void LevelFifteen::callbackC(Node* sender) { auto visibleSize = Director::getInstance()->getVisibleSize(); auto pictureName = 1 + rand() % 27; auto str = String::createWithFormat("%d.png", pictureName)->getCString(); auto ballTwo2 = Sprite::createWithSpriteFrameName(str); ballTwo2->setPosition(Vec2(visibleSize.width / 2.0f, visibleSize.height - 90)); PhysicsBody* ballBodyTwo = nullptr; if (pictureName <= 9) { ballBodyTwo = PhysicsBody::createBox(ballTwo2->getContentSize(), PHYSICSBODY_MATERIAL_DEFAULT); } else if (pictureName > 9 && pictureName <= 18) { ballBodyTwo = PhysicsBody::createCircle(ballTwo2->getContentSize().width / 2.0f, PHYSICSBODY_MATERIAL_DEFAULT); } else if (pictureName > 18 && pictureName <= 21) { Vec2 vec[] = { Vec2(-22.50000, 22.00000), Vec2(24.00000, 10.00000), Vec2(-10.00000, -24.00000) }; ballBodyTwo = PhysicsBody::createPolygon(vec, 3); } else if (pictureName > 21 && pictureName <= 24) { Vec2 vec[] = { Vec2(-15.50000, 15.00000), Vec2(15.50000, 6.00000), Vec2(-7.00000, -15.50000) }; ballBodyTwo = PhysicsBody::createPolygon(vec, 3); } else if (pictureName > 24 && pictureName <= 27) { Vec2 vec[] = { Vec2(-8.00000, 8.00000), Vec2(7.50000, 3.00000), Vec2(-4.00000, -7.50000) }; ballBodyTwo = PhysicsBody::createPolygon(vec, 3); } //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); ballBodyTwo->setCategoryBitmask(2);// 分类掩码 ballBodyTwo->setCollisionBitmask(1 | 2 | 4 | 8);// 碰撞掩码 ballBodyTwo->setContactTestBitmask(1 | 8);// 接触测试掩码 ballBodyTwo->addMass(1000.0f); int flag = CCRANDOM_0_1() * 2; auto num = 0; switch (flag) { case 0: num = -1; break; case 1: num = 1; break; default: break; } auto force1 = Vec2(CCRANDOM_0_1()*10000.0f*num, -300000.0f); ballBodyTwo->applyImpulse(force1); ballTwo2->setPhysicsBody(ballBodyTwo); this->addChild(ballTwo2); }