Raycast Wont Work

Help and Feedback Scripting Support
#1

Hello Developers! :wave:

My raycast wont work:

local part = game.Workspace.Part
local raycastParams = RaycastParams.new()

raycastParams.FilterDescendantsInstances = {game.Workspace.Baseplate}
raycastParams.FilterType = Enum.RaycastFilterType.Blacklist


while true do
	wait(1)
	local raycastResult = game.Workspace:Raycast(part.Position, part.CFrame.UpVector * 50, raycastParams)

	if raycastResult then
		print("Ray has been touched by " .. raycastResult.Instance)
    end
end
#2

What exactly do you mean by not working? Is it erroring or is it not printing something when it’s supposed to?

1 Like
#3

It’s not erroring, and it’s not printing anything in the output.

#4

RaycastResult is only returned if the ray had successfully intersected something. What object is the ray supposed to be targeting?

Also check:

  • The direction of the ray
  • The length of the ray being able to reach a target
  • The script itself, if it’s even running properly(the while loop)
#5

Try using (part.CFrame * part.CFrame.UpVector) * 50

1 Like
#6

Doesn’t work somehow. I don’t know why…

#7

The direction of the ray is up, above the part. 50 studs up. The while loop is working, I used print statements to determine which part of the loop works. And the problem of the script is this:

if raycastResult then
	print("Ray has been touched by " .. raycastResult.Instance)
end

It wouldn’t print anything in this if statement and it is in the while loop. Help me please :grimacing:

#8

Try printing the raycastResult? Also add a else statement with another print if there isn’t a RaycastResult

#9

After testing your code in a blank baseplate I noticed the print statement on line 13 errors. This could be the reason why your code doesn’t work.

image

Try changing line 13 to this:

print("Ray has been touched by " .. raycastResult.Instance.Name)

Full code:

local part = game.Workspace.Part
local raycastParams = RaycastParams.new()

raycastParams.FilterDescendantsInstances = {game.Workspace.Baseplate}
raycastParams.FilterType = Enum.RaycastFilterType.Blacklist


while true do
	wait(1)
	local raycastResult = game.Workspace:Raycast(part.Position, part.CFrame.UpVector * 50, raycastParams)

	if raycastResult then
		print("Ray has been touched by " .. raycastResult.Instance.Name)
	end
end
#10

Ok, so I wrote this:

while true do
	wait(1)
	local raycastResult = game.Workspace:Raycast(part.Position, part.CFrame.UpVector * 50, raycastParams)
	
	print(raycastResult)

	if raycastResult then
		print("Ray has been touched by " .. raycastResult.Instance)
	else
		print("Nothing touched")
	end
end

It’s printing in the output nil and nothing touched. Even if a part intersected with the ray.

#11

I didn’t get anything and I got no errors in the output.

#12

My guess is that 1 of the parameters in the raycastResult is a invalid argument or something? Try just doing Vector3.new(0, 50, 0) instead of part.CFrame.UpVector * 50 for the second argument

1 Like
#13

No, it just prints nothing is intersecting with ray. And I tried to change UpVector and Vector3 with lookvector. But still doesn’t work.

#14

Ok, how about trying this instead?

  • Place another Part inside the workspace, move it 20 studs up & make the size large so that it’s detectable from where the original Part is supposed to be

  • Detect if that Part will intersect the Ray if possible?

#15

It kinda worked. I wrote:

print("Ray has been touched by " .. raycastResult.Instance:GetFullName)

With the function getfullname. It printed the I touched the ray with my right arm. But it kinda works and kinda doesn’t.

#16

Ok, it worked. I made a part and named it “DemoPart”. Then it printed, “Ray has been intersected by DemoPart”. But, when I remove the part in studio with the move tool… It still prints the same thing, even though I moved it away from the ray. I jumped on the part and it wont print my name.

#17

Ok, here’s what my guess is then for the reason why the raycastResult printed as nil:

  • You defined FilterDescendantsInstances inside the Baseplate, and the FilterType was equal to a Blacklist which basically ignored the Baseplate

  • Since there wasn’t a proper raycastResult, it resulted as nil

You could just remove the raycastParams and see if that changes anything at all?

#18 
local part = game.Workspace.Part
local raycastParams = RaycastParams.new()

raycastParams.FilterDescendantsInstances = {game.Workspace.Baseplate}
raycastParams.FilterType = Enum.RaycastFilterType.Blacklist


while true do
	wait(1)
	local raycastResult = game.Workspace:Raycast(part.Position, (part.Position + part.CFrame.UpVector * 50), raycastParams)

	if raycastResult then
		print("Ray has been touched by " .. raycastResult.Instance)
    end
end
#19

Doesn’t work. It still prints even though I used the move tool to remote the demopart in-game.

#20

It doesn’t even print anything in the chat…