Sierpiappletline

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Se non è possibile vedere l'applet, puoi realizzare l'applet da solo, qui sotto c'è il listato, non sarà scritto come prescritto dalle convenzioni Java ma funziona bene lo stesso.
Con questo applet potrai realizzzare tutte le immagini che vedi nelle pagine che parlano del triangolo di Sierpinski.

Con la barra di scorrimento (a) Scegli l'algoritmo, le 16 scelte possibili sono variazioni sul tema.
Con le barre (b) e (c) si regolano il numero dei triangoli, con (d) si ha l'effetto zoom.

Listato dell'applet.

import java.awt.Stroke;
import javax.swing.*;          
import java.awt.*;
import java.awt.event.*;
import javax.swing.event.*;
import java.awt.image.*;

import static java.lang.Math.*;

/**
 * 
 * Class  Sierpinski_line3D2
 * @author (Sergio Savoldelli. -  www.savoldelli.net  & - www.colognola.com 
 * @version (number 1. - 1/2016 )
 *  Suggerisco 830 pixels di larghezza per 700 di altezza
 *   L'utilizzo di questo listato è libero, ma la pubblicazione della fonte sarebbe gradita.  
 */

public class Sierpinski_line3D2 extends JApplet
implements MouseListener, MouseMotionListener  {

public  int  mov1,mov2,mov3,mov4,n4=2,n1=13,n2=3,n3= 4, nux1,nuy1,nux2,nuy2,cox,w,h,colz, pieno,bb,cc,dd,ee,b1,c1,d1,e1;

public double a,aa,hh,pi2= PI*2, z,yz,
    sdr,sdi,zr,zi,nx,ny,nz,lato,latoa,pr1,x2,y2,pr2,
    k1,k2,k3,k4,k5,k6,k7,k1b,k2b,k3b,k4b,k5b,k6b,x1, x3,x4,x5,x6,x7,x8,y1,y3,y4,y5,y6,y7,y8,xini,yini;

public int vertx2b[], verty2b[],vertx1b[], verty1b[];

public String commenta;
    Font font,fontb;
    Panel controlPanel, optionPanelColor, optionPanel0;

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

String sliderTextR = "a = (1 - 16): ";
    String sliderTextr = "b = (1 - 8): ";
    String sliderTextO = "d = (1 - 255): ";
    String sliderTextC = "  Color  ? ";
    String sliderTextn = "c =   (1 - 420) ";
    Label sliderLabelR, sliderLabelr, sliderLabelO,  sliderLabelC, sliderLabeln,   titleLabel, clicLabel,clicLabel2;
    Checkbox insideCheckbox, outsideCheckbox,nocircleCheckbox,sicircleCheckbox;

public void init() {

setLayout(new BorderLayout());
        controlPanel = new Panel();
        controlPanel.setBackground(Color.black);
        controlPanel.setLayout(new GridLayout(16,1));
        add("East", controlPanel);
        addMouseListener(this);
        addMouseMotionListener(this);

titleLabel = new Label( "Sierpinski_line ", 1); 
        font = new Font("Helvetica", Font.BOLD, 17);
        titleLabel.setFont(font);
        titleLabel.setBackground(Color.black);
        titleLabel.setForeground(Color.red);
        controlPanel.add(titleLabel);
        controlPanel.add(new Label("           "));

sliderLabelR = new Label(sliderTextR + Integer.toString ((int)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, (int)n1, 1, 1,17);
        sliderR.setBackground(Color.blue);
        controlPanel.add(sliderR);

sliderLabelr = new Label(sliderTextr + Integer.toString((int)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,(int) n2, 1, 1, 9);
        sliderr.setBackground(Color.blue);
        controlPanel.add(sliderr);

sliderLabeln = new Label(sliderTextn + Integer.toString((int)n3));
        font = new Font("Helvetica", Font.PLAIN, 12);
        sliderLabeln.setFont(font);
        sliderLabeln.setBackground(Color.black);
        sliderLabeln.setForeground(Color.white);
        controlPanel.add(sliderLabeln);

slidern = new Scrollbar(Scrollbar.HORIZONTAL,(int) n3, 1, 1,421);
        slidern.setBackground(Color.blue);
        controlPanel.add(slidern);

sliderLabelO = new Label(sliderTextO + Integer.toString((int)n4));
        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, (int)n4, 1, 1, 256);
        sliderO.setBackground(Color.blue);
        controlPanel.add(sliderO);

clicLabel2 = new Label(" ");
        fontb = new Font("Helvetica", Font.PLAIN, 13);
        clicLabel2.setFont(fontb);
        clicLabel2.setBackground(Color.black);
        clicLabel2.setForeground(Color.white);
        controlPanel.add(clicLabel2);

clicLabel = new Label("");
        fontb = new Font("Helvetica", Font.PLAIN, 12);
        clicLabel.setFont(fontb);
        clicLabel.setBackground(Color.black);
        clicLabel.setForeground(Color.white);
        controlPanel.add(clicLabel);

sliderLabelC = new Label(sliderTextC);
        font = new Font("Helvetica", Font.BOLD, 18);
        sliderLabelC.setFont(font);
        sliderLabelC.setBackground(Color.black);
        sliderLabelC.setForeground(Color.white);
        controlPanel.add(sliderLabelC,12);

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, 18);

insideCheckbox.setFont(font);
        outsideCheckbox.setFont(font);

optionPanel0 = new Panel();
        optionPanel0.setLayout(new GridLayout(1, 2));

optionPanel0.add(insideCheckbox);
        optionPanel0.add(outsideCheckbox);

controlPanel.add("East", optionPanel0);

vertx2b=new int[500]; 
        verty2b=new int[500]; 
        vertx1b=new int[500]; 
        verty1b=new int[500];

}

public boolean handleEvent(Event ev)

{
        if (ev.target instanceof Scrollbar) {

int value = ((Scrollbar)ev.target).getValue();
            if (ev.target == sliderR) {
                sliderLabelR.setText(sliderTextR + Integer.toString(value));
                n1 = value;

} else if (ev.target == sliderr) {
                sliderLabelr.setText(sliderTextr + Integer.toString(value));
                n2 = value;

} else if (ev.target == slidern) {
                sliderLabeln.setText(sliderTextn + Integer.toString(value));
                n3 = value;

} else if (ev.target == sliderO) {
                sliderLabelO.setText(sliderTextO + Integer.toString(value));
                n4 = value;

