import java.awt.*;
import java.util.Vector;

public class Bullet extends Icobj 
{
   final static double lost = 0.01; // each transfer consumes energy
   final static int cohesion = 2;   // influence area
    
   double energy;
   
   public Bullet(String n,int x, int y,int r,double e){ 
      super(n,x,y); color = Color.green; radius = r; energy = e; 
   }
   public String toString(){ return name; }
   public void moveRight(){ 
      if(x<workspace.size().width-radius) x+=energy/10; 
   }

   // each transfer consumes energy
   protected void transfer(Bullet giver,Bullet receiver,double e){
        if (e>lost) receiver.energy+=(e-lost); 
        giver.energy-=e;      
   }

   protected void giveEnergy(){  
      Vector icobjs = workspace.icobjsInInfluence(this,cohesion);
      int num = 0;
      for(int i=0;i<icobjs.size();i++){
         Icobj other = (Icobj)icobjs.elementAt(i);
         if (!(other instanceof Bullet)) continue; 
         num++;
      }
      if (num <= 1) return;
      double quantum = energy/num;
      for(int i=0;i<icobjs.size();i++){
         Icobj other = (Icobj)icobjs.elementAt(i);
         if (!(other instanceof Bullet)) continue;
         Bullet bullet = (Bullet)other;
         transfer(this,bullet,quantum);
      }
   }
}