屏幕蛇碰撞問題

我是一位自學的程序員，我編寫的屏幕蛇爲樂趣。我正在使用不使用整數來存儲蛇或蘋果的位置，我正在使用雙打。當蛇通過蘋果時，我遇到了一個問題。碰撞時，代碼不記錄它發生碰撞。我假設這是因爲他們的X和Y值可能是.1關閉。我一直在試圖解決這個問題2周，但一直未能。對不起，如果我的代碼有點混亂。我不知道你們需要從代碼中得到什麼，所以我發佈了所有的代碼。我也非常感謝幫助！謝謝！！屏幕蛇碰撞問題

主要類：

Random random = new Random(); 
Dimension screenSize = Toolkit.getDefaultToolkit().getScreenSize(); 
double ScreenW = screenSize.getWidth(); 
double ScreenH = screenSize.getHeight(); 

int ScreenX = (int)Math.round(ScreenW); 
int ScreenY = (int)Math.round(ScreenH); 

JFrame frame = new JFrame(); 

double x = 1, y = 1; 
int size = 5; 
int ticks; 

private int columnCount = 25; 
private int rowCount = 15; 

double a = (ScreenW/columnCount) - 1; 
double b = (ScreenH/rowCount) - 1; 

private Key key; 
private List<Rectangle2D> cells; 
private Point selectedCell; 


boolean up = false; 
boolean down = false; 
boolean right = true; 
boolean left = false; 
boolean running = true; 
private Thread thread; 

private BodyP p; 
private ArrayList<BodyP> snake; 

private Apple apple; 
private ArrayList<Apple> apples; 

double width = screenSize.width; 
double height = screenSize.height; 
double cellWidth = width/columnCount; 
double cellHeight = height/rowCount; 

double xOffset = (width - (columnCount * cellWidth))/2; 
double yOffset = (height - (rowCount * cellHeight))/2; 

public Max_SnakeGame() throws IOException { 

    System.out.println(screenSize); 
    System.out.println(a + "," + b); 
    System.out.println(ScreenH + b); 
    System.out.println(ScreenW + a); 

    frame.getContentPane().add(new Screen()); 
    frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE); 
    frame.setUndecorated(true); 
    frame.setBackground(new Color(0, 0, 0, 0)); 
    frame.setLocationRelativeTo(null); 
    frame.setMaximumSize(screenSize); 
    frame.setExtendedState(JFrame.MAXIMIZED_BOTH); 
    frame.setVisible(true); 
    Image img = Toolkit 
      .getDefaultToolkit() 
      .getImage(
        "C:/Users/Max/My Documents/High School/Sophomore year/Graphic Disign/People art/The Mods Who Tell Pointless Stories.jpg"); 
    frame.setIconImage(img); 

} 

public static void main(String[] args) { 
    SwingUtilities.invokeLater(new Runnable() { 
     public void run() { 
      try { 
       new Max_SnakeGame(); 
      } catch (IOException e) { 
       // TODO Auto-generated catch block 
       e.printStackTrace(); 
      } 
     } 
    }); 
} 

public class Screen extends JPanel implements Runnable { 

    private static final long serialVersionUID = 1L; 

    public Screen() { 
     key = new Key(); 
     addKeyListener(key); 
     setMaximumSize(screenSize); 
     setOpaque(false); 
     setBackground(new Color(0, 0, 0, 0)); 
     setFocusable(true); 
     snake = new ArrayList<BodyP>(); 
     apples = new ArrayList<>(); 
     start(); 
    } 

    public void start() { 
     running = true; 
     thread = new Thread(this); 
     thread.start(); 
    } 

    public void run() { 
     while (running) { 
      MoveUpdate(); 
      repaint(); 

     } 
    } 

    protected void paintComponent(Graphics g) { 
     super.paintComponent(g); 
     repaint(); 
     Graphics2D g2d = (Graphics2D) g.create(); 
     cells = new ArrayList<>(columnCount * rowCount); 

     if (cells.isEmpty()) { 
      for (int row = 0; row < rowCount; row++) { 
       for (int col = 0; col < columnCount; col++) { 
        Rectangle2D cell = new Rectangle2D.Double(xOffset 
          + (col * cellWidth), yOffset 
          + (row * cellHeight), cellWidth, cellHeight); 
        cells.add(cell); 
       } 
      } 
     } 

     g2d.setColor(Color.GRAY); 
     for (Rectangle2D cell : cells) { 
      g2d.draw(cell); 
     } 

     for (int i = 0; i < snake.size(); i++) { 
      snake.get(i).draw(g); 
     } 
     for (int i = 0; i < apples.size(); i++) { 
      apples.get(i).draw(g); 
     } 

    } 

} 

private class Key implements KeyListener { 
    public void keyPressed(KeyEvent e) { 
     int keyCode = e.getKeyCode(); 

     if (keyCode == KeyEvent.VK_RIGHT && !left) { 
      up = false; 
      down = false; 
      right = true; 
     } 

     if (keyCode == KeyEvent.VK_LEFT && !right) { 
      up = false; 
      down = false; 
      left = true; 
     } 

     if (keyCode == KeyEvent.VK_UP && !down) { 
      left = false; 
      right = false; 
      up = true; 
     } 

     if (keyCode == KeyEvent.VK_DOWN && !up) { 
      left = false; 
      right = false; 
      down = true; 
     } 
    } 

    @Override 
    public void keyTyped(KeyEvent e) { 
     // TODO Auto-generated method stub 

