c02bba42b99d001c1557a899b06c072e

用J2ME实现的

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package org.piratis.j2me.demos.tank;

import java.io.IOException;

import javax.microedition.lcdui.*;

import org.piratis.j2me.core.BBox2D;
import org.piratis.j2me.core.game.Canvas;
import org.piratis.j2me.core.game.Engine;
import org.piratis.j2me.core.game.TiledLayer;

public class MicroTankEngine
    extends Engine {
  private volatile boolean mTrucking;
  private MicroTankSprite mTank;
  private TiledLayer mBoard;
  
  
  public MicroTankEngine(Canvas canvas) throws IOException {
    super(canvas);
    
    mTank = createTank();
    mTank.moveTo(0, 24);
    mBoard = createBoard();

    this.layers.add(mTank);
    this.layers.add(mBoard);
  }
  
  private MicroTankSprite createTank() throws IOException {
    Image image = Image.createImage("/tank/tank.png");
    return new MicroTankSprite(image, 32, 32);
  }

  private TiledLayer createBoard() throws IOException {
    Image image = Image.createImage("/tank/board.png");
    TiledLayer tiledLayer = new TiledLayer(10, 12, image, 16, 16);
    
    int[] map = {
       1,  1,  1,  1,  1,  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,  1,  0,  0,  0,  0,  0,
       0,  0,  0,  0,  1,  0,  0,  0,  0,  0,
       0,  0,  0,  1,  1,  0,  0,  0,  0,  0,
       1,  1,  1,  1,  1,  0,  0,  0,  0,  0,
       0,  0,  0,  0,  0,  0,  0,  0,  0,  0,
       0,  0,  0,  0,  0,  0,  0,  1,  1,  0,
       0,  0,  0,  0,  0,  0,  1,  1,  0,  0,
       0,  0,  0,  0,  0,  1,  1,  0,  0,  0
    };
    
    for (int i = 0; i < map.length; i++) {
      int column = i % 10;
      int row = (i - column) / 10;
      tiledLayer.setCell(column, row, map[i]);
    }
    
    return tiledLayer;
  }
  
  public void start() {
    mTrucking = true;
    Thread t = new Thread(this);
    t.start();
  }
  
  protected void work() {
    if (mBoard.cellCollides(mTank))
      mTank.undo();
    // center screen (scrolling)
    BBox2D bbox = mTank.getBbox();
    int cx = bbox.getCenterX();
    int cy = bbox.getCenterY();
    int w = this.canvas.getWidth();
    int h = this.canvas.getHeight();
    cx = Math.max(0, cx - w/2);
    cy = Math.max(0, cy - h/2);
    this.layers.setWindow(cx, cy, w, h);
  }
  
  protected void input() {
    int keyStates = getKeyStates();
    if ((keyStates & Engine.IS_LEFT) != 0) mTank.turn(-1);
    else if ((keyStates & Engine.IS_RIGHT) != 0) mTank.turn(1);
    else if ((keyStates & Engine.IS_UP) != 0) mTank.forward(2);
    else if ((keyStates & Engine.IS_DOWN) != 0) mTank.forward(-2);
  }
}