在java中檢測colision（瓷磚地圖）

Question

在這裏，我有一個代碼，帶有在地圖上移動的圖片。

如何使這張圖片在與地圖塊互動時變色？我是一個初學者，所以我沒有任何想法。任何幫助或建議是非常受歡迎的。

代碼：

import java.awt.Color; 
import java.awt.Graphics; 
import java.awt.Graphics2D; 
import java.awt.Image; 
import java.awt.Toolkit; 
import java.awt.event.KeyEvent; 
import java.awt.event.KeyListener; 
import java.awt.image.BufferedImage; 
import java.io.BufferedReader; 
import java.io.FileNotFoundException; 
import java.io.FileReader; 
import java.io.IOException; 
import java.io.InputStreamReader; 

import javax.swing.Timer; 
import javax.imageio.ImageIO; 
import javax.swing.JFrame; 

import org.omg.CORBA.portable.InputStream; 

import java.io.Reader; 

public class NewTest extends JFrame implements KeyListener { 
/** 
* 
*/ 
private static final long serialVersionUID = 1L; 
private Image TestImage; 
private BufferedImage bf; 
private BufferedImage bufferedImage; 
private int cordX = 100; 
private int cordY = 100; 
public int mapy=25; 
public int mapx=mapy; 
public int size= 20; 
private boolean down, up, left, right; 
private Image wall = Toolkit.getDefaultToolkit().getImage("image/Koala.jpg"); 
private Image no = Toolkit.getDefaultToolkit().getImage("image/house.jpg"); 

public static int[][] 
     map =    {{0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0}, 
          {0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0}, 
          {0, 10, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 11}, 
          {0, 2, 1, 1, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 3}, 
          {0, 2, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 3}, 
          {0, 2, 0, 1, 0, 0, 1, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 3}, 
          {0, 2, 0, 1, 0, 0, 1, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 3}, 
          {0, 2, 0, 1, 0, 0, 1, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 3}, 
          {0, 2, 0, 1, 0, 0, 1, 0, 0, 0, 1, 0, 0, 0, 3, 0, 4, 0, 5, 0, 0, 0, 0, 0, 0, 3}, 
          {0, 2, 0, 1, 1, 0, 1, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 3}, 
          {0, 2, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 3}, 
          {0, 2, 0, 0, 0, 0, 0, 0, 0, 0, 2, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 3}, 
          {0, 2, 0, 1, 0, 0, 1, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 3}, 
          {0, 2, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 3}, 
          {0, 2, 0, 0, 0, 0, 0, 0, 0, 0, 3, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 3}, 
          {0, 2, 0, 1, 0, 0, 1, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 3}, 
          {0, 2, 0, 1, 0, 0, 1, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 3}, 
          {0, 2, 0, 0, 0, 0, 0, 0, 0, 0, 4, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 3}, 
          {0, 2, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 3}, 
          {0, 2, 0, 1, 0, 0, 1, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 3}, 
          {0, 2, 0, 0, 0, 0, 0, 0, 0, 0, 5, 0, 10, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 3}, 
          {0, 2, 0, 1, 0, 0, 1, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 3}, 
          {0, 2, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 3}, 
          {0, 2, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 3}, 
          {0, 2, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 3}, 
          {0, 12, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 13}}; 

public NewTest() throws IOException { 
    setTitle("Testing...."); 
    setSize(mapy*size+50,mapx*size+50); 
    imageLoader(); 
    setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE); 
    setVisible(true); 
} 

public void imageLoader() throws IOException { 
    TestImage = Toolkit.getDefaultToolkit().getImage("image/Koala.jpg"); 

    addKeyListener(this); 
} 

public void update(Graphics g){ 
     paint(g); 
} 


public void paint(Graphics g){ 

    bf = new BufferedImage(this.getWidth(),this.getHeight(), BufferedImage.TYPE_INT_RGB); 

try{ 
animation(bf.getGraphics()); 
g.drawImage(bf,0,0,null); 
}catch(Exception ex){ 

} 


} 

public void animation(Graphics g) { 
    super.paint(g); 
    Graphics2D g2d = (Graphics2D)g; 
    for (int y = 0; y <= mapy; y++){ 
     for (int x = 0; x <= mapx; x++){ 

      int L = x * size; 
      int U = y * size; 
      int R = size; 
      int D = size; 
       /// g2d.rotate(Math.toRadians(-90)); 

      if (map[y][x] == 1){ 
       //no black wall 
       g2d.setColor(Color.green); 
       g2d.fillRect(L, U, R, D); 


      }else if (map[y][x] == 2){ 
       //on left 
       g2d.setColor(Color.green); 
       g2d.fillRect(L, U, R, D); 
       g2d.setColor(Color.black); 
       g2d.fillRect(L-size/2 +2, U, 8, size); 

