HTSpriteSheet.Camera_BillboardingMode C# (CSharp) Method

    void Camera_BillboardingMode()
    {
        Vector3 lookAtVector =   mainCamTransform.position-myTransform.position ;

        switch (billboarding){
            case CameraFacingMode.BillBoard:
                myTransform.LookAt(  mainCamTransform.position - lookAtVector);
                myTransform.LookAt(  mainCamTransform.position );
                break;
            case CameraFacingMode.Horizontal:
                lookAtVector.x = lookAtVector.z =0 ;
                myTransform.LookAt(mainCamTransform.position - lookAtVector);
                break;
            case CameraFacingMode.Vertical:
                lookAtVector.y=lookAtVector.z =0;
                myTransform.LookAt(mainCamTransform.position - lookAtVector);
                break;
        }

        if (rotationStart!=rotationEnd){
            currentRotation+=rotationStep*Time.deltaTime;
        }

        //myTransform.eulerAngles = new Vector3(myTransform.eulerAngles.x,myTransform.eulerAngles.y,currentRotation);
    }