How to make spread for raycast?

Help and Feedback Scripting Support
#1

I want to make a spread for my raycast weapons, but I haven’t really figured out how to do it yet.
I want to make it so that when the player shoots, the spread increases and the camera wobbles, but I have no idea how to do this.

Local script:

local tool = script.Parent
local Ammo = tool:WaitForChild("Ammo")
local MaxAmmo = tool:WaitForChild("MaxAmmo")
local isReloading = false

tool.Fire.OnServerEvent:Connect(function(player, mouseHit, rate)
	if script.Parent.CanFire.Value == false then
		script.Parent.CanFire.Value = true
		Ammo.Value = Ammo.Value - 1
		local fires = tool.Handle.Fire:Clone()
		fires.Parent = tool.Handle
		fires:Play()
		local ray = Ray.new(tool.Handle.GunFirePoint.WorldCFrame.p, (mouseHit.p - tool.Handle.GunFirePoint.WorldCFrame.p).unit * 300)
		local hit, position, normal = game.Workspace:FindPartOnRay(ray, player.Character, false, true)
		local distance = (position - tool.Handle.GunFirePoint.WorldCFrame.p).magnitude
		local part = Instance.new("Part")
		part.Name = "Bullet"
		part.Anchored = true
		part.CanCollide = false
		part.Material = "Neon"
		part.BrickColor = BrickColor.new("Gold")
		part.Size = Vector3.new(0.1, 0.1, distance)
		part.CFrame = CFrame.new(position, tool.Handle.GunFirePoint.WorldCFrame.p) * CFrame.new(0, 0, - distance / 2)
		part.Parent = workspace
		if hit and hit.Parent ~= workspace.BulletHoles then
			if hit.Parent and hit.Parent ~= workspace.BulletHoles then

					local hole = game.ReplicatedStorage.Concrete:Clone()
					hole.Name = "Bullet Hole"
					hole.Parent = workspace.BulletHoles
					hole.Position = mouseHit.p
					hole.CFrame = CFrame.new(position, position + normal)

					local weld = Instance.new("Weld")
					weld.Part0, weld.Part1 = hit,hole
					weld.C0 = hit.CFrame:Inverse()
					weld.C1 = hole.CFrame:Inverse()
					weld.Parent = hole

					game:GetService("Debris"):AddItem(hole, 8)
					if hit.Parent:FindFirstChild("Humanoid") and hit.Name == "Head"  then
						hole:Destroy()
						hit.Parent.Humanoid:TakeDamage(math.random(137,168))
					end
					if hit.Parent:FindFirstChild("Humanoid") then
						hole:Destroy()
						hit.Parent.Humanoid:TakeDamage(math.random(34,63))
					elseif hit.Parent:FindFirstChild("Humanoid") and hit.Name == "Left Leg" or hit.Name == "Right Leg" then
						hole:Destroy()
						hit.Parent.Humanoid:TakeDamage(math.random(23,45))
				end
			end
		end
		game:GetService("Debris"):AddItem(part, 0.03)
	end
	wait(rate)
	script.Parent.CanFire.Value = false
end)

local reloadSound = tool.Handle.Reload

local function reload()
	if isReloading == false and Ammo.Value < MaxAmmo.Value then
		script.Parent.CanFire.Value = true
		reloadSound:Play()
		isReloading = true
		wait(2)
		isReloading = false
		script.Parent.CanFire.Value = false
		tool.Ammo.Value = MaxAmmo.Value
	end
end

tool.Reloading.OnServerEvent:Connect(reload)
tool.Unequipped:Connect(function()
	isReloading = false
end)

