cocos2dx 背景无限滚动

#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

（编辑：李大同）

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