How do i calcluate the mass of an object full of meshparts?

Help and Feedback Scripting Support
#1

Hello I’m making a projectile and I need to calculate the mass of the projectile so it doesn’t go on the ground!

image

Example i wanna do something like this

print(part.Mass)

Output: 100

the script was a dummy script

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#2

Also, I’m not calculating it in a script, I’m doing it on command bar.

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#3

Could you not just loop through and add together the masses of all the objects inside the projectile?

#4

Is this an assembly (eg. held together by welds or some other constraint)?

This might be useful to you:
https://developer.roblox.com/en-us/api-reference/property/BasePart/AssemblyMass

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#5

Yes, its held by welds

– Filling in max –

#6

Also how would i make my hammer constantly spinning in one place. Because if you use CFrame.fromEulerAngles() it will spin around the map. I want it to spin in one place.

This is the source code so it wont be confusing.

local Tool = script.Parent.Parent
local SoundFolder = Tool.Sounds
local ThrewKnife = false
local VectorForce = Tool.VectorForce
local AnimationFolder = Tool.Animations
local RemoteFired = false
local WeldingModule = require(game:GetService("ServerScriptService").WeldingModule)

Tool.Remotes.ThrowShield.OnServerEvent:Connect(
	function(player, position)
		if ThrewKnife == true then
			return
		end
		ThrewKnife = true
		local char = player.Character
		local humanoid = char.Humanoid

		loadAnim = humanoid:LoadAnimation(AnimationFolder:WaitForChild("Throw"))
		loadAnim:Play()

		wait(0.50)
		local projectile = game.ReplicatedStorage.Projectiles.MjolnirProjectile:Clone()
		task.wait()
		VectorForce.Force = Vector3.new(0, workspace.Gravity * projectile.AssemblyMass, 5)
		VectorForce.Attachment0 = projectile.Attachment
		projectile:PivotTo(CFrame.lookAt(Tool.Handle.Position, position))
		projectile.PivotOffset = game.ReplicatedStorage.Projectiles.CAProjectile.PivotOffset
		projectile.Parent = workspace:WaitForChild("Projectiles")

		local direction = position - projectile.Position
		projectile:ApplyImpulse(direction.Unit * projectile.Mass * 200)
		Tool.Handle.Transparency = 1
		for i,v in pairs(Tool.Handle:GetDescendants()) do
			if v:IsA("MeshPart") then
				v.Transparency = 1
			end
		end
		task.wait(1)
		Tool.AlignPosition.Attachment0 = projectile.Attachment
		task.wait(0.5)
		Tool.Remotes.ReturnShield:FireClient(player)
		SoundFolder:WaitForChild("Return"):Play()
		Tool.Handle.Transparency = 0
		for i,v in pairs(Tool.Handle:GetDescendants()) do
			if v:IsA("MeshPart") then
				v.Transparency = 0
			end
		end

		local knockback = Instance.new("BodyVelocity")
		knockback.Parent = player.Character.HumanoidRootPart
		knockback.P = 0
		knockback.MaxForce = Vector3.new(math.huge, 0, math.huge)
		knockback.Velocity = player.Character.HumanoidRootPart.CFrame.lookVector * -25

		game:GetService("Debris"):AddItem(knockback, 0.1)
		game:GetService("Debris"):AddItem(projectile, 0)
		wait(1)
		ThrewKnife = false
	end
)

Don’t mind the code i used lua beautifier because im goofy

#7

Where are you attempting to rotate it?

#8

It will just constantly spin in the place your projectile is going.

#9

I’m not sure I understand sorry, what lines are currently causing this behaviour?

#10

no no no, I meant I would like it to spin constantly wherever your projectile is going. Like thors hammer, It sometimes spins when thrown

#11

Ohhh I get what you mean, try either using :ApplyAngularImpulse, or try a torque:
https://developer.roblox.com/en-us/api-reference/class/Torque

#12

I’ll go try that; I’ll message you if anything goes wrong

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