DroidQuest/src/com/droidquest/items/Ghost.java

package com.droidquest.items;

import java.awt.Color;
import java.awt.Dimension;
import java.awt.Graphics;
import java.awt.Graphics2D;
import java.awt.image.BufferedImage;

import javax.swing.ImageIcon;

import com.droidquest.Room;
import com.droidquest.levels.Level;

public class Ghost extends Item 
{
int animationState = 0; // 0=Right, 1=Down,  2=Left, 3=Up
// x values are 42, 154, 266, 378
// y values are 58, 186, 314

transient boolean searched=false;
transient Item robot[];

public Ghost(int X, int Y, Room r) 
  {
	x=X; y=Y; room=r;
	width = 28; height = 32;
	grabbable = false;
	GenerateIcons();
  }

public void GenerateIcons() 
  {
	robot = new Item[4];
	icons = new ImageIcon[4];
	icons[0]= new ImageIcon(new BufferedImage(width,height,BufferedImage.TYPE_4BYTE_ABGR));
	icons[1]= new ImageIcon(new BufferedImage(width,height,BufferedImage.TYPE_4BYTE_ABGR));
	icons[2]= new ImageIcon(new BufferedImage(width,height,BufferedImage.TYPE_4BYTE_ABGR));
	icons[3]= new ImageIcon(new BufferedImage(width,height,BufferedImage.TYPE_4BYTE_ABGR));
	Graphics g;
	for (int a=0; a<4; a++)
	  {
	     try
	       {
		  g = icons[a].getImage().getGraphics();
	       }
	     catch (NullPointerException e)
	       {
		  System.out.println("Could not get Graphics pointer to " + getClass() + " Image");
		  return;
	       }
	     Graphics2D g2 = (Graphics2D) g;
	     Color transparent = new Color(0,0,0,0);
	     g2.setBackground(transparent);
	     g2.clearRect(0,0,width,height);
	     g.setColor(Color.red);
	     g.fillArc(0,0,28,32,0,180);
	     g.fillRect(0,16,28,16);
	     g.setColor(Color.white);
	     g.fillOval(4,8,8,8);
	     g.fillOval(16,8,8,8);
	     g.setColor(Color.black);
	     switch(a)
	       {
		case 0: // Right
		  g.fillOval(9,10,4,4);
		  g.fillOval(21,10,4,4);
		  break;
		case 1: // Down
		  g.fillOval(7,12,4,4);
		  g.fillOval(19,12,4,4);
		  break;
		case 2: // Left
		  g.fillOval(4,10,4,4);
		  g.fillOval(16,10,4,4);
		  break;
		case 3: // Up
		  g.fillOval(7,8,4,4);
		  g.fillOval(19,8,4,4);
		  break;
	       }
	  }
	currentIcon = icons[0].getImage();
  }

public void Animate() 
  {
	// Positions: There are 4x3=12 "nodes" where the ghost travels to
	// and from. Every time the ghost reaches a node position, it looks
	// around for any robots in the area. If it sees a robot it then
	// heads in that direction. Robots that are hit are put in the
	// penalty box and drained of energy. If no robot is found it moves
	// in a random direction.

	if (!searched)
	  {
	     int rcounter = 0;
	     for (int a=0; a<level.items.size(); a++)
	       {
		  Item item = (Item) level.items.elementAt(a);
		  if (item instanceof GenericRobot)
		    {
		       robot[rcounter] = item;
		       rcounter++;
		    }
	       }
	     searched=true;
	  }
	
	boolean flag = false;
	if ( ((x==42) || (x==154) || (x==266) || (x==378)) 
	  && ( (y==48) || (y==176) || (y==304)) )
	    flag=true;
	
	if (flag)
	  {
	     boolean decision = false;
	     for (int a=0; a<robot.length; a++)
	       {
		  if (robot[a] != null)
		    if (robot[a].room == room)
		      {
			 Dimension d = robot[a].GetXY();
			 if (d.width < 14*28)
			   {
			      int dx = (d.width + robot[a].width/2) - (x+width/2);
			      int dy = (d.height + robot[a].height/2) - (y+height/2);
			      if ((Math.abs(dx)<56) || (Math.abs(dy)<64))
				{
				   decision=true;
				   if (Math.abs(dx)<56)
				     {
					if (dy>0)
					  animationState=1;
					else
					  animationState=3;
				     }
				   else
				     {
					if (dx>0)
					  animationState=0;
					else
					  animationState=2;
				     }
				}
			   }
		      }
	       }
	       if (!decision)
	       {
		  boolean good;
		  int backwards = (animationState+2)%4;
		  do
		    {
		       good = true;
		       animationState = level.random.nextInt(4);
		       if (animationState==0 && x==378) good=false;
		       if (animationState==1 && y==304) good=false;
		       if (animationState==2 && x== 42) good=false;
		       if (animationState==3 && y== 48) good=false;
		       if (animationState==backwards)   good=false;
		    }
		  while (!good);
	       }
	  }
	
	switch (animationState)
	  {
	   case 0: // Right
	     MoveRight(4);
	     break;
	   case 1: // Down
	     MoveDown(4);
	     break;
	   case 2: // Left
	     MoveLeft(4);
	     break;
	   case 3: // Up
	     MoveUp(4);
	     break;
	  }
	currentIcon = icons[animationState].getImage();

	for (int a=0; a<4; a++)
	  if (robot[a] != null)
	    if (Overlaps(robot[a]))
	      {
		 robot[a].charge=0;
		 level.PlaySound(room, Level.DISCHARGESOUND);
		 robot[a].x = 16*28+14;
		 robot[a].y = 32;
	      }
  }
}