Server script:

local tool = script.Parent
local Ammo = tool:WaitForChild("Ammo")
local MaxAmmo = tool:WaitForChild("MaxAmmo")
local isReloading = false

tool.Fire.OnServerEvent:Connect(function(player, mouseHit, rate)
	if script.Parent.CanFire.Value == false then
		script.Parent.CanFire.Value = true
		Ammo.Value = Ammo.Value - 1
		local fires = tool.Handle.Fire:Clone()
		fires.Parent = tool.Handle
		fires:Play()
		local ray = Ray.new(tool.Handle.GunFirePoint.WorldCFrame.p, (mouseHit.p - tool.Handle.GunFirePoint.WorldCFrame.p).unit * 300)
		local hit, position, normal = game.Workspace:FindPartOnRay(ray, player.Character, false, true)
		local distance = (position - tool.Handle.GunFirePoint.WorldCFrame.p).magnitude
		local part = Instance.new("Part")
		part.Name = "Bullet"
		part.Anchored = true
		part.CanCollide = false
		part.Material = "Neon"
		part.BrickColor = BrickColor.new("Gold")
		part.Size = Vector3.new(0.1, 0.1, distance)
		part.CFrame = CFrame.new(position, tool.Handle.GunFirePoint.WorldCFrame.p) * CFrame.new(0, 0, - distance / 2)
		part.Parent = workspace
		if hit and hit.Parent ~= workspace.BulletHoles then
			if hit.Parent and hit.Parent ~= workspace.BulletHoles then

					local hole = game.ReplicatedStorage.Concrete:Clone()
					hole.Name = "Bullet Hole"
					hole.Parent = workspace.BulletHoles
					hole.Position = mouseHit.p
					hole.CFrame = CFrame.new(position, position + normal)

					local weld = Instance.new("Weld")
					weld.Part0, weld.Part1 = hit,hole
					weld.C0 = hit.CFrame:Inverse()
					weld.C1 = hole.CFrame:Inverse()
					weld.Parent = hole

					game:GetService("Debris"):AddItem(hole, 8)
					if hit.Parent:FindFirstChild("Humanoid") and hit.Name == "Head"  then
						hole:Destroy()
						hit.Parent.Humanoid:TakeDamage(math.random(137,168))
					end
					if hit.Parent:FindFirstChild("Humanoid") then
						hole:Destroy()
						hit.Parent.Humanoid:TakeDamage(math.random(34,63))
					elseif hit.Parent:FindFirstChild("Humanoid") and hit.Name == "Left Leg" or hit.Name == "Right Leg" then
						hole:Destroy()
						hit.Parent.Humanoid:TakeDamage(math.random(23,45))
				end
			end
		end
		game:GetService("Debris"):AddItem(part, 0.03)
	end
	wait(rate)
	script.Parent.CanFire.Value = false
end)

local reloadSound = tool.Handle.Reload

local function reload()
	if isReloading == false and Ammo.Value < MaxAmmo.Value then
		script.Parent.CanFire.Value = true
		reloadSound:Play()
		isReloading = true
		wait(2)
		isReloading = false
		script.Parent.CanFire.Value = false
		tool.Ammo.Value = MaxAmmo.Value
	end
end

tool.Reloading.OnServerEvent:Connect(reload)
tool.Unequipped:Connect(function()
	isReloading = false
end)

(Please make a script and explain the lines to me. I don’t know much programming)

1 Like
#2

In raytracing to produce a spread of rays we have a value from -0.5 to 0.5 (uv) which is basically just the pixel position / the resolution - 0.5. Then we say that the direction is equal to

(Vector3.new(uv.x*spread, uv.y*spread, 1).Unit*range)

You don’t have to go through each pixel, but rather have a resolution value in a sense then for loop that. Say we have 20 resolution to derive uv I do

for x=1,20 do
  for z=1,20 do
    local uv = Vector2.new(x/20, z/20)
  end
end
2 Likes
#3

I didn’t really understand how this can be added to the script because I don’t have a local spread and local range.
Please do this in my script, so that I understand what else needs to be added to the script, it is clear in principle, but it is not clear how to add it to the script.
Thanks.

