local FrictionPreset = class('FrictionPreset')

function FrictionPreset:initialize(config)
    config = config or {}

    self.B = config.B or 11
    self.C = config.C or 1.15 
    self.D = config.D or 1.03
    self.E = config.E or -10
end

function FrictionPreset:evaluate(slip)
    local t = math.abs(slip)

    return self.D * math.sin(self.C * math.atan(self.B * t - self.E * (self.B * t - math.atan(self.B * t))))
end

return FrictionPreset