Ne peut pas dessiner des pixels, le nombre Pi de manière Synesthetic

Question

Je veux imprimer chaque chiffre du nombre de pi comme un pixel de couleur, donc, je reçois une entrée, le nombre pi, puis l'analyse syntaxique dans une liste, chaque noeud contenant un chiffre (je sais, je vais utiliser un tableau plus loin), mais je ne me ce peint à l'écran ... aider quelqu'un peut me voir où je me trompe?

import java.awt.BorderLayout;
import java.awt.Graphics;
import java.awt.Image;
import java.awt.image.MemoryImageSource;
import java.io.BufferedReader;
import java.io.File;
import java.io.FileReader;
import java.util.ArrayList;
import java.util.List;

import javax.swing.JFrame;
import javax.swing.JPanel;

public class PiPainter extends JPanel
{
    private static final long   serialVersionUID    = 6416932054834995251L;

    private static int pixels[];
    private static List<Integer> pi = new ArrayList<Integer>();
    private final static int[] color = {
        0xFF000000, 0xFF787878, 0xFF008B00, 0xFF00008B, 0xFF008B8B,
        0xFF008B00, 0xFFCDCD00, 0xFFFF4500, 0xFF8B0000, 0xFFFF0000
        };

    public static void readFile(String name)
    {
        File file = new File(name);
        BufferedReader reader = null;
        char[] digits;

        try
        {
            reader = new BufferedReader(new FileReader(file));

            String text = null;

            while((text = reader.readLine()) != null)
            {
                digits = text.toCharArray();

                for(char el : digits)
                    if(el != ' ')
                    pi.add(Character.getNumericValue(el));
            }
        } catch (Exception e)
        {
            e.printStackTrace();
        }
    }

    public void paint(Graphics gg) 
    {
        // page containing pi number, http://gc3.net84.net/pi.htm
        // other source, http://newton.ex.ac.uk/research/qsystems/collabs/pi/pi6.txt
        readFile("c:\\pi.txt");
        int h = 300;
        int w = 300;
        int digit;
        int i = 0;  

        pixels = new int[w * h];

        for (int y = 0; y < h; y++) 
        {
          for (int x = 0; x < w; x++) 
          {
              pixels[i] = color[pi.get(i)];
              i++;
          }
        }

        Image art = createImage(new MemoryImageSource(w, h, pixels, 0, w));

        gg.drawImage(art, 0, 0, this);
    }

    public static void main(String[] args)
    {
        JFrame frame = new JFrame();
        frame.getContentPane().add(new PiPainter(), BorderLayout.CENTER);
        frame.setLocationRelativeTo(null);
        frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
        frame.setSize(400,400);
        frame.setVisible(true);
    }
}

Answer 1

Je ne suis pas familier avec MemoryImageSource. Voici la première 16 300 chiffres de π, répétées dans un BufferedImage et en utilisant votre table de couleurs.

import java.awt.Dimension;
import java.awt.Graphics;
import java.awt.image.BufferedImage;
import java.util.ArrayList;
import java.util.List;
import javax.swing.JFrame;
import javax.swing.JPanel;
import javax.swing.SwingUtilities;

public class PiRaster extends JPanel {

    private static final int W = 30;
    private static final int H = 30;
    private static List<Integer> pi = new ArrayList<Integer>();
    BufferedImage image;
    private int[] clut = {
        0x000000, 0x787878, 0x008B00, 0x00008B, 0x008B8B,
        0x008B00, 0xCDCD00, 0xFF4500, 0x8B0000, 0xFF0000
    };

    public PiRaster() {
        this.setPreferredSize(new Dimension(W * 16, H * 10));
        String s = ""
            + "31415926535897932384626433832795028841971693993751"
            + "05820974944592307816406286208998628034825342117067"
            + "98214808651328230664709384460955058223172535940812"
            + "84811174502841027019385211055596446229489549303819"
            + "64428810975665933446128475648233786783165271201909"
            + "14564856692346034861045432664821339360726024914127";
        for (int i = 0; i < s.length(); i++) {
            pi.add(s.charAt(i) - '0');
        }
    }

