light color change detection not working? | Roblox Studio Community | Page 1

midnight storm Apr 11, 2025, 4:03 PM

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function StationService:StationLeave(trainSettings)
    runned = false
    for _, StationsInFolder in pairs(mTrackFolder:GetChildren()) do
        if StationsInFolder.Name == trainSettings.StationName.Value then
            runned = true
            
            for _, NextStationsInFolder in pairs(mTrackFolder:GetChildren()) do
                if NextStationsInFolder.Name == StationsInFolder.Configuration.NextStation.Value then

                    local redLight = NextStationsInFolder.Signal.RedLight
                    local greenLight = NextStationsInFolder.Signal.GreenLight

                    while true do
                        local r, g, b = greenLight.Color.R * 255, greenLight.Color.G * 255, greenLight.Color.B * 255
                        print(string.format("GreenLight RGB: %d, %d, %d", r, g, b))

                        if NextStationsInFolder.Configuration.Occupied.Value == true then
                            warn(NextStationsInFolder.Name, " is currently occupied!")

                        elseif redLight.Color == Color3.fromRGB(151, 0, 0) then
                            warn(NextStationsInFolder.Name, " is currently on a red light!")

                        elseif greenLight.Color == Color3.fromRGB(255, 255, 0) then
                            warn(NextStationsInFolder.Name, " is currently on a yellow light!")

                        else
                            break
                        end

                        wait(0.25)
                    end

                    StationsInFolder.Configuration.Occupied.Value = false
                    trainSettings.StationName.Value = StationsInFolder.Configuration.NextStation.Value
                end
            end

            if runned == false then
                warn("No station leave action was complete!")
            end
        end
    end
end```

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so you can see in the video the light changes while the while loop is running and yet it detects no color change.

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the code is supposed to only let the train run when the light isnt red or yellow and isnt occupied

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the occupied bit works but the color detection is not

midnight storm Apr 11, 2025, 4:44 PM

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Anyone?

urban totemBOT Apr 11, 2025, 4:44 PM

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studio ** You are now Level 7! ** studio

somber spruce Apr 11, 2025, 5:17 PM

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the issue seems to be with how you’re checking the Color3 values in a loop. Color3 comparison using == can be unreliable if the color is set via script or tweening (as float precision may slightly change).

⸻

Problem Summary

Your code: elseif redLight.Color == Color3.fromRGB(151, 0, 0) then

Fix 1: Use Color3:ToHex() or RGB rounding for comparison

Here’s how you can fix it using rounded RGB values:

Updated while loop portion: while true do
local rG, gG, bG = math.floor(greenLight.Color.R * 255 + 0.5), math.floor(greenLight.Color.G * 255 + 0.5), math.floor(greenLight.Color.B * 255 + 0.5)
local rR, gR, bR = math.floor(redLight.Color.R * 255 + 0.5), math.floor(redLight.Color.G * 255 + 0.5), math.floor(redLight.Color.B * 255 + 0.5)

print(string.format("GreenLight RGB: %d, %d, %d", rG, gG, bG))

if NextStationsInFolder.Configuration.Occupied.Value == true then
    warn(NextStationsInFolder.Name, " is currently occupied!")

elseif rR == 151 and gR == 0 and bR == 0 then
    warn(NextStationsInFolder.Name, " is currently on a red light!")

elseif rG == 255 and gG == 255 and bG == 0 then
    warn(NextStationsInFolder.Name, " is currently on a yellow light!")

else
    break
end

task.wait(0.25)

end

#

||In summary heres the Updated while loop portion: while true do
local rG, gG, bG = math.floor(greenLight.Color.R * 255 + 0.5), math.floor(greenLight.Color.G * 255 + 0.5), math.floor(greenLight.Color.B * 255 + 0.5)
local rR, gR, bR = math.floor(redLight.Color.R * 255 + 0.5), math.floor(redLight.Color.G * 255 + 0.5), math.floor(redLight.Color.B * 255 + 0.5)

print(string.format("GreenLight RGB: %d, %d, %d", rG, gG, bG))

if NextStationsInFolder.Configuration.Occupied.Value == true then
    warn(NextStationsInFolder.Name, " is currently occupied!")

elseif rR == 151 and gR == 0 and bR == 0 then
    warn(NextStationsInFolder.Name, " is currently on a red light!")

elseif rG == 255 and gG == 255 and bG == 0 then
    warn(NextStationsInFolder.Name, " is currently on a yellow light!")

else
    break
end

task.wait(0.25)

end

lucid hatch Apr 11, 2025, 5:18 PM

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somber spruce the issue seems to be with how you’re checking the Color3 values in a loop. Colo...

Did you just ChatGPT this

somber spruce Apr 11, 2025, 5:18 PM

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No

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You know the while loop portion

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Update it with this

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while true do
local rG, gG, bG = math.floor(greenLight.Color.R * 255 + 0.5), math.floor(greenLight.Color.G * 255 + 0.5), math.floor(greenLight.Color.B * 255 + 0.5)
local rR, gR, bR = math.floor(redLight.Color.R * 255 + 0.5), math.floor(redLight.Color.G * 255 + 0.5), math.floor(redLight.Color.B * 255 + 0.5)

print(string.format("GreenLight RGB: %d, %d, %d", rG, gG, bG))

if NextStationsInFolder.Configuration.Occupied.Value == true then
    warn(NextStationsInFolder.Name, " is currently occupied!")

elseif rR == 151 and gR == 0 and bR == 0 then
    warn(NextStationsInFolder.Name, " is currently on a red light!")

elseif rG == 255 and gG == 255 and bG == 0 then
    warn(NextStationsInFolder.Name, " is currently on a yellow light!")

else
    break
end

task.wait(0.25)

end

lucid hatch Apr 11, 2025, 5:19 PM

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somber spruce No

I call bullshit on that.

somber spruce Apr 11, 2025, 5:19 PM

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try it

lucid hatch Apr 11, 2025, 5:20 PM

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somber spruce try it

I'm not the one with this issue, I'm just calling you out on your ChatGPT laziness.

somber spruce Apr 11, 2025, 5:20 PM

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wheres ur ev

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evidence

lucid hatch Apr 11, 2025, 5:22 PM

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The fact that this looks so damn AI it hurts, it's such a common ChatGPT format, using symbols not normally used in a Discord message in casual conversation

Like "Problem Summary" seriously?

#light color change detection not working?