Function computeInnerQuadrangleQuaternion

computeInnerQuadrangleQuaternion(q0: quat, q1: quat, q2: quat): quat
Parameters
- q0: quat
  Quaternion 0
- q1: quat
  Quaternion 1
- q2: quat
  Quaternion 2
Returns quat
Inner quadrangle quaternion