import javax.microedition.lcdui.*;
import javax.microedition.lcdui.game.*;



public class Triangle extends GameCanvas implements Runnable{

double xp1=getWidth()-2;
double yp1=getWidth()-2;
double xp2=2;
double yp2=getWidth()-2;
double sin60=Math.sin (3.14/3.);
int nivel_de_recursividad=5;//getWidth()>getHeight()?getWidth()/30: getHeight()/30;
boolean run;
Thread t=new Thread(this);

 public Triangle() {
 super(true);
 setFullScreenMode(true);
 }
 public void start(){
 run=true;
 t.start();
 }
 public void run(){
 Graphics g=getGraphics();
  while (run) {
  paintHolst(g);
  try {t.sleep(10);} catch(Exception exc){}
  }
 }
 public void paintHolst(Graphics g){
 g.setColor(255,255,255);
 g.fillRect(0,0,getWidth(),getHeight());
 g.setColor(0);
 paintRecursivo(g,nivel_de_recursividad,xp1,yp1,xp2,yp2);
 flushGraphics();
 }
 private void paintRecursivo(Graphics g, int i, double xp12, double yp12, double xp22, double yp22 ) {
 double dx=(xp22-xp12) /2;
 double dy=(yp22- yp12)/2;
 double xp32=xp12+dx-2*dy*sin60;
 double yp32=yp12+dy+2*dx*sin60;
 double dx1=(xp22+xp12)/2;
 double dy1=(yp22+yp12)/2;
 double dx2=(xp32+xp22)/2;
 double dy2=(yp32+yp22)/2;
 double dx3=(xp12+xp32)/2;
 double dy3= (yp12+yp32)/2;
  if (i<=0) {
  g.fillTriangle((int)xp12,(int)yp12,(int)xp22,(int)yp22,(int)xp32,(int)yp32);
  g.drawLine((int)xp12,(int)yp12,(int)xp22,(int)yp22);
  g.drawLine((int)xp22,(int)yp22,(int)xp32,(int)yp32);
  g.drawLine((int)xp32,(int)yp32,(int)xp12,(int)yp12);
  } else {
  paintRecursivo(g,i-1,xp12,yp12,dx1,dy1);
  paintRecursivo(g,i-1,dx1,dy1,xp22,yp22);
  paintRecursivo(g,i-1,dx3,dy3,dx2,dy2);
  }
 }
}