Game Programming in C++ - Start to Finish/GameProgrammingS.iso/Peon/PeonSDK-Win32-1.0.0.exe/{app}/PeonMain/source/EngineCore.cpp

C/C++ Source or Header | 2005-11-30 | 5KB | 258 lines

#include "FileLogger.h"
#include "IniConfigReader.h"
#include "SceneRenderer.h"
#include "IApplication.h"

#include "EngineCore.h"

namespace peon
{
    //-----------------------------------------------------------------------
    template<> EngineCore* ISingleton<EngineCore>::ms_Singleton = 0;

    EngineCore* EngineCore::getSingletonPtr(void)
    {
        return ms_Singleton;
    }

    EngineCore& EngineCore::getSingleton(void)
    {

        assert( ms_Singleton );

        return ( *ms_Singleton );
    }

    EngineCore::EngineCore()
    {
        m_pApplication = NULL;
        m_pConfig      = NULL;
        m_pVideoDevice   = NULL;
        m_fps           = 0.0f;
    }

    EngineCore::~EngineCore()
    {
    }

    bool EngineCore::loadEngine(const String& strWindowTitle, const String& strIniConfig )
    {

#if defined( WIN32 )

#if defined(DEBUG) | defined(_DEBUG)
        _CrtSetDbgFlag( _CRTDBG_ALLOC_MEM_DF | _CRTDBG_LEAK_CHECK_DF );
#endif

#endif


        new FileLogger( PEON_LOG_DEBUG );

        if(!FileLogger::getSingleton().openLogStream("PeonMain.log"))
        {
            OutputDebugString("failed to open file\n");
            unloadEngine();
            return false;
        }

        //start up SDL
        if(SDL_Init( SDL_INIT_EVERYTHING ) < 0)
        {
            FileLogger::getSingleton().logFatal("EngineCore", "Failed to load SDL. Exiting");
            unloadEngine();
            return false;
        }

        m_pConfig = new IniConfigReader( strIniConfig );
        if(NULL == m_pConfig)
        {
            FileLogger::getSingleton().logFatal("EngineCore", "Failed to load INI file. Exiting");
            unloadEngine();
            return false;
        }


        m_pVideoDevice = new SceneRenderer();
        if(!m_pVideoDevice->loadDevice( m_pConfig ))
        {
            FileLogger::getSingleton().logFatal("EngineCore", "Failed to load graphics renderer. Exiting");
            unloadEngine();
            return false;
        }


        SDL_WM_SetCaption(strWindowTitle.c_str(), strWindowTitle.c_str());

        //Initialize the AudioEngine instance
        new AudioEngine();
        if(!AudioEngine::getSingleton().loadEngine( m_pConfig ))
        {
            FileLogger::getSingleton().logInfo("EngineCore", "Failed to initialize sound device. Disabling audio support");
        }

        new InputEngine();
        if(!InputEngine::getSingleton().loadEngine( m_pConfig ))
        {

            FileLogger::getSingleton().logFatal("EngineCore", "Failed to initialize input device(s). Exiting");
            unloadEngine();
            return false;

        }





        return true;
    }

    void EngineCore::unloadEngine()
    {
        FileLogger::getSingleton().logDebug("EngineCore", "Shutting down Peon");

        if( m_pApplication )
        {
            m_pApplication->onUnloadWorld();
            m_pApplication->unloadStates();
            //m_pApplication->getSingleton().onUnloadWorld();
            //m_pApplication->getSingleton().unloadStates();

            //delete IApplication::getSingletonPtr();
            PEON_DELETE( m_pApplication );
        }




        //cleanup the AudioEngine instance
        delete AudioEngine::getSingletonPtr();

        delete InputEngine::getSingletonPtr();

        PEON_DELETE( m_pVideoDevice );

        PEON_DELETE( m_pConfig );

        SDL_Quit();

        delete FileLogger::getSingletonPtr();

    }

    int EngineCore::runEngine()
    {
        m_oTimer.start();

        bool done = false;
        SDL_Event event;

        while(! done)
        {
            while( SDL_PollEvent(&event) )
            {
                switch ( event.type )
                {

                    case SDL_KEYDOWN:
                    case SDL_KEYUP:
                        //first test for the ESCAPE key
                        if(event.key.keysym.sym == SDLK_ESCAPE)
                        {
                            //quit the app
                            done = true;
                            break;
                        }

                        if(m_pApplication)
                            m_pApplication->onKeyEvent(&event.key);
                    break;

                    case SDL_MOUSEMOTION:
                    case SDL_MOUSEBUTTONDOWN:
                        if(m_pApplication)
                            m_pApplication->onMouseEvent( &event );
                    break;



                case SDL_QUIT :
                    done = true;
                    break;

                default:
                    break;
                }
            }

            float elapsed_time = m_oTimer.getElapsedTime();

            if(m_pApplication)
            {
                m_pApplication->onUpdateWorld( elapsed_time );

            }

            if(m_pVideoDevice->clearDevice())
            {

                if(m_pApplication)
                {
                    m_pApplication->onRenderWorld();

                }


                m_pVideoDevice->flipDevice();

                updateFPS();


            }

        }

        unloadEngine();

        return 0;
    }

    bool EngineCore::setApplication( IApplication* pApp )
    {
        if( NULL == pApp )
            return false;

        if(!pApp->onLoadWorld())
        {
            FileLogger::getSingleton().logError("EngineCore", "Error on IApplication::onLoad()");

            return false;
        }

        m_pApplication = pApp;

        return true;
    }

    void EngineCore::updateFPS()
    {
        static float fLastTime = 0.0f;
        static DWORD dwFrames  = 0L;
        float fTime = m_oTimer.getAbsoluteTime();

        ++dwFrames;

        // Update the scene stats once per second
        if( fTime - fLastTime > 1.0f )
        {
            m_fps    = dwFrames / (fTime - fLastTime);
            fLastTime = fTime;
            dwFrames  = 0L;
        }

    }
}