BasicApp.h
#ifndef BASICAPP_H
#define BASICAPP_H

#include <OgreRoot.h>
#include <OgreCamera.h>
#include <OgreViewport.h>
#include <OgreSceneManager.h>
#include <OgreRenderWindow.h>
#include <OgreConfigFile.h>
#include <OgreException.h>
#include <OgreEntity.h>
#include <OgreFrameListener.h>
#include <OgreWindowEventUtilities.h>
#include <OgreRenderTargetListener.h>

#include <OISEvents.h>
#include <OISInputManager.h>
#include <OISKeyboard.h>
#include <OISMouse.h>

#include <CEGUI/CEGUI.h>
#include <CEGUI/RendererModules/Ogre/Renderer.h>

#include <SdkCameraMan.h>

class BasicApp
  : public Ogre::WindowEventListener,
    public Ogre::FrameListener,
    public Ogre::RenderTargetListener,
    public OIS::KeyListener,
    public OIS::MouseListener
{
public:
  BasicApp();
  ~BasicApp();

  void go();

private:
  virtual bool frameRenderingQueued(const Ogre::FrameEvent& fe);

  virtual bool keyPressed(const OIS::KeyEvent& ke);
  virtual bool keyReleased(const OIS::KeyEvent& ke);

  virtual bool mouseMoved(const OIS::MouseEvent& me);
  virtual bool mousePressed(const OIS::MouseEvent& me, OIS::MouseButtonID id);
  virtual bool mouseReleased(const OIS::MouseEvent& me, OIS::MouseButtonID id);

  virtual void windowResized(Ogre::RenderWindow* rw);
  virtual void windowClosed(Ogre::RenderWindow* rw);

  bool setup();
  bool configure();
  void chooseSceneManager();
  void createCamera();
  void createScene();
  void destroyScene();
  void createFrameListener();
  void createViewports();
  void setupResources();
  void createResourceListener();
  void loadResources();

  bool mShutdown;

  Ogre::Root* mRoot;
  Ogre::Camera* mCamera;
  Ogre::SceneManager* mSceneMgr;
  Ogre::RenderWindow* mWindow;
  Ogre::String mResourcesCfg;
  Ogre::String mPluginsCfg;

  OgreBites::SdkCameraMan* mCameraMan;

  // CEGUI
  bool setupCEGUI();

  CEGUI::OgreRenderer* mRenderer;

  // OIS
  OIS::Mouse* mMouse;
  OIS::Keyboard* mKeyboard;
  OIS::InputManager* mInputMgr;

  //////////////////////
  // Tutorial Section //
  //////////////////////
  virtual void preRenderTargetUpdate(const Ogre::RenderTargetEvent& rte);
  virtual void postRenderTargetUpdate(const Ogre::RenderTargetEvent& rte);

  Ogre::MovablePlane* mPlane;
  Ogre::Entity* mPlaneEntity;
  Ogre::SceneNode* mPlaneNode;
  Ogre::Rectangle2D* mMiniscreen;
};

#endif

BasicApp.h
#include "BasicApp.h"

BasicApp::BasicApp()
  : mShutdown(false),
    mRoot(0),
    mCamera(0),
    mSceneMgr(0),
    mWindow(0),
    mResourcesCfg(Ogre::StringUtil::BLANK),
    mPluginsCfg(Ogre::StringUtil::BLANK),
    mCameraMan(0),
    mRenderer(0),
    mMouse(0),
    mKeyboard(0),
    mInputMgr(0)
{
}

BasicApp::~BasicApp()
{
  if (mCameraMan) delete mCameraMan;

  Ogre::WindowEventUtilities::removeWindowEventListener(mWindow, this);
  windowClosed(mWindow);

  delete mRoot;
}

void BasicApp::go()
{
  #ifdef _DEBUG
    mResourcesCfg = "resources_d.cfg";
    mPluginsCfg = "plugins_d.cfg";
  #else
    mResourcesCfg = "resources.cfg";
    mPluginsCfg = "plugins.cfg";
  #endif

  if (!setup())
    return;

  mRoot->startRendering();

  destroyScene();
}

bool BasicApp::frameRenderingQueued(const Ogre::FrameEvent& fe)
{
  if (mKeyboard->isKeyDown(OIS::KC_ESCAPE))
    mShutdown = true;

  if (mShutdown)
    return false;

  if (mWindow->isClosed())
    return false;

  mKeyboard->capture();
  mMouse->capture();

  mPlaneNode->yaw(Ogre::Radian(0.5 * fe.timeSinceLastFrame));

  mCameraMan->frameRenderingQueued(fe);

