import java.awt.*;
import java.awt.image.*;
import javax.imageio.*;
import java.io.*;

/*
  Autore     : Marco 'RootkitNeo'
  Descrizione: Classe che si occupa della creazione del frattale
  Dipendenza : http://pastebin.com/jfTDFE8W
*/


class Fractal {
  // Variabili
  // -----------------------------------------------------------------------------------------------------------
  private Image img;                                     // Frattale
  private double X0,X1, Y0, Y1, modulo, x, y;            // [X0,Y0][X0,Y1] punti luce; modulo: valore temporaneo abs(); x,y valori temporanei pixel immagine
  private int cicli,profondita, width, height;           // profondita: dettaglio immagine
  private Complex c1, c2;                                // Numeri complessi
  // -----------------------------------------------------------------------------------------------------------
  
  
  Fractal(int width, int height, double X0, double X1, double Y0, double Y1, int profondita) {
    this.width = width;
    this.height= height;
    this.X0 = X0;
    this.X1 = X1;
    this.Y0 = Y0;
    this.Y1 = Y1;
    this.profondita = profondita;
    
  }
  
  void generaFrattale() {
    int[] pixels = new int[width*height];
    int k = 0;
    img = null;
    
    for(int i=0; i<height; i++) {
      y = Y1 + (((double)i * (Y0-Y1)) / (double)height);
      
      for(int j = 0; j<width; j++) {
        x = X1 + (((double)j * (X0-X1)) / (double)width);
        
        c1 = new Complex(x,y);
        c2 = c1;
        
        
        for(cicli = 0; cicli < profondita; cicli++) {
          c1 = c1.somma(c1.prodotto(c1,c1),c2);
          modulo = c1.abs();
          
          if(modulo > 4.0) break;
        }
        
        if(modulo<=4.0) {
          pixels[k++] = (255 << 24) | 0;
        } else {
          int r, g, b;
          
          r =  (cicli>>2);
          g =  (cicli>>1);
          b =  10+(cicli<<2);
          
          r = (r>128) ? 128 : r;
          g = (g>128) ? 128 : g;
          b = (b>255) ? 255 : b;
          
          pixels[k++] = (255 << 24) | (r << 16) | (g << 8) | b;
          
        }
      }
    } 

    try {
      Toolkit tk = Toolkit.getDefaultToolkit();
      img = tk.createImage(new MemoryImageSource(width, height,pixels,0,width));
    } catch(Exception e) {
      e.printStackTrace();
    }
  }
  
  
  void salvaImmagine(String name) {
    if(img == null) return;
    BufferedImage b = new BufferedImage(width,height,BufferedImage.TYPE_INT_ARGB);
    Graphics g = b.getGraphics();

    try {
      g.drawImage(img.getScaledInstance(width,height,Image.SCALE_SMOOTH),0,0,null);
    
      ImageIO.write(b,"PNG",new File(name+".png"));
    } catch(Exception e) {e.printStackTrace();}
  }
  
  
  Image getImage() {
    return img;
  }
}