Trying to cap boat speed

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#1

right now, i added thrust to my boat; i’m just unaware as to how i can cap the speed of my boat.
the max speed i want is from the vehicleseat’s maxSpeed property. ty!

function boat:HandleThrust()
	local rs = game:GetService("RunService")
	
	if not self.connection then
		self.connection = rs.Heartbeat:Connect(function(dt)
			if self.vehicleSeat.ThrottleFloat ~= 0 then
				if not self.startTime then
					self.startTime = tick()
				end
				self.currentTime = tick() - self.startTime
				self.thrust.Force = Vector3.new(self.vehicleSeat.ThrottleFloat * self.currentTime * self.TotalMass, 0, 0) * self.vehicleSeat.CFrame.LookVector
				self.velocityMagnitude = self.thrust.Force.Magnitude / self.TotalMass
			else
				self.startTime = nil
				self.currentTime = nil
				self.thrust.Force = Vector3.zero
			end
			
			print("thrust: ", self.thrust.Force)

		end)
	end
end
2 Likes
#2

Look into math.clamp

2 Likes
#3

I second this, additionally this thread is a bit old, but might have some nuggets you’ll find useful.

1 Like
#4

the thrust of the boat is the length of the thrust vector thrust.Force.Magnitude
if its greater than the maxSpeed property than you can normalize it and then multiply with thrust.Force = thrust.Force.Unit * maxSpeed

1 Like
#5

tysm!!! i actually did stumble across that post a few weeks ago. i have to understand it a bit tho haha

#6

ive used math.clamp before but i wouldnt really know how to implement it in my situation tbh

#7

hey man,
tysm for ur help! i took your suggestion and did something myself. the thing is is that when i printed out the
thrust.force.Magnitude, it was printing quite a large number as the boat accelerated more and more like so:

image

i did something of my own and it does cap the speed however, the vector force flickers. i assume its because of the else statement overriding the force and stuff. its hard to explain. i made a video to show the force of the thrust when it hits max speed.

			if math.abs(self.vehicleSeat.AssemblyLinearVelocity.X) >= self.vehicleSeat.MaxSpeed then
					self.thrust.Force = self.thrust.Force.Unit
				else
					self.thrust.Force = Vector3.new(self.vehicleSeat.ThrottleFloat * self.currentTime * self.TotalMass, 0, 0) * self.vehicleSeat.CFrame.LookVector
				end
#8

i think this is easier if you just clamp the time

--sets to the smallest number between itself and maxspeed, so if it goes over the maxspeed then it is equal to the max speed
--also have to adjust maxspeed since its in terms of time now
self.currentTime = math.min(self.currentTime, self.vehicleSeat.MaxSpeed) 
self.thrust.Force = Vector3.new(self.vehicleSeat.ThrottleFloat * self.currentTime * self.TotalMass, 0, 0) * self.vehicleSeat.CFrame.LookVector
1 Like
#9

i’ve spent around 2-3 days researching on how to cap the speed with vectorforce but it’s a bit too advanced for me at the moment.

i used linearvelocity instead and it works now thanks to this video and to happy for contributing so i could clamp the time for more realistic acceleration!

function boat:HandleThrust()
	local rs = game:GetService("RunService")

	if not self.connection then
		self.connection = rs.Heartbeat:Connect(function(dt)
			if self.vehicleSeat.ThrottleFloat ~= 0 then
				if not self.startTime then
					self.startTime = tick()
				end
				
				self.currentTime = math.min(tick() - self.startTime, self.vehicleSeat.MaxSpeed)
				self.thrust.LineVelocity = self.vehicleSeat.ThrottleFloat * self.currentTime
				print("CurrentTime: "..self.currentTime)

			else
				self.startTime = nil
				self.currentTime = nil
				self.thrust.LineVelocity = 0
			end
		end)
	end
end
#10

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