Thermal camera

local cam = self.CreateLink("camera")
local screen = self.CreateLink("screen")
local button = self.CreateLink("button")

local RES = 61
local FOV = 90

local picture = nil
local x = 0
local y = 0

function Think()
    if not cam.Connected then return 1 end
    if not screen.Connected then return 1 end
    if not button.Connected then return 1 end

    if button.IsPressed() then
        picture = cam.Query(FOV, RES, RES)
        screen.Clear(Color(0, 0, 0, 0))
        x = 0
        y = 0
        return 5
    end

    if picture then
        local val = picture[x][y] or 0
        local col = Color(0, 0, 0, 255)

        if val > 0 then
            col = Color(255, 255, 255, 255)
        end

        screen.Draw(" ", x, y, Color(0,0,0,0), col)

        x = x + 1
        if x > RES then
            x = 0
            y = y + 1
        end

        if y > RES then
            picture = nil
        end
        return 0
    end

    return 0.25
end