}

repaint();

}

if (   ev.target == insideCheckbox || ev.target == outsideCheckbox ) {

repaint();

}

return true;
    }

public void paint(Graphics g) {
        w = getSize().width -130;  h = getSize().height;

Graphics2D g2 = (Graphics2D)g;

BufferedImage bufimage;

Graphics2D bufimagegraf,bufimagegrafb,bufimagegraff ;

if (outsideCheckbox.getState()){

colz=255;
        }

if (insideCheckbox.getState()){
            colz=0;

}

bufimage = new BufferedImage(w, h, BufferedImage.TYPE_4BYTE_ABGR);
        bufimagegraf= bufimage.createGraphics();
        bufimagegraf.setRenderingHint(RenderingHints.KEY_ANTIALIASING, RenderingHints.VALUE_ANTIALIAS_ON);
        bufimagegraf.setStroke(new BasicStroke(1.0f));
        bufimagegraf.setColor(new Color(0,255,0));
        bufimagegraf.setFont( new Font("Helvetica", Font.PLAIN, 18));

bufimagegrafb= bufimage.createGraphics();
        bufimagegrafb.setRenderingHint(RenderingHints.KEY_ANTIALIASING, RenderingHints.VALUE_ANTIALIAS_ON);
        bufimagegrafb.setStroke(new BasicStroke(1.0f));
        bufimagegrafb.setFont( new Font("Helvetica", Font.PLAIN, 18));
        bufimagegrafb.setColor(new Color(255,255,0));
        bufimagegraf.clearRect(0,0,w, h);

bufimagegraff= bufimage.createGraphics();
        bufimagegraff.setRenderingHint(RenderingHints.KEY_ANTIALIASING, RenderingHints.VALUE_ANTIALIAS_ON);
        bufimagegraff.setStroke(new BasicStroke(1.0f));
        bufimagegraff.setColor(new Color(255,0,0));
        switch(n1){

case 1:
                  n2= 2;n3=4; n4=5;
           
            xini= w/2;yini= h/3;
            pr1=2.10;

for(k4b=-3.141592; k4b<= PI; k4b=k4b+(pi2/n3)){
                for(k4=-3.141592-pr1; k4<= 3.141592-pr1; k4=k4+(pi2/n2)){

lato=18*n4;
                    x5 = (Math.cos(k4)*cos(k4b+z)*lato);
                    y5 = (Math.sin(k4)*lato);
                    xini=xini+x5;yini=yini+y5;

for(k3b=-3.141592; k3b<= PI; k3b=k3b+(pi2/n3)){
                        for(k3=-3.141592-pr1; k3<= 3.141592-pr1; k3=k3+(pi2/n2)){

lato= 36*n4;

x4 = (Math.cos(k3)*cos(k3b+z)*lato);
                            y4 = (Math.sin(k3)*lato);
                            xini=xini+x4;yini=yini+y4;

for(k2b=-3.141592; k2b<= PI; k2b=k2b+(pi2/n3)){ 
                                for(k2=-3.141592-pr1; k2<= 3.141592-pr1; k2=k2+(pi2/n2)){

lato=9*n4;

x3 = (Math.cos(k2)*cos(k2b+z)*lato);
                                    y3 = (Math.sin(k2)*lato);
                                    xini=xini+x3;yini=yini+y3;

for(k1b=-3.141592; k1b<= PI; k1b=k1b+(pi2/n3)){
                                        for(k1=-3.141592-pr1; k1<= 3.141592-pr1; k1=k1+(pi2/3)){

lato= 9*n4;

x1 =  (Math.cos(k1)*cos(k1b+z+k4b)*lato);
                                            y1 = (Math.sin(k1)*lato);

x2= (xini+x1);
                                            y2= (yini+y1);

bufimagegrafb.setColor(new Color(255,colz,255));

bufimagegrafb.drawLine ((int)(xini), (int)(yini),(int)(x2),(int)(y2));

xini=x2;yini=y2;

}}}}}}}}
                commenta = ( "Le Barre (b), (c), (d), sono disabilitate; usa il mouse");
            break;

case 2: 
               n2= 2;n3=4; n4=n4;
              xini= w/2;yini= h/1.25;
            pr1= 2.1;
            ee=0;

for(k6b=-3.141592; k6b<= 0; k6b=k6b+(pi2/n3)){
                for(k6=-3.141592+pr1; k6<= 3.1415921+pr1; k6=k6+(pi2*3)){

lato=144*n4;

x7 = cos(k6b)*1;
                    xini=xini+x7;

for(k5=-3.1415921; k5<= 3.141592; k5=k5+(pi2/3)){;

lato=72*n4;
                        x6 = (Math.cos(k5)*cos(k6b+z)*lato);
                        y6 =(Math.sin(k5)*lato);
                        xini=xini+x6;yini=yini+y6;

for(k4=-3.141592+pr1; k4<= 3.141592+pr1; k4=k4+(pi2/3)){ ;

lato=36*n4;

x5 = (Math.cos(k4)*cos(k6b+z)*lato);
                            y5 = (Math.sin(k4)*lato);
                            xini=xini+x5;yini=yini+y5;

for(k3=-3.141592+pr1; k3<= 3.141592+pr1; k3=k3+(pi2/3)){;

lato=18*n4;

x4 = (Math.cos(k3)*cos(k6b+z)*lato);
                                y4 = (Math.sin(k3)*lato);
                                xini=xini+x4;yini=yini+y4;

for(k2=-3.141592+pr1; k2<= 3.141592+pr1; k2=k2+(pi2/3)){

lato=9*n4;

x3 = (Math.cos(k2)*cos(k6b+z)*lato);
                                    y3 = (Math.sin(k2)*lato);
                                    xini=xini+x3;yini=yini+y3;
                                    cox=0;
                                    ee=ee+35;
                                    for(k1b=-3.141592; k1b<= 3.141592; k1b=k1b+(pi2/3)){
                                        for(k1=-3.141592+pr1; k1<= 3.141592+pr1; k1=k1+(pi2/3)){

lato= 9*n4;

x1 =  (Math.cos(k1)*cos(k6b+z)*lato);
                                            y1 = (Math.sin(k1)*lato);

x2= (xini+x1);
                                            y2= (yini+y1);

vertx2b[cox]= (int)(x2);
                                            verty2b[cox]= (int) (y2);

cox=cox+1;
                                            ee=ee+10;

xini=x2;yini=y2;

