将 Actions.scaleTo() 添加到 LibGDX 中的标签

2022-01-12 00:00:00 android java libgdx

在 LibGDX 中，我想为我的游戏制作文本动画.因此，我希望我的标签随着时间的推移而变大.但是如果我使用 scaleTo() 方法，什么都不会发生，而像 moveTo() 这样的其他动作可以正常工作.

In LibGDX, I want to make a text animation for my game. Therefore, I want that my labels gets larger with time. But if I use the scaleTo() method, nothing happens whereas other Actions like moveTo() work fine.

label1 = new Label("Test text", new Label.LabelStyle(font, Color.BLACK));
label2.addAction(Actions.parallel(Actions.moveTo(500, 300, 2.0f),Actions.scaleTo(0.1f, 0.1f,2.0f)));

label2 = new Label("Test text 2", new Label.LabelStyle(font, Color.BLACK));
label2.addAction(Actions.parallel(Actions.moveTo(500, 300, 2.0f),Actions.scaleTo(0.1f, 0.1f,2.0f)));

stage.addActor(label1);
stage.addActor(label2);

如何让我的标签按比例缩放?提前谢谢！

How can I make my labels scale? Thank you in advance!

推荐答案

出于性能原因，大多数scene2d.ui组默认将transform设置为false.

For performance reason most scene2d.ui groups have transform set to false by default.

更多详情请查看
https://github.com/libgdx/libgdx/wiki/Scene2d.ui#rotation-and-scale

如果你想缩放，你可以使用 Container 来设置单个小部件的大小和对齐方式.

If you want to scale, you can use Container which is useful for setting the size and alignment of a single widget.

private Container<Label> container;

@Override
public void create() {
    stage=new Stage();

    Label label1 = new Label("Test text", new Label.LabelStyle(font, Color.BLACK));

    container=new Container<Label>(label1);
    container.setTransform(true);   // for enabling scaling and rotation
    container.size(100, 60);
    container.setOrigin(container.getWidth() / 2, container.getHeight() / 2);
    container.setPosition(100,200);
    container.setScale(3);  //scale according to your requirement

    stage.addActor(container);
}

@Override
public void render() {
    super.render();

    Gdx.gl.glClearColor(1,1,1,1);
    gl.glClear(GL20.GL_COLOR_BUFFER_BIT);

    stage.draw();
    stage.act();
}

在容器而不是标签上添加您的操作.

Add your Action on container instead of Label.

container.addAction(Actions.parallel(Actions.moveTo(500, 300, 2.0f),Actions.scaleTo(0.1f, 0.1f,2.0f)));

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