Hi!

I was using QT 4.4 and Ogre3D 1.4.9 to create a level editor in visual studio 8. I was able to get an Ogre window up and running as a widget and got some more features working. However, this morning all of a sudden it started giving me some MOC errors on the Ogre widget cpp file out of nowhere. I retraced my steps and took out the new changes but the error did not seem to go away.

Just for the heck of it, I started a project from scratch and pasted a fresh block of code (just to get basic ogre window up and running, this worked the last time) and I keep getting similar error. I checked the Ogre log and it is blank...which means Ogre never initialized at all.

Here are the errors I am getting:

1>------ Build started: Project: WorldBuilder, Configuration: Debug Win32 ------
1>Moc'ing ogrewidget.h...
1>Uic'ing d:\My Documents\Projects\Ogre3D\WorldBuilder\WorldBuilde r\worldbuilder.ui...
1>Moc'ing worldbuilder.h...
1>Compiling...
1>main.cpp
1>worldbuilder.cpp
1>ogrewidget.cpp
1>Generating Code...
1>Compiling...
1>moc_ogrewidget.cpp
1>d:\my documents\projects\ogre3d\worldbuilder\worldbuilde r\generatedfiles\debug\moc_ogrewidget.cpp(37) : error C3083: 'OgreWidget': the symbol to the left of a '::' must be a type
1>d:\my documents\projects\ogre3d\worldbuilder\worldbuilde r\generatedfiles\debug\moc_ogrewidget.cpp(37) : error C2039: 'staticMetaObject' : is not a member of 'Ogre'
1>d:\my documents\projects\ogre3d\worldbuilder\worldbuilde r\generatedfiles\debug\moc_ogrewidget.cpp(42) : error C3083: 'OgreWidget': the symbol to the left of a '::' must be a type
1>d:\my documents\projects\ogre3d\worldbuilder\worldbuilde r\generatedfiles\debug\moc_ogrewidget.cpp(42) : error C2039: 'metaObject' : is not a member of 'Ogre'
1>d:\my documents\projects\ogre3d\worldbuilder\worldbuilde r\generatedfiles\debug\moc_ogrewidget.cpp(43) : error C2270: 'metaObject' : modifiers not allowed on nonmember functions
1>d:\my documents\projects\ogre3d\worldbuilder\worldbuilde r\generatedfiles\debug\moc_ogrewidget.cpp(47) : error C3083: 'OgreWidget': the symbol to the left of a '::' must be a type
1>d:\my documents\projects\ogre3d\worldbuilder\worldbuilde r\generatedfiles\debug\moc_ogrewidget.cpp(47) : error C2039: 'qt_metacast' : is not a member of 'Ogre'
1>d:\my documents\projects\ogre3d\worldbuilder\worldbuilde r\generatedfiles\debug\moc_ogrewidget.cpp(51) : error C2673: 'qt_metacast' : global functions do not have 'this' pointers
1>d:\my documents\projects\ogre3d\worldbuilder\worldbuilde r\generatedfiles\debug\moc_ogrewidget.cpp(52) : error C2352: 'QWidget::qt_metacast' : illegal call of non-static member function
1> c:\qt\4.4.0\src\gui\kernel\qwidget.h(122) : see declaration of 'QWidget::qt_metacast'
1>d:\my documents\projects\ogre3d\worldbuilder\worldbuilde r\generatedfiles\debug\moc_ogrewidget.cpp(55) : error C3083: 'OgreWidget': the symbol to the left of a '::' must be a type
1>d:\my documents\projects\ogre3d\worldbuilder\worldbuilde r\generatedfiles\debug\moc_ogrewidget.cpp(55) : error C2039: 'qt_metacall' : is not a member of 'Ogre'
1>d:\my documents\projects\ogre3d\worldbuilder\worldbuilde r\generatedfiles\debug\moc_ogrewidget.cpp(57) : error C2352: 'QWidget::qt_metacall' : illegal call of non-static member function
1> c:\qt\4.4.0\src\gui\kernel\qwidget.h(122) : see declaration of 'QWidget::qt_metacall'
1>Build log was saved at "file://d:\My Documents\Projects\Ogre3D\WorldBuilder\WorldBuilde r\Debug\BuildLog.htm"
1>WorldBuilder - 12 error(s), 0 warning(s)
========== Build: 0 succeeded, 1 failed, 0 up-to-date, 0 skipped ==========


Here ar ethe only two files that I have added to the basic QT project: (then I created a widget in the .ui file and promoted it to OgreWidget)

