chipmunk碰撞检测进阶篇源码

#include "HelloWorldScene.h" using namespace cocos2d; enum { //设定一个父节点的tag kTagParentNode = 1, }; enum { Z_PHYSICS_DEBUG = 100, }; HelloWorld::HelloWorld(){ } CCScene* HelloWorld::scene() { CCScene * scene = NULL; do { // 'scene' is an autorelease object scene = CCScene::create(); CC_BREAK_IF(! scene); // 'layer' is an autorelease object HelloWorld *layer = HelloWorld::create(); CC_BREAK_IF(! layer); // add layer as a child to scene scene->addChild(layer); } while (0); // return the scene return scene; } // on "init" you need to initialize your instance bool HelloWorld::init() { bool bRet = false; do { ////////////////////////////////////////////////////////////////////////// // super init first ////////////////////////////////////////////////////////////////////////// CC_BREAK_IF(! CCLayer::init()); ////////////////////////////////////////////////////////////////////////// // add your codes below... ////////////////////////////////////////////////////////////////////////// // 1. Add a menu item with "X" image, which is clicked to quit the program. // Create a "close" menu item with close icon, it's an auto release object. CCMenuItemImage *pCloseItem = CCMenuItemImage::create( "CloseNormal.png", "CloseSelected.png", this, menu_selector(HelloWorld::menuCloseCallback)); CC_BREAK_IF(! pCloseItem); // Place the menu item bottom-right conner. pCloseItem->setPosition(ccp(CCDirector::sharedDirector()->getWinSize().width - 20, 20)); // Create a menu with the "close" menu item, it's an auto release object. CCMenu* pMenu = CCMenu::create(pCloseItem, NULL); pMenu->setPosition(CCPointZero); CC_BREAK_IF(! pMenu); // Add the menu to HelloWorld layer as a child layer. this->addChild(pMenu, 1); // 2. Add a label shows "Hello World". // Create a label and initialize with string "Hello World". CCLabelTTF* pLabel = CCLabelTTF::create("Hello World", "Arial", 24); CC_BREAK_IF(! pLabel); // Get window size and place the label upper. CCSize size = CCDirector::sharedDirector()->getWinSize(); pLabel->setPosition(ccp(size.width / 2, size.height - 50)); // Add the label to HelloWorld layer as a child layer. this->addChild(pLabel, 1); // 3. Add add a splash screen, show the cocos2d splash image. CCSprite* pSprite = CCSprite::create("HelloWorld.png"); CC_BREAK_IF(! pSprite); // Place the sprite on the center of the screen pSprite->setPosition(ccp(size.width/2, size.height/2)); // Add the sprite to HelloWorld layer as a child layer. this->addChild(pSprite, 0); #if CC_ENABLE_CHIPMUNK_INTEGRATION // enable events setTouchEnabled(true); setAccelerometerEnabled(true); // title CCLabelTTF *label = CCLabelTTF::create("Multi touch the screen", "Arial", 36); label->setPosition(ccp( VisibleRect::center().x, VisibleRect::top().y - 30)); this->addChild(label, -1); // reset button // init physics 物理引擎初始化 initPhysics(); #if 1 // Use batch node. Faster CCSpriteBatchNode *parent = CCSpriteBatchNode::create("grossini_dance_atlas.png", 100); m_pSpriteTexture = parent->getTexture(); #else // doesn't use batch node. Slower m_pSpriteTexture = CCTextureCache::sharedTextureCache()->addImage("grossini_dance_atlas.png"); CCNode *parent = CCNode::create(); #endif //添加一个父节点 addChild(parent, 