Hi! I’m trying to plan out a way for me to make a GUI that shows the aiming line of a gun similar to the one in Running with Rifles and Foxhole…
I believe it has to do something with raycasting if implemented in ROBLOX, but I would like other thoughts on this since I’m lacking a bit in experience. Thanks!
I’m quite curious too. Honestly, the way I’d do it is with raycasting.
When you cast a ray, it comes with a hit detector that will tell the position of where the ray hit (if it hits something). Now that you have the two points, I’d have 1 part that would be positioned over the ray, constantly changing relative to the distance between the two points. Probably use heartbeat() or something like that to smoothly change the part’s size.
Just throwing my idea out. Hope it helps.
Good idea! I tried your idea via a raycast plus beam with this very crude script I made… it works but it has an issue where the target starts locking onto a ‘part’ that exists, so its location is determined by the midpoint of a brick that it hits.
Here’s a script I made:
local player = game.Players.LocalPlayer
local mouse = player:GetMouse()
local RS = game:GetService("RunService")
local TOOL = script.Parent
TOOL.Equipped:Connect(function()
local part = Instance.new("Part")
part.Parent = workspace
part.Name = "Aim"
part.Size = Vector3.new(0.1, 0.1, 0.1)
part.Transparency = 1
part.Anchored = true
mouse.TargetFilter = part
local focus = Instance.new("Part")
local attachment = Instance.new("Attachment")
attachment.Parent = focus
local beam = Instance.new("Beam")
beam.Parent = TOOL
beam.Attachment0 = focus.Attachment
beam.Attachment1 = TOOL.Flare.Attachment
beam.Width0 = 0.2
beam.Width1 = 0.2
beam.FaceCamera = true
beam.Transparency = NumberSequence.new(0.2,0.2)
focus.Parent = workspace
focus.Name = "AimFocus"
focus.Anchored = true
focus.BrickColor = BrickColor.new("Really red")
focus.CanCollide = false
focus.Size = Vector3.new(0.1, 0.1, 0.1)
while RS.Heartbeat:Wait() do
part.CFrame = CFrame.new(mouse.Hit.p)
local rayOrigin = script.Parent.Flare.Position
local rayDestination = part.Position
local rayDirection = rayDestination - rayOrigin
local ray = Ray.new(rayOrigin, rayDirection)
local PART = workspace:FindPartOnRay(ray)
focus.Position = PART.Position
end
end)
TOOL.Unequipped:Connect(function()
local part = workspace:FindFirstChild("Aim")
local part2 = workspace:FindFirstChild("AimFocus")
local beam = TOOL:FindFirstChild("Beam")
part:Destroy()
part2:Destroy()
beam:Destroy()
end)
When not obstructed:
When obstructed:
Notice how the beam doesn’t focus to the cursor.
I’ve found the issue, because the FindPartOnRay will find bricks and my script will make the Focus part’s position the same as the obstacle’s position. However I’m not sure how to go around this.
I hope someone can help me with this issue, thanks!
Ah, FindPartOnRay wasn’t the thing I’m talking about. There’s another thing you can do with rays, which is raycastResult.Position. Here’s a snippet of code that I use for my own gun system, modified slightly.
local raycastResult = workspace:Raycast(barrel.Position, unitRay.Direction * 1000)
if raycastResult then
print(raycastResult.Position)
-- prints where the ray hit exactly
which should give you the exact location of where the ray hit, instead of snapping onto the part where you hit. I noticed that you’re using Ray.new() instead of workspace:Raycast() which I don’t know which is better, but I think it’s the newer way to raycast. Here’s an overview of the most up-to-date way to raycast (I think) and raycast.Position should be included here.
Ooh, I see, I’ll read a bit on Raycasting and thanks for the reply on the raycastResult.Position. I’ve tweaked it to my needs and while it is better than before, there’s an issue where the raycastResult.Position keeps approaching the player when raycastResult = true.
Initially:
After some time:
The adjustment I did:
while RS.Heartbeat:Wait() do
part.CFrame = CFrame.new(mouse.Hit.p)
local rayOrigin = script.Parent.Flare.Position
local rayDestination = part.Position
local rayDirection = rayDestination - rayOrigin
local raycastResult = workspace:Raycast(rayOrigin, rayDirection)
focus.Position = raycastResult.Position
endNevermind, I found the issue:
The focus part wasn’t filtered and so the raycastResult had its ‘part’ on the focuspart which was causing the issue.
For anyone who reads this, the script I added is:
local raycastParams = RaycastParams.new()
raycastParams.FilterDescendantsInstances = {focus}
raycastParams.FilterType = Enum.RaycastFilterType.BlacklistGlad to help! If everything is fine now please mark a solution.