source: trunk/VUT/work/TestCullingTerrain/TestCullingTerrainApplication.cpp @ 87

/**
    \file 
        TestCullingTerrainApplication.cpp
    \brief
        Tests the visibility culling algorithm
*/

#include <OgreNoMemoryMacros.h>
#include <CEGUI/CEGUI.h>
#include <../CEGUIRenderer/include/OgreCEGUIRenderer.h>
#include <../CEGUIRenderer/include/OgreCEGUIResourceProvider.h>
#include <../CEGUIRenderer/include/OgreCEGUITexture.h>
#include <OgreMemoryMacros.h>

#include "Ogre.h"
#include "TestCullingTerrainApplication.h"

#define WIN32_LEAN_AND_MEAN
#include "windows.h"


/*******************************************************/
/*     TestCullingTerrainApplication implementation    */
/*******************************************************/
TestCullingTerrainApplication::~TestCullingTerrainApplication()
{
        delete mTerrainContentGenerator;
}
//-----------------------------------------------------------------------
void TestCullingTerrainApplication::createCamera( void )
{
        // Create the camera
        mCamera = mSceneMgr->createCamera("PlayerCam");

        // Position it at 500 in Z direction
        mCamera->setPosition(Vector3(128,25,128));

        // Look back along -Z
    mCamera->lookAt(Vector3(0,0,-300));
    mCamera->setNearClipDistance(1);
    mCamera->setFarClipDistance(1000);
}
//-----------------------------------------------------------------------
void TestCullingTerrainApplication::createScene()
{
        // Set ambient light
        mSceneMgr->setAmbientLight(ColourValue(0.5, 0.5, 0.5));
        
        // Create a light
        Light* l = mSceneMgr->createLight("MainLight");
        // Accept default settings: point light, white diffuse, just set position
        // NB I could attach the light to a SceneNode if I wanted it to move automatically with
        //  other objects, but I don't
        l->setPosition(20,80,50);

        // --Fog
        // NB it's VERY important to set this before calling setWorldGeometry 
        // because the vertex program picked will be different
        ColourValue fadeColour(0.93, 0.86, 0.76);
        mWindow->getViewport(0)->setBackgroundColour(fadeColour);
        //mSceneMgr->setFog( FOG_LINEAR, fadeColour, .001, 500, 1000);

        // Create a skybox
    //mSceneMgr->setSkyBox(true, "Examples/SpaceSkyBox", 500, false);
        //mSceneMgr->setSkyDome( true, "Examples/CloudySky", 5, 8, 500, false );

        /*      // Define the required skyplane
        Plane plane;
        // 5000 world units from the camera
        plane.d = 5000;
        // Above the camera, facing down
        plane.normal = -Vector3::UNIT_Y;
        // Create the plane 10000 units wide, tile the texture 3 times
    mSceneMgr->setSkyPlane(true, plane, "Examples/SpaceSkyPlane",10000,3);*/

        std::string terrain_cfg("terrain.cfg");
#if OGRE_PLATFORM == OGRE_PLATFORM_APPLE
        terrain_cfg = mResourcePath + terrain_cfg;
#endif
        mSceneMgr->setWorldGeometry(terrain_cfg);
        // Infinite far plane?
        if (mRoot->getRenderSystem()->getCapabilities()->hasCapability(RSC_INFINITE_FAR_PLANE))
        {
                mCamera->setFarClipDistance(0);
        }

        // Set a nice viewpoint
        mCamera->setPosition(707, 2500, 528);
        mCamera->setOrientation(Quaternion(-0.3486, 0.0122, 0.9365, 0.0329));
        
        // CEGUI setup
        setupGui();
        // HACK: necessary to call once before the content creation for
        // terrain initialisation
        mSceneMgr->_renderScene(mCamera, mWindow->getViewport(0), true);

        mTerrainContentGenerator = new TerrainContentGenerator(mSceneMgr);
//      mTerrainContentGenerator->GenerateScene(500, "ninja.mesh");
        mTerrainContentGenerator->GenerateScene(1000, "robot.mesh");

        // no limitations needed anymore: the user can set 
        // objects also on peaks of terrain
        mTerrainContentGenerator->SetMaxHeight(5000); 
}
//-----------------------------------------------------------------------
void TestCullingTerrainApplication::setupGui()
{
         mGUIRenderer = new CEGUI::OgreCEGUIRenderer(mWindow, Ogre::RENDER_QUEUE_OVERLAY, 
                 false, 3000, ST_EXTERIOR_CLOSE);
     mGUISystem = new CEGUI::System(mGUIRenderer);