}
                                        {         
                                            ee= (int)((ee) %255);
                                            bb= vertx2b[0];  cc= vertx2b[1]; dd= vertx2b[2]; 
                                            b1= verty2b[0];  c1= verty2b[1]; d1= verty2b[2];

vertx1b[0] = bb;
                                            vertx1b[1] = cc;
                                            vertx1b[2] =dd;

verty1b[0] = b1;
                                            verty1b[1] = c1;
                                            verty1b[2] =d1;

bufimagegrafb.setColor(new Color(255-ee,colz,ee,110  ));

bufimagegrafb.fillPolygon(vertx1b,verty1b,3);

}
                                    }}}}}}}
                   commenta = ( "Le Barre (b), (c),  sono disabilitate; usa il mouse");                 
                                   
            break;

case 3:
              n2= 3;n3=3; n4=n4;
              xini= w/2;yini= h/1.25;
                 pr1= n3*0.005;

for(k6b=-3.141592; k6b<= 3.141592; k6b=k6b+(pi2/4)){
                for(k6=-3.141592+pr1; k6<= 3.1415921+pr1; k6=k6+(pi2*n2)){

lato=144*n4;

for(k5=-3.1415921; k5<= 3.141592; k5=k5+(pi2/n2)){;
                        lato=72*n4;

x6 = (Math.cos(k5)*cos(k6b+z)*lato);
                        y6 =(Math.sin(k5)*lato);
                        xini=xini+x6;yini=yini+y6;

for(k4=-3.141592+pr1; k4<= 3.141592+pr1; k4=k4+(pi2/n2)){ ;

lato=36*n4;
                            x5 = (Math.cos(k4)*cos(k6b+z)*lato);
                            y5 = (Math.sin(k4)*lato);
                            xini=xini+x5;yini=yini+y5;

for(k3=-3.141592+pr1; k3<= 3.141592+pr1; k3=k3+(pi2/n2)){;

lato=18*n4;

x4 = (Math.cos(k3)*cos(k6b+z)*lato);
                                y4 = (Math.sin(k3)*lato);
                                xini=xini+x4;yini=yini+y4;

for(k2=-3.141592+pr1; k2<= 3.141592+pr1; k2=k2+(pi2/n2)){

lato=9*n4;

x3 = (Math.cos(k2)*cos(k6b+z)*lato);
                                    y3 = (Math.sin(k2)*lato);
                                    xini=xini+x3;yini=yini+y3;

for(k1=-3.141592+pr1; k1<= 3.141592+pr1; k1=k1+(pi2/3)){

lato= 9*n4;

x1 =  (Math.cos(k1)*cos(k6b+z)*lato);
                                        y1 = (Math.sin(k1)*lato);

x2= (xini+x1);
                                        y2= (yini+y1);

bufimagegrafb.setColor(new Color(255,colz,255));

bufimagegrafb.drawLine ((int)(xini), (int)(yini),(int)(x2),(int)(y2));

xini=x2;yini=y2;

}}}}}} }
               commenta = ( "Le Barre (b), (c),  sono disabilitate; usa il mouse, prova con (d=2)");    
            break;
            
            
            case 4:
              n2= 2;n3=3; n4=3; 
              xini= w/2;yini= h/7;
          
             pr1= 277*0.015;
            
                              ee=0;
                     for(k5b=-3.141592; k5b<= 3.141592; k5b=k5b+(pi2/3)){
                    for(k5=-3.1415921+pr1; k5<= 3.141592+pr1; k5=k5+(pi2/2)){;
                        
                        lato=72*n4;

x6 = (Math.cos(k5)*cos(k5b+z)*lato);
                        y6 =(Math.sin(k5)*lato);
                        xini=xini+x6;yini=yini+y6;

for(k4b=-3.141592; k4b<= 3.141592; k4b=k4b+(pi2/n3)){
                        for(k4=-3.141592+pr1; k4<= 3.141592+pr1; k4=k4+(pi2/2)){ ;
                            
                           
                            lato=36*n4;
                            
                            x5 = (Math.cos(k4)*cos(k4b+z)*lato);
                            y5 = (Math.sin(k4)*lato);
                            xini=xini+x5;yini=yini+y5;
                            
                                 
                              for(k3b=-3.141592; k3b<= 3.141592; k3b=k3b+(pi2/n3)){
                            for(k3=-3.141592+pr1; k3<= 3.141592+pr1; k3=k3+(pi2/2)){;
                                
                                
                                
                                lato=18*n4;

x4 = (Math.cos(k3)*cos(k3b+z)*lato);
                                y4 = (Math.sin(k3)*lato);
                                xini=xini+x4;yini=yini+y4;
                                
                                 ee=ee+n2;

for(k2b=-3.141592; k2b<= 3.141592; k2b=k2b+(pi2/n3)){ 
                                for(k2=-3.141592+pr1; k2<= 3.141592+pr1; k2=k2+(pi2/2)){
                                                                   
                                    lato=9*n4;

x3 = (Math.cos(k2)*cos(k2b+z)*lato);
                                    y3 = (Math.sin(k2)*lato);
                                    xini=xini+x3;yini=yini+y3;
                                    
                                     cox=0;
                                     
                                           for(k1b=-3.141592; k1b<= 3.141592; k1b=k1b+(pi2/n3)){
                                    for(k1=-3.141592+pr1; k1<= 3.141592+pr1; k1=k1+(pi2/3)){
                                      
                                        lato= 9*n4;

x1 =  (Math.cos(k1)*cos(k2b+z)*lato);
                                        y1 = (Math.sin(k1)*lato);

x2= (xini+x1);
                                        y2= (yini+y1);
                                        
                                        vertx2b[cox]= (int)(x2);
                                        verty2b[cox]= (int) (y2);

cox=cox+1;
                                        ee= (int)(150+xini)%255;

xini=x2;yini=y2;

}
                                {         
                                       
                                        bb= vertx2b[0];  cc= vertx2b[1]; dd= vertx2b[2]; 
                                        b1= verty2b[0];  c1= verty2b[1]; d1= verty2b[2];

vertx1b[0] = bb;
                                        vertx1b[1] = cc;
                                        vertx1b[2] =dd;
                                        
