Sprite.java

public class Sprite
{
  private double left;  //the x-coordinate of the left edge of the sprite
  private double top;   //the y-coordinate of the top edge of the sprite
  private int width;
  private int height;
  private String image;
  
  public Sprite(double theLeft, double theTop, int theWidth, int theHeight, String theImage)
  {
    left = theLeft;
    top = theTop;
    width = theWidth;
    height = theHeight;
    setImage(theImage);
  }

  public Sprite() {

  }

  public boolean touching(double x, double y)
  {
    return x>left && x<left+width && y>top && y<top + height;
  }

  public boolean touchingAfterDisplacement(double x, double y, double dx, double dy)
  {
    return x>left+dx && x<left+width+dx && y>top+dy && y<top + height+dy ;
  }

  public boolean touching(Sprite s)
  {
    double scale = 0.2;
    double sRight = (s.getLeft() + s.getWidth()) - s.getWidth()*scale;
    double sBottom = s.getTop() + s.getHeight() - s.getHeight()*scale;
    if (touching(s.getLeft() + s.getWidth()*scale, s.getTop() + s.getHeight()*scale))
      return true;
    if (touching(s.getLeft() + s.getWidth()*scale,sBottom))
      return true;
    if (touching(sRight,sBottom))
      return true;
    if (touching(sRight,s.getTop() + s.getHeight()*scale))
      return true;
    return false;
  }

  public void deactivate()
  {
    setHeight(0);
    setLeft(10000);
    setTop(10000);
  }

  public boolean touching(Sprite s, double scale)
  {
    double sRight = (s.getLeft() + s.getWidth()) - s.getWidth()*scale;
    double sBottom = s.getTop() + s.getHeight() - s.getHeight()*scale;
    if (touching(s.getLeft() + s.getWidth()*scale, s.getTop() + s.getHeight()*scale))
      return true;
    if (touching(s.getLeft() + s.getWidth()*scale,sBottom))
      return true;
    if (touching(sRight,sBottom))
      return true;
    if (touching(sRight,s.getTop() + s.getHeight()*scale))
      return true;



    return false;
  }

  public boolean touchingAfterDisplacement(Sprite s, double dx, double dy) {
    double scale = 0.2;
    double sLeft = s.getLeft();
    double sTop = s.getTop();
    double sRight = (s.getLeft() + s.getWidth());
    double sBottom = s.getTop() + s.getHeight();

    if (touchingAfterDisplacement(sLeft,sTop,dx,dy))
      return true;
    if (touchingAfterDisplacement(sLeft,sBottom,dx,dy))
      return true;
    if (touchingAfterDisplacement(sRight,sTop,dx,dy))
      return true;
    if (touchingAfterDisplacement(sRight,sBottom,dx,dy))
      return true;

    if (touchingAfterDisplacement(sLeft + s.getWidth()/2,sTop,dx,dy))
      return true;
    if (touchingAfterDisplacement(sLeft,sTop + s.getHeight()/2,dx,dy))
      return true;

    if (touchingAfterDisplacement(sLeft+ s.getWidth()/2,sBottom,dx,dy))
      return true;
    if (touchingAfterDisplacement(sRight,sTop+s.getHeight()/2,dx,dy))
      return true;

  return false;
  }


  public double getLeft()
  {
    return left;
  }
  
  public void setLeft(double l)
  {
    left = l;
  }
  
  public double getTop()
  {
    return top;
  }
  
  public void setTop(double t)
  {
    top = t;
  }
  
  public int getWidth()
  {
    return width;
  }
  
  public void setWidth(int w)
  {
    width = w;
  }
  
  public int getHeight()
  {
    return height;
  }
  
  public void setHeight(int h)
  {
    height = h;
  }
  
  public String getImage()
  {
    return image;
  }
  
  public void setImage(String i)
  {
    image = i;
  }
  
  public void step(Generate generate)
  {
    //do NOT insert any code here
  }
}