How to use ApplyImpulse?

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#1

I’m trying to make a throwable ball but it doesn’t really getting shot out. I want it to shoot out to the direction my HumanoidRootPart is facing. I’m trying to implement this using ApplyImpulse but I don’t really know how to use such thing. I’ve been to the wiki but I didn’t understand anything.

This is what I have so far:

Client:

local tool = script.Parent
local remoteEvent = tool.RemoteEvent

tool.Activated:Connect(function()
	remoteEvent:FireServer()
end)

Server:

local tool = script.Parent
local handle = tool.Handle
local remoteEvent = tool.RemoteEvent

remoteEvent.OnServerEvent:Connect(function(player)
	local character = player.Character or player.CharacterAdded:Wait()
	local rootPart = character:FindFirstChild("RootPart")
	
	local projectile = handle:Clone()	
	
	projectile:ApplyImpulse(Vector3.new(10000,0,0))
	projectile.Parent = workspace
end)
4 Likes
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#2

Last time I checked, it doesn’t work, so just change BasePart.Velocity on the root part BasePart:GetRootPart()

#3

Actually you’ll want BasePart.AssemblyLinearVelocity, since BasePart.Velocity is deprecated and apparently can work a little better than the latter.

3 Likes
#4

I literally said that it doesn’t work. I’ve tried Assembly stuff myself and they didn’t work the last time I checked

1 Like
#5

Works on my machine:

I changed the code up a bit though, you likely have to parent it first though

local tool = script.Parent
local handle = tool:WaitForChild("Handle")
local remoteEvent = tool:WaitForChild("RemoteEvent")

remoteEvent.OnServerEvent:Connect(function(player)
	local character = player.Character or player.CharacterAdded:Wait()
	local rootPart = character:FindFirstChild("RootPart")

	local projectile = handle:Clone()	
	
	projectile.Parent = workspace
	projectile:ApplyImpulse(Vector3.new(0, 0, 10))
end)

and I used a lower impulse for testing purposes. OP had it at 10k on the X axis, where I have it to 10 on the Z.

2 Likes
#6

Huh. Either they fixed it or BodyForce or NetworkOwnership played a role

1 Like
#7

They just weren’t live, there was no bug. Although the functions have been live for a while now. And I never used a body force or used network ownership?

#8

Uhhh, do you know how to apply the force to the direction the rootPart is looking?

#9

Yes, you can use rootPart.CFrame.LookVector as the impulse then multiply it by some scalar for more force

2 Likes
#10

Did I miss anything?

local tool = script.Parent
local handle = tool.Handle
local remoteEvent = tool.RemoteEvent

remoteEvent.OnServerEvent:Connect(function(player)
	local character = player.Character or player.CharacterAdded:Wait()
	local rootPart = character:FindFirstChild("RootPart")
	
	local projectile = handle:Clone()
	
	projectile.Parent = workspace
	
	projectile:ApplyImpulse(rootPart.CFrame.LookVector * 1000)
end)

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image738×83 6.91 KB

#11

You didn’t define it, instead write character.PrimaryPart.CFrame.LookVector * 1000

7 Likes
#12

So would this work in a case of propelling the player forwards?

3 Likes
#13

how could you make it so the character is pushed a little upwards too?

#14

i know this is pretty old and im necroposting but just incase he never found out and/ or for future reference im just gonna say, you’d have to create a new vector saying local vector = Vector3.new(character.PrimaryPart.CFrame.LookVector.X, --insert y here, character.PrimaryPart.CFrame.LookVector.Z and after that write projectile:ApplyImpulse(vector * 1000)

1 Like