                                        verty1b[0] = b1;
                                        verty1b[1] = c1;
                                        verty1b[2] =d1;
                                        
                                         
                                          bufimagegrafb.setColor(new Color(255,colz,255 ));
                                          bufimagegrafb.drawPolygon(vertx1b,verty1b,3);

}
                                }}}}}}}} } 
                                
                                 commenta = ( "Le Barre (b), (c),(d)  sono disabilitate; usa il mouse");    
            break;
            
            
             case 5:
              n2= 3; n4=3; 
              xini= w/2;yini= h/2;
               pr1=PI/2;

for(k6b=-3.141592; k6b<= 3.141592; k6b=k6b+(pi2/(n3+3))){
                
                    for(k5=-3.1415921-pr1; k5<= 3.141592-pr1; k5=k5+(pi2/n2)){;
                       
                        lato=72*n4;

x6 = (Math.cos(k5)*cos(k6b+z)*lato);
                        y6 =(Math.sin(k5)*sin(k6b+PI)*lato);
                        xini=xini+x6;yini=yini+y6;

for(k4=-3.141592+pr1; k4<= 3.141592+pr1; k4=k4+(pi2/n2)){ ;
                            
                            lato=36*n4;

x5 = (Math.cos(k4)*cos(k6b+z)*lato);
                            y5 = (Math.sin(k4)*sin(k6b+PI)*lato);
                            xini=xini+x5;yini=yini+y5;

for(k3=-3.141592+pr1; k3<= 3.141592+pr1; k3=k3+(pi2/n2)){;
                                lato=18*n4;

x4 = (Math.cos(k3)*cos(k6b+z)*lato);
                                y4 = (Math.sin(k3)*sin(k6b+PI)*lato);
                                xini=xini+x4;yini=yini+y4;

for(k2=-3.141592+pr1; k2<= 3.141592+pr1; k2=k2+(pi2/n2)){
                                    
                                    lato=9*n4;

x3 = (Math.cos(k2)*cos(k6b+z)*lato);
                                    y3 = (Math.sin(k2)*sin(k6b+PI)*lato);
                                    xini=xini+x3;yini=yini+y3;

for(k1=-3.141592+pr1; k1<= 3.141592+pr1; k1=k1+(pi2/3)){
                                      
                                        lato= 9*n4;

x1 =  (Math.cos(k1)*cos(k6b+z)*lato);
                                        y1 = (Math.sin(k1)*sin(k6b+PI)*lato);

x2= (xini+x1);
                                        y2= (yini+y1);

bufimagegrafb.setColor(new Color(255,colz,255));

bufimagegrafb.drawLine ((int)(xini), (int)(yini),(int)(x2),(int)(y2)); 
                                        
                                        xini=x2;yini=y2;

}}}}}  }
                                     commenta = ( "Le Barre (b), (d)  sono disabilitate; usa il mouse, prova con (c= 3)");

break;

case 6:
              n2= 3; n4=n4; 
              xini= w/2;yini= h/2;
                pr1= (PI/2);
            
            for(k6b=-3.141592-pr1; k6b<= 3.141592-pr1; k6b=k6b+(pi2/(n3))){

for(k5=-3.1415921-pr1; k5<= 3.1415921-pr1; k5=k5+(pi2/n2)){;
                        
                        lato=72*n4;

x6 = (Math.cos(k5)*cos(k6b+z)*lato);
                        y6 =(Math.sin(k5)*cos(k6b+yz)*lato);
                        xini=xini+x6;yini=yini+y6;

for(k4=-3.141592+pr1; k4<= 3.141592+pr1; k4=k4+(pi2/n2)){ ;
                            
                            lato=36*n4;

x5 = (Math.cos(k4)*cos(k6b+z)*lato);
                            y5 = (Math.sin(k4)*cos(k6b+yz)*lato);
                            xini=xini+x5;yini=yini+y5;

for(k3=-3.141592+pr1; k3<= 3.141592+pr1; k3=k3+(pi2/n2)){;
                               
                                lato=18*n4;

x4 = (Math.cos(k3)*cos(k6b+z)*lato);
                                y4 = (Math.sin(k3)*cos(k6b+yz)*lato);
                                xini=xini+x4;yini=yini+y4;

for(k2=-3.141592+pr1; k2<= 3.141592+pr1; k2=k2+(pi2/n2)){
                                   
                                    lato=9*n4;

x3 = (Math.cos(k2)*cos(k6b+z)*lato);
                                    y3 = (Math.sin(k2)*cos(k6b+yz)*lato);
                                    xini=xini+x3;yini=yini+y3;

for(k1=-3.141592+pr1; k1<= 3.141592+pr1; k1=k1+(pi2/3)){
                                        
                                        lato= 9*n4;

x1 =  (Math.cos(k1)*cos(k6b+z)*lato);
                                        y1 = (Math.sin(k1)*cos(k6b+yz)*lato);

x2= (xini+x1);
                                        y2= (yini+y1);

bufimagegrafb.setColor(new Color(255,colz,255));

bufimagegrafb.drawLine ((int)(xini), (int)(yini),(int)(x2),(int)(y2)); 
                                        
                                        xini=x2;yini=y2;

}}}}} }              
                          commenta = ( "Le Barra (b),  è disabilitata, prova con (c=3), (d=3); usa il mouse");              
                 break;

case 7:
                  
              n2= 3; n4=n4; 
              xini= w/2;yini= h/2;
               pr1= (pi2/(2));

for(k6b=-3.141592; k6b<= 3.141592; k6b=k6b+(pi2/(1+n3))){

for(k5=-3.1415921-pr1; k5<= 3.1415921-pr1; k5=k5+(pi2/n2)){;
                        
                        lato=72*n4*0.5;

x6 = (Math.cos(k5)*cos(k6b+z)*lato);
                        y6 =(Math.sin(k5)*cos(k6b+yz)*lato);
                        xini=xini+x6;yini=yini+y6;

for(k4=-3.141592+pr1; k4<= 3.141592+pr1; k4=k4+(pi2/n2)){ ;
                            
                            lato=36*n4*0.5;

x5 = (Math.cos(k4)*cos(k6b+z)*lato);
                            y5 = (Math.sin(k4)*cos(k6b+yz)*lato);
                            xini=xini+x5;yini=yini+y5;

for(k3=-3.141592+pr1; k3<= 3.141592+pr1; k3=k3+(pi2/n2)){;
                               