  CEGUI::System::getSingleton().injectTimePulse(fe.timeSinceLastFrame);

  return true;
}

bool BasicApp::keyPressed(const OIS::KeyEvent& ke)
{
  // CEGUI::GUIContext& context = CEGUI::System::getSingleton().getDefaultGUIContext();
  // context.injectKeyDown((CEGUI::Key::Scan)ke.key);
  // context.injectChar((CEGUI::Key::Scan)ke.text);

  mCameraMan->injectKeyDown(ke);

  return true;
}

bool BasicApp::keyReleased(const OIS::KeyEvent& ke)
{
  // CEGUI::GUIContext& context = CEGUI::System::getSingleton().getDefaultGUIContext();
  // context.injectKeyUp((CEGUI::Key::Scan)ke.key);

  mCameraMan->injectKeyUp(ke);

  return true;
}

bool BasicApp::mouseMoved(const OIS::MouseEvent& me)
{
  // CEGUI::GUIContext& context = CEGUI::System::getSingleton().getDefaultGUIContext();
  // context.injectMouseMove(me.state.X.rel, me.state.Y.rel);

  mCameraMan->injectMouseMove(me);

  return true;
}

// Helper function for mouse events
CEGUI::MouseButton convertButton(OIS::MouseButtonID id)
{
  switch (id)
  {
  case OIS::MB_Left:
    return CEGUI::LeftButton;
  case OIS::MB_Right:
    return CEGUI::RightButton;
  case OIS::MB_Middle:
    return CEGUI::MiddleButton;
  default:
    return CEGUI::LeftButton;
  }
}

bool BasicApp::mousePressed(const OIS::MouseEvent& me, OIS::MouseButtonID id)
{
  // CEGUI::GUIContext& context = CEGUI::System::getSingleton().getDefaultGUIContext();
  // context.injectMouseButtonDown(convertButton(id));

  mCameraMan->injectMouseDown(me, id);

  return true;
}

bool BasicApp::mouseReleased(const OIS::MouseEvent& me, OIS::MouseButtonID id)
{
  // CEGUI::GUIContext& context = CEGUI::System::getSingleton().getDefaultGUIContext();
  // context.injectMouseButtonUp(convertButton(id));

  mCameraMan->injectMouseUp(me, id);

  return true;
}

void BasicApp::windowResized(Ogre::RenderWindow* rw)
{
  unsigned int width, height, depth;
  int left, top;
  rw->getMetrics(width, height, depth, left, top);

  const OIS::MouseState& ms = mMouse->getMouseState();
  ms.width = width;
  ms.height = height;
}

void BasicApp::windowClosed(Ogre::RenderWindow* rw)
{
  if (rw == mWindow)
  {
    if (mInputMgr)
    {
      mInputMgr->destroyInputObject(mMouse);
      mInputMgr->destroyInputObject(mKeyboard);

      OIS::InputManager::destroyInputSystem(mInputMgr);
      mInputMgr = 0;
    }
  }
}

bool BasicApp::setup()
{
  mRoot = new Ogre::Root(mPluginsCfg);

  setupResources();

  if (!configure())
    return false;

  chooseSceneManager();
  createCamera();
  createViewports();

  Ogre::TextureManager::getSingleton().setDefaultNumMipmaps(5);

  createResourceListener();
  loadResources();

  setupCEGUI();

  createScene();

  createFrameListener();

  return true;
}

bool BasicApp::configure()
{
  if (!(mRoot->restoreConfig() || mRoot->showConfigDialog()))
  {
    return false;
  }

  mWindow = mRoot->initialise(true, "ITutorial");

  return true;
}

void BasicApp::chooseSceneManager()
{
  mSceneMgr = mRoot->createSceneManager(Ogre::ST_EXTERIOR_CLOSE);
}

void BasicApp::createCamera()
{
  mCamera = mSceneMgr->createCamera("PlayerCam");

  mCamera->setPosition(Ogre::Vector3(0, 0, 80));
  mCamera->lookAt(Ogre::Vector3(0, 0, -300));
  mCamera->setNearClipDistance(5);

  mCameraMan = new OgreBites::SdkCameraMan(mCamera);
}

void BasicApp::createScene()
{
  mSceneMgr->setAmbientLight(Ogre::ColourValue(0.2, 0.2, 0.2));

