/**
 *  Hunter-Prey simulator version 1.1
 *  Copyright 2011 Kenneth Mackin
 */
public class HunterAgent extends Agent{
    double randomrate; //rate of random vs. shortest path
    int xoffset, yoffset; //target offset for shortest path goal

    HunterAgent(Field field, int x, int y, int index, double param1, double param2, double param3){
	super(field, x, y, index);
	randomrate = param1;
	xoffset = (int)param2;
	yoffset = (int)param3;
    }

    public void move(){
	if(Math.random()<randomrate){ //random walk
	    this.x += ((Math.random()*3)-1);
	    this.y += ((Math.random()*3)-1);
	}else{                        //shortest path
	    if(field.getX(0)+xoffset>this.x){
		x++;
	    }else if(field.getX(0)+xoffset<this.x){
		x--;
	    }
	    if(field.getY(0)+yoffset>this.y){
		y++;
	    }else if(field.getY(0)+yoffset<this.y){
		y--;
	    }
	}

	//check for out of bounds
	if(x<0) x=0;
	if(x>=field.getWidth()) x=field.getWidth()-1;
	if(y<0) y=0;
	if(y>=field.getHeight()) y=field.getHeight()-1;
    }
}