Oculus Rift Improvements

- Now requires OVR SDK 0.2.5
- New chromatic aberration correction shader.  Can be disabled by
setting $pref::OculusVR::UseChromaticAberrationCorrection to false prior
to enabling Rift display (such as for screen shots).
- FXAA on by default when using full screen on the Rift.
- Can now manually override IPD from script.  Otherwise value set in
profile is used.
- Raw sensor data now available through input events (set
$OculusVR::GenerateSensorRawEvents to true) and console methods.  The
raw data is acceleration, angular velocity, and magnetometer reading.
- Can determine if magnetometer calibration data is available using a
console method in order to notify the user.

Engine/source/platform/input/oculusVR/oculusVRHMDDevice.h

@@ -54,6 +54,12 @@ protected:
    // Windows display device name used in EnumDisplaySettings/CreateDC
    String   mDisplayDeviceName;
 
+   // MacOS display ID
+   S32      mDisplayId;
+
+   // Desktop coordinate position of the screen (can be negative; may not be present on all platforms)
+   Point2I  mDesktopPosition;
+
    // Whole screen resolution
    Point2I  mResolution;
 
@@ -70,6 +76,9 @@ protected:
    // Physical distance between lens centers, in meters
    F32      mLensSeparation;
 
+   // Physical distance between the user's eye centers as defined in the current profile
+   F32      mProfileInterpupillaryDistance;
+
    // Physical distance between the user's eye centers
    F32      mInterpupillaryDistance;
 
@@ -79,6 +88,9 @@ protected:
    // Radial distortion correction coefficients used by the barrel distortion shader
    Point4F  mKDistortion;
 
+   // Chromatic aberration correction coefficients
+   Point4F mChromaticAbCorrection;
+
    // Calculated values of eye x offset from center in normalized (uv) coordinates
    // where each eye is 0..1.  Used for the mono to stereo postFX to simulate an
    // eye offset of the camera.  The x component is the left eye, the y component
@@ -137,6 +149,12 @@ public:
    // Windows display device name used in EnumDisplaySettings/CreateDC
    const char* getDisplayDeviceName() const { return mDisplayDeviceName.c_str(); }
 
+   // MacOS display ID
+   S32 getDisplayDeviceId() const { return mDisplayId; }
+
+   // Desktop coordinate position of the screen (can be negative; may not be present on all platforms)
+   const Point2I& getDesktopPosition() const { return mDesktopPosition; }
+
    // Whole screen resolution
    const Point2I& getResolution() const { return mResolution; }
 
@@ -153,15 +171,24 @@ public:
    // Physical distance between lens centers, in meters
    F32 getLensSeparation() const { return mLensSeparation; }
 
+   // Physical distance between the user's eye centers as defined by the current profile
+   F32 getProfileIPD() const { return mProfileInterpupillaryDistance; }
+
    // Physical distance between the user's eye centers
    F32 getIPD() const { return mInterpupillaryDistance; }
 
+   // Set a new physical distance between the user's eye centers
+   void setIPD(F32 ipd, bool calculateDistortionScale);
+
    // Provides the IPD of one eye as a Point3F
    const Point3F& getEyeWorldOffset() const { return mEyeWorldOffset; }
 
    // Radial distortion correction coefficients used by the barrel distortion shader
    const Point4F& getKDistortion() const { return mKDistortion; }
 
+   // Chromatic aberration correction coefficients used by the barrel distortion shader
+   const Point4F& getChromaticAbCorrection() const { return mChromaticAbCorrection; }
+
    // Calculated values of eye x offset from center in normalized (uv) coordinates.
    const Point2F& getEyeUVOffset() const { return mEyeUVOffset; }