How to Raycast Help

Help and Feedback Scripting Support
1

How to Raycast
Don’t link me the roblox devhub article for this because the script contains a lot of functions and confusing variables I just want to know how to raycast a laser that goes from your camera to your mouse and I want to know how to exclude certin parts

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2

I know this is a big problem right now because the old raycast is deprecated, just search 2019 raycasting then look at how to use raycasting 2021

3

Ok so here is the basics:

local origin = Instance.Position
local direction = (origin - Instance.Position) -- //A maybe can't fully remember
local ray = workspace:RayCast(origin, direction)
4

This shoots a ray in the direction of the part when the event “EventOfYourChoice” fires:


local caster = script.Parent

-- SETTINGS
local range = 100


EventOfYourChoice:Connect(function()
	
	print("Fired!")
	
-- Set an origin and directional vector
	local rayOrigin = caster.Position
	
	local rayDirection = script.Parent.CFrame.LookVector * range

-- Build a "RaycastParams" object
	local raycastParams = RaycastParams.new()
	
	raycastParams.FilterDescendantsInstances = {game.Workspace.BlacklistedModel}
	
	raycastParams.FilterType = Enum.RaycastFilterType.Blacklist
	
-- Cast the ray	
	
	local raycastResult = workspace:Raycast(caster.Position,rayDirection, raycastParams)

-- Checks if it hit and what it hit
	
	if raycastResult then
		
		local hitPart = raycastResult.Instance
	
		print ("Hit ".. hitPart.Name)
		
		local distance = (raycastResult.Position - caster.Position).Magnitude
		
		print ("Distance: "..distance)
		
	else
		
		print ("Missed!")
		
	end

end)