在Qt 4.8中集成OGRE 1.7.3

Question

我尝试在Ubuntu上将ogre3d小部件嵌入到qt小部件中，但是我们看到黑屏。

当我们使用ogre :: Root :: RenderWindow没有父窗口小部件（作为主窗口）时，一切正常。但是当我们将ogre :: Root :: RenderWindow创建为其他主窗口的子窗口时，我们遇到食人魔无法工作。

下面是代码：

CPP：http://pastebin.com/Rbxa5btj

头：http://pastebin.com/F4w5eQ7d

Answer 1

我有这个问题，我需要调用XSync方法如下所示。这是OgreWidget::initialize方法的一部分，其中OgreWidget的子类QWidget。在分配m_OgreRoot并设置了渲染系统之后，initialize被称为OgreWidget的构造的一部分。

setAttribute(Qt::WA_PaintOnScreen, true); 
setAttribute(Qt::WA_NoSystemBackground, true); 

setFocusPolicy(Qt::StrongFocus); 

Ogre::String winHandle; 
QX11Info info = x11Info(); 
winHandle = Ogre::StringConverter::toString((unsigned long)(info.display())); 
winHandle += ":"; 
winHandle += Ogre::StringConverter::toString((unsigned int)(info.screen())); 
winHandle += ":"; 
winHandle += Ogre::StringConverter::toString((unsigned long)(winId())); 

Ogre::NameValuePairList params; 
params["parentWindowHandle"] = winHandle; 
params["FSAA"] = Ogre::String("8"); 

int w = width(); 
int h = height(); 
// Need to call XSync or the window handles will be invalid. 
XSync(info.display(), False); 
m_OgreWindow = 
     m_OgreRoot->createRenderWindow("OgreWidget_RenderWindow", 
            qMax(w, 640), qMax(h, 480), false, &params); 

这里是为Qt 5.1.0修改的相同的代码。为Qt 5.0.x删除了QX11Info，然后添加到Qt 5.1.0的“extras”组件中。新的QX11Info类只有静态方法。

#include <QtX11Extras/QX11Info> 
... 
setAttribute(Qt::WA_PaintOnScreen, true); 
setAttribute(Qt::WA_NoSystemBackground, true); 

setFocusPolicy(Qt::StrongFocus); 

Ogre::String winHandle; 
winHandle = Ogre::StringConverter::toString((unsigned long)(QX11Info::display())); 
winHandle += ":"; 
winHandle += Ogre::StringConverter::toString((unsigned int)(QX11Info::appScreen())); 
winHandle += ":"; 
winHandle += Ogre::StringConverter::toString((unsigned long)(winId())); 

Ogre::NameValuePairList params; 
params["parentWindowHandle"] = winHandle; 
params["FSAA"] = Ogre::String("8"); 

int w = width(); 
int h = height(); 
// Need to call XSync or the window handles will be invalid. 
XSync(QX11Info::display(), False); 
m_OgreWindow = 
     m_OgreRoot->createRenderWindow("OgreWidget_RenderWindow", 
            qMax(w, 640), qMax(h, 480), false, &params);