#4 
local tool = script.Parent
local Ammo = tool:WaitForChild("Ammo")
local MaxAmmo = tool:WaitForChild("MaxAmmo")
local isReloading = false

tool.Fire.OnServerEvent:Connect(function(player, mouseHit, rate)
	if script.Parent.CanFire.Value == false then
		script.Parent.CanFire.Value = true
		Ammo.Value = Ammo.Value - 1
		local fires = tool.Handle.Fire:Clone()
		fires.Parent = tool.Handle
		fires:Play()
		for x=1,20 do
  for z=1,20 do
    local uv = Vector2.new((x/20)-0.5, (z/20)-0.5)
    local originOfRay = tool.Handle.GunFirePoint.WorldCFrame.p
    local spread = 5
    local firstComp = mouseHit.p+Vector3.new(uv.x*spread, uv.y*spread, 1).unit
    local direction = (firstComp - tool.Handle.GunFirePoint.WorldCFrame.p) --Vectors can be created from 2 points, say the origin of where that vector is is the thing you are subtracting and the place your vector points to is the first part.

		local ray = Ray.new(tool.Handle.GunFirePoint.WorldCFrame.p, direction.unit * 300)

		local hit, position, normal = game.Workspace:FindPartOnRay(ray, player.Character, false, true)
		local distance = (position - tool.Handle.GunFirePoint.WorldCFrame.p).magnitude
		local part = Instance.new("Part")
		part.Name = "Bullet"
		part.Anchored = true
		part.CanCollide = false
		part.Material = "Neon"
		part.BrickColor = BrickColor.new("Gold")
		part.Size = Vector3.new(0.1, 0.1, distance)
		part.CFrame = CFrame.new(position, tool.Handle.GunFirePoint.WorldCFrame.p) * CFrame.new(0, 0, - distance / 2)
		part.Parent = workspace
		if hit and hit.Parent ~= workspace.BulletHoles then
			if hit.Parent and hit.Parent ~= workspace.BulletHoles then

					local hole = game.ReplicatedStorage.Concrete:Clone()
					hole.Name = "Bullet Hole"
					hole.Parent = workspace.BulletHoles
					hole.Position = mouseHit.p
					hole.CFrame = CFrame.new(position, position + normal)

					local weld = Instance.new("Weld")
					weld.Part0, weld.Part1 = hit,hole
					weld.C0 = hit.CFrame:Inverse()
					weld.C1 = hole.CFrame:Inverse()
					weld.Parent = hole

					game:GetService("Debris"):AddItem(hole, 8)
					if hit.Parent:FindFirstChild("Humanoid") and hit.Name == "Head"  then
						hole:Destroy()
						hit.Parent.Humanoid:TakeDamage(math.random(137,168))
					end
					if hit.Parent:FindFirstChild("Humanoid") then
						hole:Destroy()
						hit.Parent.Humanoid:TakeDamage(math.random(34,63))
					elseif hit.Parent:FindFirstChild("Humanoid") and hit.Name == "Left Leg" or hit.Name == "Right Leg" then
						hole:Destroy()
						hit.Parent.Humanoid:TakeDamage(math.random(23,45))
				end
			end
		end
		game:GetService("Debris"):AddItem(part, 0.03)
		  end
end
	end
	wait(rate)
	script.Parent.CanFire.Value = false
end)

local reloadSound = tool.Handle.Reload

local function reload()
	if isReloading == false and Ammo.Value < MaxAmmo.Value then
		script.Parent.CanFire.Value = true
		reloadSound:Play()
		isReloading = true
		wait(2)
		isReloading = false
		script.Parent.CanFire.Value = false
		tool.Ammo.Value = MaxAmmo.Value
	end
end

tool.Reloading.OnServerEvent:Connect(reload)
tool.Unequipped:Connect(function()
	isReloading = false
end)

Note: I havent tested this so some kid might be like “no, that is definitely not how you would do it” seeing as you use deprecated methods.

#5

Im not good programmer, im teached by old tutorials.

#6

That’s why I’m asking you to do it in my script, because I don’t know much about it and I learned from old tutorials… I won’t blame you if it doesn’t work. I learn from mistakes.