How would i add bullet drop to this Ray?

[Tunnells (PlaySage)]

So the title says it all basically lol,
An example of how the gun works right now

i Want the bullets(Ray cast) to do this instead

local origin = Tool.GunTip.Position
				local direction = (MousePos - origin).Unit
				
				local RayCastParams = RaycastParams.new()
				RayCastParams.FilterDescendantsInstances = Player.Character:GetDescendants()
				RayCastParams.FilterType = Enum.RaycastFilterType.Blacklist
				
				local result = workspace:Raycast(Tool.GunTip.Position, direction* 300, RayCastParams)
				if result then
					local BulletHole = game.ServerStorage.ServerAssets.BulletHole:Clone()
					BulletHole.Parent = workspace
					BulletHole.Position = result.Position
					BulletHole.CFrame = CFrame.lookAt(result.Position, result.Position + result.Normal)
					
					
					local Weld = Instance.new("WeldConstraint")
					Weld.Part0 = BulletHole
					Weld.Part1 = result.Instance
					Weld.Parent = BulletHole
					
					Debris:AddItem(BulletHole, 10)

[PersonifiedPizza]

There is some math you’ll need to do this. Lucky, someone did it for you!

Making a combat game with ranged weapons? FastCast may be the module for you!

Hey everybody!

Click to view key information for existing users

The module’s version is currently Ver 13.2.0 released on 12 November 2020** Changelogs can be viewed <a href="https://etithespirit.github.io/FastCastAPIDocs/changelog/">HERE</a> Support will only be given for the current version. Certain public toolkits that include FastCast may be using an out of date version. Please check the version in the main module (a comment near the top) before asking for help.

In thi…

---

Basically, gravity is a type of acceleration. So you’ll add some downwards acceleration per every second. You can integrate that to get this equation:

change in x = initial velocity * time + 0.5 * acceleration * time * time

You can just loop through doing raycasts until it hits something or hits a predefined limit (number of raycasts, distance, etc).

[Tunnells (PlaySage)]

I dont really like open sourced modules lol, i wanna have all my scripts, local scripts to be owned by be

[PersonifiedPizza]

You can copy the source code. FastCast is used by hundreds of games (one of the most used modules on the forums probably).

You can also use that equation I posted every heartbeat (or with no delays for something hitscan-like).

[ThanksRoBama (Emma)]

Here’s a really simple version that you can work from:

-- Bullet ModuleScript
local RunS = game:GetService("RunService")

local MAX_LIFETIME = 5 --seconds
local GRAVITY = Vector3.new(0, -game.Workspace.Gravity, 0) --studs/second^2
local HIT_DETECT_RAYCAST_PARAMS = RaycastParams.new() --Set this up how you want it

function newBullet(startPosition, startVelocity)
    local onHitEventObject = Instance.new("BindableEvent")
    local onTimeoutEventObject = Instance.new("BindableEvent")
    local bullet = {
        position = startPosition, 
        velocity = startVelocity,
        onHit = onHitEventObject,
        onTimeout = onTimeoutEventObject,
        lifeTime = 0,
    }
    bullet.updateConnection = RunS.Heartbeat:Connect(function(dt) 
        updateBullet(bullet, dt) 
    end)
    return bullet
end

function updateBullet(bullet, dt)
    --Move the bullet along the parabola
    local oldPosition = bullet.position
    local newPosition = oldPosition + bullet.velocity * dt + GRAVITY * dt * dt

    bullet.position = newPosition
    bullet.velocity = bullet.velocity + GRAVITY * dt

    --Check if the bullet hit something
    local hitResult = hitDetect(oldPosition, newPosition)
    if hitResult then
        bullet.onHitEventObject.Event:Fire(hitResult)
        destroyBullet(bullet)
        return
    end
        
    --Destroy the bullet if it doesn't hit anything
    bullet.lifeTime += dt

    if (bullet.lifeTime > MAX_LIFETIME) then
        destroyBullet(bullet)
    end
end

function hitDetect(pointFrom, pointTo)
    return game.Workspace:Raycast(pointFrom, pointTo - pointFrom, HIT_DETECT_RAYCAST_PARAMS)
end

function destroyBullet(bullet)
    --Removed references to allow garbage collection
    bullet.onHit:Destroy() --Allows BindableEvent to be GC'ed, and breaks any connections to it
    bullet.onTimeout:Destroy() --Same
    bullet.updateConnection:Disconnect()
end

return {
    newBullet = newBullet,
}

-- Gun controller script
local BULLET_SPEED = 100 --studs/second

function shootGun(muzzleCFrame, bulletVelocity)
    local bullet = newBullet(muzzleCFrame.Position, muzzleCFrame.LookVector * BULLET_SPEED)
    bullet.onHit.Event:Connect(function(hitResult)
        local character = hitResult.Instance.Parent
        local humanoid = character:FindFirstChildWhichIsA("Humanoid")
        if humanoid then
            humanoid.Health -= 50
        end
    end)
end

Here’s an illustration explaining the math/physics: