J2ME 3D学习笔记——实现简单的界面(附代码)-优快云博客

博客给出了MIDlet和M3GCanvas的代码示例。MIDlet类实现了应用启动等方法，M3GCanvas类用于处理3D图形绘制，包括导入图片、获取相关对象、绑定渲染等操作，还处理了按键事件，如按UP键移动相机。

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//MIDlet代码

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

public class Test3DMIDlet extends MIDlet{
M3GCanvas m3g = new M3GCanvas();
public void startApp(){
Display.getDisplay(this).setCurrent(m3g);
}

public void pauseApp(){}
public void destroyApp(boolean b){}
}

//Canvas代码

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

public class M3GCanvas extends Canvas{
/**World对象*/
private World world;
/**Graphics3D对象*/
Graphics3D g3d;
/**Camera对象*/
Camera camera;

public M3GCanvas(){
try{
//导入图片
Object3D[] obj = Loader.load("/res/pogoroo.m3g");
//获得图片中的World对象
for(int i = 0;i < obj.length;i++){
if(obj[i] instanceof World){
world = (World)obj[i];
break;
}
}
//获得Graphics3D对象
g3d = Graphics3D.getInstance();
//获得获得Camera
camera = world.getActiveCamera();
}catch(Exception e){
System.out.println(e);
}

}

public void paint(Graphics g){
try{
//绑定
g3d.bindTarget(g);
//代理
g3d.render(world);

}catch(Exception e){

}finally{
//释放
g3d.releaseTarget();
}
}

public void keyPressed(int keyCode){
int action = this.getGameAction(keyCode);

if(action == Canvas.UP){
//移动相机
camera.setTranslation(0,0,0.2f);
}
//重新绘制
repaint();
}
}