code: public Rotation aroundAxis(float x, float y, float z)
  	{
  		axisX = x;
  		axisY = y;
  		axisZ = z;
  		return this;
  	}
docs: Sets the axis for this {@link Rotation}.
  
  @param x the x
  @param y the y
  @param z the z
  @return the rotation