private IEnumerator routineRollCube() {
        float rotateAmount = 90.0f;
        Vector3 delta = new Vector3(rotateAmount, 0f, 0f);
        Vector3 axis = Vector3.left;
        Vector3 currentPivot = _pivotList[_pivotIndex].transform.position;

        float initialDuration = _gameManager.RollDuration;
        float warpedDuration = _gameManager.RollDuration;

        var reachedHalfPoint = false;
        var isOnTile = true;

        float startTime = Time.time;
        float endTime = startTime + warpedDuration;

        float oldY = colliderGo.transform.position.y;

        Vector3 translateVector = new Vector3(0, 0, 0);

        Quaternion rotationFinish = modelGo.transform.rotation * Quaternion.Euler(new Vector3(-rotateAmount, 0f,0f));
        Vector3 positionFinish = modelGo.transform.position;
        positionFinish.z -= 1f;

        desolidifyIfWaterCube();

        _rollPercentage = 0f;

        while (true) {
            while (_gameManager.isPaused) {
                yield return null;
            }


            warpedDuration += (initialDuration) - (warpedDuration * 0.5f); // todo; pull from time warp

            _rollPercentage = (Time.time - startTime) / warpedDuration;
            if (_rollPercentage > 1f) {
                break;
            }

            float angle = rotateAmount * (Time.deltaTime / warpedDuration);

            // Check to see if cube is out of bounds, or current tile is no longer active
            if (currentTile == null || !currentTile.isInPlay) {
                fallIfNeeded();
                IsBusy = false;
                yield break;
            }

            isOnTile = _gameManager.TileHasNextTile(currentTile);
            if (!isOnTile) {
                //Debug.Log("is not on tile");
            }

            // Check to see if cube was removed
            if (!mIsInActiveCubes) {
                IsBusy = false;
                yield break;
            }

            // Move cube to next tile if at half point
            if (!reachedHalfPoint && _rollPercentage >= 0.5f) {
                // If next tile does not exist, then trigger a fall
                if (!_gameManager.TileHasNextTile(currentTile)) {
                    fallIfNeeded();
                    IsBusy = false;
                    yield break;
                }
                _gameManager.AddMoveCubeToTile(GameBoard.Direction.DOWN, currentTile);
                reachedHalfPoint = true;
            }

            modelGo.transform.RotateAround(currentPivot, axis, angle);

            // Translation
            translateVector = modelGo.transform.position;
            translateVector.y = oldY;

            colliderGo.transform.position = translateVector;

            yield return null;
        }

        _rollPercentage = -1f;

        _isRolling = false;
        _gameManager.OnCubeFinishedRolling(this);
        //Debug.Log("cube.isActivelyRolling = false");

        modelGo.transform.rotation = rotationFinish;
        modelGo.transform.position = positionFinish;

        _pivotIndex = getNextPivotIndex();

        // Check to see if cube is out of bounds
        if (currentTile == null) {
            fallIfNeeded();
        } else {
            IsBusy = false;
        }

        yield break;
    }