cocos2dx 背景无限滚动

最新推荐文章于 2024-07-24 20:28:07 发布

原创最新推荐文章于 2024-07-24 20:28:07 发布 · 543 阅读

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CC 4.0 BY-SA版权

本文介绍了一个使用Cocos2d-x实现背景滚动效果的方法。通过创建两个精灵对象并利用定时器更新它们的位置来模拟连续的背景移动。文章详细展示了如何设置精灵的属性，如缩放和平移，以及如何通过调度器触发滚动更新。

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#include "BaseLayer.h"


BaseLayer::BaseLayer()
{
}

BaseLayer::~BaseLayer()
{
}
bool BaseLayer::init()
{
	bool bRes = false;

	do 
	{
		CC_BREAK_IF(!Layer::init());

		bRes = true;
	} while (0);

	return bRes;
}

void BaseLayer::SetBkGround( const char* bkImage )
{
	m_SpBk1 = Sprite::create(bkImage);
	m_SpBk1->setAnchorPoint(Vec2::ZERO);
	m_SpBk1->setScale(GetWinSize().width / m_SpBk1->getContentSize().width);
	m_SpBk1->setPosition(Vec2::ZERO);

	m_SpBk2 = Sprite::create(bkImage);
	m_SpBk2->setFlipX(true);
	m_SpBk2->setAnchorPoint(Vec2::ZERO);
	m_SpBk2->setScale(GetWinSize().width / m_SpBk1->getContentSize().width);
	m_SpBk2->setPosition(Vec2(GetWinSize().width, 0));

	this->addChild(m_SpBk1);
	this->addChild(m_SpBk2);

	this->schedule(schedule_selector(BaseLayer::ScrollBkGround), 1/60);
}

Size BaseLayer::GetWinSize()
{
	return Director::getInstance()->getWinSize();
}

void BaseLayer::ScrollBkGround(float dt)
{	
	if (m_SpBk1->getPositionX() <= -GetWinSize().width)
	{		
		m_SpBk1->setPosition(GetWinSize().width, 0);
	}
	if (m_SpBk2->getPositionX() <= -GetWinSize().width)
	{		
		m_SpBk2->setPosition(GetWinSize().width, 0);
	}

	m_SpBk1->setPosition(Vec2(m_SpBk1->getPositionX() - 1, 0));

	m_SpBk2->setPosition(Vec2(m_SpBk2->getPositionX() - 1, 0));
}

#ifndef __BASELAYER_H__
#define __BASELAYER_H__

#include "cocos2d.h"

USING_NS_CC;

class BaseLayer : public Layer
{
public:
	BaseLayer();
	~BaseLayer();

	virtual bool init() override;

	Size GetWinSize();

	void SetBkGround(const char* bkImage);
	void ScrollBkGround(float dt);


private:

	Sprite *m_SpBk1;
	Sprite *m_SpBk2;

};


#endif