我如何绘制元胞自动机

Question

我在 java 做元胞自动机练习，遇到了一个问题。

CA的逻辑部分工作正常，如果我想把它安排在控制台上就可以了，但我想把它画在面板上，当它是 1 画一个黑色方块时，当它为 0 时绘制一个白色方块

让我们进入问题

发生的事情是整个逻辑运行正常，但是绘制java时只绘制了最新一代的CA，我读到java paintComponent仅在java决定时起作用到而不是何时被调用。

My question is: how the best way to solve this problem and how to do it.

我想到了一些事情，但因为我不知道java所以我决定问你

我想过也许把所有的数组保存到一个数组中然后从中绘制（但我不知道我该怎么做）我想也许每个循环都有一种绘制的方法，但我没有找到了（我用了repaint()但是没用）

无论如何，如果有人能给我一个解决方案，我将不胜感激，我已经遇到这个问题好几天了，我还没有找到解决方案，下面是所有代码

import java.awt.BorderLayout;

import javax.swing.JFrame;    
import javax.swing.SwingUtilities;

@SuppressWarnings("serial")
public class CA extends JFrame {

    Rules rules = new Rules();

    public CA() {
        super("Cellular Automaton");
        setLayout(new BorderLayout());
        add(new GUI_CA(), BorderLayout.CENTER);
        pack();
        setLocationRelativeTo(null);
        setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE); 
        setVisible(true);

    }

    public static void main(String[] args) {

        SwingUtilities.invokeLater(new Runnable() {

            public void run() {
                new CA();
            }   
        }); 
      }
    }
}

import java.awt.Color;
import java.awt.Dimension;
import java.awt.Graphics;
import java.awt.Graphics2D;
import java.awt.image.BufferedImage;
import java.util.Arrays;

import javax.swing.BorderFactory;
import javax.swing.JPanel;    

@SuppressWarnings("serial")
public class GUI_CA extends JPanel {

    int cellSize = 10;

    Rules rules = new Rules();

    private BufferedImage img;
    private Graphics2D g2d;

    public GUI_CA() {

        img =  new BufferedImage(cellSize, cellSize, BufferedImage.TYPE_INT_RGB);
        g2d = (Graphics2D) img.createGraphics();

        evolution();    
    }

    public void evolution() {
        rules.cells = new int[987/cellSize];
        rules.cells[rules.cells.length/2] = 1;
        System.out.println(Arrays.toString(rules.cells));
        for (int generationCount = 0; generationCount < 10; generationCount++) {
            rules.generate();
            System.out.println(Arrays.toString(rules.cells));
            repaint();
        }           
    }

    public void drawCA(Graphics g) {

        Graphics2D g2d = (Graphics2D) g;

        for (int i = 1; i < rules.cells.length -1; i++) {

            if (rules.cells[i] == 1) {
                g2d.setColor(Color.BLACK);
                g2d.fillRect(i * cellSize, rules.generation * 5, cellSize, cellSize);
                System.out.println(Arrays.toString(rules.cells));
            }else {
                g2d.setColor(Color.WHITE);
                g2d.fillRect(i * cellSize, rules.generation * 5, cellSize, cellSize);
            }
        }


    }

    public void drawBackground(Graphics g) {

        Graphics2D g2d = (Graphics2D) g;

        int width = 987;
        int height = 545;

        g2d.setPaint(Color.WHITE);
        g2d.fillRect(0, 0, width, height);
    }

    public void paintComponent(Graphics g) {
        super.paintComponent(g);
        drawBackground(g);
        drawCA(g);
        g.drawImage(img, 0, 0, null);

    }

    public Dimension getPreferredSize() {
        return new Dimension(987, 545);
    }

}

public class Rules {

    int[] cells;
    int[] ruleSet = new int[] {0, 1, 1, 1, 1, 0, 0, 0};
    //int cellSize = 10;
    int generation = 0;


    void generate() {

        int[] nextGeneration = new int[cells.length];

        for (int i = 1; i < cells.length - 1; i++) {

            int left = cells[i - 1];
            int me = cells[i];
            int right = cells [i + 1];

            nextGeneration[i] = rules(left, me, right);
        }
        cells = nextGeneration;
        generation++;

    }

    int rules(int left, int me, int right) {
        String s = "" + left + me + right;
        int index = Integer.parseInt(s, 2);
        //System.out.println(index);
        return ruleSet[index];      
    }
}

Answer 1

GUI 编程不同于控制台编程，因为您必须使用事件系统而不是仅仅使用 while 循环来重复生成输出的任务。我建议您首先添加一个按钮，用户单击该按钮可进入下一代自动机。当你开始工作时，你可以更进一步添加一个定时器，它会在一定时间后自动进入下一代。

我如何绘制元胞自动机

How i can draw a cellular automaton

java

swing

cellular-automata