Physics 碰撞检测回调方法出错或者没有效果解决方法

1.碰撞检测回调方法编译出错;

auto *listener = EventListenerPhysicsContact::create();

listener->onContactBegin = CC_CALLBACK_1(HelloWorld::onContactBegin,this);

在3.0rc版本中回调函数的参数变为一个,不能使用原来的两个参数;

bool HelloWorld::onContactBegin(PhysicsContact& contact)

{

    auto spriteA = (Sprite*)contact.getShapeA()->getBody()->getNode();

    auto spriteB = (Sprite*)contact.getShapeB()->getBody()->getNode();

    return true;

}

2.回调方法不调用

添加如下代码:

PhysicsBody * body = PhysicsBody::createCircle(_ball->getContentSize().width/2);

PhysicsBody * body2 = PhysicsBody::createCircle(_ball->getContentSize().width/2);

body->setMass(1.0f);

body->setContactTestBitmask(0xFFFFFFFF);

body2->setMass(1.0f);

body2->setContactTestBitmask(0xFFFFFFFF);