Raycast not working

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1

You can write your topic however you want, but you need to answer these questions:

  1. What do you want to achieve?
    When part is in front of a player, its transparency is .75, and when its not in front of the player anymore, its transparency goes back to 0. + I need to make the raycast detecting multiple parts.
  2. What is the issue?
    Raycast not working at all. No result and no errors in output.

here is the code:

local player = game.Players.LocalPlayer
local char = player.Character or player.CharacterAdded:Wait()

local function raycast(p0, p1, ignoreParts) 
	local ignoreTable = ignoreParts

	local params = RaycastParams.new()
	params.FilterType = Enum.RaycastFilterType.Exclude
	params.IgnoreWater = true
	params.FilterDescendantsInstances = {ignoreTable} 

	local hitItems = {}
	local finished = false

	repeat	
		params.FilterType = Enum.RaycastFilterType.Exclude
		params.IgnoreWater = true
		params.FilterDescendantsInstances = {ignoreTable}
		local result = workspace:Raycast(p0, p1 - p0, params)
		if result then
			if result.Instance then
				table.insert(hitItems, result.Instance)
				table.insert(ignoreTable, result.Instance)
				print("Instance Found!")
			else				
				print("No more instance")
				finished = true
			end
			task.wait()		
		end
		task.wait()
	until finished == true
	return hitItems
end

local p0 = workspace.CurrentCamera.CFrame.p
local p1 = player.Character:FindFirstChild("HumanoidRootPart").Position
local ignore = {char:GetDescendants()}

while true do
	task.wait()
	local items = raycast(p0, p1, ignore)
end

I really dont know what to do

2

Looks like one problem may be that you’re defining p0 and p1 outside of the loop; they will always stay the same, even when the character moves. Try putting those into the loop.

Above is another: ignoreTable is already a table, but you’re wrapping it in more brackets. You’re essentially saying {{char:GetDescendants()}} instead of {char:GetDescendants()}. RaycastParams takes an array, not an array of arrays.

On a side note, why have the ignoreTable variable instead of simply writing params.FilterDescendantsInstances = ignoreParts? There isn’t a need to create a new variable with the same value as what is passed into the function.

Also, try adding a few more print statements here and there to narrow down the problem. Let me know what changes.

3

Thanks for your reply! I’ll try what you said and I’ll tell you if it works!

4

I put the variables in the loop, and changed the IgnoreTable by IgnoreParts, but it doesn’t change anything, I still dont detect parts in the workspace. :confused:

5

Please add more print statements in various places like the while...do loop, inside the raycast function, etc. Let me know what gets printed to the output.

6

I solved the problem by replacing the while loop by RunService, I don’t know why this work and not the while loop

btw I added some print statement, when there is no result, when there is an instance found, and it was only printing “No Result”

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