Unity3D - RigidBody vs Collider

最新推荐文章于 2023-04-09 15:41:15 发布

转载最新推荐文章于 2023-04-09 15:41:15 发布 · 396 阅读

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本文介绍了在Unity中如何使用碰撞体(Collider)与刚体(Rigidbody)，即使没有刚体也可以存在碰撞体，Unity会认为这样的物体是静态不可移动的。而为物体配备刚体组件则开启了该物体与其他碰撞体之间的碰撞检测。

转自RigidBody vs Collider

You can indeed have a collider with no rigidbody. If there's no rigidbody then Unity assumes the object is static, non-moving. Unity does not bother testing for collisions BETWEEN static objects. As you can imagine, this is very efficient if you have lots of scenery the player can bump into.

So the purpose of having a kinematic rigidbody, rather than no rigidbody, is to turn on collision detection between this object and all other colliders in the scene (even the static ones.) Effectively you are letting Unity know that this object moves around, so Unity will then do collision-detection between it and everything else.

(If you had a game with only two objects in it, and both move kinematically, in theory you would only need a rigidbody on one of them, even though they both move. I haven't tried it. But now imagine three such objects- you'd have to have rigidbodies on two of them. So in practice you'll usually just put rigidbodies on everything that both moves and collides.)