Java：從數組中繪製圖形

Question

我正在爲我的第一個學校項目的java遊戲工作，並且在基於數組中的信息繪製圖形時遇到了一些問題。

我基本上試圖做的是創建一個2D數組（矩陣），它將存儲有關玩家可以移動的世界的所有信息。所以數組中的一些元素將包含牆，其他開放空間供玩家在移動，等等...

我有我的工作，從這個示例代碼：

/** 
* 
* @author Rasztemberg 
*/ 
package simpleGame; 

import java.awt.Color; 
import java.awt.Graphics; 
import java.awt.event.KeyEvent; 
import java.awt.event.KeyListener; 
import javax.swing.JPanel; 


/** 
* GameBoard is a part of JPanel. 
* It has a Graphical Object {@link Graphics} 
* that can be used to render shapes etc. Pass it's reference to any object you 
* want to display in the gameBoard panel. 
*/ 


public class GameBoard extends JPanel implements KeyListener{ 



Player player; 
Player enemy; 

public GameBoard(){ 

    // SETUP PLAYER ON THE BOARD; 
    int xPos = 0; 
    int yPos = 0; 
    int width = 20; 
    int height = 20; 
    Color playerC = Color.BLUE; 

    player = new Player(xPos, yPos, width, height, playerC); 

    // SETUP ENEMY ON THE BOARD; 
    enemy = new Player(100, 100, width, height, Color.RED); 

    addKeyListener(this); 
} 


/* 
* 
* JPanel function to display all gameBoard object graphics. 
*/ 

@Override 
public void paint(Graphics g){ 
    super.paint(g); // Call it's parent for proper rendering. 

    player.display(g); 
    enemy.display(g); 
} 


@Override 
public void keyTyped(KeyEvent e) {} 

@Override 
public void keyPressed(KeyEvent e) { 

    int keyCode = e.getKeyCode(); 
    if (keyCode == KeyEvent.VK_LEFT) { 
     player.moveLeft(); 
    } 

    if (keyCode == KeyEvent.VK_RIGHT) { 
     player.moveRight(); 
    } 

    if (keyCode == KeyEvent.VK_DOWN) { 
     player.moveDown(); 
    } 

    if (keyCode == KeyEvent.VK_UP) { 
     player.moveUp(); 
    } 
} 

@Override 
public void keyReleased(KeyEvent e) {} 


/** 
* Set's focus on the panel so key events are catch. 
*/ 

public boolean isFocusTraversable() { 
    return true; 
} 

}

而且，

/** 
* @author Rasztemberg 
*/ 
package simpleGame; 

import java.awt.Color; 
import java.awt.Graphics; 
import java.awt.Graphics2D; 
import java.awt.event.KeyEvent; 
import java.awt.event.KeyListener; 
import java.awt.event.MouseAdapter; 
import javax.swing.JPanel; 


/** 
* This is main player Class. 
* 
*/ 


public class World { 

// Snake parameters 

private int x; 
private int y; 
private int width; 
private int height; 
private Color color; 

/** 
* Class constructor. Called when instantiated. 
* Assigns x and y coordinates to position the player. 
* Sets width, height and color to the rendered object. 
* 
*/ 


public World(int x, int y, int w, int h, Color c){ 

    this.x = x; 
    this.y = y; 
    this.width = w; 
    this.height = h; 
    this.color = c; 
} 

/** 
* Accepts Graphics object to render 
* player 1 shape 
*/ 

public void display(Graphics g) { 

    // This is player rendered graphics. 
    Graphics2D walls = (Graphics2D) g; // Graphical library to render shapes. 
    walls.setColor(color); 
    walls.drawRect(x, y, width, height); 
    walls.fillRect(x, y, width, height); 
} 
} 

現在，我做了這個for循環填充測試陣列：

int[][] wallArray = new int[800][600]; 

     for (int x = 0; x < wallArray.length; x++) { 
      for (int y = 0; y < wallArray.length; y++) { 
       wallArray[x][y] = 1; 
      } 
     } 

     wallArray[100][100] = 0; 
     greatWall = new World(wallArray); 

你知道我該如何繪製這個數組？我很抱歉的代碼長度...

Answer 1

根據您的遊戲鍵盤的油漆陣列上只是油漆的東西：

@Override 
public void paint(Graphics g){ 
    super.paint(g); // Call it's parent for proper rendering. 
    for (int i = 0; i<wallArray.length; i++) 
     for (int j = 0; j<wallArray[0].length; j++){ 
      //do something for every field in the array 
      //i.e. g.setColor(Color.getColor(wallArray[i][j], 50, 50)); 
      //g.drawLine(i,j,i,j); 
    } 
    player.display(g); 
    enemy.display(g); 
} 

但是，你應該通過一些教程先下去繪畫在Java中： http://www.oracle.com/technetwork/java/painting-140037.html

Answer 2

最好是有牆壁

List<Rectangle> walls = new ArrayList<>(); 

這是更優化，你可以簡單地做：

for (Rectangle rect: walls) { 
    g.fillRect(rect.x, rect.y, rect.width, rect.height); 
} 

牆壁檢測相似。