         // Mouse
     CEGUI::SchemeManager::getSingleton().loadScheme((CEGUI::utf8*)"TaharezLook.scheme");
     CEGUI::MouseCursor::getSingleton().setImage("TaharezLook", "MouseArrow");
         mGUISystem->setDefaultMouseCursor(
                (CEGUI::utf8*)"TaharezLook", (CEGUI::utf8*)"MouseArrow");

         CEGUI::MouseCursor::getSingleton().show();
}
//-----------------------------------------------------------------------
void TestCullingTerrainApplication::createFrameListener()
{
        mFrameListener= new MouseQueryListener(mWindow, mCamera, mSceneMgr, 
                mGUIRenderer, mTerrainContentGenerator);
        mFrameListener->showDebugOverlay(true);
        mRoot->addFrameListener(mFrameListener);
}
//-----------------------------------------------------------------------
void TestCullingTerrainApplication::chooseSceneManager()
{
        mSceneMgr = mRoot->getSceneManager(ST_EXTERIOR_CLOSE);
}
/***********************************************/
/*      MouseQueryListener implementation      */
/***********************************************/
//-----------------------------------------------------------------------
MouseQueryListener::MouseQueryListener(RenderWindow* win, Camera* cam, 
                                                                           SceneManager *sceneManager, 
                                                                           CEGUI::Renderer *renderer,
                                                                           TerrainContentGenerator *sceneGenerator): 
ExampleFrameListener(win, cam, false, true), 
mGUIRenderer(renderer), 
mShutdownRequested(false), 
mUseOptimization(false),
mLMouseDown(false),
mRMouseDown(false),
mSceneMgr(sceneManager),
mCurrentObject(NULL),
mTerrainContentGenerator(sceneGenerator),
mVisibilityThreshold(0),
mCurrentAlgorithm(GtpVisibility::VisibilityEnvironment::COHERENT_HIERARCHICAL_CULLING),
mShowOctree(true),
mUseCulling(false)
{
        // Reduce move speed
        mMoveSpeed = 50;
        mRotateSpeed *= 2;
    
        // Register this so that we get mouse events.
        mEventProcessor->addMouseListener(this);
        mEventProcessor->addMouseMotionListener(this);
        mEventProcessor->addKeyListener(this);

        mRayQueryExecutor = new RayQueryExecutor(mSceneMgr);
        
        // show overlay
        Overlay* pOver = OverlayManager::getSingleton().getByName("Example/VisibilityDemoOverlay"); 

        mAlgorithmInfo = OverlayManager::getSingleton().getOverlayElement("Example/Visibility/AlgorithmInfo");
        mThresholdInfo = OverlayManager::getSingleton().getOverlayElement("Example/Visibility/ThresholdInfo");
        
        mFrustumCulledNodesInfo = OverlayManager::getSingleton().getOverlayElement("Example/Visibility/FrustumCulledNodesInfo");
        mQueryCulledNodesInfo = OverlayManager::getSingleton().getOverlayElement("Example/Visibility/QueryCulledNodesInfo");
    mTraversedNodesInfo = OverlayManager::getSingleton().getOverlayElement("Example/Visibility/TraversedNodesInfo");
        mHierarchyNodesInfo = OverlayManager::getSingleton().getOverlayElement("Example/Visibility/HierarchyNodesInfo");
        mRenderedNodesInfo = OverlayManager::getSingleton().getOverlayElement("Example/Visibility/RenderedNodesInfo");
        mObjectsInfo = OverlayManager::getSingleton().getOverlayElement("Example/Visibility/ObjectsInfo");
        mUseOptimizationInfo = OverlayManager::getSingleton().getOverlayElement("Example/Visibility/UseOptimizationInfo");
        mQueriesIssuedInfo = OverlayManager::getSingleton().getOverlayElement("Example/Visibility/QueriesIssuedInfo");
        
        mAlgorithmInfo->setCaption(": " + mCurrentAlgorithmCaptions[mCurrentAlgorithm]);
        mThresholdInfo->setCaption(": 0");
        mFrustumCulledNodesInfo->setCaption(": 0");
        mQueryCulledNodesInfo->setCaption(": 0");
        mTraversedNodesInfo->setCaption(": 0");
        mHierarchyNodesInfo->setCaption(": 0");
        mRenderedNodesInfo->setCaption(": 0");
        mObjectsInfo->setCaption(": 0");
        mUseOptimizationInfo->setCaption(": true");
        mQueriesIssuedInfo->setCaption(": 0");

