package BugRunner;

// BatSprite.java
// Andrew Davison, April 2005, ad@fivedots.coe.psu.ac.th

/* The bat can move in a horizontal direction only, along the
   floor. It is controlled by the arrow keys or mouse
   presses. 

   As the bat leaves one side of the panel, it appears on
   the other side.

   The bat is assigned a left-facing and right-facing set
   of images (an ant), which are cycled throught.

   The ant images come from the SpriteLib sprite library by 
   Ari Feldman at http://www.arifeldman.com/games/spritelib.html
*/


public class BatSprite extends Sprite
{
  private static double DURATION = 0.5;  // secs
    // total time to cycle through all the images

  private static final int FLOOR_DIST = 21;   
      // distance of ant's top from the floor
  private static final int XSTEP = 5;   
     // step distance for moving along x-axis


  private int period;
   /* in ms. The game's animation period used by the image
      cycling of the bat's left and right facing images. */


  public BatSprite(int w, int h, ImagesLoader imsLd, int p) 
  { 
    super( w/2, h-FLOOR_DIST, w, h, imsLd, "leftBugs2"); 
                     // positioned at the bottom of the panel, near the center
    period = p;
    setStep(0,0);  // no movement
  } // end of BatSprite()


  public void moveLeft()
  // start the ant moving left
  { 
    setStep(-XSTEP, 0);
    setImage("leftBugs2");
    loopImage(period, DURATION);   // cycle through the leftBugs2 images
  } // end of moveLeft()


  public void moveRight()
  // start the ant moving right
  { 
    setStep(XSTEP, 0); 
    setImage("rightBugs2");
    loopImage(period, DURATION);  // cycle through the images
  } // end of moveRight()


  public void stayStill()
  // stop the ant moving
  { setStep(0, 0); 
    stopLooping();
  }


  public void updateSprite() 
  // have the bat wrap-around at the walls
  {
    if ((locx+getWidth() <= 0) && (dx < 0))   // almost gone off lhs
      locx = getPWidth()-1;      // make it just visible on the right
    else if ((locx >= getPWidth()-1) && (dx > 0))  // almost gone off rhs
      locx = 1 - getWidth();     // make it just visible on the left

    super.updateSprite();
  } // end of updateSprite()



  public void mouseMove(int xCoord)
  // start the ant moving based on a mouse click
  {
   if (xCoord < locx)  // click was to the left of the bat
     moveLeft();       // make the bat move left
   else if (xCoord > (locx + getWidth()))  // click was to the right of the bat
     moveRight();      // make the bat move right
   else
     stayStill();
  }  // end of moveMove()

}  // end of BatSprite class