source: GTP/trunk/App/Demos/Vis/HillyTerrain/OGRE/TestCullingTerrainApplication.cpp @ 679

#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 "OgreReferenceAppLayer.h"
//#include "OgreRefAppWorld.h"
#include "TestCullingTerrainApplication.h"
#include "TerrainFrameListener.h"

#define WIN32_LEAN_AND_MEAN
#include <windows.h>


/**********************************************/
/*             EntityState implementation     */
/**********************************************/


Vector3 EntityState::msMinPos = Vector3::ZERO;
Vector3 EntityState::msMaxPos = Vector3::ZERO;

EntityState::EntityState(Entity *ent, State entityState, Real speed):
mEntity(ent), mState(entityState), mAnimationSpeed(speed)
{
        switch(entityState)
        {
        case MOVING:
                mAnimationState = mEntity->getAnimationState("Walk");
                break;
        case WAITING:
                mAnimationState = mEntity->getAnimationState("Idle");
                break;
        case STOP:
                mAnimationState = NULL;
                break;
        default:
                break;
        }
        // enable animation state
        if (mAnimationState)
        {
                mAnimationState->setLoop(true);
                mAnimationState->setEnabled(true);
        }
        mTimeElapsed = Math::RangeRandom(1, 5);
}
//-----------------------------------------------------------------------
EntityState::~EntityState()
{
        mAnimationState = NULL;
        mEntity = NULL;
}
//-----------------------------------------------------------------------
Entity *EntityState::GetEntity()
{
        return mEntity;
}
//-----------------------------------------------------------------------
EntityState::State EntityState::GetState()
{
        return mState;
}
//-----------------------------------------------------------------------
void EntityState::update(Real timeSinceLastFrame)
{
        mTimeElapsed -= timeSinceLastFrame * mAnimationSpeed;

        if (!mEntity || !mAnimationState)
                return;
        
        if (mState == MOVING) // toggle between moving (longer) and waiting (short)
        {
                SceneNode *parent = mEntity->getParentSceneNode();
                
                if (!parent)
                        return;

                if (mTimeElapsed <= 0) // toggle animation state
                {
                        if (mAnimationState->getAnimationName() == "Idle")
                        {
                                SetAnimationState("Walk", true);
                                
                                mTimeElapsed = walk_duration; // walk for mTimeElapsed units

                                // choose random rotation
                                Radian rnd = Radian(Math::UnitRandom() * Math::PI * rotate_factor);

                                //mEntity->getParentSceneNode()->rotate();
                                parent->yaw(rnd);                                               
                        }
                        else 
                        {
                                SetAnimationState("Idle", true);
                                mTimeElapsed = wait_duration; // wait for mTimeElapsed seconds
                        }
                }

                if (mAnimationState->getAnimationName() == "Walk") // move forward
                {
                        // store old position, just in case we get out of bounds
                        Vector3 oldPos = parent->getPosition();
                        parent->translate(parent->getLocalAxes(), Vector3(move_factor * mAnimationSpeed, 0, 0));

                        // HACK: if out of bounds => reset to old position and set animationstate to idle
                        if (OutOfBounds(parent)) 
                        {
                                parent->setPosition(oldPos);
                                SetAnimationState("Idle", true);
                                
                                mTimeElapsed = wait_duration;
                        }
                }
        }
                
        // add time to drive animation
        mAnimationState->addTime(timeSinceLastFrame * mAnimationSpeed);
}
//-----------------------------------------------------------------------
void EntityState::SetAnimationState(String stateStr, bool loop)
{
        if (!mEntity)
                return;

        mAnimationState = mEntity->getAnimationState(stateStr);
        mAnimationState->setLoop(loop);
        mAnimationState->setEnabled(true);
}
//-----------------------------------------------------------------------
bool EntityState::OutOfBounds(SceneNode *node)
{
        Vector3 pos = node->getPosition();

        if ((pos > msMinPos) && (pos < msMaxPos))
                return false;

        return true;
}



/*********************************************************/
/*      TestCullingTerrainApplication implementation     */
/*********************************************************/


TestCullingTerrainApplication::TestCullingTerrainApplication():
mTerrainContentGenerator(NULL), mRayQueryExecutor(NULL)
{
}
//-----------------------------------------------------------------------
TestCullingTerrainApplication::~TestCullingTerrainApplication()
{
        OGRE_DELETE(mTerrainContentGenerator);
        OGRE_DELETE(mRayQueryExecutor);

        deleteEntityStates();   
}
//-----------------------------------------------------------------------
void TestCullingTerrainApplication::deleteEntityStates()
{
        for (int i = 0; i < (int)mEntityStates.size(); ++i)
        {
                OGRE_DELETE(mEntityStates[i]);
        }

        mEntityStates.clear();
}
//-----------------------------------------------------------------------
void TestCullingTerrainApplication::createCamera()
{
        // create the camera
        mCamera = mSceneMgr->createCamera("PlayerCam");
        
