Vehicle acceleration script

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#1

I am creating a cart ride game and I’m using a custom script combined with the vehicle seat. As of right now the acceleration and braking is instant and instead of rolling to a stop when nothing is being pressed down, the cart acts like it is braking. How can I make the acceleration/braking smooth and also have the cart roll to a stop when not pressing any keys?

My script:

local speed = script.Parent.Speed
local seat = script.Parent.Parent.Parent.Body.VehicleSeat
local maxspeed = seat.MaxSpeed

while true do
	wait(0.1)
	local look = script.Parent.CFrame.lookVector * script.Parent.Speed.Value
	
	if seat.Throttle == 1 then
		script.Parent.BV.velocity = Vector3.new(look.x, 0, look.z)
	elseif seat.Throttle == 0 then
		script.Parent.BV.velocity = Vector3.new(0, 0, 0)
	elseif seat.Throttle == -1 then
		script.Parent.BV.velocity = Vector3.new(-look.x, 0, -look.z)
	end
end
#2

Instead of using a Velocity, you’ll want to use a BodyForce (assuming you’re using the deprecated system)
A velocity is a velocity, set the velocity to 0 and the velocity is 0. Acceleration = Force / Mass, so add force to get acceleration.

2 Likes
#3

Well, besides your problem, I shortened your code.

local speed = script.Parent.Speed
local seat = script.Parent.Parent.Parent.Body.VehicleSeat
local maxspeed = seat.MaxSpeed

while true do
	task.wait(0.1)
	local Look = script.Parent.CFrame.LookVector * script.Parent.Speed.Value

	script.Parent.BV.Velocity = Vector3.new(Look.X * seat.Throttle,0,Look.Z * seat.Throttle)
end

If the throttle is only -1, 0, or 1, then you can multiply the Look variable by it.

A number multiplied by 1 stays the same.
A number multiplied by 0 is 0.
A number multiplied by -1 becomes negative.

So, you don’t need that nasty if statement there.

1 Like
#4

How can I decrease the acceleration and also make it so that you can’t move backwards as fast?

#5

Well, if you were using your original script, you would want to make it so that if the throttle was -1 then you set the velocity to

local Dampening = 0.5
script.Parent.BV.Velocity = Vector3.new(-look.X*Dampening, 0, -look.Z*Dampening)

Or something like that…

#6

And how can I decrease the speed of acceleration, but keep the max speed the same?