mouse camera emulation

[richard antoine]

I don't understand why I have a TrackIR remains unusable when I play games like GTA or Witcher while it would make my life easier by using it to emulate the mouse camera . Is it so difficult for developers to create software capable of emulating mouse camera ? The potential of the TrackIR would finally be exploited rather than gathering dust mostly on my shelf .
Thx in advance for a constructive response