Question

我有一个奇怪的问题。当我的球员与身体发生碰撞时，他的镜头会毫无问题地摧毁它，但是，当它立即击中两个身体时，它会崩溃。

射击运动员

b2Body *shooting = [_lhelper newBodyWithUniqueName:@"shoot" world:_world];
CCSprite *shootingSprite = (CCSprite *)shootingBody->GetUserData();
shootingBody.position = pos;
shootingBody->SetTransform(b2Vec2(pos.x/PTM_RATIO, 
                               pos.y/PTM_RATIO), 
                        CC_DEGREES_TO_RADIANS(angle));

接触

if([spriteA tag] == ENEMY && [spriteB tag] == SHOT)
{


    int animIdx = [(NSNumber*)[spriteA userData] intValue];
    if(animIdx < 2)
    {
        [spriteA setTextureRect:MY_RECTS[animIdx]];
        [spriteA setUserData:[NSNumber numberWithInt:animIdx+1]];
    }
    else
    {
        [objectThatWillBeDeleted addObject:[NSValue valueWithPointer:bodyA]];

    }

    [objectThatWillBeDeleted addObject:[NSValue valueWithPointer:bodyB]];

}
else if([spriteB tag] == ENEMY && [spriteA tag] == SHOT)
{


    int animIdx = [(NSNumber*)[spriteB userData] intValue];

    if(animIdx < 2)
    {        
        [spriteB setTextureRect:MY_RECTS[animIdx]];    
        [spriteA setUserData:[NSNumber numberWithInt:animIdx+1]];
    }
    else
    {
        [objectThatWillBeDeleted addObject:[NSValue valueWithPointer:bodyB]];
    }

    [objectThatWillBeDeleted addObject:[NSValue valueWithPointer:bodyA]];

}

更新

    std::vector<Contact>::iterator pos;
for(pos = _contactListener->_contacts.begin(); 
    pos != _contactListener->_contacts.end(); ++pos) 
{
    Contact contact = *pos;

    //[self checkBodies2:&contact];         

}


for(NSValue* val in objectThatWillBeDeleted)
{
    b2Body* body = (b2Body*)[val pointerValue];
    [_lhelper removeBody:body];
}

    [objectThatWillBeDeleted removeAllObjects];
}

}

我不明白错误在哪里。

Answer 1

我不明白错误在哪里，因为你没有说它崩溃的地方:) 但我猜你想要两次摧毁同一个身体。

当镜头在同一时间步中击中两个敌人时，镜头体会被添加到objectThatWillBeDeleted列表两次。你只需要在销毁它的内容之前使该列表唯一。

身体之间的奇怪接触

1 个答案: