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package make_noise;
import java.util.ArrayList;
/**
 * Created by LENOVO on 25-10-2015.
 */

public class make
{
    ArrayList<String> noise;
    int h,k;  // the centre for noise propagation
    int r; //the radius of the intensity of the noise;
    int arraywidth;

    public make(int h,int k,int r,int arraywidth)
    {
        noise=new ArrayList<String>();
        this.h=h;
        this.k=k;
        this.r=r;
        this.arraywidth=arraywidth;
        shout();
    }

    private void shout()
    {
        //function that computes the noise coordinates

            for(int i=0;i<=r;i++)
            draw_noise_at_level(i,1);

       for(int i=r+1;i<=arraywidth;i++)
        draw_noise_at_level(i,(i-r)+1);

        filter();
        remove_duplicates();

        //for(int i=0;i<noise.size();i++)
        //System.out.println(noise.get(i));

      /*  for(int i=0;i<noise.size();i++)
            System.out.println(noise.get(i));*/

    }

    private void draw_noise_at_level(int level,int step)

    // level signifies radius of the circle
    // step signifies the number of bits to be left
    // while the noise propagates

    {
        if(level==0) //not bothering if the radius is zero
        {
            noise.add(h+","+k);
            return;
        }

        int x,y,xend;

        xend=level/(int)Math.sqrt(2);

        x=0;

        while(x<xend)
        {
            y=(int)Math.sqrt(level*level-x*x);

            noise.add((x+h)+","+(y+k));
            noise.add((y+h)+","+(x+k));
            noise.add((-x+h)+","+(y+k));
            noise.add((x+h)+","+(-y+k));
            noise.add((-x+h)+","+(-y+k));
            noise.add((-y+h)+","+(x+k));
            noise.add((y+h)+","+(-x+k));
            noise.add((-y+h)+","+(-x+k));

            x=x+step;
        }
    }

    private void filter()
    {
        //function to remove the negetive

        ArrayList<String> tmp=new ArrayList<>();

        for(int i=0;i<noise.size();i++)
        {
            String[] array=noise.get(i).split(",");
            int n1=Integer.parseInt(array[0]);
            int n2=Integer.parseInt(array[1]);
            if(n1>0 && n2>0)
            {
                tmp.add(noise.get(i));
                //System.out.println(noise.get(i));
            }
        }

        noise.clear();

        for(int i=0;i<tmp.size();i++)
        {
            noise.add(tmp.get(i));
         //   System.out.println(tmp.get(i));
        }

        tmp.clear();

    }

    private void remove_duplicates()
    {
        //to remove duplicate noise coordinates

        ArrayList<String> tmp=new ArrayList<String>();
        int check;
        for(int i=0;i<noise.size();i++)
        {
            String str=noise.get(i);
            check=0;
            for(int j=0;j<tmp.size();j++)
            {
             if(str.equals(tmp.get(j))==true)
             {
                 check++;
             }
            }
            if(check==0)
                tmp.add(str);
        }
        noise.clear();

        for(int i=0;i<tmp.size();i++)
            noise.add(tmp.get(i));
    }

    public ArrayList<String> get_noise()
    {
        return noise;
    }

}