import java.awt.Stroke;
import java.applet.*;
import java.awt.*;
import java.awt.event.*;
import static java.lang.Math.*;

/**
 *ATTRATTORE  DI LORENZ  3D  e stereo    applet realizzato  nel      08/2008    

 * 
 * @author   Sergio Savoldelli   wwww.savoldelli.net
 * @version  numero 2 *******3/20011
 * @version  numero 3 *******9/20011
 */

public class blorenzg2 extends java.applet.Applet

implements MouseListener, MouseMotionListener  {

    public double z = 0.02;
    public double pi=3.14159265;
    public double yz = 0.002;
    public double pi2=pi*2;

    public  int  mov1,mov2,mov3,mov4,k=6,n1=10,n2=1150,qq,q,a2,modulo,i, N= 3500,step,temp=1;
    public double x1,y1, z1,x0,z0,y0,xe,ye,ze,xeb,yeb,zeb;
    public double aa,k0,k02,xe2,ye2,xe2c,ye2c,x,y,xx,yy,t2, ee,r0,r02,val,w1;

    public  double h = 0.001, q3=0;
    public   double a = 6;
    public   double b = 24;
    public   double c = 4;

    Font font;
    Panel controlPanel, optionPanelColor, optionPanel0;

    Scrollbar sliderR, sliderr, sliderO;
    private boolean movingCircleOut = false;

    String sliderTextR = "       A  (1 - 1299): ";
    String sliderTextr = "       B (2 - 100): ";
    String sliderTextO = "       C (1 - 50): ";
    String sliderTextC = "          -      Stereo    -   ";

    Label sliderLabelR, sliderLabelr, sliderLabelO,  sliderLabelC,  titleLabel,titolotra;
    Checkbox insideCheckbox, outsideCheckbox;
    public double vertx[], verty[], vertz[]       ;
    public int  vertxb[],vertyb[],vertzb[],vertbzb[],  vertbzc[], vertzc[] ;
    Graphics imG;
    Image imBuffer;

    public void init() {
        setSize(780, 550); 
        vertx = new double[25500];  verty = new double[25500]; vertz = new double[25500];
        vertxb = new int[25500];vertyb = new int[25500];vertzb = new int[25500];vertzc = new int[25500];vertbzc = new int[25500];vertbzb = new int[25500];

        setBackground(Color.black);
        setLayout(new BorderLayout());

        q=0;

        controlPanel = new Panel();
        controlPanel.setLayout(new GridLayout(13,1));
        add("East", controlPanel);
        addMouseListener(this);
        addMouseMotionListener(this);

        titleLabel = new Label("ATTRATTORE DI LORENZ 3D ", 1); 
        font = new Font("Helvetica", Font.BOLD, 12);
        titleLabel.setFont(font);
        titleLabel.setBackground(Color.black);
        titleLabel.setForeground(Color.red);
        ////////////
        titolotra = new Label("CLICK AND DRAG       ", 2); 
        font = new Font("Helvetica", Font.BOLD, 12);
        titolotra.setFont(font);
        titolotra.setBackground(Color.black);
        titolotra.setForeground(Color.green);

        controlPanel.add(titleLabel);
        controlPanel.add(titolotra);

        sliderLabelR = new Label(sliderTextR + Integer.toString(n2));
        font = new Font("Helvetica", Font.PLAIN, 12);
        sliderLabelR.setFont(font);
        sliderLabelR.setBackground(Color.black);
        sliderLabelR.setForeground(Color.white);
        controlPanel.add(sliderLabelR);
        sliderR = new Scrollbar(Scrollbar.HORIZONTAL, n2, 0, 1,1300);
        controlPanel.add(sliderR);

        sliderLabelr = new Label(sliderTextr + Integer.toString(n1));
        font = new Font("Helvetica", Font.PLAIN, 12);
        sliderLabelr.setFont(font);
        sliderLabelr.setBackground(Color.black);
        sliderLabelr.setForeground(Color.white);
        controlPanel.add(sliderLabelr);
        sliderr = new Scrollbar(Scrollbar.HORIZONTAL, n1, 0, 2,101);
        controlPanel.add(sliderr);

        sliderLabelO = new Label(sliderTextO + Integer.toString(k));
        font = new Font("Helvetica", Font.PLAIN, 12);
        sliderLabelO.setFont(font);
        sliderLabelO.setBackground(Color.black);
        sliderLabelO.setForeground(Color.white);
        controlPanel.add(sliderLabelO);
        sliderO = new Scrollbar(Scrollbar.HORIZONTAL, k, 0, 1, 51);
        controlPanel.add(sliderO);

        controlPanel.add(new Label(" "));

        sliderLabelC = new Label(sliderTextC);

        CheckboxGroup CircleInOutGroup = new CheckboxGroup ();

        insideCheckbox = new Checkbox("si",  CircleInOutGroup, !movingCircleOut);
        outsideCheckbox = new Checkbox("no", CircleInOutGroup, movingCircleOut);
        insideCheckbox.setForeground(Color.green);
        outsideCheckbox.setForeground(Color.cyan);
        font = new Font("Helvetica", Font.BOLD, 12);
        insideCheckbox.setFont(font);
        outsideCheckbox.setFont(font);

        optionPanel0 = new Panel();
        optionPanel0.setLayout(new GridLayout(1, 3));
        font = new Font("Helvetica", Font.BOLD, 12);
        sliderLabelC.setFont(font);
        sliderLabelC.setBackground(Color.red);
        sliderLabelC.setForeground(Color.white);

        optionPanel0.add(insideCheckbox);

        optionPanel0.add(outsideCheckbox);

        controlPanel.add(new Label(" "));

        controlPanel.add(sliderLabelC,10);

        controlPanel.add("East", optionPanel0);