    @Override
    public void paintComponent(Graphics g) {
        if (image == null) {
            image = (BufferedImage) createImage(W, H);
            int i = 0;
            for (int row = 0; row < H; row++) {
                for (int col = 0; col < W; col++) {
                    image.setRGB(col, row, clut[pi.get(i)]);
                    if (++i == pi.size()) {
                        i = 0;
                    }
                }
            }
        }
        g.drawImage(image, 0, 0, getWidth(), getHeight(), null);
    }

    public static void main(String[] args) {
        SwingUtilities.invokeLater(new Runnable() {

            @Override
            public void run() {
                JFrame frame = new JFrame();
                frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
                frame.add(new PiRaster());
                frame.pack();
                frame.setVisible(true);
            }
        });
    }
}

Answer 2

@trashgod

Merci pour votre réponse, je l'ai changé un peu pour obtenir ce que je cherchais; )

Maintenant, vous pouvez changer facilement la largeur pour obtenir une meilleure vue de l'image et adapter le contenu et le nombre ne pas les répétitions, le rendant facile à motifs Percevoir (s'il pourrait y avoir). Oh, et j'ai ajouté environ 2 ~ 3 lignes à la fin, pour le clarifier.

package edu.pi;

import java.awt.Dimension;
import java.awt.Graphics;
import java.awt.image.BufferedImage;
import java.util.ArrayList;
import java.util.List;
import javax.swing.JFrame;
import javax.swing.JPanel;
import javax.swing.SwingUtilities;

public class PiRaster extends JPanel
{
    private static final long       serialVersionUID    = -1298205187260747210L;

    private static int              W;
    private static int              H;
    private static List<Integer>    pi                  = new ArrayList<Integer>();
    BufferedImage                   image;
    private int[]                   clut                = { 
            0x000000, 0x787878, 0x008B00, 0x00008B, 0x008B8B,
            0x008B00, 0xCDCD00, 0xFF4500, 0x8B0000, 0xFF0000
            };

    public PiRaster()
    {
        String s = "3."
                + "14159265358979323846264338327950288419716939937510"
                + "58209749445923078164062862089986280348253421170679"
                + "82148086513282306647093844609550582231725359408128"
                + "48111745028410270193852110555964462294895493038196"
                + "44288109756659334461284756482337867831652712019091"
                + "45648566923460348610454326648213393607260249141273"
                + "72458700660631558817488152092096282925409171536436"
                + "78925903600113305305488204665213841469519415116094"
                + "33057270365759591953092186117381932611793105118548"
                + "07446237996274956735188575272489122793818301194912"
                + "98336733624406566430860213949463952247371907021798"
                + "60943702770539217176293176752384674818467669405132"
                + "00056812714526356082778577134275778960917363717872"
                + "14684409012249534301465495853710507922796892589235"
                + "42019956112129021960864034418159813629774771309960"
                + "51870721134999999837297804995105973173281609631859"
                + "50244594553469083026425223082533446850352619311881"
                + "71010003137838752886587533208381420617177669147303"
                + "59825349042875546873115956286388235378759375195778"
                + "18577805321712268066130019278766111959092164201989";

        char temp;

        for (int i = 0; i < s.length(); i++)
        {
            temp = s.charAt(i);
            if (temp >= 48 && temp <= 57)
                pi.add(s.charAt(i) - '0');
        }

        W = 50;
        H = s.length() / W + 3;
        this.setPreferredSize(new Dimension(W * 10, H * 10));
    }

    @Override
    public void paintComponent(Graphics g)
    {
        if (image == null)
        {
            image = (BufferedImage) createImage(W, H);
            int i = 0;
            boolean end = false;

            for (int row = 0; row < H && !end; row++)
            {
                for (int col = 0; col < W && !end; col++)
                {
                    image.setRGB(col, row, clut[pi.get(i)]);
                    if (++i == pi.size())
                    {
                        i = 0;
                        end = true;
                    }
                }
            }
        }

        g.drawImage(image, 0, 0, getWidth(), getHeight(), null);
    }

    public static void main(String[] args)
    {
        SwingUtilities.invokeLater(new Runnable()
        {

            @Override
            public void run()
            {
                JFrame frame = new JFrame("Pi raster");
                frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
                frame.add(new PiRaster());
                frame.pack();
                frame.setLocationRelativeTo(null);
                frame.setVisible(true);
            }
        });
    }
}