物理引擎一

来源：互联网发布：stc单片机pwm控制舵机编辑：程序博客网时间：2024/05/01 13:38
#include "HelloWorldScene.h"//物理引擎标识  int ball1Mask = 1 << 0;//球1  int ball2Mask = 1 << 1;//球2  int wallMask = 1 << 2;//地面Scene* HelloWorld::createScene(){    //创建有物理空间的场景      Scene* scene=Scene::createWithPhysics();      //设置Debug模式，你会看到物体的表面被线条包围，主要为了在调试中更容易地观察      scene->getPhysicsWorld()->setDebugDrawMask(PhysicsWorld::DEBUGDRAW_ALL);          // 'layer' is an autorelease object    auto layer = HelloWorld::create();    //把空间保持我们创建的层中，就是上面所说m_world的作用，方便后面设置空间的参数      //layer->setPhyWorld(scene->getPhysicsWorld());     // add layer as a child to scene    scene->addChild(layer);    // return the scene    return scene;}void HelloWorld::onEnter(){    Layer::onEnter();      //添加监听器      auto contactListener=EventListenerPhysicsContact::create();      //设置监听器的碰撞开始函数      contactListener->onContactBegin = CC_CALLBACK_1(HelloWorld::onContactBegin, this);      //添加到事件分发器中      _eventDispatcher->addEventListenerWithSceneGraphPriority(contactListener, this);  }bool HelloWorld::onContactBegin(const PhysicsContact& contact)  {      if ((contact.getShapeA()->getBody()->getCategoryBitmask() & ball1Mask) == ball1Mask) {          CCLOG("ball1 touch something");      }      if ((contact.getShapeB()->getBody()->getCategoryBitmask() & ball1Mask) == ball1Mask) {          CCLOG("ball1 touch something");      }      if ((contact.getShapeA()->getBody()->getCategoryBitmask() & ball2Mask) == ball2Mask) {          CCLOG("ball2 touch something");      }      if ((contact.getShapeB()->getBody()->getCategoryBitmask() & ball2Mask) == ball2Mask) {          CCLOG("ball2 touch something");      }      return true;  }  // on "init" you need to initialize your instancebool HelloWorld::init(){    //////////////////////////////    // 1. super init first    if ( !Layer::init() )    {        return false;    }    /*    auto animation = Animation::create();    for (int i = 1; i <8; i++)    {    char szName[100] = {0};    sprintf(szName, "bird_%d.png",i);    animation->addSpriteFrameWithFile(szName);    }    animation->setDelayPerUnit(0.08f);    animation->setRestoreOriginalFrame(true);    auto action = Animate::create(animation);    CCSprite* pBird = CCSprite::create("bird_1.png");    pBird->setPosition(ccp(480,320));    this->addChild(pBird);    pBird->runAction(CCRepeatForever::create(Sequence::create(action,action->reverse(),NULL)));    */        CCSprite* ballOne;    CCSprite* ballTwo;    Size visibleSize=Director::getInstance()->getVisibleSize();      Point origin=Director::getInstance()->getVisibleOrigin();      ballOne=Sprite::create();      ballOne->setContentSize(Size(50, 50));      ballOne->setPosition(visibleSize.width/2,visibleSize.height/2);      //创建物体，并且物体的形状为圆形，第一参数为半径，第二个参数为物体材质      //第三个参数为边的厚度,就是在Debug模式下看到的物体外面线条的厚度，默认为0      PhysicsBody* ballBodyOne=PhysicsBody::createCircle(ballOne->getContentSize().width/2,PHYSICSBODY_MATERIAL_DEFAULT, Vec2(1,1));      //      //ballBodyOne->setCategoryBitmask(1);          //是否设置物体为静态      //ballBody->setDynamic(false);      //设置物体的恢复力      ballBodyOne->getShape(0)->setRestitution(1.0f);      //设置物体的摩擦力      ballBodyOne->getShape(0)->setFriction(0.0f);      //设置物体密度      ballBodyOne->getShape(0)->setDensity(1.0f);      //设置质量      //ballBodyOne->getShape(0)->setMass(5000);      //设置物体是否受重力系数影响      ballBodyOne->setGravityEnable(false);      //设置物体的冲力      Vect force=Vect(500000.0f, 500000.0f);      ballBodyOne->applyImpulse(force);      //把物体添加到精灵中      ballOne->setPhysicsBody(ballBodyOne);      //设置标志      ballOne->setTag(1);      this->addChild(ballOne);      //设置第二个球      ballTwo=Sprite::create();      ballTwo->setContentSize(Size(100, 100));      ballTwo->setPosition(visibleSize.width/3,visibleSize.height/3);      PhysicsBody* ballBodyTwo=PhysicsBody::createCircle(ballOne->getContentSize().width/2,PHYSICSBODY_MATERIAL_DEFAULT);      //是否设置物体为静态      //ballBodyTwo->setDynamic(false);      ballBodyTwo->getShape(0)->setRestitution(1.0f);      ballBodyTwo->getShape(0)->setFriction(0.0f);      ballBodyTwo->getShape(0)->setDensity(1.0f);      ballBodyTwo->setGravityEnable(false);      force=Vect(-500000.0f, -500000.0f);      ballBodyTwo->applyImpulse(force);      ballTwo->setPhysicsBody(ballBodyTwo);      ballTwo->setTag(2);      this->addChild(ballTwo);      //创建一个盒子，用来碰撞      Sprite* edgeSpace=Sprite::create();      PhysicsBody* boundBody=PhysicsBody::createEdgeBox(visibleSize,PHYSICSBODY_MATERIAL_DEFAULT,3);      boundBody->getShape(0)->setFriction(0.0f);      boundBody->getShape(0)->setRestitution(1.0f);      edgeSpace->setPhysicsBody(boundBody);      edgeSpace->setPosition(Point(visibleSize.width/2,visibleSize.height/2));      this->addChild(edgeSpace);      edgeSpace->setTag(0);      ballBodyOne->setCategoryBitmask(ball1Mask);      ballBodyOne->setCollisionBitmask(wallMask|ball1Mask|ball2Mask);      ballBodyOne->setContactTestBitmask(wallMask|ball1Mask|ball2Mask);      ballBodyTwo->setCategoryBitmask(ball2Mask);      ballBodyTwo->setCollisionBitmask(wallMask|ball1Mask|ball2Mask);      ballBodyTwo->setContactTestBitmask(wallMask|ball1Mask|ball2Mask);      boundBody->setCategoryBitmask(wallMask);      boundBody->setCollisionBitmask(wallMask | ball1Mask|ball2Mask);      boundBody->setContactTestBitmask(wallMask|ball1Mask|ball2Mask);      return true;}void HelloWorld::menuCloseCallback(Ref* pSender){#if (CC_TARGET_PLATFORM == CC_PLATFORM_WP8) || (CC_TARGET_PLATFORM == CC_PLATFORM_WINRT)    MessageBox("You pressed the close button. Windows Store Apps do not implement a close button.","Alert");    return;#endif    Director::getInstance()->end();#if (CC_TARGET_PLATFORM == CC_PLATFORM_IOS)    exit(0);#endif}
0 0