3D的screen，仿照2D来写。

准备部分

3D场景基类接口

package sence;

import com.badlogic.gdx.ApplicationListener;
import com.badlogic.gdx.Game;

public interface Sence3D {

    /** Called when this screen becomes the current screen for a {@link Game}. */
    public void show ();

    /** Called when the screen should render itself.
     * @param delta The time in seconds since the last render. */
    public void render (float delta);

    /** @see ApplicationListener#resize(int, int) */
    public void resize (int width, int height);

    /** @see ApplicationListener#pause() */
    public void pause ();

    /** @see ApplicationListener#resume() */
    public void resume ();

    /** Called when this screen is no longer the current screen for a {@link Game}. */
    public void hide ();

    /** Called when this screen should release all resources. */
    public void dispose ();
}

自己的是实现方式

public class BaseScreen implements Sence3D {
    protected InputMultiplexer multiplexer;
    private CubeSolveInputProcessor camController;

    protected Stage3D stage3D;
    private Stage stage;
    private Label fps;
    protected CubeSolve solve;

    public BaseScreen(CubeSolve cubeSolve){
        this.solve = cubeSolve;
        multiplexer = new InputMultiplexer();
        camController = new CubeSolveInputProcessor(cubeSolve.getViewport3D().getCamera());

        stage3D = new Stage3D(cubeSolve.getViewport3D(),cubeSolve.getModelBatch());
        stage = new Stage(cubeSolve.getViewport(),cubeSolve.getHudBatch());
        multiplexer.addProcessor(stage);
        multiplexer.addProcessor(camController);

        Gdx.input.setInputProcessor(multiplexer);

        fps = new Label("",new Label.LabelStyle(){
            {
                font = new BitmapFont(Gdx.files.internal("Bahnschrift-Regular_40_1.fnt"),
                        Gdx.files.internal("Bahnschrift-Regular_40_1.png"),false);
            }
        });
        fps.setPosition(30,Constant.height - 30, Align.topLeft);
        stage.addActor(fps);
    }

    @Override
    public void show() {

    }

    @Override
    public void render(float delta) {
        fps.setText(Gdx.graphics.getFramesPerSecond()+" :fps");
        stage.act();
        stage.draw();

        stage3D.act();
        stage3D.draw();
    }

    @Override
    public void resize(int width, int height) {


    }

    @Override
    public void pause() {

    }

    @Override
    public void resume() {

    }

    @Override
    public void hide() {

    }

    @Override
    public void dispose() {

    }

    public void addActor(Actor actor){
        stage.addActor(actor);
    }

    public void addActor3d(Actor3D actor3D){
        stage3D.addActor(actor3D);
    }

}

那么首先我们相机怎么使用

和2D一样在Stage中写

public class Stage3D extends InputAdapter implements Disposable {
    private Viewport3D viewport3D;
    private ModelBatch batch;
    private Group3D group3D;
    private GameController controller;

    public Stage3D(Viewport3D viewport3D, ModelBatch batch){
        this.viewport3D = viewport3D;
        this.batch = batch;
        this.group3D = new Group3D();
        controller = new GameController((PerspectiveCamera) viewport3D.getCamera());
    }

    public void act(){
        checkTileTouched();
        group3D.act(Gdx.graphics.getDeltaTime());
    }

    public void draw(){
        batch.begin(viewport3D.getCamera());
        group3D.draw(batch, viewport3D.getEnvironment());
        batch.end();
    }

    public void addActor(Actor3D actor3D) {
        group3D.addActor3d(actor3D);
    }

    public Group3D getRoot() {
        return group3D;
    }

    @Override
    public void dispose() {

    }

//    final Vector3 intersection = new Vector3();
    private void checkTileTouched() {
        if (Gdx.input.justTouched()) {
            System.out.println("touch down ："+Gdx.input.getX()+"    "+Gdx.input.getY());
            Ray pickRay = viewport3D.getCamera().getPickRay(Gdx.input.getX(), Gdx.input.getY());

            float distance = -1;
            Actor3D actor3D = null;
            for (Actor3D child : getRoot().getChildren()) {
                float dist2 = child.hit1(pickRay);
                if (dist2 >= 0f && (distance < 0f || dist2 <= distance)) {
                    actor3D = child;
                    distance = dist2;
                }
            }
        }
}