import java.applet.*;
import java.awt.*;
import java.awt.image.BufferedImage;


public class asd extends Applet{
    double prevRotation=0, boatRotation=0, x1, x2, y1, y2, i, r;
    BufferedImage img = new BufferedImage(500, 500, BufferedImage.TYPE_BYTE_BINARY);
    Graphics g1 = img.getGraphics();
    StringBuffer c = new StringBuffer("summon Boat ~ ~2 ~ {");
    String p = "}";
    boolean resize = true;


    /**********************************************************************/
    double length = 6*Math.PI;
    String riddenEntity = "Arrow, Riding:{id:MinecartRideable}";

    //Functions being graphed. Change length to show more/less
    public double f(double i){
        //return 6*Math.cos(5D/7D*i);    //length 7*PI
        //return 7.3*Math.cos(2D/5D*i);  //length 10*PI
        return 7.3*Math.cos(4D/3D*i);    //length 6*PI
        //return i;
    }
    /**********************************************************************/



    public void init(){
        setSize(500,500);
    }

    public void update(Graphics g){
        while(i<length){
            r = f(i);
            x1 = x2 = r*Math.cos(i);
            y1 = y2 = r*Math.sin(i);

            while(Math.pow((x2-x1)*(x2-x1)+(y2-y1)*(y2-y1), 0.5)<0.4){
                i+=0.00001;//instead of doing math let's use a *really* big loop =D
                r = f(i);
                x2 = r*Math.cos(i);
                y2 = r*Math.sin(i);
            }

            r = f(i-0.001);
            x1 = r*Math.cos(i-0.001);
            y1 = r*Math.sin(i-0.001);
            prevRotation = boatRotation;
            boatRotation= Math.atan((y2-y1)/(x2-x1))*57.2957;

            while(boatRotation<prevRotation){
                boatRotation+=180;
            }

            g1.fillRect(250+(int)(20*x2), 250+(int)(20*y2), 2, 2);
            c.append("Rotation:["+(int)(boatRotation*10)/10D+"F,0F],Riding:{id:Boat,");
            p+="}";
        }

        c.replace(c.length()-5, c.length(), riddenEntity+p);
        System.out.print(resize?(c.length()<16376?c:c+"\ntoo long for command block!"):"");
        resize=false;
        g.drawImage(img, 0, 0, null);
    }

    public void paint(Graphics g){
        update(g);
    }

}