在 Cocos2d & 中获取身体的接触点Box2d

问题描述

我对 Cocos2d 和 Box2d 非常新，我一直在关注教程和一般是黑客攻击.不过，我有一个我无法解决的问题.

I'm very new to Cocos2d and Box2d, I have been following tutorials and generally hacking. However, I have one problem I cannot solve.

我创建了 2 个物体和固定装置(在 Box2d 世界中)并创建了一个Contact Listener"对象.此对象存储联系人列表以及联系人".

I create 2 bodies and fixtures (in the Box2d world) and create a "Contact Listener" object. This object stores a list of contacts along with the "contact point".

当两个物体发生碰撞时，会报告一个接触点，但这(我认为)是在世界坐标系中.

When the two bodies collide a contact point is reported but this (I think) is in the world co-ordinate system.

我的问题是我似乎无法将接触点转换为两个身体上的可用坐标.

My problem is I can't seem to convert the contact point to a usable co-ordinate on both of the bodies.

我想在精灵(连接到身体)在双方的联络点身体/固定装置.

I want to add a crack graphic to the sprite (connected to the body) at the point of contact on both bodies/fixtures.

有人解决了吗?我可能存储相对于世界"的接触点"是完全错误的方式.

Has anyone solved this? I may be storing the "contact point" relative to the "world" is completely the wrong way to go.

推荐答案

查看 这个.看看 b2Body::GetLocalPoint(const b2Vec2 &worldPoint)

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