cocos2dx3.0+vs2012编译通过。
主要是通过body->SetTransform来设置body的位置和角度，然后自己写个ContactListener来监听碰撞事件
#include "HelloWorldScene.h" #include "VisibleRect.h" #include "GLES-Render.h" #include "cocos-ext.h" USING_NS_CC; USING_NS_CC_EXT; #define PTM_RATIO 32 Scene* HelloWorld::createScene() { // 'scene' is an autorelease object auto scene = Scene::create(); // 'layer' is an autorelease object auto layer = HelloWorld::create(); // add layer as a child to scene scene->addChild(layer); // return the scene return scene; } // on "init" you need to initialize your instance bool HelloWorld::init() { ////////////////////////////// // 1. super init first if ( !Layer::init() ) { return false; } setTouchEnabled( true ); Size visibleSize = Director::getInstance()->getVisibleSize(); Point origin = Director::getInstance()->getVisibleOrigin(); ///////////////////////////// // 2. add a menu item with "X" image, which is clicked to quit the program // you may modify it. // add a "close" icon to exit the progress. it's an autorelease object auto closeItem = MenuItemImage::create( "CloseNormal.png", "CloseSelected.png", CC_CALLBACK_1(HelloWorld::menuCloseCallback, this)); closeItem->setPosition(Point(origin.x + visibleSize.width - closeItem->getContentSize().width/2 , origin.y + closeItem->getContentSize().height/2)); // create menu, it's an autorelease object auto menu = Menu::create(closeItem, NULL); menu->setPosition(Point::ZERO); this->addChild(menu, 1); ///////////////////////////// // 3. add your codes below... // add a label shows "Hello World" // create and initialize a label auto label = LabelTTF::create("Hello World", "Arial", 24); // position the label on the center of the screen label->setPosition(Point(origin.x + visibleSize.width/2, origin.y + visibleSize.height - label->getContentSize().height)); // add the label as a child to this layer this->addChild(label, 1); // add "HelloWorld" splash screen" auto sprite = Sprite::create("HelloWorld.png"); // position the sprite on the center of the screen sprite->setPosition(Point(visibleSize.width/2 + origin.x, visibleSize.height/2 + origin.y)); // add the sprite as a child to this layer //this->addChild(sprite, 0); initPhysics(); Point p(200,200); b2BodyDef bodyDef; bodyDef.type = b2_dynamicBody; bodyDef.position.Set(p.x/PTM_RATIO, p.y/PTM_RATIO); body = world->CreateBody(&bodyDef); // Define another box shape for our dynamic body. b2PolygonShape dynamicBox; dynamicBox.SetAsBox(.5f, .5f);//These are mid points for our 1m box // Define the dynamic body fixture. b2FixtureDef fixtureDef; fixtureDef.shape = &dynamicBox; fixtureDef.density = 1.0f; fixtureDef.friction = 0.3f; body->CreateFixture(&fixtureDef); scheduleUpdate(); //UILayer* pUiLayer = UILayer::create(); //addChild(pUiLayer); //Layout* pWidget = dynamic_cast<Layout*>(CCUIHELPER->createWidgetFromJsonFile("cocoStudio/DemoShop.ExportJson")); //pUiLayer->addWidget(pWidget); return true; } void HelloWorld::menuCloseCallback(Object* pSender) { Director::getInstance()->end(); #if (CC_TARGET_PLATFORM == CC_PLATFORM_IOS) exit(0); #endif } void HelloWorld::initPhysics() { b2Vec2 gravity; gravity.Set(0.0f, -10.0f); world = new b2World(gravity); // Do we want to let bodies sleep? world->SetAllowSleeping(true); world->SetContinuousPhysics(true); _debugDraw = new GLESDebugDraw( PTM_RATIO ); world->SetDebugDraw(_debugDraw); uint32 flags = 0; flags += b2Draw::e_shapeBit; flags += b2Draw::e_jointBit; flags += b2Draw::e_aabbBit; flags += b2Draw::e_pairBit; flags += b2Draw::e_centerOfMassBit; _debugDraw->SetFlags(flags); // Define the ground body. b2BodyDef groundBodyDef; groundBodyDef.position.Set(0, 0); // bottom-left corner // Call the body factory which allocates memory for the ground body // from a pool and creates the ground box shape (also from a pool). // The body is also added to the world. b2Body* groundBody = world->CreateBody(&groundBodyDef); // Define the ground box shape. b2EdgeShape groundBox; // bottom groundBox.Set(b2Vec2(VisibleRect::leftBottom().x/PTM_RATIO,VisibleRect::leftBottom().y/PTM_RATIO), b2Vec2(VisibleRect::rightBottom().x/PTM_RATIO,VisibleRect::rightBottom().y/PTM_RATIO)); groundBody->CreateFixture(&groundBox,0); // top groundBox.Set(b2Vec2(VisibleRect::leftTop().x/PTM_RATIO,VisibleRect::leftTop().y/PTM_RATIO), b2Vec2(VisibleRect::rightTop().x/PTM_RATIO,VisibleRect::rightTop().y/PTM_RATIO)); groundBody->CreateFixture(&groundBox,0); // left groundBox.Set(b2Vec2(VisibleRect::leftTop().x/PTM_RATIO,VisibleRect::leftTop().y/PTM_RATIO), b2Vec2(VisibleRect::leftBottom().x/PTM_RATIO,VisibleRect::leftBottom().y/PTM_RATIO)); groundBody->CreateFixture(&groundBox,0); // right groundBox.Set(b2Vec2(VisibleRect::rightBottom().x/PTM_RATIO,VisibleRect::rightBottom().y/PTM_RATIO), b2Vec2(VisibleRect::rightTop().x/PTM_RATIO,VisibleRect::rightTop().y/PTM_RATIO)); groundBody->CreateFixture(&groundBox,0); class TestListener : public b2ContactListener { virtual void BeginContact(b2Contact* contact) { //contact->GetFixtureA(); //contact->GetFixtureB(); } virtual void EndContact(b2Contact* contact) { //contact->GetFixtureA(); //contact->GetFixtureB(); } }; pListener = new TestListener(); //don't forget to delete it world->SetContactListener(pListener); //groundBody->SetTransform } void HelloWorld::draw() { // // IMPORTANT: // This is only for debug purposes // It is recommend to disable it // CCLayer::draw(); GL::enableVertexAttribs( cocos2d::GL::VERTEX_ATTRIB_FLAG_POSITION ); kmGLPushMatrix(); world->DrawDebugData(); kmGLPopMatrix(); } void HelloWorld::update(float dt) { //It is recommended that a fixed time step is used with Box2D for stability //of the simulation, however, we are using a variable time step here. //You need to make an informed choice, the following URL is useful //http://gafferongames.com/game-physics/fix-your-timestep/ int velocityIterations = 8; int positionIterations = 1; // Instruct the world to perform a single step of simulation. It is // generally best to keep the time step and iterations fixed. world->Step(dt, velocityIterations, positionIterations); } void HelloWorld::onTouchesEnded(const std::vector<Touch*>& touches, Event* event) { //Add a new body/atlas sprite at the touched location for (auto& touch : touches) { if(!touch) break; auto location = touch->getLocation(); body->SetTransform(b2Vec2(location.x/PTM_RATIO,location.y/PTM_RATIO),0); body->SetAwake(true);//防止静止之后就再也不动了 //addNewSpriteAtPosition( location ); } }