Box2D的/ AndEngine - ContactListener多个对象类 [英] Box2D/AndEngine - ContactListener for multiple object classes

问题描述

我正在开发在Java中一个小的Andr​​oid游戏，使用AndEngine图形和Box2D的物理学 - 具体而言，冲突处理。我有一些不同类型的对象，在类的构造函数，像这样：

I'm developing a little Android game in Java, using AndEngine for graphics and Box2D for physics - specifically, collision handling. I have some different types of objects with constructors in classes, like so:

MainActivity.java
Enemy.java
Npc.java
Door.java

我在主类中的静态PhysicsWorld，我被设置从敌人类ContactListener，确定会发生什么，当敌人之一击中的东西。不过，我试图建立另一个ContactListener的大门类，当我发现每个PhysicsWorld只有一个ContactListener。

I have a static PhysicsWorld in the main class, and I was setting up a ContactListener from the Enemy class, to define what happens when one of the enemies hits something. However, I tried to set up another ContactListener for the Door class, when I discovered that each PhysicsWorld has only one ContactListener.

从本质上讲，我的问题是：什么是解决这个问题的最好办法。

Essentially, my question is this: what is the best way to get around this?

我知道我可能已经说明了这不太好，所以我的道歉。

I'm aware I've probably explained this rather badly, so my apologies.

推荐答案

您可以使用单一的 ContactListener 来管理整个世界; Contact.getFixtureA / B（）将返回参与接触的装置。您可以利用 Fixture.getBody（）来获得相关的机身每次碰撞夹具;如果，例如，你的门和敌人对象与正文相关译文]用户数据，那么你可以使用 Body.getUserData（）来检索。

You can use your single ContactListener to manage the entire world; Contact.getFixtureA/B() will return the fixtures involved in the contact. You can utilize Fixture.getBody() to get the associated Body with each collision fixture; if, for example, your Door and Enemy objects are associated with the Bodys as user data, then you can use Body.getUserData() to retrieve that.

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