        /** set a nice viewpoint
        *       we use a camera node here and apply all transformations on it instead
        *       of applying all transformations directly to the camera
        *       because then the camera is displayed correctly in the visualization
        */
        mCamNode = mSceneMgr->getRootSceneNode()->
                createChildSceneNode("CamNode1", Vector3(707, 5000, 528));
        //mCamera->setPosition(707, 5000, 528);
        mCamNode->setOrientation(Quaternion(-0.3486, 0.0122, 0.9365, 0.0329));
        mCamNode->attachObject(mCamera);

        //-- create visualization camera
        mVizCamera = mSceneMgr->createCamera("VizCam");
        mVizCamera->setPosition(mCamNode->getPosition());

        mVizCamera->setNearClipDistance(1);
        mCamera->setNearClipDistance(1);

        // infinite far plane?
        if (mRoot->getRenderSystem()->getCapabilities()->hasCapability(RSC_INFINITE_FAR_PLANE))
        {
                mVizCamera->setFarClipDistance(0);
                mCamera->setFarClipDistance(0);
        }
        else
        {
                 mVizCamera->setFarClipDistance(20000);
                 mCamera->setFarClipDistance(20000);
        }       
}

//-----------------------------------------------------------------------
bool TestCullingTerrainApplication::setup()
{
        bool carryOn = ExampleApplication::setup();

        if (carryOn)
                createRenderTargetListener();

        return carryOn;
}
//-----------------------------------------------------------------------
void TestCullingTerrainApplication::createRenderTargetListener()
{
        mWindow->addListener(new VisualizationRenderTargetListener(mSceneMgr));
}
//-----------------------------------------------------------------------
void TestCullingTerrainApplication::createScene()
{
        Real scale = 3;
        mSceneMgr->setOption("NodeVizScale", &scale);

        // Set ambient light
        mAmbientLight = ColourValue(0.5, 0.5, 0.5);
        mSceneMgr->setAmbientLight(mAmbientLight);
        
        //-- create light
        mSunLight = mSceneMgr->createLight("SunLight");
        mSunLight->setType(Light::LT_DIRECTIONAL);
        //mSunLight->setType(Light::LT_SPOTLIGHT);
        //mSunLight->setSpotlightRange(Degree(30), Degree(50));

    mSunLight->setPosition(707, 2000, 500);
        mSunLight->setCastShadows(true);

        // set light angle not too small over the surface, otherwise shadows textures will be broken
        Vector3 dir(0.5, 1, 0.5);
        dir.normalise();
        mSunLight->setDirection(dir);
        //mSunLight->setDirection(Vector3::NEGATIVE_UNIT_Y);
        mSunLight->setDiffuseColour(1, 1, 1);
        mSunLight->setSpecularColour(1, 1, 1);

        // -- 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/CloudyNoonSkyBox", 5000, true);
        
        std::string terrain_cfg("terrain.cfg");
#if OGRE_PLATFORM == OGRE_PLATFORM_APPLE
        terrain_cfg = mResourcePath + terrain_cfg;
#endif
        mSceneMgr->setWorldGeometry(terrain_cfg);
        

        //-- CEGUI setup
        setupGui();

        /* // occluder plane to test visibility
        Plane plane; plane.normal = Vector3::UNIT_Y;    plane.d = -60;
        MeshManager::getSingleton().createPlane("Myplane",
                ResourceGroupManager::DEFAULT_RESOURCE_GROUP_NAME, plane,
                5000,5000,100,100,true,1,5,5,Vector3::UNIT_Z);
        Entity* pPlaneEnt = mSceneMgr->createEntity( "plane", "Myplane" );
        pPlaneEnt->setMaterialName("Examples/Rockwall");
        pPlaneEnt->setCastShadows(true);
        mSceneMgr->getRootSceneNode()->createChildSceneNode()->attachObject(pPlaneEnt); */

        // Use 512x512 texture in GL since we can't go higher than the window res
        mSceneMgr->setShadowTextureSettings(1024, 2);

        mSceneMgr->setShadowColour(ColourValue(0.5, 0.5, 0.5));
   

        //-- terrain content setup

        // HACK: necessary to call once before the content creation for
        // terrain initialisation
        mSceneMgr->_renderScene(mCamera, mWindow->getViewport(0), true);

        // ray query executor: needed to clamp to terrain
        mRayQueryExecutor = new RayQueryExecutor(mSceneMgr);

        mTerrainMinPos = EntityState::msMinPos = Vector3(0, 0, 0);
        mTerrainMaxPos = EntityState::msMaxPos = Vector3(5000, 5000, 5000);

        mTerrainContentGenerator = new TerrainContentGenerator(mSceneMgr);
        
        // if no objects in file, we generate new objects
        if (!mTerrainContentGenerator->LoadObjects("objects.out"))
        {
                // the objects are generated randomly distributed over the terrain
                generateScene(1000, 0); // create soldiers, trees, ninjas
                if (0)
                        generateScene(500, 1);
                generateScene(500, 2);
        }
}
//-----------------------------------------------------------------------
void  TestCullingTerrainApplication::generateScene(int num, int objectType)
{
        float val = TerrainFrameListener::msObjectScales[objectType];
        Vector3 scale(val, val, val); 
        const float maxHeight = 75;
        
