cocos2dx3.0 tiger机简单实例

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吐槽下csdn,我打老。。虎。。机,我的账号会被封。。难怪我之前要做这个动画的时候,找不到一个好点的参考资料!

原理:

1: 靠ScrollView遮挡,是其在有限的区域运动!

2: 在update中更新每个精灵的位置,这些位置用物理的基础知识做运算!(当位置小于某个值时,将其弄到最上面!)

3: 让精灵停在制定位置,则是当加速到一定程度,然后设定指定圈数,然后停下!


先看头文件的参数和函数

	int m_cardsReturnResult;
	float m_cardsDistance;
	bool  m_bUpdate1Flag;

	//四個精灵的编号
	vector<int> m_vec_allCards;
	//每一列的纵坐标
	float m_cardPosY[CardsSum];
	//每一列的横坐标
	float m_cardPosX[LowsSum];
	//三列的所有精灵
	CCSprite* m_sCards[LowsSum][CardsSum];
	//每一列加速减速匀速的时间
	float m_sCardsChangeTimes[LowsSum][AddDelSpeedSum];
	//初速度
	float m_cardsV0[LowsSum];
	//时间
	float m_cardsTime[LowsSum];
	//是否update
	bool m_cardsIsUpdate[LowsSum];
	//是否在最后位置停下
	bool m_cardsIsUpdateEndPos[LowsSum];
	//最后的一个数
	vector<int> m_cardsEndNum;
	//卡片到结束要转的圈数
	int m_cardsEndRool[LowsSum];

	//定时器刷新位置
	void update(float dt);
	void fun_cardsAction(int _lowNum,float dt);
	bool fun_cardsMove(int _lowNum,float dt,int isFinish = -1);

	//通过m_cardsReturnResult,得到返回最后结果的容器
	vector<int> getEndNum();
	int getRandCardDifByOther(int _cardColor);
	vector<int> getEndAllDifNum(int count = 3);

cpp的核心代码

1: 靠ScrollView遮挡,是其在有限的区域运动!

	Node* node_container = Node::create(); 
	ScrollView* scrollView = ScrollView::create();
	if (scrollView && node_container)
	{
		scrollView->setContainer(node_container);
		scrollView->setViewSize(Size(500,250));
		scrollView->setContentSize(Size(500,500));
		scrollView->setTouchEnabled(false);
		this->addChild(scrollView);
		scrollView->setPosition(Vec2(size.width / 2 - 500 / 2,size.height / 2 - 250 / 2));
	}

	m_cardsDistance = 115;
	m_cardPosY[0] = -120 + m_cardsDistance * 0;
	m_cardPosY[1] = -120 + m_cardsDistance * 1;
	m_cardPosY[2] = -120 + m_cardsDistance * 2;
	m_cardPosY[3] = -120 + m_cardsDistance * 3;

	m_cardPosX[0] = scrollView->getContentSize().width * 1 / 6;
	m_cardPosX[1] = scrollView->getContentSize().width * 1 / 2;
	m_cardPosX[2] = scrollView->getContentSize().width * 5 / 6;

	const char* szName[] = { "1.png","2.png","3.png","4.png" };
	for (int i = 0; i < LowsSum; i++)
	{
		for (int j = 0; j < CardsSum; j++)
		{
			m_sCards[i][j] = Sprite::create(szName[j]);
			if (m_sCards[i][j])
			{
				m_sCards[i][j]->setPosition(ccp(m_cardPosX[i],m_cardPosY[j]));
				node_container->addChild(m_sCards[i][j]);
			}
		}
	}

2: 在update中更新每个精灵的位置,这些位置用物理的基础知识做运算!(当位置小于某个值时,将其弄到最上面!)
精灵加速部分(匀速和减速相同的道理): @H_404_26@ float k = 1000.0f; float v0 = m_cardsV0[_lowNum]; m_cardsTime[_lowNum] += dt; m_cardsV0[_lowNum] = v0 + k*dt; float moveSum = (v0 + m_cardsV0[_lowNum])*dt / 2; fun_cardsMove(_lowNum,moveSum);其中fun_cardsMove函数
bool GameLayer::fun_cardsMove(int _lowNum,float _moveSum,int isFinish /*= -1*/)
{
	for (int i = 0; i < CardsSum; i++)
	{
		Sprite* sp = m_sCards[_lowNum][i];
		if (sp)
		{
			float flagPosY = sp->getPositionY() - _moveSum;
			if (flagPosY < -50)
			{
				flagPosY = flagPosY + m_cardsDistance * 4;

				//转的圈数减一
				if (isFinish == 2 && i == m_cardsEndNum[_lowNum])
				{
					m_cardsEndRool[_lowNum] = m_cardsEndRool[_lowNum] - 1;
				}
			}
			
			sp->setPositionY(flagPosY);
		}
	}
	return false;
}
3: 让精灵停在制定位置,则是当加速到一定程度,然后设定指定圈数(上面代码中的m_cardsEndRool[_lowNum]),然后停下!
匀减速部分,做了很多非常规处理
		int _endPos = m_cardsEndNum[_lowNum];
		Sprite* sp2 = m_sCards[_lowNum][_endPos];

		if (m_cardsEndRool[_lowNum] == 0)
		{
			if (sp2->getPositionY() >= m_cardPosY[2])
			{
				float dis = sp2->getPositionY() - m_cardPosY[2];
				if (fabsf(dis) < 1)
				{
					m_cardsIsUpdateEndPos[_lowNum] = true;
					//show result
					if (m_cardsIsUpdateEndPos[0] && m_cardsIsUpdateEndPos[1] && m_cardsIsUpdateEndPos[2])
					{
						this->unschedule(schedule_selector(GameLayer::update));
					}

					return;
				}

				float k = m_cardsV0[_lowNum] * m_cardsV0[_lowNum] / (2 * dis);

				float v0 = m_cardsV0[_lowNum];
				m_cardsTime[_lowNum] += dt;
				m_cardsV0[_lowNum] = v0 - k * dt;

				//不正常情况下
				if (v0 <= 0)
				{
					float moveSum = sp2->getPositionY() - m_cardPosY[2];
					fun_cardsMove(_lowNum,moveSum);
					CCLOG("v0 no normal_1: %d,m_cardsV0: %lf,moveSum: %lf,a: %lf,dis: %lf",_lowNum,m_cardsV0[_lowNum],moveSum,k,dis);
					return;
				}
				//正常情况下
				float moveSum = (v0 + m_cardsV0[_lowNum]) * dt / 2;
				fun_cardsMove(_lowNum,moveSum);
			}
			else
			{
				//不正常情况下
				float dis = m_cardsDistance * 4 - m_cardPosY[2] + sp2->getPositionY();//;
				float k = m_cardsV0[_lowNum] * m_cardsV0[_lowNum] / (2 * dis);

				float v0 = m_cardsV0[_lowNum];
				m_cardsTime[_lowNum] += dt;
				m_cardsV0[_lowNum] = v0 - k * dt;
				float moveSum = (v0 + m_cardsV0[_lowNum]) * dt / 2;

				fun_cardsMove(_lowNum,moveSum);

				CCLOG("v0 no normal_2: %d,dis);
			}

			return;
		}
一些效果图:




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