import javax.microedition.lcdui.*;import javax.microedition.lcdui.game.*;import javax.microedition.m3g.*;public class M3GCanvas extends GameCanvas implements Runnable {    private Graphics3D g3d ;    private Camera camera;    private World world;    private Light light;    private Sprite3D sprite;    private Graphics g;    private Background background ;    private Image2D image2D;    public M3GCanvas(){        super(true);        world = new World();        camera = new Camera();        camera.setPerspective(70.0f, 1.0f, 1.0f, 10000.0f);        camera.setTranslation(0.0f, 0.0f, 40.0f);        world.addChild(camera);        world.setActiveCamera(camera);        light = new Light();        light.setTranslation(0.0f, 0.0f, 40.0f);        world.addChild(light);        background = new Background();        background.setColor(0xffF0F00F);        background.setDepthClearEnable(true);        world.setBackground(background);        try {          image2D = (Image2D)Loader.load("/fish.png")[0];        }catch (Exception e)        { System.out.println("Cannot make image"); }        sprite = new Sprite3D(true, image2D, new Appearance());        sprite.setScale(20.0f, 20.0f, 20.0f);        world.addChild(sprite);        Thread t = new Thread(this);        t.start();    }    public void run() {        Graphics g = getGraphics();        while(true) {        g.setColor( 255, 255, 255 );        g.fillRect( 0, 0, getWidth(), getHeight() );         g3d = Graphics3D.getInstance();          double temp = Math.tan((1.0f - (float)Math.cos(System.currentTimeMillis()))*0.5f);        sprite.setTranslation(0.0f, 0.0f, (float)(temp*temp*temp) * -100.0f + 30.0f);                try{          g3d.bindTarget(g);          g3d.render(world);               }catch(Exception e){            System.err.println(e);        }finally{            g3d.releaseTarget();        }        flushGraphics();            try {                Thread.sleep(200);             }            catch (InterruptedException e) {                            }        }    }  }