        // In order to provide much occlusion,
        // height is restricted to maxHeight => no objects are created on peaks
        mTerrainContentGenerator->SetMinPos(Vector3(mTerrainMinPos));
        mTerrainContentGenerator->SetMaxPos(Vector3(mTerrainMaxPos.x, maxHeight, mTerrainMaxPos.z));
        
        //std::stringstream d; d << "objscale: " << scale[0];
        //Ogre::LogManager::getSingleton().logMessage(d.str());
        
        mTerrainContentGenerator->SetScale(scale);
        mTerrainContentGenerator->SetOffset(TerrainFrameListener::msObjectTerrainOffsets[objectType]);
        mTerrainContentGenerator->GenerateScene(num, TerrainFrameListener::msObjectCaptions[objectType]);

        if (objectType != 0) // from our objects, only robot has animation phases
                return;

        EntityList *entList = mTerrainContentGenerator->GetGeneratedEntities();

        //-- add animation state for new robots (located at the end of the list)
        for (int i = (int)entList->size() - num; i < (int)entList->size(); ++i)
        {
                mEntityStates.push_back(new EntityState((*entList)[i], 
                        EntityState::WAITING, Math::RangeRandom(0.5, 1.5)));
        }

        // release limitations on height => it is possible for the user to put single 
        // objects on peaks of the terrain (will be only few, not relevant for occlusion)
        mTerrainContentGenerator->SetMaxPos(mTerrainMaxPos);
}
//-----------------------------------------------------------------------
void TestCullingTerrainApplication::updateAnimations(Real timeSinceLastFrame)
{
        for (int i = 0; i < (int)mEntityStates.size(); ++i)
        {
                SceneNode *sn = mEntityStates[i]->GetEntity()->getParentSceneNode();

                mEntityStates[i]->update(timeSinceLastFrame);

                if (mEntityStates[i]->GetState() == EntityState::MOVING)
                {
                        Clamp2Terrain(sn, 0); //sn->setNodeVisible(false);
                }
        }
}
//-----------------------------------------------------------------------
EntityStates  &TestCullingTerrainApplication::getEntityStates()
{
        return mEntityStates;
}
//-----------------------------------------------------------------------
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().hide();
}
//-----------------------------------------------------------------------
void TestCullingTerrainApplication::createFrameListener()
{
        mTerrainFrameListener = new TerrainFrameListener(mWindow, mCamera, mSceneMgr, 
                mGUIRenderer, mTerrainContentGenerator, mVizCamera, mCamNode, mSunLight, this);
        
        mRoot->addFrameListener(mTerrainFrameListener);
}
//-----------------------------------------------------------------------
void TestCullingTerrainApplication::chooseSceneManager()
{
        mSceneMgr = mRoot->getSceneManager(ST_EXTERIOR_CLOSE);
}
//-----------------------------------------------------------------------
bool TestCullingTerrainApplication::Clamp2Terrain(SceneNode *node, int terrainOffs)
{
        // clamp scene node to terrain
        Vector3 pos = node->getPosition();
        Vector3 queryResult;

        if (mRayQueryExecutor->executeRayQuery(&queryResult, 
                        Vector3(pos.x, MAX_HEIGHT, pos.z), Vector3::NEGATIVE_UNIT_Y))
        {
        node->setPosition(pos.x, queryResult.y + terrainOffs, pos.z);
                return true;
        }

        return false;
}


/**************************************************************/
/*      VisualizationRenderTargetListener implementation      */
/**************************************************************/
//-----------------------------------------------------------------------
VisualizationRenderTargetListener::VisualizationRenderTargetListener(SceneManager *sceneMgr)
:RenderTargetListener(), mSceneMgr(sceneMgr)
{
}
//-----------------------------------------------------------------------
void VisualizationRenderTargetListener::preViewportUpdate(const RenderTargetViewportEvent &evt)
{
        // visualization viewport
        const bool showViz = evt.source->getZOrder() == VIZ_VIEWPORT_Z_ORDER;
        const bool nShowViz = !showViz;

        mSavedShadowTechnique = mSceneMgr->getShadowTechnique();
        mSavedAmbientLight = mSceneMgr->getAmbientLight();

        // -- ambient light must be full for visualization, shadows disabled
    if (showViz)
        {
                mSceneMgr->setAmbientLight(ColourValue(1, 1, 1));
                mSceneMgr->setShadowTechnique(SHADOWTYPE_NONE);
        }
        
    mSceneMgr->setOption("PrepareVisualization", &showViz);
        mSceneMgr->setOption("SkyBoxEnabled", &nShowViz);
        //mSceneMgr->setOption("SkyPlaneEnabled", &showViz);
        
        RenderTargetListener::preViewportUpdate(evt);
}
//-----------------------------------------------------------------------
void VisualizationRenderTargetListener::postRenderTargetUpdate(const RenderTargetEvent &evt)
{
        // reset values
        mSceneMgr->setShadowTechnique(mSavedShadowTechnique);
        mSceneMgr->setAmbientLight(mSavedAmbientLight);
        
        RenderTargetListener::postRenderTargetUpdate(evt);
}
//-----------------------------------------------------------------------
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;
}