1233333 (NaOH)]

Hu- How do you use Google for raycasting? (nvm i have 0 iq i didnt read the sentence properly )

[awry_y (Charlotte)]

Learn Raycasting in 7 minutes - Advanced Roblox Scripting

Raycasting | Documentation - Roblox Creator Hub

Understanding Raycasting

I originally wrote this as a solution for this post, but since I did spend like half my lifespan and brain cells to create this, thought I’d share it with everybody. Let’s just start off by explaining what a raycast even is. A raycast lets you get the data of whatever is first hit when “casting a ray” from a point in a direction. Think of it like shooting a projectile from a point in a direction and getting the data of what stops the projectile. Raycasts work as long as the direction “reaches” …

Full Guide to Roblox Raycasting - 2024

My Intro to Raycasting - WHAT, WHY, and HOW

My Intro to Raycasting Hello, and today I will teach you how to use raycasting, as well as many common use cases of it in Roblox development. Raycasting is a big part of scripting. Raycasting - WHAT, WHY, and HOW WHAT What is raycasting? Well, Raycasting is making a line between two points and seeing what object the line intersects with first on it’s travel. Well, here is the basics of how it works: local origin = Vector3.new(0,0,0) local direction = Vector3.new(0,10,0) local raycastResult …

What is a RAYCAST?

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Get reading.

[mrcrablolxqqq (tea)]

bruh i just found out u dont even need pathfinding for following a player…
i just did:

while task.wait() do
local target=FindTarget()
if target then
hum:MoveTo(target.Position, target)
end
end

no errors, no looking away, perfect ai.

BugFixed.mp4

[awry_y (Charlotte)]

Yes but the issue is that now if you move behind an object, the AI breaks. I recommend using my method.