void DataReaderHelper::addDataFromFile(const std::string& filePath) { //省略一些代码 DataInfo dataInfo; dataInfo.filename = filePathStr; dataInfo.asyncStruct = nullptr; dataInfo.baseFilePath = basefilePath; if (str == ".xml") { DataReaderHelper::addDataFromCache(contentStr, &dataInfo); } else if(str == ".json" || str == ".ExportJson") { DataReaderHelper::addDataFromJsonCache(contentStr, &dataInfo); } else if(isbinaryfilesrc) { DataReaderHelper::addDataFromBinaryCache(contentStr.c_str(),&dataInfo); } CC_SAFE_DELETE_ARRAY(pBytes); }
对应不同的文件(xml、json、二进制)解析方式，xml用到是addDataFromCache
void DataReaderHelper::addDataFromCache(const std::string& pFileContent, DataInfo *dataInfo) { tinyxml::XMLDocument document; document.Parse(pFileContent.c_str()); tinyxml::XMLElement *root = document.RootElement(); CCASSERT(root, "XML error or XML is empty."); root->QueryFloatAttribute(VERSION, &dataInfo->flashToolVersion); /* * Begin decode armature data from xml */ tinyxml::XMLElement *armaturesXML = root->FirstChildElement(ARMATURES); tinyxml::XMLElement *armatureXML = armaturesXML->FirstChildElement(ARMATURE); while(armatureXML) { ArmatureData *armatureData = DataReaderHelper::decodeArmature(armatureXML, dataInfo); if (dataInfo->asyncStruct) { _dataReaderHelper->_addDataMutex.lock(); } ArmatureDataManager::getInstance()->addArmatureData(armatureData->name.c_str(), armatureData, dataInfo->filename.c_str()); armatureData->release(); if (dataInfo->asyncStruct) { _dataReaderHelper->_addDataMutex.unlock(); } armatureXML = armatureXML->NextSiblingElement(ARMATURE); } /* * Begin decode animation data from xml */ tinyxml::XMLElement *animationsXML = root->FirstChildElement(ANIMATIONS); tinyxml::XMLElement *animationXML = animationsXML->FirstChildElement(ANIMATION); while(animationXML) { AnimationData *animationData = DataReaderHelper::decodeAnimation(animationXML, dataInfo); if (dataInfo->asyncStruct) { _dataReaderHelper->_addDataMutex.lock(); } ArmatureDataManager::getInstance()->addAnimationData(animationData->name.c_str(), animationData, dataInfo->filename.c_str()); animationData->release(); if (dataInfo->asyncStruct) { _dataReaderHelper->_addDataMutex.unlock(); } animationXML = animationXML->NextSiblingElement(ANIMATION); } /* * Begin decode texture data from xml */ tinyxml::XMLElement *texturesXML = root->FirstChildElement(TEXTURE_ATLAS); tinyxml::XMLElement *textureXML = texturesXML->FirstChildElement(SUB_TEXTURE); while(textureXML) { TextureData *textureData = DataReaderHelper::decodeTexture(textureXML, dataInfo); if (dataInfo->asyncStruct) { _dataReaderHelper->_addDataMutex.lock(); } ArmatureDataManager::getInstance()->addTextureData(textureData->name.c_str(), textureData, dataInfo->filename.c_str()); textureData->release(); if (dataInfo->asyncStruct) { _dataReaderHelper->_addDataMutex.unlock(); } textureXML = textureXML->NextSiblingElement(SUB_TEXTURE); } }
里面有三个while，分别decodeArmature、decodeAnimation、decodeTexture，生成ArmatureData、AnimationData、TextureData之后又ArmatureDataManager::getInstance()->addArmatureData、addAnimationData、addTextureData，加到ArmatureDataManager对应map里。decodeXXX里又会调用各种decodeXX来生成相应的XXXData。
Armature
在载入了xml数据后，调用
armature = Armature::create("Dragon"); armature->getAnimation()->play("walk"); armature->getAnimation()->setSpeedScale(); armature->setPosition(VisibleRect::center().x, VisibleRect::center().y * .f); armature->setScale(.f); addChild(armature);
便展示了动画，那么这是如何做到的呢？
Armature部分代码如下，ArmatureAnimation控制xml的mov节点，Bone中有Tween，这个Tween对应xml中b(MovementBoneData)
class Armature: public cocosd::Node, public cocosd::BlendProtocol { protected: //要展示动画的ArmatureData ArmatureData *_armatureData; BatchNode *_batchNode; Bone *_parentBone; float _version; mutable bool _armatureTransformDirty; //所有Bone cocosd::Map<std::string, Bone*> _boneDic; cocosd::Vector<Bone*> _topBoneList; cocosd::BlendFunc _blendFunc; cocosd::Vec _offsetPoint; cocosd::Vec _realAnchorPointInPoints; //动画控制器 ArmatureAnimation *_animation; };
Bone
部分代码如下，tweenData为当前Bone的状态，每帧都会更新这个值，并用tweenData确定worldInfo，提供Skin显示信息。tween为骨头的整个动画过程。