        setAlgorithm(mCurrentAlgorithm);
        toggleUseOptimization();
        toggleShowOctree();
        toggleUseCulling();

    pOver->show();
} 
//-----------------------------------------------------------------------
MouseQueryListener::~MouseQueryListener( )
{
        delete mRayQueryExecutor;
}
//-----------------------------------------------------------------------
void MouseQueryListener::mouseMoved (MouseEvent *e)
{
        // Update CEGUI with the mouse motion
    CEGUI::System::getSingleton().injectMouseMove(e->getRelX() * mGUIRenderer->getWidth(), 
                e->getRelY() * mGUIRenderer->getHeight());
}
//-----------------------------------------------------------------------
void MouseQueryListener::mousePressed(MouseEvent* e)
{
     // Left mouse button down
     if (e->getButtonID() & InputEvent::BUTTON0_MASK)
     {
                 CEGUI::MouseCursor::getSingleton().hide();

                 // Setup the ray scene query
         Ray mouseRay = mCamera->getCameraToViewportRay(e->getX(), e->getY());
   
                 Vector3 queryResult;
                 
                 // Get results, create a node/entity on the position
                 mCurrentObject = mTerrainContentGenerator->GenerateSceneObject(
                         mouseRay.getOrigin(), mouseRay.getDirection(), "robot.mesh");
                
         mLMouseDown = true; 
     }
     // Right mouse button down
     else if (e->getButtonID() & InputEvent::BUTTON1_MASK)
     {
         CEGUI::MouseCursor::getSingleton().hide();
         mRMouseDown = true;
     } // else if
} // mousePressed

 //-----------------------------------------------------------------------
void MouseQueryListener::mouseReleased(MouseEvent* e)
{
    // Left mouse button up
    if (e->getButtonID() & InputEvent::BUTTON0_MASK)
    {
                CEGUI::MouseCursor::getSingleton().show();
        mLMouseDown = false;
    }
    // Right mouse button up
    else if (e->getButtonID() & InputEvent::BUTTON1_MASK)
    {
        CEGUI::MouseCursor::getSingleton().show();
        mRMouseDown = false;
    }
} 
//-----------------------------------------------------------------------
void MouseQueryListener::mouseDragged(MouseEvent *e)
 {
         // If we are dragging the left mouse button.            
         if (mLMouseDown)
     {
                 Vector3 queryResult;
                 Ray mouseRay = mCamera->getCameraToViewportRay(e->getX(), e->getY());

                 if(mRayQueryExecutor->executeRayQuery(&queryResult, mouseRay))
                 {
                         if(mCurrentObject)
                                 mCurrentObject->setPosition(queryResult);
                 }
     }
         // If we are dragging the right mouse button.
         if (mRMouseDown)
         {
                 mCamera->yaw( -e->getRelX() * mRotateSpeed );
                 mCamera->pitch( -e->getRelY() * mRotateSpeed );
         }
}
//-----------------------------------------------------------------------
bool MouseQueryListener::frameStarted(const FrameEvent &evt)
{
        // clamp to terrain
        Vector3 camPos = mCamera->getPosition();
        Vector3 queryResult;

    if(mRayQueryExecutor->executeRayQuery(&queryResult, 
                Vector3(camPos.x, 5000.0f, camPos.z), Vector3::NEGATIVE_UNIT_Y))
        {
                mCamera->setPosition(mCamera->getPosition().x, queryResult.y + 10, 
                        mCamera->getPosition().z);
        }
        
        return ExampleFrameListener::frameStarted(evt);
}
//-----------------------------------------------------------------------
bool MouseQueryListener::frameEnded(const FrameEvent& evt)
{
        if (mShutdownRequested)
                return false;

    if (timeDelay >= 0) 
        timeDelay -= evt.timeSinceLastFrame;

    KEY_PRESSED(KC_SPACE, 0.3, nextAlgorithm());