      }else if (map[y][x] == 3){ 
       //on right 
       g2d.setColor(Color.green); 
       g2d.fillRect(L, U, R, D); 
       g2d.setColor(Color.black); 
       g2d.fillRect(L+size, U, 8, size); 

      }else if (map[y][x] == 4){ 
       //on top 
       g2d.setColor(Color.green); 
       g2d.fillRect(L, U, R, D); 
       g2d.setColor(Color.black); 
       g2d.fillRect(L, U-size/2 + 2, size, 8); 

      }else if (map[y][x] == 5){ 
       //on bottom 
       g2d.setColor(Color.green); 
       g2d.fillRect(L, U, R, D); 
       g2d.setColor(Color.black); 
       g2d.fillRect(L, U+size, size, 8); 
      }else if (map[y][x] == 10){ 
       //on bottom 
       g2d.setColor(Color.green); 
       g2d.fillRect(L, U, R, D); 
       g2d.setColor(Color.black); 
       g2d.fillRect(L, U-size/2 + 2, size, 8); 
       g2d.fillRect(L-size/2 +2, U, 8, size); 
      }else if (map[y][x] == 11){ 
       //on bottom 
       g2d.setColor(Color.green); 
       g2d.fillRect(L, U, R, D); 
       g2d.setColor(Color.black); 
       g2d.fillRect(L, U+size, size, 8); 
      }else if (map[y][x] == 12){ 
       //on bottom 
       g2d.setColor(Color.green); 
       g2d.fillRect(L, U, R, D); 
       g2d.setColor(Color.black); 
       g2d.fillRect(L, U+size, size, 8); 
      }else if (map[y][x] == 13){ 
       //on bottom 
       g2d.setColor(Color.green); 
       g2d.fillRect(L, U, R, D); 
       g2d.setColor(Color.black); 
       g2d.fillRect(L, U+size, size, 8); 
      } 

     } 

    } 
    g.drawImage(TestImage, cordX, cordY,20 , 20, this); 

    } 


public static void main(String[] args) { 
    try { 
     new NewTest(); 
    } catch (IOException e) { 

     e.printStackTrace(); 
    } 
} 

public void keyPressed(KeyEvent ke) { 
    switch (ke.getKeyCode()) { 
     case KeyEvent.VK_RIGHT: 
      right = true; 
      break; 
     case KeyEvent.VK_LEFT: 
      left = true; 
      break; 
     case KeyEvent.VK_DOWN: 
      down = true; 
      break; 
     case KeyEvent.VK_UP: 
      up = true; 
      break; 
    } 
    updateState(); 
} 

public void keyReleased(KeyEvent ke) { 
    switch (ke.getKeyCode()) { 
     case KeyEvent.VK_RIGHT: 
      right = false; 
      break; 
     case KeyEvent.VK_LEFT: 
      left = false; 
      break; 
     case KeyEvent.VK_DOWN: 
      down = false; 
      break; 
     case KeyEvent.VK_UP: 
      up = false; 
      break; 
    } 
    updateState(); 
} 

protected void updateState() { 
    if (right) { 
     cordX += 5; 
    } else if (left) { 
     cordX -= 5; 

    } 
    if (down) { 
     cordY += 5; 
    } else if (up) { 
     cordY -= 3; 
    } 
    if (down && up) { 
     cordY += 0; 
     cordX += 0; 
    } 
    if (right && left) { 
     cordX += 0; 
     cordY += 0; 
    } 

    System.out.printf("X:");System.out.println(cordX); 
    System.out.printf("Y:");System.out.println(cordY); 
    repaint(); 
} 

public void keyTyped(KeyEvent ke) { 
} 

} 

感謝您的幫助！

Answer 1

好的方法是分離視覺和現實模型。這意味着深入程序，你有你的「物理規則」和所有對象，並基於該模型，繪製它。

你可以用這樣的

public class ObjectInMyGame{ 
    private int posx; 
    private int posy; 
    private int width; 
    private int height; 
    private Image image; 
    private int movingX; 
    private int movingY; 
    //Note that it is good to use Point or something like that, instead of posx, posy. 
} 

創建類開始，然後這是好事，有某種「遊戲控制器」，這是運行你的整個世界。

public class GameController{ 
    List<ObjectInMyGame> objects; 

    public updateGame(){ 
    for (ObjectInMyGame object : objects){ 
     object.doSomething(); //sometimes it is good idea to let objects itself do something 
    } 
    } 
} 

因此，例如，當您移動對象時，您可以檢查他是否碰撞，然後決定如何處理。