                                lato=18*n4*0.5;

x4 = (Math.cos(k3)*cos(k6b+z)*lato);
                                y4 = (Math.sin(k3)*cos(k6b+yz)*lato);
                                xini=xini+x4;yini=yini+y4;

for(k2=-3.141592+pr1; k2<= 3.141592+pr1; k2=k2+(pi2/n2)){
                                   
                                    lato=9*n4*0.5;

x3 = (Math.cos(k2)*cos(k6b+z)*lato);
                                    y3 = (Math.sin(k2)*cos(k6b+yz)*lato);
                                    xini=xini+x3;yini=yini+y3;

for(k1=-3.141592+pr1; k1<= 3.141592+pr1; k1=k1+(pi2/3)){
                                        
                                        lato= 9*n4*0.5;

x1 =  (Math.cos(k1)*cos(k6b+z)*lato);
                                        y1 = (Math.sin(k1)*cos(k6b+yz)*lato);

x2= (xini+x1);
                                        y2= (yini+y1);

bufimagegrafb.setColor(new Color(255,colz,255));

bufimagegrafb.drawLine ((int)(2+xini), (int)(1+yini),(int)(2+x2),(int)(1+y2)); 
                                        
                                        xini=x2;yini=y2;
                                       
                                    }}}}} }                  
                      commenta = ( "Le Barra (b),  è disabilitata prova con (c=7), (d=3)  ; usa il mouse");        
                                    
                 break;

case 8:
              n2= 3; n3=3; n4=1; 
              xini= w/2;yini= h/2.5;
               pr1= 419*0.01;
            for(k6b=-3.141592+pr1; k6b <= PI+pr1; k6b=k6b+(pi2/3)){
               
               
                for(k6=-3.141592+pr1; k6<= 3.1415921+pr1; k6=k6+(pi2/n2)){
                
                   lato=144*n4;
                   
                    x7 = cos(k6)*cos(k6b+z)*lato;
                    y7 = sin(k6)*lato;
                   xini=xini+x7;yini=yini+y7;

for(k5=-3.1415921+pr1; k5<= 3.141592+pr1; k5=k5+(pi2/n2)){;
                       
                        lato=72*n4;

x6 = (Math.cos(k5)*cos(k6b+z)*lato);
                        y6 =(Math.sin(k5)*lato);
                        xini=xini+x6;yini=yini+y6;

for(k4=-3.141592+pr1; k4<= 3.141592+pr1; k4=k4+(pi2/n2)){ ;
                           
                            lato=36*n4;

x5 = (Math.cos(k4)*cos(k6b+z)*lato);
                            y5 = (Math.sin(k4)*lato);
                            xini=xini+x5;yini=yini+y5;

for(k3=-3.141592+pr1; k3<= 3.141592+pr1; k3=k3+(pi2/n2)){;
                             
                                lato=18*n4;

x4 = (Math.cos(k3)*cos(k6b+z)*lato);
                                y4 = (Math.sin(k3)*lato);
                                xini=xini+x4;yini=yini+y4;

for(k2=-3.141592+pr1; k2<= 3.141592+pr1; k2=k2+(pi2/n2)){
                                   
                                    lato=9*n4;

x3 = (Math.cos(k2)*cos(k6b+z)*lato);
                                    y3 = (Math.sin(k2)*lato);
                                    xini=xini+x3;yini=yini+y3;

for(k1=-3.141592+pr1; k1<= 3.141592+pr1; k1=k1+(pi2/n3)){
                                      
                                        lato= 9*n4;

x1 =  (Math.cos(k1)*cos(k6b+z)*lato);
                                        y1 = (Math.sin(k1)*tanh(k6b)*lato);
   
                                        x2= (xini+x1);
                                        y2= (yini+y1);

bufimagegrafb.setColor(new Color(255,colz,255));

bufimagegrafb.drawLine ((int)(2+xini), (int)(1+yini),(int)(2+x2),(int)(1+y2)); 
                                        
                                        xini=x2;yini=y2;

}}}}}}                      
                                }
                             commenta = ( "Le Barre (b), (c),(d)  sono disabilitate; usa il mouse");    
                break;
            
                
               case 9:

n2= 3; n3=n3; n4=4; 
              xini= w/2;yini= h/2;
                      
             pr1= (n3*0.01);
            
            for(k6b=-3.141592; k6b<= 3.141592; k6b=k6b+(pi2/2)){
                
                    for(k5=-3.1415921-pr1; k5<= 3.141592-pr1; k5=k5+(pi2/(n2*2))){;
                       
                        lato=16*n4;

x6 = (Math.cos(k5+yz)*cos(k6b)*lato);
                        y6 =(Math.sin(k5+yz))*lato;
                        xini=xini+x6;yini=yini+y6;

for(k4=-3.141592+pr1; k4<= 3.141592+pr1; k4=k4+(pi2/(n2))){ ;
                            
                            lato=8*n4;

x5 = (Math.cos(k4+yz)*cos(k6b)*lato);
                            y5 = (Math.sin(k4+yz))*lato;
                            xini=xini+x5;yini=yini+y5;

for(k3=-3.141592+pr1; k3<= 3.141592+pr1; k3=k3+(pi2/(n2))){;
                             
                                lato=4*n4;

x4 = (Math.cos(k3+yz)*cos(k6b)*lato);
                                y4 = (Math.sin(k3+yz))*lato;
                                xini=xini+x4;yini=yini+y4;

for(k2=-3.141592+pr1; k2<= 3.141592+pr1; k2=k2+(pi2/(n2))){
                                 
                                    lato=2*n4;

x3 = (Math.cos(k2+yz)*cos(k6b)*lato);
                                    y3 = (Math.sin(k2+yz))*lato;
                                    xini=xini+x3;yini=yini+y3;

for(k1=-3.141592+pr1; k1<= 3.141592+pr1; k1=k1+(pi2/3)){
                                     
                                        lato= 2*n4;

x1 =  (Math.cos(k1+yz)*cos(k6b)*lato);
                                        y1 = (Math.sin(k1+yz))*lato;

x2= (xini+x1);
                                        y2= (yini+y1);

bufimagegrafb.setColor(new Color(255,colz,255));

bufimagegrafb.drawLine ((int)(xini), (int)(yini),(int)(x2),(int)(y2));

xini=x2;yini=y2;

