loadm3gdemo.java

Java ME手机应用开发大全一书的配套光盘上的源码

import javax.microedition.midlet.*;
import javax.microedition.lcdui.*;
import javax.microedition.lcdui.game.*;
import javax.microedition.m3g.*;

public class LoadM3GDemo extends MIDlet  implements CommandListener {
    Display display = null;
    private Command cmdExit = new Command("Exit", Command.STOP, 1);
    private M3GCanvas can = null;
    
    public LoadM3GDemo() {
        display = Display.getDisplay(this);
        can = new M3GCanvas(false);
        can.addCommand(cmdExit);
        can.setCommandListener(this);
    }
    
    public void startApp() {
        display.setCurrent(can);
    }
    
    public void pauseApp() {
    }
    
    public void destroyApp(boolean unconditional) {
    }
    
    /**
     * 命令按钮事件
     */
    public void commandAction(Command c, Displayable d) {
        if (c == cmdExit) {
            can.stopFlag = true;
            notifyDestroyed();
        }
    }
    
    class M3GCanvas extends GameCanvas implements Runnable{
        boolean stopFlag;
        private World myWorld;
        
        public M3GCanvas(boolean suppressKeyEvents) {
            super(suppressKeyEvents);
            
            try {
                //装载文件
                Object3D[] roots = Loader.load("/M3GTest.m3g");
                //World是第一个根节点
                myWorld = (World)roots[0];
            } catch(Exception e) {
                System.out.println("装载3D图像异常：" + e.toString());
            }
            
            stopFlag = false;
            //开始线程
            new Thread(this).start();
        }
        
        
        public void run() {
            Graphics g = getGraphics();
            while (!stopFlag) {
                //绘制3D图像
                Graphics3D myGraphics3D = Graphics3D.getInstance();
                try {
                    myGraphics3D.bindTarget(g);
                    myGraphics3D.render(myWorld);
                } finally {
                    myGraphics3D.releaseTarget();
                }
                
                //绘制后台缓冲屏幕
                flushGraphics();
                
                try {
                    Thread.sleep(500); //暂停一段时间
                } catch(InterruptedException ex){
                }
            }
        }
    }
    
}