sceneloading.cpp

五行MMORPG引擎系统V1.0

/*//////////////////////////////////////////////////////
	场景读取控制
	参照sceneLighting的做法
		先通过exec把mis文件生成需要的对象数据
		然后遍历datagroup调用preload(client)读取Client数据
		其中,要使用simEvent,以便能更新进度提示
		进度以datablock数量提示

		场景读取开始,需要指定场景读取完毕后的脚本回调

		李亦 [e-mail]  qq:4040719
		2006.6.1
/*//////////////////////////////////////////////////////
#include "sceneGraph/sceneLoading.h"
#include "game/gameConnection.h"
#include "sceneGraph/sceneGraph.h"
#include "core/fileStream.h"
#include "console/consoleTypes.h"
#include "gui/core/guiCanvas.h"
#include "core/zipSubStream.h"


bool	SceneLoading::s_bTerminateLoading	= false;
StringTableEntry SceneLoading::s_pScriptCallback		= 0;
F32	SceneLoading::s_fLoadingProgress		= 0.f;

SceneLoading*	g_pSceneLoading = 0;



//------------------------------------------------------------------------------
class SceneLoadingProcessEvent : public SimEvent
{
   private:
      U32      m_uLoadingIndex;

   public:
      SceneLoadingProcessEvent(U32 loadingIndex)
      {
         m_uLoadingIndex = loadingIndex;        // size(): end of loading
      }

      void process(SimObject * object)
      {
         AssertFatal(object, "SceneLoadingProcessEvent:: null event object!");
         if(object)
            static_cast<SceneLoading*>(object)->processEvent(m_uLoadingIndex);
      };
};

//-------------------------------------------------------------
//-------------------------------------------------------------
SceneLoading::SceneLoading(void)
{
   static bool sbInitialized = false;
   if(!sbInitialized)
   {
      Con::addVariable("SceneLoading::terminate", TypeBool, &s_bTerminateLoading);
      Con::addVariable("SceneLoading::Progress",	TypeF32, &s_fLoadingProgress);
      sbInitialized = true;
   }
}

SceneLoading::~SceneLoading(void)
{
}

//-------------------------------------------------------------
bool SceneLoading::loadScenes(void)
{
   m_nStartTime = Platform::getRealMilliseconds();
	SimGroup* pGroup = Sim::getDataBlockGroup();
   AssertFatal(pGroup, "SceneLoading:: 有没搞错,getDataBlockGroup居然为NULL");
	
	m_uLoadingNum	= pGroup->size();
	m_uLoadingIndex= 0;
	//for(SimGroupIterator itr=pGroup->begin();;)
	//{
	//}
   // get things started
   Sim::postEvent(this, new SceneLoadingProcessEvent(0), Sim::getTargetTime() + 1);
   return(true);

}
//------------------------------------------------------------------------------
void SceneLoading::processEvent(U32 loadingIndex)
{
	//处理中断了
	if(s_bTerminateLoading)
	{
      completed(false);
      deleteObject();
      g_pSceneLoading = 0;
		return;
	}

	s_fLoadingProgress	= (float)(loadingIndex+1) / (float)m_uLoadingNum;
	m_uLoadingIndex		= loadingIndex;

	//处理完毕
	if(loadingIndex >= m_uLoadingNum)
	{
      completed(true);
      deleteObject();
      g_pSceneLoading = 0;
		return;
	}

	SimGroup* pGroup = Sim::getDataBlockGroup();
	SimDataBlock* pDataBlock = static_cast<SimDataBlock*>((*pGroup)[loadingIndex]);
	if(pDataBlock)
	{
		static char errorBuffer[256];
		if(!pDataBlock->preload(false,errorBuffer))
		{
			Con::errorf(ConsoleLogEntry::General, "%s: preload failed for %s.", errorBuffer);
		}
	}//if

	Sim::postEvent(this, new SceneLoadingProcessEvent(loadingIndex+1), Sim::getTargetTime() + 1);

}


void SceneLoading::completed(bool success)
{
	success;
   if(s_pScriptCallback && s_pScriptCallback[0])
      Con::executef(1, s_pScriptCallback);
}

//-------------------------------------------------------------
bool SceneLoading::isLoading()
{
	return (bool(g_pSceneLoading));
}

bool SceneLoading::beginSceneLoading(StringTableEntry pScriptCallback)
{
   if(g_pSceneLoading)
   {
      Con::errorf(ConsoleLogEntry::General, "强制重读场景数据...");
      g_pSceneLoading->deleteObject();
      g_pSceneLoading = 0;
   }

   SceneLoading * pLoading = new SceneLoading;

   // register the object
   if(!pLoading->registerObject())
   {
      AssertFatal(0, "SceneLoading:: 无法注册sceneLoading对象!");
      Con::errorf(ConsoleLogEntry::General, "SceneLoading:: 无法注册sceneLoading对象!");
      delete pLoading;
      return(false);
   }

   // could have interior resources but no instances (hey, got this far didnt we...)
   GameConnection * con = dynamic_cast<GameConnection*>(NetConnection::getConnectionToServer());
   if(!con)
   {
      Con::errorf(ConsoleLogEntry::General, "SceneLoading:: no GameConnection");
      return(false);
   }
   con->addObject(pLoading);

   // 设置全局属性
   g_pSceneLoading		= pLoading;
   s_bTerminateLoading	= false;
   s_fLoadingProgress	= 0.f;
   s_pScriptCallback		= pScriptCallback;


   if(!pLoading->loadScenes())
   {
      pLoading->completed(true);
      pLoading->deleteObject();
      g_pSceneLoading = 0;
      return(false);
   }
   return(true);
}

ConsoleFunction(beginSceneLoading,bool,1,2,"beginSceneLoading(char* pScriptCallback=\"onSceneLoadingCompleted\");")
{
   StringTableEntry pCallback;
	if(argc < 2)
		pCallback = StringTable->insert("sceneLoadingCompleted");
	else
		pCallback = StringTable->insert(argv[1]);

   return(SceneLoading::beginSceneLoading(pCallback));
}