tabletop_fading_color_cube.lua

function hsvToRgb(h, s, v, a)
  local r, g, b

  local i = math.floor(h * 6);
  local f = h * 6 - i;
  local p = v * (1 - s);
  local q = v * (1 - f * s);
  local t = v * (1 - (1 - f) * s);

  i = i % 6

  if i == 0 then r, g, b = v, t, p
  elseif i == 1 then r, g, b = q, v, p
  elseif i == 2 then r, g, b = p, v, t
  elseif i == 3 then r, g, b = p, q, v
  elseif i == 4 then r, g, b = t, p, v
  elseif i == 5 then r, g, b = v, p, q
  end

  return {red = r * 255, green = g * 255, blue = b * 255, alpha = a * 255}
end

curHue = 0

function update()
    if curHue + 1 > 360 then
        curHue = 0
    else
        curHue = curHue + 1
    end

    local color = hsvToRgb(curHue / 360,1,1,1)

    self.setColorTint({r = color["red"] / 255, g = color["green"] / 255, b = color["blue"] / 255})
end