void InitDR()
 {
     DRRiggingV = new DeadReckoningVector[riggingTransforms.Length];
     DRRiggingQ = new DeadReckoningQuaternion[riggingTransforms.Length];
     for (int i = 0; i < riggingTransforms.Length; ++i)
     {
         DRRiggingV[i] = new DeadReckoningVector();
         DRRiggingQ[i] = new DeadReckoningQuaternion();
     }
 }