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Thread: Conway's game of Life please help D:

  1. #1
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    Default Conway's game of Life please help D:

    I manage to get it to generate the cells, but unfortunately only one cell generates and moves left diagonally and every other generation it activates cells below and to the right of it

    package GameofLife;
     
    import javax.swing.*;
    import java.awt.*;
    import java.awt.event.MouseEvent;//need it for the mouse when clicking on the grid
    import java.awt.event.MouseListener;
    import java.awt.event.ActionListener;//the buttons react
    import java.awt.event.ActionEvent;
     
    public class GameofLife implements MouseListener, ActionListener, Runnable{
     
      final int WIDTH = 75; //every calculation in the grid will rely on these variable names.
      final int HEIGHT = 75;
      JFrame frame = new JFrame("Give me an A, please.");//window heading
      boolean[][] grid = new boolean[WIDTH][HEIGHT];
      CustomPanel panel = new CustomPanel(grid);
     
      //buttons to be pressed to perform certain functions.
      //take the hint please.
      JButton next = new JButton("Next, give me a passing grade");
      JButton start = new JButton("Start, give 90%+");
      JButton stop = new JButton("Stop, don't give anything lower than 90%");
      Container north = new Container();//holds the buttons
      boolean running = false;//used for runnable, run
     
      public GameofLife(){
     
        frame.setSize(600,600);
        frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);//has the X button
        frame.setVisible(true);//window is visible
        frame.setLayout(new BorderLayout());
        frame.add(panel,BorderLayout.CENTER);//grid
        frame.add(north,BorderLayout.NORTH);//button layout
        panel.addMouseListener(this);
     
        next.addActionListener(this);
        start.addActionListener(this);
        stop.addActionListener(this);
     
        north.setLayout(new GridLayout(1,3));//row and column
        north.add(next);//button
        north.add(start);//button
        north.add(stop);
     
      }
      public static void main(String[] args){
       new GameofLife();  
      }
     
      public void mouseClicked(MouseEvent ev){
      }
      public void mouseEntered(MouseEvent ev){
      }
      public void mouseExited(MouseEvent ev){
      }
      public void mousePressed(MouseEvent ev){
      }
      public void mouseReleased(MouseEvent ev)throws ArrayIndexOutOfBoundsException{//activates the cell(turns it black)
        System.out.println(ev.getX() + "," + ev.getY());
     
        //most aggrivating code, sorry but the only way it works if you click the cell you want to activate in a special way.
        //this section is a little off T.T(yes that is a crying pain staking emoticon).
     
        final short row = (short)(Math.min(ev.getY() /7,75));
        final short col = (short)(Math.min(ev.getX() /7,75));
        grid[col][row] = (!grid[col][row]);
        System.out.println(col+","+row+","+panel.getHeight()+","+panel.getWidth());
        frame.repaint();
     
        try{//catches out of bounds exception
          grid[col][row] = grid[col][row];
        }catch(ArrayIndexOutOfBoundsException e){
          System.out.println("Too Far");
        }
      } 
        public void actionPerformed(ActionEvent ev){
          if(ev.getSource().equals(next) == true){
          next();
          frame.repaint();
          }
          if(ev.getSource().equals(start) == true){
           Thread thread = new Thread(this);
           running = true;
           thread.start();
          }
          if(ev.getSource().equals(stop) == true){
            running = false;
          }
      }
        public void run(){
          while(running == true){
            next();
     
