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 <OgreTerrain.h>
#include <OgreTerrainGroup.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 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 //
  //////////////////////
  bool nextLocation();

  std::deque<Ogre::Vector3> mWalkList;

  Ogre::Real mDistance;
  Ogre::Real mWalkSpd;
  Ogre::Vector3 mDirection;
  Ogre::Vector3 mDestination;
  Ogre::AnimationState* mAnimationState;
  Ogre::Entity* mEntity;
  Ogre::SceneNode* mNode;
};

#endif

BasicApp.cpp
#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),
    mDistance(0),
    mWalkSpd(70.0),
    mDirection(Ogre::Vector3::ZERO),
    mDestination(Ogre::Vector3::ZERO),
    mAnimationState(0),
    mEntity(0),
    mNode(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;
  
  if (mDirection == Ogre::Vector3::ZERO)
  {
    if (nextLocation())
    {
      mAnimationState = mEntity->getAnimationState("Walk");
      mAnimationState->setLoop(true);
      mAnimationState->setEnabled(true);
    }
  }
  else
  {
    Ogre::Real move = mWalkSpd * fe.timeSinceLastFrame;
    mDistance -= move;

    if (mDistance <= 0.0)
    {
      mNode->setPosition(mDestination);
      mDirection = Ogre::Vector3::ZERO;

      if (nextLocation())
      {
	Ogre::Vector3 src = mNode->getOrientation() * Ogre::Vector3::UNIT_X;

	if ((1.0 + src.dotProduct(mDirection)) < 0.0001)
	{
	  mNode->yaw(Ogre::Degree(180));
	}
	else
	{
	  Ogre::Quaternion quat = src.getRotationTo(mDirection);
	  mNode->rotate(quat);
	}
      }
      else
      {
	mAnimationState = mEntity->getAnimationState("Idle");
	mAnimationState->setLoop(true);
	mAnimationState->setEnabled(true);
      }
    }
    else
    {
      mNode->translate(move * mDirection);
    }
  }

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

  mAnimationState->addTime(fe.timeSinceLastFrame);

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

  mCameraMan->frameRenderingQueued(fe);

  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(0.7, 0.7, 0.7));

  mEntity = mSceneMgr->createEntity("robot.mesh");
  mNode = mSceneMgr->getRootSceneNode()->createChildSceneNode(
    Ogre::Vector3(0, 0, 25.0));
  mNode->attachObject(mEntity);

  mWalkList.push_back(Ogre::Vector3(550.0, 0, 50.0));
  mWalkList.push_back(Ogre::Vector3(-150.0, 0, -200.0));
  mWalkList.push_back(Ogre::Vector3(0, 0, 25.0));
  mWalkList.push_back(Ogre::Vector3(550.0, 0, 50.0));

  Ogre::Entity* ent;
  Ogre::SceneNode* node;

  ent = mSceneMgr->createEntity("knot.mesh");
  ent->setMaterialName("Examples/KnotTexture");
  node = mSceneMgr->getRootSceneNode()->createChildSceneNode(
    Ogre::Vector3(0, -10.0, 25.0));
  node->attachObject(ent);
  node->setScale(0.1, 0.1, 0.1);

  ent = mSceneMgr->createEntity("knot.mesh");
  ent->setMaterialName("Examples/KnotTexture");
  node = mSceneMgr->getRootSceneNode()->createChildSceneNode(
    Ogre::Vector3(550.0, -10.0, 50.0));
  node->attachObject(ent);
  node->setScale(0.1, 0.1, 0.1);

  ent = mSceneMgr->createEntity("knot.mesh");
  ent->setMaterialName("Examples/KnotTexture");
  node = mSceneMgr->getRootSceneNode()->createChildSceneNode(
    Ogre::Vector3(-150.0, -10.0, -200.0));
  node->attachObject(ent);
  node->setScale(0.1, 0.1, 0.1);

  mCamera->setPosition(90.0, 280.0, 535.0);
  mCamera->pitch(Ogre::Degree(-30.0));
  mCamera->yaw(Ogre::Degree(-15.0));

  mAnimationState = mEntity->getAnimationState("Idle");
  mAnimationState->setLoop(true);
  mAnimationState->setEnabled(true);

  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;
}

bool BasicApp::nextLocation()
{
  if (mWalkList.empty())
    return false;

  mDestination = mWalkList.front();
  mWalkList.pop_front();
  mDirection = mDestination - mNode->getPosition();
  mDistance = mDirection.normalise();

  return 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