///////////////////////////////////////////////////////////////////////////
//
//		Realistic real-time rain simulation program
//
//		Pierre Rousseau
//
///////////////////////////////////////////////////////////////////////////



#include "CommonRain.h"
#include "RainFrameListener.h"



///////////////////////////////////////////////////////////////////////////
// global variables
///////////////////////////////////////////////////////////////////////////

float startPos[3]            = {700, HAUTEUR_OBSERVATEUR, 100 };

// variable to avoid going down through the ground
RaySceneQuery* raySceneQuery = 0;






/**
 ** Class : RainApp : the application's starting point
 ** provided here as an example.
 ** you should uncomment the #define statements in CommonRain.h if you wish to render streaks or snow or regular raindrops.
 */

class RainApp : public ExampleApplication
{

private :
    SceneNode *mViewNode, *mCameraNode;
    CloseDropsParticles *mSyst;

public:
    /** Basic constructor */
    RainApp()
    {}

    /** destructor */
    ~RainApp()
    {
        delete mSyst;
        delete raySceneQuery;
    }

protected:

    /** function creating the scene manager used in the application */
    virtual void chooseSceneManager(void)
    {
        mSceneMgr = mRoot->createSceneManager( ST_EXTERIOR_CLOSE );
    }

    /** function defining the contents of the scene, objects, and particles */
    void createScene(void)
    {
        // We set a skybox
        mSceneMgr->setSkyBox(true, "Examples/StormySkyBox");

        mSceneMgr->setWorldGeometry( "terrain.cfg" );

	// define a main node used to move the observer.
	// the main camera will be attached to a child node of this main node.
        mViewNode = mSceneMgr->getRootSceneNode()->createChildSceneNode("playerView");

        mViewNode->setPosition(startPos[0], startPos[1], startPos[2]); // the camera is positionned 1.8m above the ground (human height)

        mViewNode->yaw(Ogre::Radian(_PI), Ogre::Node::TS_LOCAL);
        mCameraNode = mViewNode->createChildSceneNode();
        mCameraNode->attachObject(mCamera);

        mCamera->setNearClipDistance( 1 );
        mCamera->setFarClipDistance( 10000 );
        mCamera->setFOVy(Ogre::Radian(FOVyCam));  // normal FOVy, 60°
        mCamera->setAspectRatio(4.0f/3.0f);
        mCamera->setLodBias(1);
        mCamera->setPosition(Vector3(0, 0, 0));

        // definition of the particle system
        mSyst = new CloseDropsParticles(mSceneMgr, mViewNode, mCameraNode);

        // collisions with the terrain
        raySceneQuery = mSceneMgr->createRayQuery(Ray(mCamera->getPosition(), Vector3::NEGATIVE_UNIT_Y));
        raySceneQuery->setQueryMask(0x80000000);
    }

    /** function to connect the application to its scene manager */
    void createFrameListener(void)
    {
        mFrameListener= new RainFrameListener(mWindow, mCamera, mViewNode, mCameraNode, mSyst);
        mRoot->addFrameListener(mFrameListener);
    }
};








#ifdef WIN32
#include <windows.h>
#endif

// ----------------------------------------------------------------------------
// Main function, just boots the application
// ----------------------------------------------------------------------------
#ifdef WIN32
INT WINAPI WinMain(HINSTANCE,HINSTANCE,LPSTR,INT)
#else
int main(int argc, char **argv)
#endif
{
    srand(time(NULL));
    // Create application object
    RainApp app;

    try
    {
        app.go();
    }
    catch( Exception& e )
    {
#ifdef WIN32
        MessageBox( NULL, e.getFullDescription().c_str(), "An exception has occured!",
                    MB_OK | MB_ICONERROR | MB_TASKMODAL);
#else

        fprintf(stderr, "An exception has occured : %s\n", e.getFullDescription().c_str());
#endif

    }
#ifndef WIN32
    return 0;
#endif
}