Velocities, detecting them, and checking how large they are

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#1

What I want is to check velocities of parts flying through the air
This way I can
-Make them do nothing to the player if it’s too slow
-Make them stick into the player if they’re going fast enough
-Make them instantly kill the player if they’re going really fast

How would I go about doing this?

I have my current code written here as a base but it doesn’t really work so

local player = game.Players.LocalPlayer

local character = player.Character or player.CharacterAdded:Wait()

character:WaitForChild("Humanoid").Touched:Connect(function(touchedPart, bodyPart)
	local vel = touchedPart.AssemblyLinearVelocity
	if vel.X > 50 or vel.Y > 50 or vel.Z > 50 or vel.X < -50 or vel.Y < -50 or vel.Z < -50 then
		game.ReplicatedStorage.remote:FireServer(touchedPart)
	end
end)

in startercharacterscripts

#2

Are you using any BodyMovers for the part to move? Also put wait() inside the loop so it wont get laggy.

#3

im an idiot i posted the wrong code

just changed it have another look

and no im not using body movers, im just testing it in studio with the move tool and i can see the assemblylinearvelocity changing so

#4

Is the AssemblyLinearVelocity changing when printing?

#5

yeah, and even when it goes above 50 i dont die

#6

Vectors have a property called Magnitude which represents the length of the vector. It’s basically a scalar. You can use it to detect the speed of an object.

If Velocity.Magnitude > 50 then
1 Like
#7

ill try this, thanks… ill be right back…

#8

heres the new code, anything seem wrong with it before i test it?

local player = game.Players.LocalPlayer

local character = player.Character or player.CharacterAdded:Wait()

character:WaitForChild("Humanoid").Touched:Connect(function(touchedPart, bodyPart)
	local vel = touchedPart.AssemblyLinearVelocity
	if math.abs(vel.Magnitude) > 5 then
		game.ReplicatedStorage.remote:FireServer(touchedPart)
	end
end)

(the remote event is just saying to kill the player and delete the part on the server, i dont think i need to do the player kill part on the server but whatever)

#9

Seems like it could work, also make sure the server side works as well!

#10

which part in my case would be the server side?

#11

Also, if the part stops when it touches the character, there’s a chance that the .Touched() detects 0 magnitude.

#12
  1. i thought there was a chance that happened
  2. if thats the case, how do i account for this?
#13

Actually you don’t need math.abs Since Magnitude represents the length of the Vector it cannot be negative.

Magnitude is basically distance or length. Thats how I like to think of it.

#14 
game.ReplicatedStorage.remote:FireServer(touchedPart)
#15

oh… i see, thanks a ton ill change that now

#16

all that does is destroy the part and kill the player

if i kill the player in a local script, does that kill the player for everyone or just the player
like do i have to kill them on the server

#17

It should kill the player and since the player character replicates to the server, everyone should see the player dies.

So killing the player in LocalScript should work.

#18

alright got it

also my previous question, if the problem is the touched detecting the 0 when it stops when it hits the player, how do i fix that?

#19

Probably setting CanCollide to false.

#20

One last thing to note Im not sure Humanoid has a Touched event. You may want to use the HumanoidRootPart