/// <summary>
/// Creates ViewVector from spatialVector.
/// Note: spatialVector MUST originate from origin.
/// </summary>
public ViewVector(Vector3 spatialVector)
{
Theta = Intersector.RadToDeg(AdjAtanTheta(spatialVector.x, spatialVector.z));
Phi = Intersector.RadToDeg(AdjAtanPhi(spatialVector));
}