    } 

    @Override 
    public void keyReleased(KeyEvent e) { 
     // TODO Auto-generated method stub 

    } 
} 

public void MoveUpdate() { 
    if (snake.size() == 0) { 
     p = new BodyP(x, y, a, b); 
     snake.add(p); 
    } 

    if (apples.size() == 0){ 
     double x1 = random.nextInt(25); 
     double Ax = ((x1*a+x1+1)*10)/10; 
     double y1 = random.nextInt(15); 
     double Ay = ((y1*b+y1+1)*10)/10; 
     double Afx = Math.round(Ax); 
     double Afy = Math.round(Ay); 


     System.out.println("Ax:"+Afx); 
     System.out.println("Ay:"+Afy); 


     apple = new Apple(Ax, Ay, a, b); 
     apples.add(apple); 

     } 

    for(int i = 0; i < apples.size(); i++) { 
     if(Math.round(x)-1 == apples.get(i).getx() || Math.round(x) == apples.get(i).getx() && Math.round(y)== apples.get(i).gety() || Math.round(y)-1 == apples.get(i).gety()) { 
      size++; 
      apples.remove(i); 
      i--; 
     } 
    } 

    ticks++; 
    if (ticks > 2500000) { 
     if (up == true) { 
      if (y <= 2) { 
       y = ScreenH - b; 
       System.out.println("Y:" + y); 

      } else { 
       y -= b + 1; 
       System.out.println("Y:" + y); 
      } 
     } 

     // down loop 
     else if (down == true) { 
      if (y >= ScreenH - b) { 
       y = 1; 
       System.out.println("Y:" + y); 

      } 

      else { 
       y += b + 1; 
       System.out.println("Y:" + y); 
      } 
     } 

     // left loop 
     else if (left == true) { 
      if (x <= 1) { 
       x = ScreenW - a; 
       System.out.println("X:" + x); 
      } 

      else { 
       x -= a + 1; 
       System.out.println("X:" + x); 

      } 
     } 

     // right loop 
     else if (right == true) { 
      if (x >= ScreenW - a) { 
       x = 1; 
       System.out.println("X:" + x); 
      } 

      else { 
       x += a + 1; 
       System.out.println("X:" + x); 
      } 
     } 
     ticks = 0; 

     p = new BodyP(x, y, a, b); 
     snake.add(p); 
     // rect.setFrame(x, y, a, b); 
     if (snake.size() > size) { 
      snake.remove(0); 
     } 
    } 
} 

}

蛇類：

public class BodyP { 
Dimension screenSize = Toolkit.getDefaultToolkit().getScreenSize(); 
double ScreenW = screenSize.getWidth(); 
double ScreenH = screen`enter code here`Size.getHeight(); 

double x = 1, y = 1; 

private int columnCount = 25; 
private int rowCount = 15; 

double a = (ScreenW/columnCount) - 1; 
double b = (ScreenH/rowCount) - 1; 

public BodyP(double x, double y, double a, double b) { 
    this.x = x; 
    this.y = y; 
    this.a = a; 
    this.b = b; 
} 
public void MoveUpdate(){ 

} 
public void draw(Graphics g) { 
Graphics2D g2 = (Graphics2D) g; 
Rectangle2D rect = new Rectangle2D.Double(x, y, a, b); 
g.setColor(Color.BLACK); 
g2.fill(rect); 
} 

public double getx() { 
    return x; 
} 

public void setx(double x) { 
    this.x = x; 
} 

public double gety() { 
    return y; 
} 

public void sety(double y) { 
    this.y = y; 
} 

}

蘋果類：

public class Apple { 
Dimension screenSize = Toolkit.getDefaultToolkit().getScreenSize(); 
double ScreenW = screenSize.getWidth(); 
double ScreenH = screenSize.getHeight(); 

double x = 1, y = 1; 

private int columnCount = 25; 
private int rowCount = 15; 

double a = (ScreenW/columnCount) - 1; 
double b = (ScreenH/rowCount) - 1; 

public Apple(double x, double y, double a, double b) { 
    this.x = x; 
    this.y = y; 
    this.a = a; 
    this.b = b; 
} 
public void MoveUpdate(){ 

} 
public void draw(Graphics g) { 
Graphics2D g2 = (Graphics2D) g; 
Rectangle2D rect = new Rectangle2D.Double(x, y, a, b); 
g.setColor(Color.RED); 
g2.fill(rect); 
} 

public double getx() { 
    return x; 
} 

public void setx(double x) { 
    this.x = x; 
} 

public double gety() { 
    return y; 
} 

public void sety(double y) { 
    this.y = y; 
} 

}

來源

2014-05-16 m0t0

如果你認爲這是由於舍入誤差，使用歐氏距離，並與比較所需公差：

final double tolerance = 1.0; // or whatsoever 

double dx = snake.x - apple.x; 
double dy = snake.y - apple.y; 
if (dx*dx + dy*dy < tolearance * tolerance) ...

我建議實施像Point.distanceTo(Point)這樣的方法來使這個方便。

來源

2014-05-16 17:57:24 h22

我會嘗試，當我回家！我目前正在上學（歷史課... booorrring！）。如果這有效，我會通知你。 – m0t0

只需放入它，它工作！：D非常感謝！我從來沒有想到這一點，並將一定注意到這一功能，因爲當我開始添加碰撞檢測蛇擊中其身體。我非常感謝幫助！ – m0t0

屏幕蛇碰撞問題

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