Sprite動畫Libgdx Java

Question

試圖讓一個二維的，自上而下的精靈旋轉並動畫化，我在渲染它的主類中創建了一個單獨的“資產”類。 旋轉有效，但是子畫面停留在同一幀上。 我使用libgdx Wiki嘗試對我的精靈進行動畫處理https://github.com/libgdx/libgdx/wiki/2D-Animation

這是資產類中的代碼：

public class Asset implements ApplicationListener, Screen{

    public static Texture walkSheet;




    private static final int    FRAME_COLS = 4;     
    private static final int    FRAME_ROWS = 2;     

    static Animation           walkAnimation;      
    static TextureRegion[]         walkFrames;     
    static TextureRegion           currentFrame;      
    static SpriteBatch spriteBatch;

    static float stateTime;                


    public static void load(){
        walkSheet = new Texture(Gdx.files.internal(".png"));


        TextureRegion[][] tmp = TextureRegion.split(walkSheet, walkSheet.getWidth()/FRAME_COLS, walkSheet.getHeight()/FRAME_ROWS);              // #10
        walkFrames = new TextureRegion[FRAME_COLS * FRAME_ROWS];
        int index = 0;
        for (int i = 0; i < FRAME_ROWS; i++) {
            for (int j = 0; j < FRAME_COLS; j++) {
                walkFrames[index++] = tmp[i][j];
            }
        }
        walkAnimation = new Animation(0.1f, walkFrames);      // #11
        spriteBatch = new SpriteBatch();                // #12
        stateTime = 0f;
        stateTime += Gdx.graphics.getDeltaTime();
        currentFrame = walkAnimation.getKeyFrame(stateTime, true);
    }

這是它的呈現方式：

game.batch.draw(Asset.currentFrame, x, y, (float)85, (float)85, (float)170, (float)170, (float)1, (float)1, (float)angleDegrees + 270);

我需要怎么做才能正確設置精靈的動畫？

Answer 1

框架永遠不會動畫，因為您沒有更新它。 在load()方法中，您執行了以下操作：

stateTime += Gdx.graphics.getDeltaTime();
currentFrame = walkAnimation.getKeyFrame(stateTime, true);  

但這僅在調用load()方法時執行一次。

當您的Asset類實現Screen接口時，您必須已經實現了抽象方法render(float delta) ，因此您需要按照以下方法更新該框架：

 public void render(float delta)
 {
   stateTime += delta;
   currentFrame = walkAnimation.getKeyFrame(stateTime, true);  
   // Then render the frame as follows
   batch.draw(currentFrame, x, y, (float)85, (float)85, (float)170, (float)170, (float)1, (float)1, (float)angleDegrees + 270);
 }

Answer 2

// pass the array of movements to AnimatedActor
// animationFrames = walkSheetArray[moveDirection]; 
// animation = new Animation(1f / 5f, animationFrames);
// myAnimatedActor = new AnimatedActor(animation, rotation)

public class AnimatedActor extends Image {
private float stateTime = 0;
Animation animation;
public AnimatedActor(Animation animation, float rotation) {
super(animation.getKeyFrame(0));
this.animation = animation;
this.rotation = rotation;
}
@Override
public void act(float delta) {
((TextureRegionDrawable) getDrawable()).setRegion(animation.getKeyFrame(stateTime += delta, true));
myAnimatedActor.setRotation(rotation);
super.act(delta);
  }
}

步行架8x8