public class ScaleBranch extends SoundBranch {

  /**
   * Amount to scale
   **/
  double factor;
  
  /**
   * Construct a branch with this factor
   **/
  public ScaleBranch(double nufactor){
    super(); // Call superclass constructor
    this.factor = nufactor;
  }
  
  /**
   * Accessors
   **/
  public double getFactor() {return this.factor;}
  public void setFactor(double nufactor) {this.factor = nufactor;}
  /**
   * Method to return a string with informaiton 
   * about this branch
   */
  public String toString() 
  {
    return "ScaleBranch ("+factor+") "+super.toString();
  }
  
  /**
   * Collect all the sound from our children,
   * then collect from next.
   * Scale the children
   * @param pen Turtle to draw with
   **/
  public Sound collect(){
    
    Sound childSound;
    
    if (children != null)
    {childSound = children.collect().scale(factor);}
    else
    {childSound = new Sound(1);}
    
    // Collect from my next
    if (this.getNext() != null)
    {Sound nextSound=this.getNext().collect();
    childSound = childSound.append(nextSound);}
    
    return childSound;
  }
  
    /**
   * Collect all the sound from our children,
   * then collect from next.
   * Scale the next list, not the children
   * @param pen Turtle to draw with
   **/
  public Sound collectAfter(){
    
    Sound childSound;
    
    if (children != null)
    {childSound = children.collect();}
    else
    {childSound = new Sound(1);}
    
    // Collect from my next
    if (this.getNext() != null)
    {Sound nextSound=this.getNext().collect();
    childSound = childSound.append(nextSound.scale(factor));}
    
    return childSound;
  }}