}}}}} }                                                                  
                                
                       commenta = ( "Le Barre (b), (d)  sono disabilitate, prova con (c=262); usa il mouse");   
            break;

case 10:
              n2= 2; n3=n3; n4=4; 
              xini= w/2;yini= h/2;
           
             pr1= (n3*0.1);
            
            for(k6b=-3.141592; k6b<= 3.141592; k6b=k6b+(pi2/n2)){
                          
                    for(k5=-3.1415921-pr1; k5<= 3.141592-pr1; k5=k5+(pi2/(6))){;
                       
                        lato=16*n4;

x6 = (Math.cos(k5+yz)*cos(k6b)*lato);
                        y6 =(Math.sin(k5+yz))*lato;
                        xini=xini+x6;yini=yini+y6;

for(k4=-3.141592+pr1; k4<= 3.141592+pr1; k4=k4+(pi2/(6))){ ;
                            
                            lato=8*n4;

x5 = (Math.cos(k4+yz)*cos(k6b)*lato);
                            y5 = (Math.sin(k4+yz))*lato;
                            xini=xini+x5;yini=yini+y5;

for(k3=-3.141592+pr1; k3<= 3.141592+pr1; k3=k3+(pi2/(3))){;
                             
                                lato=4*n4;

x4 = (Math.cos(k3+yz)*cos(k6b)*lato);
                                y4 = (Math.sin(k3+yz))*lato;
                                xini=xini+x4;yini=yini+y4;

for(k2=-3.141592+pr1; k2<= 3.141592+pr1; k2=k2+(pi2/(3))){
                                 
                                    lato=2*n4;

x3 = (Math.cos(k2+yz)*cos(k6b)*lato);
                                    y3 = (Math.sin(k2+yz))*lato;
                                    xini=xini+x3;yini=yini+y3;

for(k1=-3.141592+pr1; k1<= 3.141592+pr1; k1=k1+(pi2/3)){
                                     
                                        lato= 2*n4;

x1 =  (Math.cos(k1+yz)*cos(k6b)*lato);
                                        y1 = (Math.sin(k1+yz))*lato;

x2= (xini+x1);
                                        y2= (yini+y1);

bufimagegrafb.setColor(new Color(255,colz,255));

bufimagegrafb.drawLine ((int)(xini), (int)(yini),(int)(x2),(int)(y2));

xini=x2;yini=y2;

}}}}}                                  
                                }
                              commenta = ( "Le Barre (b), (d)  sono disabilitate, prova con (c=262);usa il mouse");

break;

case 11:
             n2= 3; n3=2; n4=4; 
              xini= w/2;yini= h/2;                
             pr1= (n3*0.01);
            
            for(k6b=-3.141592; k6b<= 3.141592; k6b=k6b+(pi2/2)){
                
                    for(k5=-3.1415921-pr1; k5<= 3.141592-pr1; k5=k5+(pi2/(n2*2))){;
                       
                        lato=16*n4;

x6 = (Math.cos(k5+yz)*cos(k6b)*lato);
                        y6 =(Math.sin(k5+yz))*lato;
                        xini=xini+x6;yini=yini+y6;

for(k4=-3.141592+pr1; k4<= 3.141592+pr1; k4=k4+(pi2/(n2*2))){ ;
                            
                            lato=8*n4;

x5 = (Math.cos(k4+yz)*cos(k6b)*lato);
                            y5 = (Math.sin(k4+yz))*lato;
                            xini=xini+x5;yini=yini+y5;

for(k3=-3.141592+pr1; k3<= 3.141592+pr1; k3=k3+(pi2/(n2*2))){;
                             
                                lato=4*n4;

x4 = (Math.cos(k3+yz)*cos(k6b)*lato);
                                y4 = (Math.sin(k3+yz))*lato;
                                xini=xini+x4;yini=yini+y4;

for(k2=-3.141592+pr1; k2<= 3.141592+pr1; k2=k2+(pi2/(n2))){
                                 
                                    lato=2*n4;

x3 = (Math.cos(k2+yz)*cos(k6b)*lato);
                                    y3 = (Math.sin(k2+yz))*lato;
                                    xini=xini+x3;yini=yini+y3;

for(k1=-3.141592+pr1; k1<= 3.141592+pr1; k1=k1+(pi2/3)){
                                     
                                        lato= 2*n4;

x1 =  (Math.cos(k1+yz)*cos(k6b)*lato);
                                        y1 = (Math.sin(k1+yz))*lato;

x2= (xini+x1);
                                        y2= (yini+y1);

bufimagegrafb.setColor(new Color(255,colz,255));

bufimagegrafb.drawLine ((int)(xini), (int)(yini),(int)(x2),(int)(y2));

xini=x2;yini=y2;

}}}}}                        
                                }
                         commenta = ( "Le Barre (b), (c), (d)  sono disabilitate; usa il mouse");
            break;

case 12:
             n2= 1; n3=n3; n4=2; 
              xini= w/1.5;yini= h/1.5;
            pr1= yz;
            pr2=z;
            ee=0;

for(k6=-3.141592+pr2; k6<= 3.141592+pr2; k6=k6+(pi2/3)){

lato= 72/1.5;

x7 = (Math.cos(k6)*lato);
                y7 = (Math.sin(k6)*lato);
                xini=xini+x7;yini=yini+y7;

xini=xini+x7;yini=yini+y7;
                nx=n2*0.01;
                for(k5=-3.141592+nx; k5<= 3.141592+nx; k5=k5+(pi2/3)){

lato=72/1.5;

x6 = (Math.cos(k5)*lato);
                    y6 =(Math.sin(k5)*lato);
                    xini=xini+x6;yini=yini+y6;
                    ny= n3*0.01;
                    for(k4=-3.141592+ny; k4<= 3.141592+ny; k4=k4+(pi2/3)){

lato=36/1.5;

x5 = (Math.cos(k4)*lato);
                        y5 = (Math.sin(k4)*lato);
                        xini=xini+x5;yini=yini+y5;
                        nz=n4*0.01;
                        for(k3=-3.141592+nz; k3<= 3.141592+nz; k3=k3+(pi2/3)){

lato=18/1.5;
                            x4 = (Math.cos(k3)*lato);
                            y4 = (Math.sin(k3)*lato);
                            xini=xini+x4;yini=yini+y4;

for(k2=-3.141592; k2<= 3.141592; k2=k2+(pi2/3)){

lato=288/1.5;