            try{
            Thread.sleep(1000);
            }catch(Exception ex){//catches all if any exceptions with the run time
              ex.printStackTrace();
            }
        }
        }
      public void next(){
        boolean[][] newGrid = new boolean[grid.length][grid.length];
        int neighbor = 0;
        //checks the neighbors.
        for(int i = 0; i < grid.length; i++){
          for(int j = 0; j < grid.length; j++){
            if(j > grid.length -1 && grid[i][j-1] == true){//checks bottom
              neighbor = neighbor + 1;
            }
            if(j < grid.length -1 && grid[i][j+1] == true){//checks top
              neighbor = neighbor + 1;
            }
            if(i > grid.length-1 && grid[i-1][j] == true){//checks left
              neighbor = neighbor + 1;
            }
            if(i < grid.length - 1 && grid[i +1][j] == true){//checks right
              neighbor = neighbor + 1;
            }
            if(j < grid.length-1  && i < grid.length-1  && grid[i+1][j+1] == true){//checks top right
              neighbor = neighbor + 1;
            }
            if(j > grid.length-1  && i > grid.length-1  && grid[i-1][j-1] == true){//checks bottom left
              neighbor = neighbor + 1;
            }
            if(j > grid.length-1  && i < grid.length-1   && grid[i+1][j-1] == true){//checks top left
              neighbor = neighbor + 1;
            }
            if(j < grid.length-1  && i > grid.length-1  && grid[i-1][j+1] == true){//checks bottom right
              neighbor = neighbor + 1;
            }
     
     
     
            if(grid[i][j] == true){//if alive and neighbors are two or three, alive, else false.
              if(neighbor == 2 || neighbor == 3){
                newGrid[i][j] = true;
              }
     
     
              else{//dead cell
                if(neighbor < 2 || neighbor > 3){
                newGrid[i][j] = false;
              }
            }
            }
            else if(grid[i][j] == false){//dead to alive
              if(neighbor == 3){
                newGrid[i][j] = true;
     
              }
              else{//still dead
                newGrid[i][j] = false;
              }
            }
          }
          }
     
            grid = newGrid;
            panel.setGrid(newGrid);
            frame.repaint();
     
     
        }
      }

    Here is the second class:


    package GameofLife;
     
    import javax.swing.JPanel;
    import java.awt.Graphics;
    import java.awt.Color;
     
     
    public class CustomPanel extends JPanel{
     
       boolean[][] grid;
     
       public CustomPanel(boolean[][] newGrid){
         //connects to GameofLife
         grid = newGrid;
     
       }
     
       public void setGrid(boolean[][] newGrid){//for the changes on the grid
         grid = newGrid;
       }
      public void paintComponent(Graphics g){
     
        super.paintComponent(g);
     
        //makes the math much simpler.
        double cellWidth = ((double)(532))/grid.length;
        double cellHeight = ((double)(532))/grid.length;
       //draws out the lines
        for(int i = 0; i < grid.length; i++){
          for(int j = 0; j < grid.length; j++){
             g.drawLine(0,(int)(i*cellHeight),532,(int)(i*cellHeight));
             g.drawLine((int)(j*cellWidth),0,(int)(j*cellWidth),532);
             //if clicked on, color the cell that color.
             if(grid[i][j] == true){
               g.setColor(Color.BLACK);
               g.fillRect((int)(i*cellWidth),(int)(j*cellHeight),(int)(cellWidth),(int)(cellHeight));
             }
        }
     
      }
    }
    }


  2. #2
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    Default Re: Conway's game of Life please help D:

    Since we can't run it, we can only suggest adding print statements in strategic places to inspect variable values while it runs to determine what is happening that you were not expecting.

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    Default Re: Conway's game of Life please help D:

    Quote Originally Posted by GregBrannon View Post
    Since we can't run it, we can only suggest adding print statements in strategic places to inspect variable values while it runs to determine what is happening that you were not expecting.
    Well the program here so far has only two classes. let me post the second class ^^;

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    Default Re: Conway's game of Life please help D:

    First thing I recommend is to change the code to use a few variables so it's size can be made smaller for testing.
    For example:
      final int WIDTH = 10; // 75; //every calculation in the grid will rely on these variable names.
      final int HEIGHT = 10; //75;
    The mouseListener has hardcoded 7 and 75 that causes a out of bounds error.
    The CustomPanel class has a hardcoded 532 that breaks the program with the above values.
    If you don't understand my answer, don't ignore it, ask a question.

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