Physic based Rocket path following

Help and Feedback Scripting Support
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1

Hello.
I got a Rocket.

I already have the starting Logic, but currently after that it just shoots straight up in the sky [right rocket]. The left Rocket only has the start logic and is slower.

Because the left on eshould follow a path I already created

for i = 0, numPoints do
		local t = i / numPoints
		local point = Bezier(t, modifiedStartPos, B, Target) -- a math function defined above
		table.insert(curvePoints, point)
        --Visualisation or maybe smt I need idk
		local p = Instance.new("Attachment")
		p.Name = "Attachment"..tostring(i)
		p.Position = point
		p.Parent = workspace
		p.Visible = true
	end

Now I want to apply the VectorForce or LinearVelocity, so that it flys to the next point.
I also added a AlignOrientation.
But at the moment I am not able to align the rocket right and get it so it wont go to high etc.

I also calculated the NukeMass, according to the workspace.Gravity. Thats the minimum Y Force we need to apply so it can fly.

Does anyone know how to get this alignOrientation and Vector Force to apply correctly?

I cant get the AlignmentOrientation to look at the correct angle.

Thanks for your help. If you need more informations just ask me.

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2

Hey, can i see the Bezier function? Just to make sure the point is correctly identified.

3

Sure:

local function Bezier(t, A, B, C)
	return (1-t)^2 * A + 2*(1-t)*t * B + t^2 * C
end

But the points are correct. I just cant get the Rocket to follow them (+ with the right Orientation).

4

Wouldn’t it be easier if you put the nodes into a folder then iterate on it?

local folder = game.Workspace.Folder -- this is the folder with parts that we will use as our nodes

for i, node in pairs(folder:GetChildren()) do
	local p = Instance.new("Attachment", workspace)
	p.Name = "Attachment"..tostring(i)
	p.Position = node.Position
	p.Visible = true
end

-- continue with your original script

Also can i see your entire script with the AlignOrientation and VectorForce logic? That would really help.

1 Like
5

Yea, but it dosnt work. Just the takeof logic.
[When I created the Physical Attachements I only had a debug purpose in mind]

	local Target = Nuke:GetAttribute("Target") -- Vektor 3
	local startPos = Top.Position
	local cruiseHigh = 600
	-- 2. Point on the Bezier. Highes Point in the cruise
	local modifiedStartPos = startPos + Vector3.new(0, 100 , 0)
	local Bx = modifiedStartPos.X + 0.25 * (Target.X - modifiedStartPos.X)
	local Bz = modifiedStartPos.Z + 0.25 * (Target.Z - modifiedStartPos.Z)
	local B = Vector3.new(Bx, cruiseHigh, Bz)
	
	local numPoints = 50
	local curvePoints = {}
	for i = 0, numPoints do
		local t = i / numPoints
		local point = Bezier(t, modifiedStartPos, B, Target)
		table.insert(curvePoints, point)
		local p = Instance.new("Attachment")
		p.Name = "Attachment"..tostring(i)
		p.Position = point
		p.Parent = workspace
		p.Visible = true
	end

	for i, child in ipairs(Nuke:GetChildren()) do
		if child:IsA("BasePart") then
			NukeMass += child.Mass
		end
	end
	
	NukeMass = NukeMass * workspace.Gravity
	local force = Instance.new("VectorForce")
	force.Attachment0 = Instance.new("Attachment", Nuke.Engine)
	force.RelativeTo = Enum.ActuatorRelativeTo.World
	force.Force = Vector3.new(0,0,0)
	force.Enabled = false
	force.ApplyAtCenterOfMass = true
	force.Parent = Nuke
	local align = Instance.new("AlignOrientation")
	align.Attachment0 = Instance.new("Attachment", Nuke.Top)
	align.Attachment1 = workspace.Attachment1
	align.RigidityEnabled = false
	align.Responsiveness = 10
	align.MaxTorque = math.huge
	align.Parent = Nuke.Engine
	align.Mode = Enum.OrientationAlignmentMode.TwoAttachment
	--[[
	align.CFrame = CFrame.fromMatrix(
		Vector3.xAxis,
		-Vector3.yAxis,   
		Vector3.zAxis    
	)]]
	align.AlignType = Enum.AlignType.AllAxes
	align.Enabled = true
	[...]
        Nuke.Engine.AssemblyLinearVelocity = Vector3.new(0,math.random(75,110),0)
        task.wait(0.4)
        force.Force = Vector3.new(0,NukeMass*1.01,0) -
	force.Enabled = true
	--Everything above working finde
        --This down here
       local direction = 0
	local pitch = 0
	--while true do                                
	force.Force = Vector3.new(0,NukeMass*1,0) )
	align.CFrame = CFrame.fromMatrix(   --          
	--Not working in any way
	)

I tried everything, changed the part down there like 20 times and experiemented while Playtesting. Nothing worked

6

Does it show any errors in the Output? Or does it silently fail?

7

It doesn’t work because I’m too stupid to program this physical related thing.

It’s not a bug, it’s my stupidity.

8

try this

local runService = game:GetService("RunService")

local points = --get points here

local i = 1
local a = 0

local startingPoint = points[i]
local goalPoint = points[i + 1]

local connection

connection = runService.Heartbeat:Connect(function(dt)

a += dt

if i > #points then
connection:Disconnect()
return
end

if a => 1 then
a = 0
index += 1
startingPoint = points[i]
goalPoint = points[i+1]
end

local targetCFrame = CFrame.new(startingPoint:lerp(goalPoint, a), goalPoint)

end)
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