exposed access to the Rifts quaternions

include/ACGL/HardwareSupport/SimpleRiftController.hh

@@ -12,10 +12,10 @@
  */
 
 #include <ACGL/ACGL.hh>
-//#define ACGL_USE_OCULUS_RIFT
 #ifdef ACGL_USE_OCULUS_RIFT
 
 #include <ACGL/Math/Math.hh>
+#include <glm/gtc/quaternion.hpp>
 #include <ACGL/Scene/HMDCamera.hh>
 
 #include <ACGL/OpenGL/Objects/Texture.hh>
@@ -43,7 +43,7 @@ class SimpleRiftController
 {
 public:
     /**
-     * _riftnumber: which device to use in case multiple are attached
+     * _riftnumber: which device to use in case multiple are attached - NOTE: the Rift SDK has problems supporting this yet!
      * _performAutomaticMagneticCalibration: try to calibrate the magetometer to reduce drift
      *                                       the user has to look into at least four very different directions
      *                                       for this to work.
@@ -80,6 +80,18 @@ public:
     void setFoVMultiplier( float _factor ) { mFoVMultiplier = _factor; updateCameraFoV(); }
     float getFoVMultiplier() { return mFoVMultiplier; }
 
+    ///////////////////////////////////////////////////////////////////////////////////////////////////////////////
+    //
+    // Access to direct sensor data as an alternative to the use of the ACGL camera
+    //
+    ///////////////////////////////////////////////////////////////////////////////////////////////////////////////
+
+    //! get the rotation as a quaternion, the native format of the Rift (with sensor fusion):
+    glm::quat getFusedRotationQuaternion();
+
+    //! get the rotation as a quaternion, the native format of the Rift (without sensor fusion):
+    glm::quat getRotationQuaternion();
+
     ///////////////////////////////////////////////////////////////////////////////////////////////////////////////
     //
     // RAW parameters for distortion rendering:

src/ACGL/HardwareSupport/SimpleRiftController.cc

@@ -161,6 +161,28 @@ void SimpleRiftController::setPrediction( float _seconds )
     }
 }
 
+glm::quat riftQuatToGLM( const Quatf &_q )
+{
+    glm::quat glmQuat;
+
+    glmQuat.x = _q.x;
+    glmQuat.y = _q.y;
+    glmQuat.z = _q.z;
+    glmQuat.w = _q.w;
+
+    return glmQuat;
+}
+
+glm::quat SimpleRiftController::getFusedRotationQuaternion()
+{
+    return riftQuatToGLM( mORSensorFusion->GetPredictedOrientation() );
+}
+
+glm::quat SimpleRiftController::getRotationQuaternion()
+{
+    return riftQuatToGLM( mORSensorFusion->GetOrientation() );
+}
+
 glm::mat4 SimpleRiftController::getProjectionMatrixFromCamera()
 {
     if (!mCamera) return glm::mat4();