The standard MS joystick interface is perfectly adequate, as I've already said. An axis is an axis, whether it is derived from head movement or a joystick pot. It is a digital input derived from a sensor. I don't have to 'prove' anything. If NP want to claim propritary rights, it is down to them to offer proof. what exactly are NP claiming rights to? Unless they can offer an explanation as to why the existing interface was unsuitable, any claim to 'originality' should be treated with suspicion. Intellectual property rights are only supposed to be enforced to encourage new developments, not to support a monopoly of the obvious.
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