What is a alternate option for body Velcotiy?

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#1

Making an artillery system, and looking for an alternate way, as body Velocity is now deprecated

#2

Linear velocity is what I use now, it uses attachments and stuff, but in my opinion its better.

#3

I’ll look into it, thanks for the help

1 Like
#4

No problem. I can help with your system because I have made something similar if you need it!

1 Like
#5

Could you give me an example of linear velocity being used?

#6

If you are shooting a part from a cannon, add a ton of force and then destroy the linear velocity to give the part realistic drop and speed. It works a lot like body velocity, you just have to play around with it a little.

Download the world in this post, it helped me a lot.
New Body Movers - Updates / Announcements - DevForum | Roblox

I have a YouTube channel and I am going to release my video tutorial on how to make a ship cannon (can be remodeled and scripted to look like arty, HMG, etc) in a day or two. The linear velocity will be explained there.
Four Corners - YouTube

#7 
-- @author lumbergrim
-- @project Artillery System

local Players = game:GetService("Players")


local SPG9 = script.Parent.Parent
local CoreValues = SPG9.CoreVaues
local BackGroundparts = SPG9.BackgroundParts
local Shell = SPG9.Shell
local BarrelBlast = SPG9.BarrelBlast
local MuzzleFlash = SPG9.MuzzleFlash

local seat = SPG9.Seat

function FireTheGun()
	local FiredShell = Shell:Clone()
	
	if CoreValues.IsLoaded.Value == true then
		FiredShell.Transparency = 0
		FiredShell.CFrame = BarrelBlast.CFrame
		FiredShell.Parent = workspace
		FiredShell.CanCollide = false
		FiredShell.Anchored = false
		local BV = Instance.new("LinearVelocity")
		BV.Attachment0 = game.Workspace.Part.Attachment0
		BV.Attachment1 = game.Workspace.Part.Attachment1
		BV.MaxForce = Vector3.new(5000,5000,5000)
		BV.VelocityConstraintMode = Enum.VelocityConstraintMode.Vector
		BV.VectorVelocity = Vector3.new(200,200,200)
	end
end


seat.Changed:Connect(function()
	wait(0.5)
	local Plr = Players:GetPlayerFromCharacter(seat.Occupant.Parent)
	local PlayerChar = Plr.Character
	local mouse = Plr:GetMouse()
	
	FireTheGun()
	
	
	
end)

I am trying to do this, but the part just keeps falling down, even though I’ve set attachments to test + added the force

#8

Attachment0 should be in the shell and you don’t need an Attachment1.

function FireTheGun()
	local FiredShell = Shell:Clone()
	
	if CoreValues.IsLoaded.Value == true then
		FiredShell.Transparency = 0
		FiredShell.CFrame = BarrelBlast.CFrame
		FiredShell.Parent = workspace
		FiredShell.CanCollide = false
		FiredShell.Anchored = false
		local attach = Instance.new("Attachment")
		attach.Parent = FiredShell
		local BV = Instance.new("LinearVelocity")
		BV.Attachment0 = FiredShell.Attachment
		BV.MaxForce = Vector3.new(math.huge, math.huge, math.huge)
		BV.VelocityConstraintMode = Enum.VelocityConstraintMode.World
		BV.VectorVelocity = BarrelBlast.CFrame.LookVector * 600
	end
end

This should work.

#9

World is not a valid member of “Enum.VelocityConstraintMode”, From where you applied the VelocityConstraintMode did you mispell it?

#10

Probably not, you could just delete that line and it should work just fine.

#11

It is still falling through the earth

#12

Could you take a video of the problem?

#13

#14

That means the force is not being exerted on the object. Make the attachment and linear velocity in the part, not the script and clone that.

#15

I see, and the Vector Velocity I just played around with, Would the “vector Velocity” be changed to where the Bullet will go to?

#16

No, its just the velocity.

local muzzle = --the part where your shell spawns
BV.VectorVelocity = muzzle.CFrame.LookVector * 600

This makes the velocity go in the direction the shell is pointing.

#17

I see, Thanks!

(thirtycharacters thiritycharacters)

#18

No problem! Also make a comment solved so other people don’t get confused it the problem is resolved or not!