/**
 * cicloide sferica
 * 
 * @author (sergio savoldelli) 
 * @version ( version number 3)
 */

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

import javax.swing.event.*;
import javax.swing.border.*;
import java.awt.image.*;
import java.awt.geom.*;
import static java.lang.Math.*;

public class sfera_pois4f extends JApplet
implements  MouseListener,MouseMotionListener  {

    public double puntox,  puntoy, a,ci = 1,can= 0.4 ;
    public double pi2=PI*2;
    public double pi=3.14159265;
    public double xz = 0.0;

    public  int mov1,mov2,mov3,mov4,qq;
    public double hh ,k0,k02,r0,r02,yz,w1,incpasso,ipasso,incpassob,ipassob,x0,y0,z0,z02,x02,y02,lbx,lby,ll,qq2,
    xe2,ye2,aa2,ab5,ab6,ab7,zi,hh2,rp,aab,rg;

    public void init() {

        FlowLayout flow = new FlowLayout();
        addMouseListener(this);
        addMouseMotionListener(this);

        rp=50*can;rg=100;

        setSize(250, 250); 

        a=24;   
        setBackground (new Color(0,0,0));

    }  

    public void paint(Graphics g) {

        Graphics2D g2 = (Graphics2D)g;

        BufferedImage bufimage;
        BufferedImage bi,co;
        Graphics2D bufimagegraf ;
        Graphics2D big,cog,cogb ;

        BufferedImage buffImg = new BufferedImage(250, 250, BufferedImage.TYPE_INT_ARGB);
        Graphics2D gbi = buffImg.createGraphics();

        bufimage = new BufferedImage(250, 250, BufferedImage.TYPE_INT_ARGB);
        bufimagegraf= bufimage.createGraphics();
        bufimagegraf.setRenderingHint(RenderingHints.KEY_ANTIALIASING, RenderingHints.VALUE_ANTIALIAS_ON);
        bufimagegraf.setColor(new Color(255,0,0));
        bufimagegraf.setStroke(new BasicStroke(2.5f));

        bi = new BufferedImage(250, 250, BufferedImage.TYPE_INT_ARGB);
        big = bi.createGraphics();
        big.setRenderingHint(RenderingHints.KEY_ANTIALIASING, RenderingHints.VALUE_ANTIALIAS_ON);
        big.setColor(new Color(0,255,0));
        big.setStroke(new BasicStroke(1.3f));

        co = new BufferedImage(250,250,BufferedImage.TYPE_INT_ARGB);
        cog = co.createGraphics();
        cog.setRenderingHint(RenderingHints.KEY_ANTIALIASING, RenderingHints.VALUE_ANTIALIAS_ON);
        cog.setColor(new Color(255,0,255));
        cog.setStroke(new BasicStroke(1.05f));

        g2. setColor(new Color(0,0,0));
        g2.fillRect (0, 30, 250, 230);

        puntox=150;puntoy=150;

        for(hh2=0;hh2<=PI;hh2=(hh2+PI/(a/2))){  

            for(aab=(-PI);aab<=(PI);aab=aab+PI/(a*2)){  

                xe2= aab;
                ye2= hh2;

                k02=  (Math.cos(xe2)*Math.cos(ye2)*(rg));  
                y02= (Math.cos(xe2)*Math.sin(ye2)*1);
                z02= (Math.sin(xe2)*(rg));

                x02=(k02+130);
                r02= (y02)+135+((z02));

                cog.draw( new Ellipse2D.Double((int)(x02),(int)(r02),1,1));//le sfere

            }

        }
        g2.drawImage(co,0,0, this);
        zi=0;
        qq=0;ll=0;
        
        for(hh=-PI;hh<=PI;hh=(hh+PI/(a*5))){ 
            ll= PI+hh;
            qq=(int) (cos(ll)*100)+100;
            qq2=(int) (sin(ll)* 25)+125;
            zi=zi+PI/120;

          

            ab6= (cos(zi+PI/2))*(rp);//regola il diametro della ruota piccola

            incpasso= 130+(cos(zi)*(rg-(rp)));//*184 era
            incpassob= 130+(cos(zi)*(rg-(rp)))+ab6;//centro della ruota piccola

            ipasso= (130-rp+sin(zi)*rp);
            ipassob=(130-rp+sin(zi)*rp)+(rp);//ques

            w1= ceil(rg/rp);

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

            try{
                Thread.sleep(15);

            }
            catch(InterruptedException ev){

            }
           
            for(aa2=(0+zi*w1);aa2<=(pi2+zi*w1);aa2=aa2+pi/5){
                ab5= cos(aa2)*(ab6); // punti della circonferenza piccola 
                ab7= sin(aa2)*(rp);
                lbx=ab5+incpasso+ab6;// che vengono aggiunti alle coordinate della circonferenza grande quando queste si spostano sullo schermo
                lby=ab7+ipasso+(rp);

                bufimagegraf.draw( new Line2D.Double((int)(130),(int)(130),(int)lbx,(int)lby)); //quelle rosse
                bufimagegraf.draw( new Line2D.Double((int)(incpassob),(int)(ipassob),(int)lbx,(int)lby));// linee che partendo dal centro del cerchio piccolo

                incpassob=lbx; ipassob= lby;                           // formano il cerchio piccolo stesso

            }

            g2.drawImage(bufimage,null,0,0);
            big.fillOval((int)(ab5+incpasso+ab6),(int)(ab7+ipasso+(rp)),4,4);// pallino della curva

           

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

            g2.drawImage(bi,0,0, this);
            bufimagegraf.clearRect(18,125-(int)(rp*2.1),252-(int)(rp*1.5),(int)(rp*4.85));   
            

        }

       

    }  

    public void mouseClicked(MouseEvent evt) {

        Object source = evt.getSource(); //;  

        int aaaa=  evt.getButton();

        if  ( aaaa == 1){   
            can= (can+0.2)%0.61;
            rp= 50*can;
        }   repaint(); 

    }  

    public void mousePressed(MouseEvent e) {
        Object source = e.getSource();  

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

    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) {

    }

    public void destroy() {
        removeMouseListener(this);  removeMouseMotionListener(this);
    }   

}