  Ogre::Light* light = mSceneMgr->createLight("MainLight");
  light->setPosition(20, 80, 50);

  mCamera->setPosition(60, 200, 70);
  mCamera->lookAt(0,0,0);

  Ogre::MaterialPtr mat =
    Ogre::MaterialManager::getSingleton().create(
      "PlaneMat", Ogre::ResourceGroupManager::DEFAULT_RESOURCE_GROUP_NAME);

  Ogre::TextureUnitState* tuisTexture =
    mat->getTechnique(0)->getPass(0)->createTextureUnitState("grass_1024.jpg");

  mPlane = new Ogre::MovablePlane("Plane");
  mPlane->d = 0;
  mPlane->normal = Ogre::Vector3::UNIT_Y;

  Ogre::MeshManager::getSingleton().createPlane(
    "PlaneMesh",
    Ogre::ResourceGroupManager::DEFAULT_RESOURCE_GROUP_NAME,
    *mPlane,
    120, 120, 1, 1,
    true,
    1, 1, 1,
    Ogre::Vector3::UNIT_Z);
  mPlaneEntity = mSceneMgr->createEntity("PlaneMesh");
  mPlaneEntity->setMaterialName("PlaneMat");

  mPlaneNode = mSceneMgr->getRootSceneNode()->createChildSceneNode();
  mPlaneNode->attachObject(mPlaneEntity);

  Ogre::TexturePtr rttTexture =
    Ogre::TextureManager::getSingleton().createManual(
      "RttTex",
      Ogre::ResourceGroupManager::DEFAULT_RESOURCE_GROUP_NAME,
      Ogre::TEX_TYPE_2D,
      mWindow->getWidth(), mWindow->getHeight(),
      0,
      Ogre::PF_R8G8B8,
      Ogre::TU_RENDERTARGET);

  Ogre::RenderTexture* renderTexture = rttTexture->getBuffer()->getRenderTarget();
  renderTexture->addViewport(mCamera);
  renderTexture->getViewport(0)->setClearEveryFrame(true);
  renderTexture->getViewport(0)->setBackgroundColour(Ogre::ColourValue::Black);
  renderTexture->getViewport(0)->setOverlaysEnabled(false);

  renderTexture->update();
  renderTexture->writeContentsToFile("start.png");

  mMiniscreen = new Ogre::Rectangle2D(true);
  mMiniscreen->setCorners(.5, 1.0, 1.0, .5);
  mMiniscreen->setBoundingBox(Ogre::AxisAlignedBox::BOX_INFINITE);

  Ogre::SceneNode* miniscreenNode =
    mSceneMgr->getRootSceneNode()->createChildSceneNode();
  miniscreenNode->attachObject(mMiniscreen);

  Ogre::MaterialPtr renderMat =
    Ogre::MaterialManager::getSingleton().create(
      "RttMat",
      Ogre::ResourceGroupManager::DEFAULT_RESOURCE_GROUP_NAME);
  renderMat->getTechnique(0)->getPass(0)->setLightingEnabled(false);
  renderMat->getTechnique(0)->getPass(0)->createTextureUnitState("RttTex");

  mMiniscreen->setMaterial("RttMat");

  renderTexture->addListener(this);

  CEGUI::WindowManager& wmgr = CEGUI::WindowManager::getSingleton();
  CEGUI::Window* rootWin = wmgr.loadLayoutFromFile("test.layout");

  CEGUI::System::getSingleton().getDefaultGUIContext().setRootWindow(rootWin);

}

void BasicApp::destroyScene()
{
}

void BasicApp::createFrameListener()
{
  Ogre::LogManager::getSingletonPtr()->logMessage("*** Initializing OIS ***");

  OIS::ParamList pl;
  size_t windowHnd = 0;
  std::ostringstream windowHndStr;

  mWindow->getCustomAttribute("WINDOW", &windowHnd);
  windowHndStr << windowHnd;
  pl.insert(std::make_pair(std::string("WINDOW"), windowHndStr.str()));

  mInputMgr = OIS::InputManager::createInputSystem(pl);

  mKeyboard = static_cast<OIS::Keyboard*>(
    mInputMgr->createInputObject(OIS::OISKeyboard, true));
  mMouse = static_cast<OIS::Mouse*>(
    mInputMgr->createInputObject(OIS::OISMouse, true));

  mKeyboard->setEventCallback(this);
  mMouse->setEventCallback(this);

  windowResized(mWindow);