    }

    public boolean handleEvent(Event evt)

    {

        if (evt.target instanceof Scrollbar) {

            int value = ((Scrollbar)evt.target).getValue();
            if (evt.target == sliderR) {

                sliderLabelR.setText(sliderTextR + Integer.toString(value));
                n2 = value;
                if (n2 < 1)n2=1;

            } else if (evt.target == sliderr) {

                sliderLabelr.setText(sliderTextr + Integer.toString(value));
                n1 = value;
                if (n1 < 1)n1=1;

            } else if (evt.target == sliderO) {
                sliderLabelO.setText(sliderTextO + Integer.toString(value));
                k = value;

            } 

            repaint();

        }

        if (   evt.target == insideCheckbox || evt.target == outsideCheckbox) {
            repaint();

        }

        return true;
    }

    public void paint(Graphics g) {

        imBuffer = createImage (780, 550);
        imG = imBuffer.getGraphics ();

        imG.setColor (new Color(0,0,0));
        imG.fillRect(0,0,610,550);

        w1= 0.001;
        h=0.001+ w1/k;

        x0 = 0.1+ 0.1/n2;
        y0 =0.1+ 0.1/n1;
        z0 =0.1+ 0.1/n1;

        step= 7-k/10;

        a= 11;
        b=24;
        c=  4.01-4/n1;

        N=13500;
        for (i=0;i<N;i=i+1) {

            x1 = (x0 + h * a * (y0 - x0))*(1.001+h*5);
            y1 = y1 + h * (x0 * (b - z0) - y0)*(1.0001);
            z1 = (z0 + h * (x0 * y0 - c * z0))*(1.0015);

            x0 = x1;
            y0 = y1;
            z0 = z1;

            vertx[i]= x1;
            verty[i]=y1;
            vertz[i]=z1;
        }  

        x1 = 0.0;
        y1 = 0.0;
        z1 = 0.0;

        N=n2*10+500;
        for(a2=0;a2<=N;a2=a2+step){ 

            x0=vertx[a2];
            y0=verty[a2];
            z0= vertz[a2];

            xeb= (x0)*(Math.cos(z+0.2))*(8.8); 
            xe= x0*( Math.cos(z))*(8.8);

            yeb= y0*Math.sin(z+0.02)*(10);
            ye= y0* Math.sin(z)*(10);

            zeb=z0*  -(Math.cos(yz+0.02))*(5.8);
            ze=z0*  -(Math.cos(yz))*(5.8);

            k0=((xe)+319)+ye;
            r0= (ze)+290;

            k02=(xeb+329)+yeb;
            r02= (zeb)+300;

            k0=((xe)+329)+ye;
            r0= (ze)+300;

            k02=(xeb+319)+yeb;
            r02= (zeb)+290;

            if (outsideCheckbox.getState()){
                k02=-100;
                r02=-100;

            }

            vertzb[a2]=(int)k02;
            vertzc[a2]=(int)r02;

            vertbzb[a2]=(int)k0;
            vertbzc[a2]=(int)r0;

        }

        qq=0;

        N=n2*10+500;
        for (int q = 0; q <= N; q=q+step){
            qq= qq+1;

            vertzb[qq]= (int) vertzb[q];
            vertzc[qq]= (int)vertzc [q];

            vertbzb[qq]= (int)vertbzb[q];
            vertbzc[qq]=(int)vertbzc[q];

            imG.setColor(new Color(255,0,0));
            imG.drawOval(vertbzb[qq], vertbzc[qq],1,3);

            imG.setColor(new Color(0,255,0));//verde
            imG.drawOval(vertzb[qq], vertzc[qq],1,3);

        }

        imG.setColor(new Color(0,255,0));
        imG.drawPolygon (vertzb, vertzc, qq);

        imG.setColor(new Color(255,0,0));
        imG.drawPolygon (vertbzb, vertbzc,qq);

        g.drawImage(imBuffer,0,0,this);
        try{

            Thread.sleep(temp);
        }
        catch(InterruptedException e){

        }

    } 

    public void mouseClicked(MouseEvent e) { 

    } 

    public void mousePressed(MouseEvent e) {

        mov2 = e.getX();  int mov3 = e.getY();

        if (e.isMetaDown()) {
            temp= 1;
            repaint();
        }

        if (e.isAltDown()) {
            temp =100;
            repaint();}

    }

    public void mouseReleased(MouseEvent e){}

    public void mouseEntered(MouseEvent e) {}

    public void mouseExited(MouseEvent e)  {}

    public void mouseMoved(MouseEvent e) {}

    public void mouseDragged(MouseEvent e) {

        mov1 = e.getX();   mov4 = e.getY();

        z=z+0.015*((mov1-mov2));mov2=mov1;
        yz=yz +0.005* ((mov4-mov3));mov3=mov4;

        repaint();
        e.consume();
    }

}