Ladies and Gentlemen, in the January Update Sir, You Are Being Hunted got TrackIR support. TrackIR is an optical motion tracking game controller, created by NaturalPoint Inc. Device tracks head motions with up to six degrees of freedom (6DOF).

• Official site[naturalpoint.com]

Using TrackIR giving a brand new way to play the game. Good sir (or madam) can buy that device or consider the second option.

FaceTrackNoIR is free 6DOF headtracking software (Distributed under GNU General Public License Version 3.0). It allow use of simple webcam (or not simple) to track head motions.

• Official site[facetracknoir.sourceforge.net]
  
• SourceForge project page[sourceforge.net]

Last version: 1.7 (Size ~75 MB)

Downloading and installing shouldn't cause any problems.

At start FaceTrackNoIR loads default profile (.ini-file). That profile configured for most applications. It can be used in Sir, You Are Being Hunted, but it not enough accurate (need to fix head position to focus on one spot, sight could suddenly fly away or stop your movement and ect). So it better make more accurate profile to prevent excessive neck strain.




FaceAPI V3.2.6 is pretty simple facetracking API. Sir, You Are Being Hunted uses only 3DOF - Yaw, Pitch and Roll - so another 3DOF (X, Y and Z) could be disabled in settings. Also webcam can be configured in "Settings" menu (with "Camera" -> "Driver Controls...").



Default settings of Filter (Accela Filter Mk2) and Game protocol (FreeTrack 2.0) doesn't require modification (works quite well).

Press "Start" button for starting headtracking. On FaceTrackNoIR left panel appears picture from webcam and hovering mask on it.

• If it doesn't happend then press Tracker Source "Settings" button and Engine state "Start" button (should be "TRACKING")

Then run Sir, You Are Being Hunted and enable TrackIR ("Control Options").

• At the moment only 32-bit supports headtracking

(About TrackIR Sensitivity and Smoothing below)


Order to begin adjustments assign key bindings in "Shortkeys" for "Center". By pressing that button tracker backs sight to zero point (direct look at screen). Also can be disabled beep tune on button pressing. Now good sir (or madam) could start making adjustments parallel to game. Windowed mode is preferable (fullscreen mode is fine too).

Most adjustments will be performed in "Curves" section ("Curves" button on main window).

3DOF used in Sir, You Are Being Hunted:

• Yaw - Turning head left and right - Look left and right
  
• Pitch - Tilting head forward and backward - Look up and down
  
• Roll -Tilting head side to side - Lean left and right (like default key binding Q and E)

There are four panels on "Curves" section. Yaw and Roll have by single panel because they are symmetric (tracks left and right movement). Pitch have two panels - one for up and other for down.
Each panel have coordinate axis. Horizontal axis for input rotation degree and vertical axis for output degree. Based on Raw Input data (can be found below webcam picture) possible to easily set graph of relation between input and output rotation degree.

• Left-click the graph to place a new point, right-click a point to remove
  
• Left-click and drag to move a point

For more smooth outputting Smoothing should be set at 50 samples in Global Settings (on main window). TrackIR Sensitivity (in game) should be set as mouse sensitivity.
After all save adjustments in personal .ini-file.

This guide was done in haste. I will remade Curves as soon as I'll get my webcam. Also could post Example.ini with own setting.

Hope this guide will be useful.