  Ogre::WindowEventUtilities::addWindowEventListener(mWindow, this);

  mRoot->addFrameListener(this);

  Ogre::LogManager::getSingletonPtr()->logMessage("Finished");
}

void BasicApp::createViewports()
{
  Ogre::Viewport* vp = mWindow->addViewport(mCamera);
  vp->setBackgroundColour(Ogre::ColourValue(0, 0, 0));

  mCamera->setAspectRatio(
    Ogre::Real(vp->getActualWidth()) /
    Ogre::Real(vp->getActualHeight()));
}

void BasicApp::setupResources()
{
  Ogre::ConfigFile cf;
  cf.load(mResourcesCfg);

  Ogre::String secName, typeName, archName;
  Ogre::ConfigFile::SectionIterator secIt = cf.getSectionIterator();

  while (secIt.hasMoreElements())
  {
    secName = secIt.peekNextKey();
    Ogre::ConfigFile::SettingsMultiMap* settings = secIt.getNext();
    Ogre::ConfigFile::SettingsMultiMap::iterator setIt;

    for (setIt = settings->begin(); setIt != settings->end(); ++setIt)
    {
      typeName = setIt->first;
      archName = setIt->second;
      Ogre::ResourceGroupManager::getSingleton().addResourceLocation(
	archName, typeName, secName);
    }
  }
}

void BasicApp::createResourceListener()
{
}

void BasicApp::loadResources()
{
  Ogre::ResourceGroupManager::getSingleton().initialiseAllResourceGroups();
}

bool BasicApp::setupCEGUI()
{
  Ogre::LogManager::getSingletonPtr()->logMessage("*** Initializing CEGUI ***");

  mRenderer = &CEGUI::OgreRenderer::bootstrapSystem();

  CEGUI::ImageManager::setImagesetDefaultResourceGroup("Imagesets");
  CEGUI::Font::setDefaultResourceGroup("Fonts");
  CEGUI::Scheme::setDefaultResourceGroup("Schemes");
  CEGUI::WidgetLookManager::setDefaultResourceGroup("LookNFeel");
  CEGUI::WindowManager::setDefaultResourceGroup("Layouts");

  CEGUI::SchemeManager::getSingleton().createFromFile("TaharezLook.scheme");
  CEGUI::FontManager::getSingleton().createFromFile("DejaVuSans-10.font");

  CEGUI::GUIContext& context = CEGUI::System::getSingleton().getDefaultGUIContext();

  context.setDefaultFont("DejaVuSans-10");
  context.getMouseCursor().setDefaultImage("TaharezLook/MouseArrow");

  Ogre::LogManager::getSingletonPtr()->logMessage("Finished");

  return true;
}

void BasicApp::preRenderTargetUpdate(const Ogre::RenderTargetEvent& rte)
{
  mMiniscreen->setVisible(false);
}

void BasicApp::postRenderTargetUpdate(const Ogre::RenderTargetEvent& rte)
{
  mMiniscreen->setVisible(true);
}

#if OGRE_PLATFORM == OGRE_PLATFORM_WIN32
  #define WIN32_LEAN_AND_MEAN
  #include "windows.h"
#endif

#ifdef __cplusplus
  extern "C" {
#endif

#if OGRE_PLATFORM == OGRE_PLATFORM_WIN32
  INT WINAPI WinMain(HINSTANCE hInst, HINSTANCE, LPSTR strCmdLine, INT)
#else
  int main(int argc, char *argv[])
#endif
{
  BasicApp app;

  try
  {
    app.go();
  }
  catch(Ogre::Exception& e)
  {
    #if OGRE_PLATFORM == OGRE_PLATFORM_WIN32
      MessageBox(
	NULL,
	e.getFullDescription().c_str(),
	"An exception has occured!",
	MB_OK | MB_ICONERROR | MB_TASKMODAL);
    #else
      std::cerr << "An exception has occured: " <<
	e.getFullDescription().c_str() << std::endl;
    #endif
  }

  return 0;
}

#ifdef __cplusplus
  }
#endif
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