x3 = (Math.cos(k2)*lato);
                                y3 = (Math.sin(k2)*lato);
                                xini=xini+x3;yini=yini+y3;
                                cox=0;

for(k1=-3.141592-PI/6; k1<= 3.141592-PI/6; k1=k1+(pi2/3)){
                                  
                                    lato= 10/1.5;

x1 =  (Math.cos(k1)*lato);
                                    y1 = (Math.sin(k1)*lato);
                                    x2= (xini+x1);
                                    y2= (yini+y1);

vertx2b[cox]= (int)(x2);
                                    verty2b[cox]= (int) (y2);

cox=cox+1;
                                    ee=(ee+10)%255;
                                }
                                {         
                                    ee=ee %255;
                                    bb= vertx2b[0];  cc= vertx2b[1]; dd= vertx2b[2]; 
                                    b1= verty2b[0];  c1= verty2b[1]; d1= verty2b[2];

vertx1b[0] = bb;
                                    vertx1b[1] = cc;
                                    vertx1b[2] =dd;

verty1b[0] = b1;
                                    verty1b[1] = c1;
                                    verty1b[2] =d1;
                                    
                                    bufimagegrafb.setColor(new Color(255-ee,colz,ee));
                                   
                                    bufimagegrafb.fillPolygon(vertx1b,verty1b,3);

}
                            }}}}} 
                           commenta = ( "Le Barre (b), (d)  sono disabilitate,  prova con (c=1; usa il mouse");
            break;

case 13:
           n2= n2; n3=n3%211; n4=3; 
              xini= w/2;yini= h/2;
                 pr1= (n3*0.02);
            
            for(k6b=-3.141592+pr1; k6b<= PI; k6b=k6b+(pi2/n2)){
                
                    
                    for(k5=-3.1415921+pr1; k5<= 3.141592+pr1; k5=k5+(pi2/3)){;
                       
                        lato=72*n4*0.5;

x6 = (Math.cos(k5)*cos(k6b+z)*lato);
                        y6 =(Math.sin(k5)*lato);
                        xini=xini+x6;yini=yini+y6;

for(k4=-3.141592+pr1; k4<= 3.141592+pr1; k4=k4+(pi2/3)){ ;
                            
                            lato=36*n4*0.5;

x5 = (Math.cos(k4)*cos(k6b+z)*lato);
                            y5 = (Math.sin(k4)*lato);
                            xini=xini+x5;yini=yini+y5;

for(k3=-3.141592+pr1; k3<= 3.141592+pr1; k3=k3+(pi2/3)){;
                                
                                lato=18*n4*0.5;

x4 = (Math.cos(k3)*cos(k6b+z)*lato);
                                y4 = (Math.sin(k3)*lato);
                                xini=xini+x4;yini=yini+y4;

for(k2=-3.141592+pr1; k2<= 3.141592+pr1; k2=k2+(pi2/3)){
                                    
                                    lato=9*n4*0.5;

x3 = (Math.cos(k2)*cos(k6b+z)*lato);
                                    y3 = (Math.sin(k2)*lato);
                                    xini=xini+x3;yini=yini+y3;

for(k1=-3.141592+pr1; k1<= 3.141592+pr1; k1=k1+(pi2/3)){
                                       
                                        lato= 9*n4*0.5;

x1 =  (Math.cos(k1)*cos(k6b+z)*lato);
                                        y1 = (Math.sin(k1)*lato);

x2= (xini+x1);
                                        y2= (yini+y1);

bufimagegrafb.setColor(new Color(255,colz,255));

bufimagegrafb.drawLine ((int)(xini), (int)(yini),(int)(x2),(int)(y2)); 
                                        
                                        
                                        xini=x2;yini=y2;

}}}}}  }                         
                               commenta = ( "La Barra  (d)  è disabilitate, , prova con (b=3), (c=420); usa il mouse");
                      break;
                
                      
                      case 14: 
                 pieno = h/20;     
              xini= w-150 ;yini= h-150;
             pr2= yz;
             n2=n2%2;
              if(n4 >5)n4= 5;
             if (n2 < 1) n3 = 3;
            if (n2 == 1) n3 = 6; 
            for(k6=-3.1415921; k6<= 3.141592; k6=k6+(pi2/n3)){
               lato= pieno*7;
               
                  if (n4 < 5)lato=1;
                x7 = (Math.cos(k6)*lato);
                y7 = (Math.sin(k6)*lato);
                
                xini=xini+x7;yini=yini+y7;
                   
                for(k5=-3.141592; k5<=3.141592; k5=k5+(pi2/n3)){
                   lato= pieno*3;
                   
                       if (n4 < 4)lato=1;
                    x6 = (Math.cos(k5)*lato);
                    y6 =(Math.sin(k5)*lato);
                    xini=xini+x6;yini=yini+y6;
                         
                    for(k4=-3.141592; k4<= 3.141592; k4=k4+(pi2/n3)){
                       lato= pieno*2;
                       
                          if (n4 < 3)lato=1;
                        x5 = (Math.cos(k4)*lato);
                        y5 = (Math.sin(k4)*lato);
                        xini=xini+x5;yini=yini+y5;
                             
                        for(k3=-3.141592-pr2; k3<=3.141592-pr2; k3=k3+(pi2/n3)){
                           
                                lato= pieno;
                                if (n4 < 2)lato=1;
                            x4 = (Math.cos(k3)*lato);
                            y4 = (Math.sin(k3)*lato);
                            xini=xini+x4;yini=yini+y4;

for(k1=-3.141592+pr2; k1<= 3.141592+pr2; k1=k1+(pi2/n3)){
                               
                                lato= pieno;
                                  
                                x1 =  (Math.cos(k1)*lato);
                                y1 = (Math.sin(k1)*lato);
                                x2= (xini+x1);
                                y2= (yini+y1);
                               
                                  bufimagegrafb.setColor(new Color(255,colz,255));
                                bufimagegrafb.drawLine ((int)(1+xini), (int)(1+yini),(int)(1+x2),(int)(1+y2)); 
                                
                                xini=x2;yini=y2;
                                
                                    
                            }}}}}
                     commenta = ( "Se la Barra (b)segna un num. pari hai un tringolo, altrimeni un esagono  la (d)  e attiva dall' 1 al 5");
            break;
            
