cocos2dx实现橡皮擦效果以及判断是否擦除完毕实现橡皮擦效果以及判断是否擦除完毕
本文实例为大家分享了cocos2dx实现橡皮擦效果，以及判断是否擦除完毕，供大家参考，具体内容如下
首先修改HelloWorld.h文件
#ifndef __HELLOWORLD_SCENE_H__
#define __HELLOWORLD_SCENE_H__
#include "cocos2d.h"
#include "cocos-ext.h"
USING_NS_CC_EXT;
USING_NS_CC;
class HelloWorld : public cocos2d::Layer
{
public:
// there's no 'id' in cpp, so we recommend returning the class instance pointer
static cocos2d::Scene* createScene();
// Here's a difference. Method 'init' in cocos2d-x returns bool, instead of returning 'id' in cocos2d-iphone
virtual bool init();
// a selector callback
void menuCloseCallback(cocos2d::Ref* pSender);
// implement the "static create()" method manually
CREATE_FUNC(HelloWorld);
void myUpdate(float dt);//不断判断是否全部擦除
void onTouchesMoved(const std::vector<Touch*>& touches, Event* event);
bool myIsDataClear(RenderTexture *pRenderTexture);//是否完全擦除
bool myIsDataClearInRect(RenderTexture *pRenderTexture,int x,int y,int width ,int height);//某个区域是否完全擦除
Sprite *sprFore;
RenderTexture *renderTexture;
Vector<Sprite*> _brushs;
};
#endif // __HELLOWORLD_SCENE_H__
然后修改HelloWorld.cpp文件
#include "HelloWorldScene.h"
USING_NS_CC;
Scene* HelloWorld::createScene()
{
// 'scene' is an autorelease object
auto scene = Scene::create();
// 'layer' is an autorelease object
auto layer = HelloWorld::create();
// add layer as a child to scene
scene->addChild(layer);
// return the scene
return scene;
}
// on "init" you need to initialize your instance
bool HelloWorld::init()
{
if ( !Layer::init() )
{
return false;
}
Size visibleSize = Director::getInstance()->getVisibleSize();
Vec2 origin = Director::getInstance()->getVisibleOrigin();
auto closeItem = MenuItemImage::create(
"CloseNormal.png",
"CloseSelected.png",
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