So Path.Blocked doesnt work... Is there a way around it?

Question

So I was working with the pathfinding service and everything was going fine... until I realized that Path.Blocked apparently doesn't work correctly! As a result, I've been trying to find a way around this. I came up with a solution of maybe making lines through the waypoints and checking for a touched event or something? I'm not sure how I'd do that though. If you have any ideas I'm all ears!

Here is my code - it needs to create a new path if a part blocks the path....

--Pahfinding service
local pathfinding = game:GetService("PathfindingService")
--Settings for the path
local obHorSep = 3
local obVerSep = 5
--Variables for storing the waypoints and the current waypoint index
local waypoints
local curWayIndex
--Variables for npc, npc humanoid, the object, and the destination.
local npc
local npcHum
local part
local destination
--Stores if the npc is moving
local moving = false
--Creates Path
function createPath()
	--Creates the path type
	local path = pathfinding:CreatePath({AgentRadius=obHorSep,AgentHeight=obVerSep})
	--Creates path between points
	path:ComputeAsync(npcHum.RootPart.Position,destination)
	path:ComputeAsync(npcHum.RootPart.Position,destination)
	--Checks if the path was successfully made
	if path.Status == Enum.PathStatus.Success then
		waypoints = path:GetWaypoints() --Gets waypoints
		--Sets the index to the start
		curWayIndex = 1
		--Starts movement
		moving = true
		npcHum:MoveTo(waypoints[curWayIndex].Position)
		--After first movement, the moveToFinish will complete the rest
	else
		--Path was not successfully made
	end
	--Connects pathBlocked for if the path gets blocked
	path.Blocked:Connect(pathBlocked)
	local color = BrickColor.Random()
	for _, v in pairs(waypoints) do
		local ball = Instance.new("Part",workspace)
		ball.Size = Vector3.new(1,1,1)
		ball.BrickColor = color
		ball.Shape = Enum.PartType.Ball
		ball.Material = Enum.Material.Neon
		ball.Anchored = true
		ball.Position = v.Position
		ball.CanCollide = false
	end
end
--Sets values
function setValues(npc1,part1)
	--Makes the values public
	npc = npc1
	part = part1
	--Finds npc humanoid
	for _,v in pairs(npc:GetDescendants()) do
		--Checks if descendant is humanoid
		if v:IsA("Humanoid") then
			--Sets the public npcHum value to the humanoid
			npcHum = v
			--Connects moveToFinish to npcHum so it reached next waypoint.
			npcHum.MoveToFinished:Connect(moveToFinish)
			break
		end
	end
	--Finds the destination depending on if it is a model or part
	if part:IsA("Model") then --If part is a model
		if part.PrimaryPart then --Check if it has a primary part
			destination = part.PrimaryPart.position
		else --if model doesn't have primary part
			--Set destination as the first part object in it.
			destination = part:FindFirstChildOfClass("Part").position
		end
	else --If the part isn't a model
		--Just set the destination to the part's position
		destination = part.Position
	end
	createPath()
end
--Runs if path gets blocked!
function pathBlocked(blockIdx)
	print("Oh no! Blockage in the path!")
	--Checks if blockage is behind or ahead.
	if blockIdx > curWayIndex then --It is infront
		print("The blockage is infront, we need to make a new path!")
		--create a new path
		createPath()
	else
		--It is behind and nothing needs to happen
		print("Dont worry, the blockage is behind!")
	end
end
--Runs after the humanoid finishes moving to one waypoint
function moveToFinish(reached)
	--Checks if npc has reached point and hasnt reached endpoint.
	if reached and curWayIndex < #waypoints then
		--Ups waypoint Index
		curWayIndex = curWayIndex+1
		--Moves to next index
		npcHum:MoveTo(waypoints[curWayIndex].Position)
	elseif curWayIndex == #waypoints then
		moving = false
		print("Point Reached!")
	end
end
setValues(script.Parent,workspace.Test.PartSpecial)

Oh also I read about this... https://devforum.roblox.com/t/pathfindingservice-path-blocked-not-firing-why/278379 They seemed to have the same problem as me. There was a kind of solution at the end, but I'm not sure how I'd even do that!

I tried to change it to:

if path.Status == Enum.PathStatus.Success then
		waypoints = path:GetWaypoints() --Gets waypoints
		--Sets the index to the start
		curWayIndex = 1
		--Starts movement
		moving = true
		--START CHECKING FOR VELOCITY CHANGE
		npcHum.RootPart:GetPropertyChangedSignal('Velocity'):Connect(velocityChanged)
		npcHum:MoveTo(waypoints[curWayIndex].Position)
		--After first movement, the moveToFinish will complete the rest
	else

adding this to it:

		--START CHECKING FOR VELOCITY CHANGE
		npcHum.RootPart:GetPropertyChangedSignal('Velocity'):Connect(velocityChanged)

and then I added this function:

--Checks if velocity has gone below 0.1 (not moving)
function velocityChanged()
	print("Changed")
	if(npcHum.RootPart.Velocity.magnitude < 0.1) then
		moving = false
		createPath()
	end
end

Since if it did fire, it would create an infinite loop and moved the connection to here:

for _,v in pairs(npc:GetDescendants()) do
		--Checks if descendant is humanoid
		if v:IsA("Humanoid") then
			--Sets the public npcHum value to the humanoid
			npcHum = v
			--Connects moveToFinish to npcHum so it reached next waypoint.
			npcHum.MoveToFinished:Connect(moveToFinish)
			--START CHECKING FOR VELOCITY CHANGE
			npcHum.RootPart:GetPropertyChangedSignal('Velocity'):Connect(velocityChanged)
			break
		end
	end

But it still won't work?

AnonymousSep 14, 2019Edited Sep 14, 2019

So Path.Blocked doesnt work... Is there a way around it?

2 answers

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