用優秀的UI庫Qt試驗下 ^_^，折騰了接近一天，才能畫出來，但是動畫不動。
截圖：
現在的問題是只有“臟”了才畫，也就是才去調用如下的method；不是三角形沒動，是動了但是沒畫出來，我們看不見。
void QD3DWidget::paintEvent( QPaintEvent* )
{
if (updatesEnabled())
{
d3dDraw();
}
}
用個timer去解決這個問題？
這老外的帖子對我幫助很大，不搞下面的兩條整個QD3DWidget都看不到:
Using Direct3D 9 with Qt - flicker problem
According to the Qt docs, if you want to use GDI or Direct3D on Windows with Qt, you need to:
1) Override
QWidget::paintEngine to return NULL
2) Call
QWidget::setAttribute(Qt::WA_PaintOnScreen, true) 
部分代碼：
HRESULT InitD3D( HWND hWnd )
{
// Create the D3D object.
if( NULL == ( g_pD3D = Direct3DCreate9( D3D_SDK_VERSION ) ) )
return E_FAIL;
// Set up the structure used to create the D3DDevice
D3DPRESENT_PARAMETERS d3dpp;
ZeroMemory( &d3dpp, sizeof(d3dpp) );
d3dpp.Windowed = TRUE;
d3dpp.SwapEffect = D3DSWAPEFFECT_DISCARD;
d3dpp.BackBufferFormat = D3DFMT_UNKNOWN;
// Create the D3DDevice
if( FAILED( g_pD3D->CreateDevice( D3DADAPTER_DEFAULT, D3DDEVTYPE_HAL, hWnd,
D3DCREATE_SOFTWARE_VERTEXPROCESSING,
&d3dpp, &g_pd3dDevice ) ) )
{
return E_FAIL;
}
// Turn off culling, so we see the front and back of the triangle
// 關閉剔除，以便三角形的前后都能被我們看到
g_pd3dDevice->SetRenderState( D3DRS_CULLMODE, D3DCULL_NONE );
// Turn off D3D lighting, since we are providing our own vertex colors
// 關閉D3D光照，因為我們提供我們自己的頂點顏色
g_pd3dDevice->SetRenderState( D3DRS_LIGHTING, FALSE );
return S_OK;
}
QD3DWidget.h
#ifndef QD3DWIDGET_H
#define QD3DWIDGET_H
#include <QWidget>
class QD3DWidget : public QWidget
{
Q_OBJECT
public:
QD3DWidget(QWidget *parent = 0);
~QD3DWidget();
//QSize minimumSizeHint() const;
//QSize sizeHint() const;
QPaintEngine *paintEngine() const;
protected:
virtual void initializeD3D();
virtual void paintD3D();
void paintEvent(QPaintEvent*);
virtual void d3dInit();
virtual void d3dDraw();
bool initialized() const{ return m_bInit; }
private:
bool m_bInit;
};
#endif // QD3DWIDGET_H
QD3DWidget.cpp
#include "QD3DWidget.h"
#include "Matrices.h"
QD3DWidget::QD3DWidget(QWidget *parent)
: QWidget(parent)
, m_bInit(false)
{
resize(QSize(400, 300));
setAttribute(Qt::WA_PaintOnScreen, true);
}
QD3DWidget::~QD3DWidget()
{
}
void QD3DWidget::initializeD3D()
{
InitD3D(/*this->topLevelWidget()->*/winId());
InitGeometry();
m_bInit = true;
}
void QD3DWidget::paintD3D()
{
// lyl: 真正要畫的東西放這兒
Render();
}
void QD3DWidget::paintEvent( QPaintEvent* )
{
if (updatesEnabled())
{
d3dDraw();
}
}
void QD3DWidget::d3dInit()
{
initializeD3D();
}
void QD3DWidget::d3dDraw()
{
if (!initialized())
{
d3dInit();
}
paintD3D();
}
//QSize QD3DWidget::minimumSizeHint() const
//{
// return QSize(50, 50);
//}
//
//QSize QD3DWidget::sizeHint() const
//{
// return QSize(200, 200);
//}
QPaintEngine * QD3DWidget::paintEngine() const
{
return NULL;
}
2008-11-26 PM 21:30 用個timer讓動畫顯示出來了，每隔20ms就強制畫一下，參考了Qt 的例子opengl/textures
QTimer *timer = new QTimer(this);
connect(timer, SIGNAL(timeout()), this, SLOT(rotateOneStep()));
timer->start(20);
2010-09-06 AM 2:55 【重劍注：時光匆匆，竟然已是快過去兩年了！今日看了下Ogitor的代碼，0.4.2版本看起來已是相當完善，電腦上有0.3的代碼，隨便看下其render loop】
Ogitor 0.3里面也是用的Timer的方式
MainWindow.cpp MainWindow的構造函數中
mTimer = new QTimer(this);
mTimer->setInterval(0);
connect(mTimer, SIGNAL(timeout()), this, SLOT(timerLoop()));
mTimer->start();
看timerLoop的代碼，可知窗口不最小化時，setInterval為50.
void MainWindow::timerLoop()
{
if(mHasFileArgs)
{
if(mOgreWidget->mOgreInitialised)
{
OgitorsRoot::getSingletonPtr()->LoadScene(mArgsFile.toStdString());
mHasFileArgs = false;
mOgreWidget->setDoLoadFile(false);
}
}
if(isMinimized())
{
if(mTimer->interval() != 200)
mTimer->setInterval(200);
return;
}
else
{
if(mTimer->interval() != 50)
mTimer->setInterval(50);
}
updateActions();
if(OgitorsRoot::getSingletonPtr()->IsSceneLoaded())
{
mOgreWidget->ProcessKeyActions();
}
LogDataVector messages;
LOGBUFFER.getBuffer(messages);
for(unsigned int i = 0;i < messages.size();i++)
{
updateLog(new QListWidgetItem(messages[i].mMessage, 0, messages[i].mLevel) );
}
if(messages.size() > 0)
logWidget->scrollToBottom();
}
不過這個timerLoop里面沒有渲染的代碼啊！改天再看了！睡覺！
ogrewidget.hxx
public Q_SLOTS:
void timerLoop();
ogrewidget.cpp
void OgreWidget::timerLoop()
{
if(mOgitorMainWindow->isMinimized())
return;
if(mRenderStop)
{
if(QMessageBox::information(this,"qtOgitor", tr("Render Device is Lost! Please click ok to continue.."), QMessageBox::Ok) == QMessageBox::Ok)
mRenderStop = false;
}
update();
}