gistfile1.java

            case MotionEvent.ACTION_UP: {

                for (int a = 0; a < MoveList.size(); a++) {
                    String zxc = MoveList.get(a).toString();
                    qwe = qwe + zxc + "\n";
                }

                MyActivity.prevtextview.setText("Prev_angle: " + String.valueOf(mPrevAngle));
                MyActivity.currtextview.setText("Curr_angle List: " + String.valueOf(qwe));

                add_it = how_much_degree_already_rotated;

                Vector2 start = new Vector2(start_x, start_y);
                Vector2 stop = new Vector2(x, y);
                Vector2 center = new Vector2(xc, yc);

                float direction = ((start.x - center.x) * (stop.y - start.y)) - ((start.y - center.y) * (stop.x - start.x));

                if(direction > 0) {
                    Log.e("TAG", "left");
                } else if (direction < 0) {
                    Log.e("TAG", "right");
                } else {
                    Log.e("TAG", "same direction");
                }