How to throw a part in the direction the player is facing

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1

Heya y’all!
I’ve been working on a prototype to hopefully get better with the physics in Roblox, and making parts throwable. Initially, I wanted to make the part be thrown in the direction the player’s mouse is looking at. But I keep getting an error and I don’t necessarily know how to fix this.

Any help is greatly appreciated and I hope y’all have a great day!!!

image

Script:

local RS = game:GetService("ReplicatedStorage")

local ThrowEvent = RS.Events.ThrowPart

ThrowEvent.OnServerEvent:Connect(function(player, Tool)
	local Char = player.Character
	local Mouse = player:GetMouse()
	
	local ClonePart = RS.Parts:FindFirstChild(Tool.Name):Clone()
	ClonePart.Size = Vector3.new(1,1,1) * Tool.Size.Value
	ClonePart.Parent = workspace.Parts
	
	--local pos1 = workspace.From.Position
	--local pos2 = workspace.To.Position
	local pos1 = Char.Head.Position
	local pos2 = Mouse.Hit.Position
	local dir = pos2 - pos1
	local dur = math.log(1.001 + dir.Magnitude * 0.01)
	
	pos2 = Char.HumanoidRootPart.CFrame.LookVector * dur
	dir = pos2 - pos1
	
	local force = dir / dur + Vector3.new(0, game.Workspace.Gravity * dur / 2, 0)
	
	ClonePart.Position = pos1
	--ClonePart.AssemblyLinearVelocity = force
	ClonePart:ApplyImpulse(force * ClonePart.AssemblyMass)
	ClonePart:SetNetworkOwner(nil)
	
	Tool:Destroy()
end)
2

Player.Mouse can only be read from by the client
You’ll have to fire Hit as an argument in the :FireServer
Forgot to mention, Mouse is depreciated
You should be manually raycasting with Camera:ViewportPointToRay and UserInputService functions

2 Likes
3

How would I necessarily go about doing that?
An example would help out greatly!

4 
local UserInputService = game:GetService('UserInputService')

local function GetMousePosition()
	local Camera = workspace.CurrentCamera
	local MouseLocation = UserInputService:GetMouseLocation()
	local MouseRay = Camera:ViewportPointToRay(MouseLocation.X, MouseLocation.Y, 1)
	local Result = workspace:Raycast(MouseRay.Origin, MouseRay.Direction * 2500)
	if Result then
		return Result.Position
	else
		return MouseRay.Origin + MouseRay.Direction * 2500
	end
end

You can also construct a CFrame with CFrame.lookAt

5

So I typed in this function into the local script that fires the ThrowEvent and added a variable into the event function for the mouse’s position. My problem now is the sometimes the part will be thrown the opposite direction of where the mouse is.

ThrowEvent.OnServerEvent:Connect(function(player, Tool, MousePos)
	local Char = player.Character
	
	local ClonePart = RS.Parts:FindFirstChild(Tool.Name):Clone()
	ClonePart.Size = Vector3.new(1,1,1) * Tool.Size.Value
	ClonePart.Parent = workspace.Parts
	
	--local pos1 = workspace.From.Position
	--local pos2 = workspace.To.Position
	local pos1 = Char.Head.Position
	local pos2 = MousePos
	local dir = pos2 - pos1
	local dur = math.log(1.001 + dir.Magnitude * 0.01)
	
	pos2 = MousePos * dur
	dir = pos2 - pos1
	
	local force = dir / dur + Vector3.new(0, game.Workspace.Gravity * dur / 2, 0)
	
	ClonePart.Position = pos1
	--ClonePart.AssemblyLinearVelocity = force
	ClonePart:ApplyImpulse(force * ClonePart.AssemblyMass)
	ClonePart:SetNetworkOwner(nil)
	
	Tool:Destroy()
end)
6

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