Is There Any Way to Detect If the Player Sees Light?

Help and Feedback Scripting Support
#1

Hi Everyone!

I’m using a lens flare script, and I want to modify it so the lens flare also works with light objects (point light, spotlight, etc.). Is there any way to detect if the player is looking at light, or if there is a way to modify this script so it works with light too? Thanks!

The LocalScript:

local player = game.Players.LocalPlayer
local camera = workspace.CurrentCamera
local gui = script.Parent
local flares = {}
local char

repeat char = player.Character wait(1/30) until char

for i, child in pairs(gui:GetChildren()) do
	if child.Name:sub(1, 5) == "flare" then
		flares[child] = tonumber(child.Name:match("flare%d+ : (%-?.+)"))
	end
end

function project(cam, point)
	local dif = cam:pointToObjectSpace(point)
	local fov = math.atan(math.rad(camera.FieldOfView))
	local z = -dif.z
	if z > 0 then
		local x = (dif.x / fov / 1.3) / (z + 1) * (gui.AbsoluteSize.y / gui.AbsoluteSize.x)
		local y = (dif.y / fov / 1.3) / (z + 1) * -1
		return x, y, true
	else
		return 0, 0, false
	end
end

function rayCast(pos, dir, ignore)
	return workspace:FindPartOnRayWithIgnoreList(Ray.new(pos, dir), ignore)
end

while wait(1/60) do
	local suns = 0
	for i = 1, 5 do
		local frame = CFrame.new(camera.CoordinateFrame.p, camera.CoordinateFrame.p + game.Lighting:GetSunDirection())
		frame = frame * CFrame.Angles(0, 0, i/5 * math.pi*2)
		frame = frame * CFrame.Angles(math.rad(5), 0, 0)
		if not rayCast(frame.p, frame.lookVector*999, {char}) then
			suns = suns + 1
		end
	end
	if suns > 0 then
		local x, y, z = project(camera.CoordinateFrame, camera.CoordinateFrame.p + game.Lighting:GetSunDirection()*25)
		if z then
			for flare, pos in pairs(flares) do
				flare.Position = UDim2.new(0.5 + x*pos, -flare.AbsoluteSize.x/2, 0.5 + y*pos, -flare.AbsoluteSize.y/2)
				flare.Visible = true
			end
		else
			for flare in pairs(flares) do
				flare.Visible = false
			end
		end
	else
		for flare, pos in pairs(flares) do
			flare.Visible = false
		end
	end
end
#2

You can make for example a part. Where the light is and detect when the player is touching it…

#3

Sorry, this doesn’t really answer my question. I want to know if there is a way to detect if the player is looking at a light source, not touching it. Thanks!

#4

I believe that @LOG1CEXE was suggesting the use of an invisible part that acts as a “hitbox” for the light. You can detect when the player enters the light when the player touches the invisible part. You could also try using raycasts to detect when a player looks at a part that has a light source, but avoid doing that every frame due to performance costs.

#5

Your solution definitely resides with raycasting. The general idea is to cast a ray from the camera’s position to the light source, and if there’s nothing intersecting then display the lens flare. Otherwise, disable it. You’ll also want to take field of view into account. For performance, you could probably run this process on the Heartbeat event of RunService.

1 Like
#6

Hi, thanks for your reply. Can you give a code snippet please, as an example?

#7

I know its kinda late but there is a module

1 Like