        KEY_PRESSED(KC_SUBTRACT, 0, changeThreshold(-10));
        KEY_PRESSED(KC_ADD, 0, changeThreshold(10));
        KEY_PRESSED(KC_O, 0.3, toggleUseOptimization());
        KEY_PRESSED(KC_S, 0.3, toggleShowOctree());
        KEY_PRESSED(KC_C, 0.3, toggleUseCulling());
              
        updateStats();

    return ExampleFrameListener::frameStarted(evt) && ExampleFrameListener::frameEnded(evt);        
}
//-----------------------------------------------------------------------
void MouseQueryListener::changeThreshold(int incr)
{
        mVisibilityThreshold += incr; 
        if(mVisibilityThreshold < 0) mVisibilityThreshold = 0;
        
        char str[100]; sprintf(str,": %d", mVisibilityThreshold);

        mSceneMgr->setOption("Threshold", &mVisibilityThreshold); 
        mThresholdInfo->setCaption(str);
}
//-----------------------------------------------------------------------
void MouseQueryListener::nextAlgorithm()
{
        mCurrentAlgorithm = ++mCurrentAlgorithm % 
                GtpVisibility::VisibilityEnvironment::NUM_CULLING_MANAGERS,

        setAlgorithm(mCurrentAlgorithm);
}
//-----------------------------------------------------------------------
void MouseQueryListener::setAlgorithm(int algorithm)
{
        mAlgorithmInfo->setCaption(": " + mCurrentAlgorithmCaptions[mCurrentAlgorithm]);
        mSceneMgr->setOption("Algorithm", &mCurrentAlgorithm);
}
//-----------------------------------------------------------------------
void MouseQueryListener::updateStats()
{
        unsigned int opt = 0;
        char str[100];
        
        mSceneMgr->getOption("NumFrustumCulledNodes", &opt); sprintf(str,": %d", opt); 
        mFrustumCulledNodesInfo->setCaption(str);
        
        mSceneMgr->getOption("NumQueriesIssued", &opt); sprintf(str,": %d", opt); 
        mQueriesIssuedInfo->setCaption(str);
        
        mSceneMgr->getOption("NumQueryCulledNodes", &opt); sprintf(str,": %d", opt); 
        mQueryCulledNodesInfo->setCaption(str);
        
        mSceneMgr->getOption("NumTraversedNodes", &opt); sprintf(str,": %d", opt); 
        mTraversedNodesInfo->setCaption(str);

        mSceneMgr->getOption("NumHierarchyNodes", &opt); sprintf(str,": %d", opt); 
        mHierarchyNodesInfo->setCaption(str);

        mSceneMgr->getOption("NumRenderedNodes", &opt); sprintf(str,": %d", opt); 
        mRenderedNodesInfo->setCaption(str);

        sprintf(str,": %d", mTerrainContentGenerator->GetObjectCount()); 
        mObjectsInfo->setCaption(str);
}
//-----------------------------------------------------------------------
void MouseQueryListener::toggleUseOptimization()
{
        mUseOptimization = !mUseOptimization;

        mSceneMgr->setOption("UseOptimization", &mUseOptimization);

        if(mUseOptimization)
                mUseOptimizationInfo->setCaption(": true");
        else
                mUseOptimizationInfo->setCaption(": false");
}
//-----------------------------------------------------------------------
void MouseQueryListener::toggleShowOctree()
{
        mShowOctree = !mShowOctree;

        mSceneMgr->setOption("ShowOctree", &mShowOctree);
}
//-----------------------------------------------------------------------
void MouseQueryListener::toggleUseCulling()
{
        mUseCulling = !mUseCulling;

        mSceneMgr->setOption("UseCulling", &mUseCulling);
}
//-----------------------------------------------------------------------
void MouseQueryListener::keyPressed(KeyEvent* e)
{
        if(e->getKey() == KC_ESCAPE)
    {
                mShutdownRequested = true;
                e->consume();
                return;
        }

        CEGUI::System::getSingleton().injectKeyDown(e->getKey());
        CEGUI::System::getSingleton().injectChar(e->getKeyChar());
        e->consume();
}
//-----------------------------------------------------------------------
void MouseQueryListener::keyReleased(KeyEvent* e)
{
        CEGUI::System::getSingleton().injectKeyUp(e->getKey());
        e->consume();
}
//-----------------------------------------------------------------------
void MouseQueryListener::keyClicked(KeyEvent* e) 
{
        // Do nothing
        e->consume();
}
//-----------------------------------------------------------------------
INT WINAPI WinMain( HINSTANCE hInst, HINSTANCE, LPSTR strCmdLine, INT )
{
    // Create application object
    TestCullingTerrainApplication app;

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

    return 0;
}