Trying to get the nearest object

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#1

I am trying to get the nearest point but I get this error: Workspace.xure1.CalculateGrapplingHook:19: attempt to index nil with ‘GetChildren’ on line 23.
I haven’t tried another method because I don’t know why it would say that hook is nil.

Code:

local plr = game.Players.LocalPlayer
local char = plr.Character or plr.CharacterAdded:Wait()
local mouse = plr:GetMouse()

local function getNearestHook()
	local nearest = 0
	local nearestHook = nil
	
	for _, hook in pairs(workspace.Hooks:GetChildren()) do
		if (char.PrimaryPart.Position - hook.PrimaryPart.Position).Magnitude < nearest then
			nearest = (char.PrimaryPart.Positon - hook.PrimaryPart.Position).Magnitude
			nearestHook = hook.PrimaryPart
		end
	end
	
	return nearestHook
end

local function getNearestPoint(hook)
	local nearest = 0
	local nearestPoint = nil
	
	for _, point in pairs(hook:GetChildren()) do
		if (char.PrimaryPart.Position - point.Position).Magnitude < nearest then
			nearest = (char.PrimaryPart.Positon - point.Position).Magnitude
			nearestPoint = point
		end
	end
	
	return nearest, nearestPoint
end

mouse.Button1Down:Connect(function()
	local hook = getNearestHook()
	local nearest, nearestPoint = getNearestPoint(hook)
	
	if nearest <= 7 and nearestPoint then
		game:GetService("ReplicatedStorage").Events:WaitForChild("GrappleEvent")
	end
end)
1 Like
#2

In the getNearestHook function, you are checking if the distance between the character and the hook is less than 0.

#3

Thank you but I still have the same error!

#4

If I try to get the name of the hook it say: attempt to index nil with ‘Name’.

#5

Can you try printing out what the hook variable is supposed to be?

#6

It’s supposed to be a part that you will move forwards to.

#7

It is because getNearestPoint will always return nil. This line:

The magnitude will always be greater than 0, so that if statement will always be false, therefore the nearestPoint will stay nil.

To fix this, replace

local nearest = 0

--Change to this:
local nearest = 999999
#8

That’s what @Pokemoncraft5290 said. The current code is

local plr = game.Players.LocalPlayer
local char = plr.Character or plr.CharacterAdded:Wait()
local mouse = plr:GetMouse()

local function getNearestHook()
	local nearest = 0
	local nearestHook = nil
	
	for _, hook in pairs(workspace.Hooks:GetChildren()) do
		if not nearest == nil then
			if (char.PrimaryPart.Position - hook.PrimaryPart.Position).Magnitude < nearest then
				nearest = (char.PrimaryPart.Position - hook.PrimaryPart.Position).Magnitude
				nearestHook = hook.PrimaryPart
			end
		else
			nearest = (char.PrimaryPart.Position - hook.PrimaryPart.Position).Magnitude
		end
	end
	
	return nearestHook
end

local function getNearestPoint(hook)
	local nearest = 0
	local nearestPoint = nil
	
	for _, point in pairs(hook:GetChildren()) do
		if (char.PrimaryPart.Position - point.Position).Magnitude < nearest then
			nearest = (char.PrimaryPart.Positoin - point.Position).Magnitude
			nearestPoint = point
		end
	end
	
	return nearest, nearestPoint
end

mouse.Button1Down:Connect(function()
	local hook = getNearestHook()
	local nearest, nearestPoint = getNearestPoint(hook)
	
	if nearest <= 7 and nearestPoint then
		game:GetService("ReplicatedStorage").Events:WaitForChild("GrappleEvent")
	end
end)
1 Like
#9

I forgot to update the nearestHook variable!

#10

Now the it prints the hook but I get an error when I print the point’s name.

#11

What’s the error message? And you mean the getNearestHook function returns the correct hook, but the getNearestPoint function isn’t working?

#12

Yeah, the error is

attempt to index nil with 'Name'  -  Client - CalculateGrapplingHook:31
#13

Function:

local function getNearestPoint(hook)
	local nearest = 999999
	local nearestPoint = nil
	
	for _, point in pairs(hook:GetChildren()) do
		if (char.PrimaryPart.Position - point.Position).Magnitude < nearest then
			nearest = (char.PrimaryPart.Positoin - point.Position).Magnitude
			nearestPoint = point
		end
	end
	
	print(nearestPoint.Name)
	return nearest, nearestPoint
end
#14

You included the print statement outside the GetChildren()) loop, resulting in that error

local function getNearestPoint(hook)
	local nearest = 999999
	local nearestPoint = nil
	
	for _, point in pairs(hook:GetChildren()) do
		if (char.PrimaryPart.Position - point.Position).Magnitude < nearest then
			nearest = (char.PrimaryPart.Positoin - point.Position).Magnitude
			nearestPoint = point
            print(nearestPoint.Name)
		end
	end
	
	return nearest, nearestPoint
end

Try this instead

#15

Now it doesn’t print anything.

#16

And the hook has children? Could you add the following prints and see what it says:

local function getNearestPoint(hook)
	local nearest = 999999
	local nearestPoint = nil
	
	for _, point in pairs(hook:GetChildren()) do
        print(nearest, (char.PrimaryPart.Position - point.Position).Magnitude)
		if (char.PrimaryPart.Position - point.Position).Magnitude < nearest then
            print("Made it past the if statement")
			nearest = (char.PrimaryPart.Positoin - point.Position).Magnitude
			nearestPoint = point
		end
	end
	
	print(nearestPoint.Name)
	return nearest, nearestPoint
end
#17

It still doesn’t print anything.

#18

Does the hook even have children?

#19

image

#20

If it isn’t printing anything then it isn’t registering that the hook has children. If you printed the following, does it print an empty table or does or print a list of the children?

print(hook:GetChildren())