Speed detector for a car?

So I'm trying to make a "Speed detector" for cars that go over the speed limit, if they touch the part and are over the speed limit they get a fine for speeding (100 HRK). Everything works except when I want to check the speed, I'm not sure how to do it. I use the A-Chassis System for my cars. Also, I'm unsure if I can check the WalkSpeed if the player is sitting.

How can I fix this or how can I make the Speed detector, it's really important and it means a lot to me if you help me out. Thanks!

db = false
script.Parent.Touched:Connect(function(hit)
	if hit.Parent:FindFirstChild("Humanoid") then
		local player = game.Players:GetPlayerFromCharacter(hit.Parent)
		if db == false then
			db = true
			script.Parent.BrickColor = BrickColor.new("Bright red")
			player.leaderstats.HRK.Value = player.leaderstats.HRK.Value - 100
			wait(3)
			script.Parent.BrickColor = BrickColor.new("Bright green")
			db = false
		end
	end
end)

AnonymousAug 20, 2022Edited Aug 20, 2022

✓ Accepted answer

VehicleSeats have a velocity property which then you can get the magnitude by doing...

Velocity.Magnitude

The returned value will be the speed that the car seat is driving at. Here's an example.

local db = false
workspace.Part.Touched:Connect(function(p)
	if p.Parent:FindFirstChildWhichIsA("Humanoid") then
		if db == false then
			db = true
			local hrp = p.Parent.HumanoidRootPart -- in this scenario i'll use the humanoid root part as an example.
			local magnitude = hrp.Velocity.Magnitude -- this will return the players walkspeed.
			
			if magnitude > 16 then
				print("players walkspeed is over 16.")
				db = false
				else db = false
			end
		end
	end
end)

Learn more about magnitude here.

Here's the script you were asking for. Put it inside of a part. There are many ways to tweak this, like putting names into a module and using Region3s to reduce the amount of objects, but this should work perfectly fine for now. Good luck on your game and learning scripting!

local scan = script.Parent
local eligblenames = {"Chassis"} -- your table to store car names.
local speedlimit = 20


local debounce = false
scan.Touched:Connect(function(p)
	if table.find(eligblenames, p.Parent.Name) then -- using table.find to check if the name of the parts parent exists in the table, returns true if the name matches any of the names in the table.
		if debounce == false then
			debounce = true
			local magnitude = p.Velocity.Magnitude -- getting the magnitude
			if magnitude >= speedlimit then
				--distribute ticket to the player
				print('ticked distributed')
				wait(20) -- wait time before distrubuting another ticket, makes sure they wont get flooded by any
				debounce = false
				else debounce = false
			end
		end
	end
end)

AnonymousAug 21, 2022Edited Aug 21, 2022Permalink

11 comments

Hey, The script doesn't work for players that are inside the car and for players that are normally walking over 16.

AnonymousAug 21, 2022#

It worked fine for me, and for the cars, I recommend instead of trying to get the player inside of the car, you can get the magnitude of the car or any part of the car.

AnonymousAug 21, 2022#

How can i do that? Im new to scripting, so most of the times stuff makes almost no sense to me, haha ;')

AnonymousAug 21, 2022#

You could do something similar to what I did. Use a Part Touched event and check if the part that touched it is a child of a car. This could be done through many ways like getting the name, having a indicator inside the car, etc. Once you've detected it is a car get the magnitude of any part or the vehicle seat by doing [part name].Velocity.Magnitude. If the magnitude is over a specific amount (1)

AnonymousAug 21, 2022#

, they would get a speeding ticket. You could also learn about Region3s and set up specific regions in which a player could get a ticket for speeding in specific areas, but I'm getting side tracked.

AnonymousAug 21, 2022#

I'll see if I can make a script for you to look at.

AnonymousAug 21, 2022#

Hmm, im not really understanding most of this sadly.. Is there any way you could possibly create another script for me? I'm new to the scripting, and i can make more "advanced" scripts with the help of youtube tutorials. + There is almost 0 videos on how to do a speed detector for a car. It would really mean a lot to me if i got it working, since its the part of the game im working on.

AnonymousAug 21, 2022#

Please see my updated post.

AnonymousAug 21, 2022#

Hey, so the "local eligblenames = {"Chassis"} -- your table to store car names." Is the Chassis part a folder, since its not the same name for me?

AnonymousAug 21, 2022#

No, its a table. You can put the name of the car in there, separated by a comma, for example, “local eligiblecars = {“Chassis”, “Ford F150”}”. I recommend learning about tables.

AnonymousAug 21, 2022#

Works, ty :) <3

AnonymousAug 21, 2022#

1 answer

11 comments