Libgdx创建屏幕控制 [英] Libgdx Creating On Screen Controls

问题描述

我使用libgdx框架来创建一个游戏。我试图创建屏幕上的按钮/控制。

I am using the libgdx framework to create a game. I'm trying create onscreen buttons/controls.

目前，我有一个

class LevelOne that implements Screen. 

本类有一个私有变量世界（从Box2D的）

This class has a private variable world (From Box2d)

我要添加
    表Textbuttons或Libgdx触摸板的Box2D的世界。
但是，我不知道如何做到这一点。

I want to add a Table with Textbuttons or a Libgdx Touchpad to the Box2d world. However, I'm not sure how to do this.

接下来，我知道我可以表或触摸板添加到Libgdx舞台。反正是有得到Libgdx阶段的Box2D世界这么一起工作，我可以在触摸板或表添加到box2d的世界。

Next, I know I can add a table or a touchpad to a Libgdx Stage. Is there anyway to get the Libgdx stage and Box2d world to work together so, I can add a Touchpad or Table to the Box2d world.

推荐答案

有关屏幕控制，你可以做这样的：

For onscreen controls, you can do it like this:

请新的凸轮将被固定的控件：

Make a new cam which will be fixed for the controls:

OrthographicCamera guicam = new OrthographicCamera(480, 320);
guicam.position.set(480/2F, 320/2F, 0);

请一（libgdx）矩形为每个控件：

Make a (libgdx) Rectangle for each control:

Rectangle wleftBounds = new Rectangle(0, 0, 80, 80);
Rectangle wrightBounds = new Rectangle(80, 0, 80, 80);

然后就可以查询输入，看看用户是否接触这些矩形：

Then you can poll the Input to see if the user is touching these rectangles:

//in render method
for (int i=0; i<5; i++){
    if (!Gdx.input.isTouched(i)) continue;
    guicam.unproject(touchPoint.set(Gdx.input.getX(i), Gdx.input.getY(i), 0));
    if (wleftBounds.contains(touchPoint.x, touchPoint.y)){
        //Move your player to the left!
    }else if (wrightBounds.contains(touchPoint.x, touchPoint.y)){
        //Move your player to the right!
    }
}

通知我检查前5个触摸索引，那是因为你一定会希望有正在同时使用的控制（即跳边移动边右）。

Notice I'm checking the first 5 touch indexes, thats because you will surely want to have controls that are being used at the same time (i.e. Jumping while Moving Right).

最后但并非最不重要的，你会希望通过控制来画一些漂亮的图形：

Last but not least, you will want to draw some nice graphics over the controls:

batch.draw(leftRegion, wleftBounds.x, wleftBounds.y, wleftBounds.width, wleftBounds.height);
batch.draw(rightRegion, wrightBounds.x, wrightBounds.y, wrightBounds.width, wrightBounds.height);

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