cocos3 物理引擎

Scene* HelloWorld::createScene()
{
    auto scene = Scene::createWithPhysics();
    scene->getPhysicsWorld()->setDebugDrawMask(PhysicsWorld::DEBUGDRAW_ALL);

    auto layer = HelloWorld::create();

    scene->addChild(layer);

    return scene;
}

bool HelloWorld::init()
{

    if ( !Layer::init() )
    {
        return false;
    }

    Size size = Director::getInstance()->getVisibleSize();
    Vec2 origin = Director::getInstance()->getVisibleOrigin();

    return true;
}

void HelloWorld::onEnter()
{
    addEdge();
    addBall();
}

void HelloWorld::addEdge()
{
    Size size = Director::getInstance()->getVisibleSize();
    Size liteSize=size;
    liteSize.width-=10;
    liteSize.height-=20;
    auto edgeBox=PhysicsBody::createEdgeBox(liteSize);

    auto node=Node::create();
    node->setPosition(size.width/2,size.height/2);
    node->setPhysicsBody(edgeBox);
    addChild(node);
}

void HelloWorld::addBall()
{
    Size size = Director::getInstance()->getVisibleSize();
    auto ball=Sprite::create("ball.png");
    ball->setPosition(size.width/2,size.height/2);
    ball->setPhysicsBody(PhysicsBody::createBox(ball->getContentSize()));
    addChild(ball);

}