How to Print something when seeing a Model

Help and Feedback Scripting Support
1

Hello!, How could I make it so that when you see a Model/Block, the console prints a text?, Basically like in the slenderman games, I couldn’t find a method for this

2

Calling workspace.CurrentCamera:WorldToViewportPoint(thingToSee.CFrame.Position) will return two variables, the second of which is whether or not thingToSee’s position is on-screen or not.
Check out the documentation here: Camera:WorldToViewportPoint

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3

adding onto what @MP3Face said, heres a script that does that

--- local script inside starter player scripts
local Camera = workspace.CurrentCamera
local Object:Model = workspace.BluePart -- change to model/part
local RunService = game:GetService("RunService")
RunService.RenderStepped:Connect(function()
	if Object:IsA("Model") then
		for i,v in pairs(Object:GetDescendants()) do
			local _, Cansee = Camera:WorldToViewportPoint(v)
			if Cansee == true then -- if the player sees it
				print('player can see object')
			end
		end
	elseif Object:IsA("BasePart") then
		local _, Cansee = Camera:WorldToViewportPoint(Object.CFrame.Position)
		if Cansee == true then -- if the player sees it
			print('player can see object')
		end
	end

	
end)
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4

First of all “== true” is redundant (because if the variable “Cansee” is not a reference to nil/false then it is truthy by default).

The first part of that connected callback function won’t work as you’re iterating over the descendants of a “Model” instance and passing each instance as an argument to the instance method “:WorldToViewportPoint()” which expects a position in the form/type of a Vector3 value of the Vector3 class. Finally the model’s variable declaration is incorrect.

local Object:Model = workspace.BluePart --colon isnt necessary here
local Object = workspace.BluePart --correct declaration

Anyway, I’ve decided to write my own implementation for this task too.

local Camera = workspace.CurrentCamera
local Model = workspace:WaitForChild("Model")
local RunService = game:GetService("RunService")

local function FindPartsRecursive(Object)
	if Object:IsA("Model") then
		for _, Child in ipairs(Object:GetChildren()) do
			FindPartsRecursive(Child)
		end
	elseif Object:IsA("BasePart") then
		local _, InViewport = Camera:WorldToViewportPoint(Object.Position)
		if InViewport then
			print(Model.Name.." is currently in the viewport.")
		end
	end
end

RunService.RenderStepped:Connect(function()
	FindPartsRecursive(Model)
end)