0, kTagParentNode); //初始化时添加一个精灵 addNewSpriteAtPosition(ccp(200,200)); spriteType=0; // menu for debug layer 设定物理引擎运行的模式用的菜单按钮 CCMenuItemFont::setFontSize(24); CCMenuItemFont *item = CCMenuItemFont::create("Toggle debug", this, menu_selector(HelloWorld::toggleDebugCallback)); CCMenu *menu = CCMenu::create(item, NULL); this->addChild(menu); menu->setPosition(ccp(VisibleRect::right().x-100, VisibleRect::top().y-60)); //调用计时器，此类计时器只认update方法，也就是层里定义的那个 scheduleUpdate(); #else CCLabelTTF *pLabel = CCLabelTTF::create("Should define CC_ENABLE_CHIPMUNK_INTEGRATION=1\n to run this test case", "Arial", 18); CCSize size = CCDirector::sharedDirector()->getWinSize(); pLabel->setPosition(ccp(size.width/2, size.height/2)); addChild(pLabel); #endif bRet = true; } while (0); return bRet; } //调试模式下可以看到为刚体定义的形状，否则形状会不可见 void HelloWorld::toggleDebugCallback(CCObject* pSender) { #if CC_ENABLE_CHIPMUNK_INTEGRATION m_pDebugLayer->setVisible(! m_pDebugLayer->isVisible()); #endif } HelloWorld::~HelloWorld() { // manually Free rogue shapes for( int i=0;i<4;i++) { cpShapeFree( m_pWalls[i] ); } cpSpaceFree( m_pSpace ); } void HelloWorld::initPhysics() { #if CC_ENABLE_CHIPMUNK_INTEGRATION // init chipmunk //cpInitChipmunk(); //创建一个物理空间 m_pSpace = cpSpaceNew(); //设定空间的重力点 m_pSpace->gravity = cpv(0, -100); // // rogue shapes // We have to free them manually //这里创建了四个形状用于创建一个矩形的墙体，其对应的刚体是静态刚体，也就是保持静止不动的刚体 //cpSegmentShapeNew用来建立一个段状形状，其它定义请看源码 // bottom m_pWalls[0] = cpSegmentShapeNew( m_pSpace->staticBody, cpv(VisibleRect::leftBottom().x,VisibleRect::leftBottom().y), cpv(VisibleRect::rightBottom().x, VisibleRect::rightBottom().y), 9.0f); // top m_pWalls[1] = cpSegmentShapeNew( m_pSpace->staticBody, cpv(VisibleRect::leftTop().x, VisibleRect::leftTop().y), cpv(VisibleRect::rightTop().x, VisibleRect::rightTop().y), 0.0f); // left m_pWalls[2] = cpSegmentShapeNew( m_pSpace->staticBody, cpv(VisibleRect::leftBottom().x,VisibleRect::leftBottom().y), cpv(VisibleRect::leftTop().x,VisibleRect::leftTop().y), 0.0f); // right m_pWalls[3] = cpSegmentShapeNew( m_pSpace->staticBody, cpv(VisibleRect::rightBottom().x, VisibleRect::rightBottom().y), cpv(VisibleRect::rightTop().x, VisibleRect::rightTop().y), 0.0f); //为形状设定弹性及摩擦系数并加入到物理空间 for( int i=0;i<4;i++) { m_pWalls[i]->e = 1.0f; m_pWalls[i]->u = 1.0f; cpSpaceAddStaticShape(m_pSpace, m_pWalls[i] ); } // Physics debug layer m_pDebugLayer = CCPhysicsDebugNode::create(m_pSpace); this->addChild(m_pDebugLayer, Z_PHYSICS_DEBUG); #endif } void HelloWorld::update(float delta) { // Should use a fixed size step based on the animation interval. int steps = 2; float dt = CCDirector::sharedDirector()->getAnimationInterval()/(float)steps; //为物理空间赋予时间，这里是按全局的动画间隔时间来设定的 for(int i=0; i<steps; i++){ cpSpaceStep(m_pSpace, dt); } } void HelloWorld::addNewSpriteAtPosition(CCPoint pos) { #if CC_ENABLE_CHIPMUNK_INTEGRATION int posx, posy; //获取节点 pParent = getChildByTag(kTagParentNode); //随机取重心位置坐标 posx = CCRANDOM_0_1() * 200.0f; posy = CCRANDOM_0_1() * 200.0f; posx = (posx % 4) * 85; posy = (posy % 3) * 121; //设定刚体形状，这里定义了四个矢量点，所以形状为矩形 int num = 4; cpVect verts[] = { cpv(-24,-54), cpv(-24, 54), cpv( 24, 54), cpv( 24,-54), }; //创建刚体 cpBody *body = cpBodyNew(1.0f, cpMomentForPoly(1.0f, num, ver