如何使用 box2d 在 libgdx 中拖动对象?
我已将对象添加到 libgdx 中的 box2d 世界.
我想知道是否可以用鼠标拖动对象?如果是这样，怎么做?
I have added objects to a box2d world in libgdx.
I am wondering if it was possible to drag objects with the mouse? If so, how?
谢谢！
推荐答案
这里有几个选项.您可以使用鼠标关节，也可以使用运动体并手动设置其位置.如何使用鼠标关节的一个很好的例子看看这个:
There are a couple of options here. You can use a mouse joint or you can use a kinematic body and set it's position manually. A good example of how to use a mouse joint check this out:
http://code.google.com/p/libgdx-backend-android-livewallpaper/source/browse/gdx-backend-android-livewallpaper-示例/src/com/badlogic/gdx/tests/box2d/Box2DTest.java?r=ba02aaf34a8ca07daa0c30493bab993067c652f9
如果您想使用运动体，您可以这样做:
If you want to use a kinematic body you would do this:
在渲染()中:
body.setTransform(Gdx.input.getX(), Gdx.input.getY(), 角度);
body.setTransform(Gdx.input.getX(), Gdx.input.getY(), angle);
然后你会说 body.getPosition() 来渲染你的精灵.或者，如果您正在使用调试渲染器来绘制您的身体，但只是绘制形状.
And then you would say body.getPosition() for the rendering of your sprites. Or if you are using the debug renderer that will draw your bodies, but just as shapes.
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