mgba/res/scripts/tilt-random-walk.lua

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local r = 0
local theta = 0
local rotation = {}
math.randomseed()
function rotation.sample()
theta = math.fmod(theta + math.random() / 20, math.pi * 2)
r = math.min(math.max(r + (math.random() - 0.5) / 50, -1), 1)
end
function rotation.readTiltX()
return math.cos(theta) * r
end
function rotation.readTiltY()
return math.sin(theta) * r
end
emu:setRotationCallbacks(rotation)