            
               case 15:
               xini= w/1.5;yini= h/1.5;      
                      latoa= (n3);
            if (latoa >= 8)latoa = 8;
             if (latoa <= 2)latoa = 2;
              pr2= yz;
            for(k7=-3.141592; k7<= 3.141592; k7=k7+(pi2/3)){
                
                lato=288*n4*0.25;

x8 = (Math.cos(k7)*lato);
                y8 = (Math.sin(k7)*lato);
                xini=xini+x8;yini=yini+y8;

for(k6=-3.141592-pr2; k6<= 3.141592-pr2; k6=k6+(pi2/3)){
                    
                    lato=144*n4*0.25;

x7 = (Math.cos(k6)*lato);
                    y7 = (Math.sin(k6)*lato);
                    xini=xini+x7;yini=yini+y7;

for(k5=-3.141592-pr2; k5<= 3.141592-pr2; k5=k5+(pi2/3)){
                        
                        lato=72*n4*0.25;

x6 = (Math.cos(k5)*lato);
                        y6 =(Math.sin(k5)*lato);
                        xini=xini+x6;yini=yini+y6;

for(k4=-3.141592-pr2; k4<= 3.141592-pr2; k4=k4+(pi2/3)){;
                            
                            lato=36*n4*0.25;

x5 = (Math.cos(k4)*lato);
                            y5 = (Math.sin(k4)*lato);
                            xini=xini+x5;yini=yini+y5;

for(k3=-3.141592-pr2; k3<= 3.141592-pr2; k3=k3+(pi2/3)){
                               
                                lato=18*n4*0.25;

x4 = (Math.cos(k3)*lato);
                                y4 = (Math.sin(k3)*lato);
                                xini=xini+x4;yini=yini+y4;
                                
                                 
                                for(k2=-3.141592-pr2; k2<= 3.141592-pr2; k2=k2+(pi2/3)){
                                   
                                    lato=9*n4*0.25;

x3 = (Math.cos(k2)*lato);
                                    y3 = (Math.sin(k2)*lato);
                                    xini=xini+x3;yini=yini+y3;

for(k1=-3.141592-pr2; k1<= 3.141592-pr2; k1=k1+(pi2/latoa)){
                                       
                                        lato= 9*n4*0.25;

x1 =  (Math.cos(k1)*lato);
                                        y1 = (Math.sin(k1)*lato);
                                        x2= (xini+x1);
                                        y2= (yini+y1);

x3=(int)((lato*n2)%100);
                                  bufimagegrafb.setColor(new Color(255,colz,(255)));
                                        bufimagegrafb.drawLine ((int)(xini), (int)(yini),(int)(x2),(int)(y2));

xini=x2;yini=y2;

}}}}}}
                                        } 
                                  commenta = ( "La Barra (b)e disattivata. , prova con (c=3), (d=3)");

break;

case 16:         
            
            n2= n2; n3=n3; n4=n4; 
              xini= w/8;yini= h/8;
                      
             pr1= (n3*0.01);
            
            for(k6b=-3.141592; k6b<= 3.141592; k6b=k6b+(PI)){
                
                    for(k5=-3.1415921-pr1; k5<= 3.141592-pr1; k5=k5+(pi2/(n2))){;
                       
                        lato=16*n4;

x6 = (Math.cos(k5)*cos(k6b+z)*lato);
                        y6 =(Math.sin(k5))*lato;
                        xini=xini+x6;yini=yini+y6;

for(k4=-3.141592+pr1; k4<= 3.141592+pr1; k4=k4+(pi2/(n2))){ ;
                            
                            lato=8*n4;

x5 = (Math.cos(k4)*cos(k6b+z)*lato);
                            y5 = (Math.sin(k4))*lato;
                            xini=xini+x5;yini=yini+y5;

for(k3=-3.141592+pr1; k3<= 3.141592+pr1; k3=k3+(pi2/(n2))){;
                             
                                lato=4*n4;

x4 = (Math.cos(k3)*cos(k6b+z)*lato);
                                y4 = (Math.sin(k3))*lato;
                                xini=xini+x4;yini=yini+y4;

for(k2=-3.141592+pr1; k2<= 3.141592+pr1; k2=k2+(pi2/(n2))){
                                 
                                    lato=2*n4;

x3 = (Math.cos(k2)*cos(k6b+z)*lato);
                                    y3 = (Math.sin(k2))*lato;
                                    xini=xini+x3;yini=yini+y3;

for(k1=-3.141592+pr1; k1<= 3.141592+pr1; k1=k1+(pi2/3)){
                                     
                                        lato= 2*n4;

x1 =  (Math.cos(k1)*cos(k6b+z)*lato);
                                        y1 = (Math.sin(k1))*lato;

x2= (xini+x1);
                                        y2= (yini+y1);

bufimagegrafb.setColor(new Color(255,colz,255));

bufimagegrafb.drawLine ((int)(250+xini), (int)(190+yini),(int)(250+x2),(int)(190+y2));

xini=x2;yini=y2;

}}}}}                           
                                }
                          commenta = ( "Prova con  (a= 16), (b= 3), (c= 156), (d=6)" );

}
         bufimagegrafb.setColor(new Color(255,255,0));
          bufimagegrafb.setFont( new Font("Helvetica", Font.BOLD, 13));
          bufimagegrafb.drawString( "Ad ogni cambiamento di (a) clicca anche sulle altre tre barre>" , 10, h-50);
          bufimagegrafb.drawString (" "+commenta, 1,h-35 );

g2.drawImage(bufimage,0,0, this);

}

public void mouseClicked(MouseEvent et) {  
        Object source = et.getSource();

int aaaa=  et.getButton();

if(aaaa == MouseEvent.BUTTON3){

int startx = et.getX();
            int starty = et.getY();

if (startx >= 425) {

cox=cox+1;}
            if (cox >= 71)cox=71;

if (startx < 280) {

cox= cox-1;
                if (cox <= 1)cox=1;
            }
            repaint();

}

public void mousePressed(MouseEvent e) {

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

}

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+0.01*(mov1-mov2));mov2=mov1;
        yz= (yz -0.01* (mov4-mov3));mov3=mov4;

repaint();
        e.consume();
    }
}

img. 1

img. 2

img. 5

Queste immagini le potete ottenere con l'applet, Sono esempi per chi non riesce a visualizzare usare gli applet.

Applet che disegna triangoli di Siepinski

Listato dell'applet.