如何在LibGDX中的表格布局中添加动画？

Posted 2021-04-04

我有一个包含图像和文本行的表。现在，我决定用旋转动画交换图像。有没有办法在表中执行此操作，还是必须使用SpriteBatch来完成此操作？如果是的话，有没有办法保持我的表格，并以某种方式找到图像所在的行/列的正确位置？我不愿意摆脱桌子，因为有很大一部分文字。而使用setWrap旗帜更容易。

答案

对的，这是可能的。

您可以将所有动画内容包装在一个组中。现在在表中插入该组，该表将管理组的位置。

希望这可以帮助。

另一答案

您必须在构造函数的开头加载所有内容

private void loadTextures() {
    walkSheet = new  Texture(Gdx.files.internal("animation_sheet.png"));
    TextureRegion[][] tmp = TextureRegion.split(walkSheet, walkSheet.getWidth() / 
            FRAME_COLS, walkSheet.getHeight() / FRAME_ROWS);
    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(0.025f, walkFrames);

    stateTime = 0f;

    bobTexture = new  Texture(Gdx.files.internal("images/bob.png"));
    blockTexture = new Texture(Gdx.files.internal("images/block.png"));
}

这是绘制精灵的方法：

private void drawBob() {
        Bob bob = world.getBob();

        int facex=1;
        if(bob.facingLeft){
            facex=-1;
        }

        if (bob.state==bob.state.WALKING){
        Gdx.gl.glClear(GL10.GL_COLOR_BUFFER_BIT | GL10.GL_DEPTH_BUFFER_BIT);
        stateTime += Gdx.graphics.getDeltaTime();
        currentFrame = walkAnimation.getKeyFrame(stateTime, true);
        spriteBatch.draw(currentFrame, bob.position.x * ppuX, bob.position.y * ppuY, facex*Bob.SIZE * ppuX, Bob.SIZE * ppuY);

        }
        else if(bob.state==bob.state.IDLE){
            spriteBatch.draw(bobTexture, bob.position.x * ppuX, bob.position.y * ppuY, facex* Bob.SIZE * ppuX, Bob.SIZE * ppuY);
        }

            //spriteBatch.draw(bobTexture, bob.position.x * ppuX, bob.position.y * ppuY, Bob.SIZE * ppuX, Bob.SIZE * ppuY);

    }

只是不要忘记在调用之前开始sprite批处理。

  public void render() {
     spriteBatch.begin();
            drawBlocks();
            drawBob();
     spriteBatch.end();

        if (debug)
            drawDebug();
      }

完整的代码可以在我的重新博客中找到：http://www.sadafnoor.com/blog/adding-animation-on-character-movement-using-libgdx/

另一答案

随意使用它:(代码原样，不保修）

实现自己的可以显示动画的Actor：

import com.badlogic.gdx.graphics.g2d.Animation;
import com.badlogic.gdx.graphics.g2d.Batch;
import com.badlogic.gdx.graphics.g2d.TextureRegion;
import com.badlogic.gdx.scenes.scene2d.Actor;

/**
 * nils honermann (zeg)
 * - no warranty, free to use
 */
public class GdxAnimationActor extends Actor {

    private Animation animation;

    public void dispose(){
        for(TextureRegion tr : animation.getKeyFrames()){
            tr.getTexture().dispose();
        }
        animation = null;
    }

    public GdxAnimationActor(Animation animation){
        this.animation=animation;
        TextureRegion first = animation.getKeyFrame(0f);
        setBounds(first.getRegionX(),first.getRegionY(),first.getRegionWidth(),first.getRegionHeight());
    }

    @Override
    public void draw(Batch batch, float parentAlpha) {
        super.draw(batch, parentAlpha);
        // TODO: Should be multiplied with the actor's alpha, allowing a parent's alpha to affect all children.

        TextureRegion current = animation.getKeyFrame(elapsed/1000.0f/*millis into seconds float*/);
        batch.draw(current,getX(), getY(), getOriginX(), getOriginY(), getWidth(), getHeight(), getScaleX(), getScaleY(), getRotation());

        if(renderedOnce){
            elapsed += System.currentTimeMillis() - millisLastRender;
        }
        millisLastRender = System.currentTimeMillis();
        renderedOnce = true;
    }

    private float elapsed = 0;
    private boolean renderedOnce;
    private long millisLastRender = 0;
}

并将动画传递给它。

float fps = 0.1f; //1 texture per 100 millis
Array<TextureRegion> textureArray = new Array<>(3);
textureArray.size = 3;
textureArray.set( (0) , new TextureRegion(new Texture(/*assets*/"example1.png");) );
textureArray.set( (1) , new TextureRegion(new Texture(/*assets*/"example2.png");) );
textureArray.set( (2) , new TextureRegion(new Texture(/*assets*/"example3.png");) );
Animation animation = new Animation(fps,textureArray,Animation.PlayMode.LOOP);
GdxAnimationActor animationActor = new GdxAnimationActor(animation);

只需将animationActor添加到舞台，窗口或表格中即可。