How can I use the new raycast in Roblox Studio? - roblox

Question

I am trying to learn how to use the Raycast system in Roblox studio, I don't have enough experience in Roblox studio to understand what's going on here, or rather how I am going to change or update this line of code since this is deprecated.
local function castRay ()
local origin = firePoint.Position
local direction = (mouse.Hit.p - firePoint.Position).Unit
direction = direction * gunSettings.range
local ray = Ray.new(origin, direction)
local hit, pos = workspace:FindPartOnRayWithIgnoreList(ray, ignoreList)
replicatedStorage.Replicate:FireServer(tool, origin)
local visual = Instance.new("Part")
local length = (pos - origin).Magnitude
Specifically on local hit, pos, this is now deprecated as stated in roblox studio, as well as local ray, now I did research that this kind of code can be used instead of the following two that I just mentioned
local raycastParams = RaycastParams.new()
raycastParams.FilterType = Enum.RaycastFilterType.Blacklist
But the following lines such as length requires pos variable, I don't know how I can move forward thanks to this. So there is no error for now, but I am asking cause I want to implement the new raycast system in this function, and I'm kind of stuck on how to do it, Here is the full code of the function:
local function castRay ()
local origin = firePoint.Position
local direction = (mouse.Hit.p - firePoint.Position).Unit
direction = direction * gunSettings.range
local ray = Ray.new(origin, direction)
local hit, pos = workspace:FindPartOnRayWithIgnoreList(ray, ignoreList)
replicatedStorage.Replicate:FireServer(tool, origin)
local visual = Instance.new("Part")
local length = (pos - origin).Magnitude
visual.Anchored = true
visual.CanCollide = false
visual.Material = Enum.Material.Neon
visual.Color = gunSettings.rayColor
visual.Size = Vector3.new(gunSettings.raySize.X, gunSettings.raySize.Y, length)
visual.CFrame = CFrame.new(origin, pos)*CFrame.new(0,0,-length/2)
visual.Parent = workspace.Effects
debris:AddItem(visual, gunSettings.debrisTime)
return hit, pos, direction, origin
end

Answer 1

If you look at the docs for WorldRoot:Raycast, you'll see a code sample on how to utilize the new raycast function.
The new API just packages the data a little differently. Rather than passing your ignorelist into the raycast function, you pass it into the RaycastParams object. And all of the data you get back is packaged into a RaycastResult object.
So you can adapt your code simply like this :
local function castRay()
local origin = firePoint.Position
local direction = (mouse.Hit.p - firePoint.Position).Unit * gunSettings.range
local raycastParams = RaycastParams.new()
raycastParams.FilterType = Enum.RaycastFilterType.Blacklist
raycastParams.FilterDescendantsInstances = ignoreList
local raycastResult = workspace:Raycast(origin, direction, raycastParams)
local hit = raycastResult.Instance
local pos = raycastResult.Position
The rest of your code should work just as before.