Cocos2d-x优化中纹理优化

标签：cocos2d   cocos2d-x   游戏   c++   开发人员   

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",
		CC_CALLBACK_1(HelloWorld::menuCloseCallback, this));


	closeItem->setPosition(Vec2(origin.x + visibleSize.width - closeItem->getContentSize().width/2 ,
		origin.y + closeItem->getContentSize().height/2));
	auto menu = Menu::create(closeItem, NULL);
	menu->setPosition(Vec2::ZERO);
	this->addChild(menu, 1);


	_labelLoading = Label::createWithTTF ("loading...", "fonts/Marker Felt.ttf", 35);
	_labelPercent = Label::createWithTTF ("0%%", "fonts/Marker Felt.ttf", 35);


	_labelLoading->setPosition(Vec2(visibleSize.width / 2, visibleSize.height / 2 - 20));
	_labelPercent->setPosition(Vec2(visibleSize.width / 2, visibleSize.height / 2 + 20));


	this->addChild(_labelLoading);
	this->addChild(_labelPercent);


	_numberOfLoadedSprites = 0;
	_imageOffset = 0;


	auto sharedFileUtils = FileUtils::getInstance();
	std::string fullPathForFilename 
				= sharedFileUtils->fullPathForFilename("ImageMetaData.plist");				①


	ValueVector vec = FileUtils::getInstance()->getValueVectorFromFile(fullPathForFilename);  	②
	_numberOfSprites = vec.size();											③
	//加载纹理
	for( auto& e : vec)  													④
	{ 
		auto row = e.asValueMap();
		auto filename = "icons/" + row.at("filename").asString();		
		Director::getInstance()->getTextureCache()->addImageAsync(filename,
				CC_CALLBACK_1(HelloWorld::loadingCallBack, this));					⑤
	}
	return true;
}


void HelloWorld::loadingCallBack(Texture2D *texture)								⑥
{
	++_numberOfLoadedSprites;
	__String* str = __String::createWithFormat("%d%%", 
						(int)(((float)_numberOfLoadedSprites / _numberOfSprites) * 100)); 		⑦
	_labelPercent->setString(str->getCString());									⑧


	Size visibleSize = Director::getInstance()->getVisibleSize();
	int i = ++_imageOffset * 60;


	auto sprite = Sprite::createWithTexture(texture);								⑨
	sprite->setAnchorPoint(Vec2(0,0));
	addChild(sprite, -1);
	sprite->setPosition(Vec2( i % (int)visibleSize.width, (i / (int)visibleSize.width) * 60));


	if (_numberOfLoadedSprites == _numberOfSprites)								⑩
	{
		_numberOfLoadedSprites = 0;
	}
}

<?xml version="1.0" encoding="utf-8"?>
<!DOCTYPE plist PUBLIC "-//Apple//DTD PLIST 1.0//EN" 
				"http://www.apple.com/DTDs/PropertyList-1.0.dtd">
<plist version="1.0">
  <array>
    <dict>
      <key>filename</key>
      <string>01-refresh.png</string>
    </dict>
    <dict>
      <key>filename</key>
      <string>02-redo.png</string>
    </dict>
    <dict>
      <key>filename</key>
      <string>03-loopback.png</string>
    </dict>
    <dict>
      <key>filename</key>
      <string>04-squiggle.png</string>
    </dict>
   … …  
  </array>
</plist>	

第⑨行代码auto sprite = Sprite::createWithTexture(texture)是通过纹理对象texture创建精灵对象。第⑩行代码if (_numberOfLoadedSprites == _numberOfSprites)是判断是否完成任务，_numberOfLoadedSprites是已经加装的图片数，_numberOfSprites是要加装的全部图片数。

Cocos2d-x优化中纹理优化

标签：cocos2d   cocos2d-x   游戏   c++   开发人员   

原文地址：http://blog.csdn.net/tonny_guan/article/details/41016241