//Ryan Ko
//Period 5
//Lab A9.2

import gpdraw.*;
import java.util.Scanner;

public class KochCurve{
    private DrawingTool myPencil;
    private SketchPad myPaper;
    private Scanner in;
    private double length;
    private int x,y,count;

    //Constructor
    public KochCurve(){
        myPaper = new SketchPad(800,800);
        myPencil = new DrawingTool(myPaper);
        in = new Scanner(System.in);
        length=400;
        x=y=count=0;
    }

    //Gets Koch Level
    public void getLevelNum(){
        myPencil.up();
        myPencil.move(-200,199);
        myPencil.move(-200,200);
        myPencil.down();
        myPencil.turnRight();
        System.out.print("Koch Curve Level: ");
        x = in.nextInt();

       //For-loop used in order to create full snowflake
        for(count=1; count<=3; count++){
          y=x;
          drawKochCurve(y);
          length=(length*3);
          myPencil.turnRight(120);
       }
    }

    //Draws Koch Curve
    public void drawKochCurve(int y){
      //sets new length to 1/3 of the previous one
      length = (length/3);

      //base case
      if(y==0){
        myPencil.forward(length);
        myPencil.turnLeft(60);
        myPencil.forward(length);
        myPencil.turnRight(120);
        myPencil.forward(length);
        myPencil.turnLeft(60);
        myPencil.forward(length);
      }
      //recursion initiators
      else{
        drawKochCurve(y-1);
        length=(length*3);
        myPencil.turnLeft(60);
        drawKochCurve(y-1);
        length=(length*3);
        myPencil.turnRight(120);
        drawKochCurve(y-1);
        length=(length*3);
        myPencil.turnLeft(60);
        drawKochCurve(y-1);
        length=(length*3);
      }
    }
}