防止 SKNode 相互施力

问题描述

我有两个 SKNode 对象.当它们碰撞时，它们的位置会发生变化.

I have two SKNode objects. Their positions change when they collide.

如何防止这种情况发生?同时，我还是希望能够通过-(void)didBeginContact;

How can I prevent that? At the same time, I still want to be able to respond to them contacting via - (void)didBeginContact;

我尝试将它们的 mass 属性都设置为 0.0f 但这不起作用.

I tried setting both their mass property to 0.0f but that didn't work.

推荐答案

您可以通过设置类别、碰撞和接触位掩码来实现.

You can achieve that by setting category, collision and contact bit masks.

uint32_t bodyABitMask = 1<<0;
uint32_t bodyBBitMask = 1<<1;

//A mask that defines which categories this physics body belongs to.
[bodyA setCategoryBitMask:bodyABitMask];
[bodyB setCategoryBitMask:bodyBBitMask];

//A mask that defines which categories of physics bodies
//can collide with this physics body.
[bodyA setCollisionBitMask:0];
[bodyB setCollisionBitMask:0];

//A mask that defines which categories of bodies cause
//intersection notifications with this physics body.
[bodyA setContactTestBitMask:bodyBBitMask];
[bodyB setContactTestBitMask:bodyABitMask];

在上述情况下，bodyA 和 bodyB 不能发生碰撞，但是一旦它们接触，您就会收到 didBeginContact.

In above case bodyA and bodyB cannot collide, but you will receive didBeginContact once they are in contact.

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