OgreWidget.h
Qt Code: 
  1. #ifndef OGREWIDGET_H_
  2. #define OGREWIDGET_H_
  3.  
  4. #include <QWidget>
  5.  
  6. #include <Ogre.h>
  7.  
  8. class OgreWidget : public QWidget
  9. {
  10. Q_OBJECT
  11.  
  12. public:
  13. OgreWidget(QWidget* parent);
  14. ~OgreWidget();
  15.  
  16. protected:
  17. void paintEvent(QPaintEvent* evt);
  18. void resizeEvent(QResizeEvent* evt);
  19. void timerEvent(QTimerEvent* evt);
  20.  
  21. void refresh();
  22.  
  23. private:
  24. Ogre::Root* root;
  25. Ogre::SceneManager* sceneManager;
  26. Ogre::RenderWindow* window;
  27. Ogre::Camera* cam;
  28. };
  29.  
  30. #endif /*OGREWIDGET_H_*/
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OgreWidget.cpp
Qt Code: 
  1. #include "ogrewidget.h"
  2.  
  3. #include <QMouseEvent>
  4.  
  5. OgreWidget::OgreWidget(QWidget* parent) : QWidget(parent, Qt::MSWindowsOwnDC)
  6. {
  7. setAttribute(Qt::WA_PaintOnScreen);
  8. setAttribute(Qt::WA_NoBackground);
  9.  
  10. root = 0;
  11. sceneManager = 0;
  12. window = 0;
  13. cam = 0;
  14. }
  15.  
  16. OgreWidget::~OgreWidget()
  17. {
  18. }
  19.  
  20. void OgreWidget::paintEvent(QPaintEvent* evt)
  21. {
  22. if(!window)
  23. {
  24. using namespace Ogre;
  25.  
  26. Ogre::NameValuePairList params;
  27. WId wid = winId();
  28. params["externalWindowHandle"] = Ogre::StringConverter::toString((size_t)wid);
  29.  
  30. // This doesn't actually work anymore. Look at the Qt Ogre model viewer for how to do this.
  31. #if !defined(Q_WS_WIN)
  32. char buf[64];
  33. sprintf(buf, "SDL_WINDOWID=0x%1x", wid);
  34. putenv(buf);
  35. #endif
  36.  
  37. root = new Ogre::Root();
  38.  
  39. root->loadPlugin("RenderSystem_GL_d");
  40.  
  41. Ogre::RenderSystemList *list = root->getAvailableRenderers();
  42. Ogre::RenderSystemList::iterator i = list->begin();
  43.  
  44. while (i != list->end())
  45. {
  46. if ((*i)->getName() == "OpenGL Rendering Subsystem")
  47. {
  48. root->setRenderSystem(*(i));
  49. break;
  50. }
  51.  
  52. i++;
  53. }
  54.  
  55. root->initialise(false);
  56.  
  57. window = root->createRenderWindow("OgreWindow", width(), height(), false, &params);
  58. sceneManager = root->createSceneManager(Ogre::ST_GENERIC);
  59.  
  60. ResourceGroupManager::getSingleton().initialiseAllResourceGroups();
  61.  
  62. cam = sceneManager->createCamera("Cam");
  63.  
  64. window->addViewport(cam)->setBackgroundColour(Ogre::ColourValue::Black);
  65.  
  66. cam->setPosition(0, 150, 100);
  67. cam->lookAt(0, 150, 0);
  68.  
  69. startTimer(60);
  70. }
  71.  
  72. refresh();
  73. }
  74.  
  75. void OgreWidget::resizeEvent(QResizeEvent* evt)
  76. {
  77. if(window)
  78. {
  79. window->resize(width(), height());
  80. window->windowMovedOrResized();
  81. cam->setAspectRatio(Ogre::Real(window->getViewport(0)->getActualWidth()) / Ogre::Real(window->getViewport(0)->getActualHeight()));
  82. }
  83. }
  84.  
  85. void OgreWidget::timerEvent(QTimerEvent* evt)
  86. {
  87. refresh();
  88. }
  89.  
  90. void OgreWidget::refresh()
  91. {
  92. Ogre::Root::getSingleton()._fireFrameStarted();
  93. window->update();
  94. Ogre::Root::getSingleton()._fireFrameEnded();
  95. }
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contents of moc_ogrewidget.cpp
Qt Code: 
  1. /****************************************************************************
  2. ** Meta object code from reading C++ file 'ogrewidget.h'
  3. **
  4. ** Created: Tue Aug 12 02:00:54 2008
  5. ** by: The Qt Meta Object Compiler version 59 (Qt 4.4.0)
  6. **
  7. ** WARNING! All changes made in this file will be lost!
  8. *****************************************************************************/
  9.  
  10. #include "../../Source/ogrewidget.h"
  11. #if !defined(Q_MOC_OUTPUT_REVISION)
  12. #error "The header file 'ogrewidget.h' doesn't include <QObject>."
  13. #elif Q_MOC_OUTPUT_REVISION != 59
  14. #error "This file was generated using the moc from 4.4.0. It"
  15. #error "cannot be used with the include files from this version of Qt."
  16. #error "(The moc has changed too much.)"
  17. #endif
  18.  
  19. QT_BEGIN_MOC_NAMESPACE
  20. static const uint qt_meta_data_Ogre__OgreWidget[] = {
  21.  
  22. // content:
  23. 1, // revision
  24. 0, // classname
  25. 0, 0, // classinfo
  26. 0, 0, // methods
  27. 0, 0, // properties
  28. 0, 0, // enums/sets
  29.  
  30. 0 // eod
  31. };
  32.  
  33. static const char qt_meta_stringdata_Ogre__OgreWidget[] = {
  34. "Ogre::OgreWidget\0"
  35. };
  36.  
  37. const QMetaObject Ogre::OgreWidget::staticMetaObject = {
  38. { &QWidget::staticMetaObject, qt_meta_stringdata_Ogre__OgreWidget,
  39. qt_meta_data_Ogre__OgreWidget, 0 }
  40. };
  41.  
  42. const QMetaObject *Ogre::OgreWidget::metaObject() const
  43. {
  44. return &staticMetaObject;
  45. }
  46.  
  47. void *Ogre::OgreWidget::qt_metacast(const char *_clname)
  48. {
  49. if (!_clname) return 0;
  50. if (!strcmp(_clname, qt_meta_stringdata_Ogre__OgreWidget))
  51. return static_cast<void*>(const_cast< OgreWidget*>(this));
  52. return QWidget::qt_metacast(_clname);
  53. }
  54.  
  55. int Ogre::OgreWidget::qt_metacall(QMetaObject::Call _c, int _id, void **_a)
  56. {
  57. _id = QWidget::qt_metacall(_c, _id, _a);
  58. if (_id < 0)
  59. return _id;
  60. return _id;
  61. }
  62. QT_END_MOC_NAMESPACE
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I'd greatly appreciate any help at all!