游戏动画2d。使用Libgdx

Question

我正在学习在大学里做游戏。
我有一个小问题，我需要帮助为我的游戏（弹跳经典游戏）设置2D动画。
我不知道如何加载和使用TextureRegion[][]，因为对于普通动画（由4 png制作），效果很好，但是对png矩阵不起作用

这是我的课堂动画

public abstract class Animations extends Sprite {

    protected TextureAtlas atlas = new TextureAtlas("sprites/Animation_light_Ball.atlas");

    protected Body body;

    protected TextureRegion ballStand;

    protected Array<TextureRegion> frames;

    protected float radius = 42;
    protected float stateTimer;
    private static final int BOUNDS_WIDTH = 90;
    private static final int BOUNDS_HEIGHT = 90;

    public Animations() {
    }


    public Animations(final String nameRegion) {
        setRegion(new TextureRegion(atlas.findRegion(nameRegion),0,0,120,120));
        setBounds(0,0,BOUNDS_WIDTH,BOUNDS_HEIGHT); 
    }
    public Animation setAnimation(final int startFrame, final int endFrame, final String animationName,
            final int height, final int width) {
        final float duration = 0.12f;
        frames = new Array<>();
        for (int i = startFrame; i < endFrame; i++) {
            frames.add(new TextureRegion(atlas.findRegion(animationName), i * 120, 0, height, width));
        }
        return new Animation(duration, frames);
    }

    public void cleanFrames() {
        frames.clear();
    }

    public void dispose() {
        atlas.dispose();
    }

    public void draw(final Batch batch) {
        super.draw(batch);
    }

    protected abstract void update(float dt);


}

这是我的课程ballViewImpl

public class BallViewImpl extends Animations implements BallView {

    public World world;
    public Body body;

    private static final int BOUNDS_WIDTH = 90;
    private static final int BOUNDS_HEIGHT = 90;

    public State currentState;
    public State previousState;

    private TextureRegion ballStand;
    private Animation rollingBall;
    private float stateTimer;
    private Ball ball;
    private boolean rollingRight;

    public BallViewImpl() {
        rollingRight= false;
        ballStand = new TextureRegion(atlas.findRegion("Animation_light_ball-1"),0,0,120,120);
        rollingBall = setAnimation(0,4,"Animation_light_ball-1",120,120);
        setBounds(0,0,BOUNDS_WIDTH,BOUNDS_HEIGHT);
    }

     private TextureRegion setSprite(final float delta) {
            TextureRegion region = new TextureRegion();
            region = getFrame(delta);
            if ((body.getLinearVelocity().x < 0 || !rollingRight) && !region.isFlipX()) {
                region.flip(true, false);
                rollingRight = false;
            } else if (rollingRight && region.isFlipX()) {
                region.flip(true, false);
                rollingRight = true;
            }
            return region;
        }

    @Override
    public void setBall(Ball ball) {
        this.ball = ball;
        this.body = ball.getBody();

    }

    @Override
    public float getStateTimer() {
        return stateTimer;
    }

    @Override
    public void update(float dt) {
        rollingRight = ball.isRolling();
        setPosition(body.getPosition().x - getWidth()/2, body.getPosition().y - getHeight()/2);
        setRegion(setSprite(dt));

    }

    private TextureRegion getFrame(float dt) {
         previousState = currentState;
         currentState = ball.getState();  //ballimplement
         stateTimer = currentState == previousState ? stateTimer +dt : 0;

         TextureRegion region = new TextureRegion();
         switch(currentState) {
         case ROLLING:
             region = rollingBall.getKeyFrame(stateTimer,true);
             break;
         case FALLING:
         case STANDING:
         default:
             region = ballStand;
             break;
         }

         return region;
    } 

    @Override
    public void draw(final Batch batch) {
        super.draw(batch);

    }
}