使用单个精灵表动画精灵

Question

我之前通过为每个状态设置一个单独的 .png 和一个 textureAtlas 文件来为精灵的不同状态（站立/行走/跳跃）制作动画。它工作正常。现在我将这些单独的表格组合成一个 png 并生成一个 .pack 文件。现在我可以按地区访问这些状态，但它们不再具有动画效果？只绘制每个状态的第一个精灵，而不是整个动画。

package com.mygdx.game;

import com.badlogic.gdx.ApplicationAdapter;
import com.badlogic.gdx.Gdx;
import com.badlogic.gdx.Input;
import com.badlogic.gdx.InputProcessor;
import com.badlogic.gdx.graphics.GL20;
import com.badlogic.gdx.graphics.g2d.Animation;
import com.badlogic.gdx.graphics.g2d.SpriteBatch;
import com.badlogic.gdx.graphics.g2d.TextureAtlas;

public class MyGdxGame extends ApplicationAdapter implements InputProcessor {
    private SpriteBatch batch;
    private TextureAtlas textureAtlas;
    private TextureAtlas textureAtlas2;
    private Animation animation;
    private Animation animation2;
    private Animation currentAnimation;
    private float elapsedTime = 0;

    @Override
    public void create() {
        batch = new SpriteBatch();
        textureAtlas = new TextureAtlas(Gdx.files.internal("Wolverine.txt"));
        animation = new Animation(1/7f, textureAtlas.findRegion("Standing"));
        animation2 = new Animation(1/7f, textureAtlas.findRegion("Walking"));
        currentAnimation = animation;

        Gdx.input.setInputProcessor(this);
    }

    @Override
    public void dispose() {
        batch.dispose();
        textureAtlas.dispose();
    }

    @Override
    public void render() {
        Gdx.gl.glClearColor(0, 0, 0, 1);
        Gdx.gl.glClear(GL20.GL_COLOR_BUFFER_BIT);

        batch.begin();
        //sprite.draw(batch);
        elapsedTime += Gdx.graphics.getDeltaTime();
        batch.draw(currentAnimation.getKeyFrame(elapsedTime, true), 0, 0);
        batch.end();
    }

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

    @Override
    public void pause() {
    }

    @Override
    public void resume() {
    }

    @Override
    public boolean keyDown(int keycode) {
        if (keycode == Input.Keys.LEFT) {
            currentAnimation = animation2;
        }
            return true;

    }

    @Override
    public boolean keyUp(int keycode) {
        return false;
    }

    @Override
    public boolean keyTyped(char character) {
        return false;
    }

    @Override
    public boolean touchDown(int screenX, int screenY, int pointer, int button) {
        return false;
    }

    @Override
    public boolean touchUp(int screenX, int screenY, int pointer, int button) {
        return false;
    }

    @Override
    public boolean touchDragged(int screenX, int screenY, int pointer) {
        return false;
    }

    @Override
    public boolean mouseMoved(int screenX, int screenY) {
        return false;
    }

    @Override
    public boolean scrolled(int amount) {
        return false;
    }
}

这是我与 spritesheet 一起使用的数据文件

Wolverine.png
size: 256, 256
format: RGBA8888
filter: Linear,Linear
repeat: none
Standing
  rotate: false
  xy: 0, 0
  size: 64, 64
  orig: 64, 64
  offset: 0, 0
  index: 1
Standing
  rotate: false
  xy: 64, 0
  size: 64, 64
  orig: 64, 64
  offset: 0, 0
  index: 2
Standing
  rotate: false
  xy: 128, 0
  size: 64, 64
  orig: 64, 64
  offset: 0, 0
  index: 3
Walking
  rotate: false
  xy: 192, 0
  size: 64, 64
  orig: 64, 64
  offset: 0, 0
  index: 1
Walking
  rotate: false
  xy: 0, 64
  size: 64, 64
  orig: 64, 64
  offset: 0, 0
  index: 2
Walking
  rotate: false
  xy: 64, 64
  size: 64, 64
  orig: 64, 64
  offset: 0, 0
  index: 3
Walking
  rotate: false
  xy: 128, 64
  size: 64, 64
  orig: 64, 64
  offset: 0, 0
  index: 4
Walking
  rotate: false
  xy: 192, 64
  size: 64, 64
  orig: 64, 64
  offset: 0, 0
  index: 5
Walking
  rotate: false
  xy: 0, 128
  size: 64, 64
  orig: 64, 64
  offset: 0, 0
  index: 6

Answer 1

问题是您只为Animation 构造函数提供了一个动画帧。确切地说，您正在使用此构造函数：

    public Animation(float frameDuration, TextureRegion... keyFrames)

只有一帧。您需要将您想要在动画中的所有帧传递给 Animation。

在您的textureAtlas 内，所有站立或行走精灵实际上都只是站立或行走的名称他们应该被命名为例如

    Standing0
    Standing1
    Standing2
    ...

和

    Walking0
    Walking1
    Walking2
    Walking3
    ...

它们在动画中的顺序。在将动画文件打包到纹理图集之前，像这样重命名它们，或者作为热修复，您可以在 .pack 文件中重命名它们。

然后就可以使用了

    public Array<TextureAtlas.AtlasRegion> findRegions(java.lang.String name)

获取所有站立/行走帧以将它们传递给动画的方法，因此：

    textureAtlas.findRegions("Standing")