我需要在 JBox2D Android 游戏中碰撞后摧毁其中一个物体。我发现当 body 接触时，JBox2D 世界会被锁定。我想在碰撞后摧毁其中一具尸体。世界解锁后我能接到回电吗？我找到了一个选项，可以将主体添加到数组中以销毁它。但什么时候毁掉肉体呢？我在这个游戏中没有使用 andengine/libgdx 。在下面找到我的碰撞监听器类，
private class CollisionListener implements ContactListener {
@Override
public void beginContact(Contact contact) {
Object fixtureA = contact.getFixtureA().getUserData();
Object fixtureB = contact.getFixtureB().getUserData();
Body mBodyA = contact.getFixtureA().getBody();
Body mBodyB = contact.getFixtureB().getBody();
if (fixtureA instanceof Bullet) {
destroyBalloonBody(mBodyB);
}
if (fixtureB instanceof Bullet) {
destroyBalloonBody(mBodyA);
}
}
@Override
public void endContact(Contact contact) {
}
@Override
public void postSolve(Contact contact, ContactImpulse contactImpulse) {
}
@Override
public void preSolve(Contact contact, Manifold manifold) {
}
}
public void destroyBalloonBody(Body balloon){
//Can i start a new thread which is having a loop until the world become release for destroying the body
//Or
//Do i need to add the body to a deletionArrayList to destroy it.
}
最佳答案
我认为问题在于您试图在碰撞回调期间移除主体。
来自 Box2D 手册:
It is tempting to implement game logic that alters the physics world inside a contact callback. For example, you may have a collision that applies damage and try to destroy the associated actor and its rigid body. However, Box2D does not allow you to alter the physics world inside a callback because you might destroy objects that Box2D is currently processing, leading to orphaned pointers.
也就是说，您不应该在碰撞回调中销毁实体。
您应该存储对要销毁的实体的引用，并在更新周期后使用世界引用销毁它们。
这是您所需要的吗？
关于android - 碰撞时摧毁 body JBox2D android，我们在Stack Overflow上找到一个类似的问题： https://stackoverflow.com/questions/22958877/