MFC中OpenGL旋转的问题

要求用户不干涉的情况下让物体自由旋转，这如果用win32的sdk直接来实现的话，就像Nehe的教程上那样是比较容易做的，可以在空闲事件的情况下调用绘图部分代码；

<!--<br><br>Code highlighting produced by Actipro CodeHighlighter (freeware)<br>http://www.CodeHighlighter.com/<br><br>-->if(PeekMessage(&msg,NULL,0,0,PM_REMOVE))//IsThereAMessageWaiting?
{

TranslateMessage(&msg);//TranslateTheMessage
DispatchMessage(&msg);//DispatchTheMessage
}
else//IfThereAreNoMessages
{
DrawGLScene()；
}

但MFC中我不了解到底该怎么弄才好，起先也是想放到空闲事件处理程序中去调用绘图代码，就写了如下代码：

<!--<br><br>Code highlighting produced by Actipro CodeHighlighter (freeware)<br>http://www.CodeHighlighter.com/<br><br>-->BOOLCOpenGLDemoApp::OnIdle(LONGlCount)
{
//TODO:Addyourspecializedcodehereand/orcallthebaseclass
CFrameWnd*pw=(CFrameWnd*)AfxGetMainWnd();
((COpenGLDemoView*)pw->GetActiveView())->DrawGLScene();
returnCWinApp::OnIdle(lCount);
}

可发现效果不对劲，必须要用户的鼠标在上面滑动才会旋转，和要求完全不符合呀。于是我就换了个想法，试着用了一个定时器，让它定时刷新重绘，从而产生出旋转的效果，代码如下:

<!--<br><br>Code highlighting produced by Actipro CodeHighlighter (freeware)<br>http://www.CodeHighlighter.com/<br><br>-->intCOpenGLDemoView::OnCreate(LPCREATESTRUCTlpCreateStruct)
{
if(CView::OnCreate(lpCreateStruct)==-1)
return-1;

//TODO:Addyourspecializedcreationcodehere
HWNDhWnd=this->GetSafeHwnd();
HDChDC=::GetDC(hWnd);

if(this->SetWindowPixelFormat(hDC)==FALSE)
{//设置像素格式
return0;
}
if(this->CreateViewGLContext(hDC)==FALSE)
{//创建RC并选为所用
return0;
}
if(!this->InitGL())
{//初始化openGL
return0;
}
this->SetTimer(1,10,NULL);
return0;
}
voidCOpenGLDemoView::OnPaint()
{
CPaintDCdc(this);//devicecontextforpainting
this->DrawGLScene();
}
voidCOpenGLDemoView::OnTimer(UINTnIDEvent)
{
//TODO:Addyourmessagehandlercodehereand/orcalldefault
//控制旋转角度
rTri+=1.2f;
if(rTri>=360.0f)
{
rTri-=360.0f;
}
rQuads-=1.15f;
if(rQuads<=-360.0f)
{
rQuads+=360.0f;
}

InvalidateRect(NULL,FALSE);//角度更新了，通知其重绘
CView::OnTimer(nIDEvent);
}
intCOpenGLDemoView::DrawGLScene()
{//Here'sWhereWeDoAllTheDrawing
glClear(GL_COLOR_BUFFER_BIT|GL_DEPTH_BUFFER_BIT);//ClearScreenAndDepthBuffer
glShadeModel(GL_SMOOTH);
glLoadIdentity();//ResetTheCurrentModelviewMatrix
glTranslatef(-1.5f,0.0f,-6.0f);//物体左移1.5,向内移6,相当于移动镜头一样，让物体进入镜头中
glRotatef(rTri,0.0f,1.0f,0.0f);
glBegin(GL_TRIANGLES);//绘制三角形
glColor3f(1.0f,0.0f,0.0f);
glVertex3f(0.0f,1.0f,0.0f);//上顶点
glColor3f(0.0f,1.0f,0.0f);
glVertex3f(-1.0f,-1.0f,0.0f);//左下
glColor3f(0.0f,0.0f,1.0f);
glVertex3f(1.0f,-1.0f,0.0f);//右下
glEnd();//三角形绘制结束
glShadeModel(GL_FLAT);
glLoadIdentity();
glTranslatef(1.5f,0.0f,-6.0f);
glRotatef(rQuads,1.0f,0.0f,0.0f);
glBegin(GL_QUADS);//绘制正方形
glColor3f(1.0f,0.0f,0.0f);
glVertex3f(-1.0f,1.0f,0.0f);//左上
glColor3f(1.0,1.0f,1.0f);
glVertex3f(-1.0f,-1.0f,0.0f);//右下

glColor3f(0.0f,0.0f,1.0f);
glVertex3f(1.0f,-1.0f,0.0f);//左下
glColor3f(0.0f,1.0f,0.0f);
glVertex3f(1.0f,1.0f,0.0f);//右上
glEnd();//正方形绘制结束
glFlush();
rTri+=1.2f;
if(rTri>=360.0f)
{
rTri-=360.0f;
}
rQuads-=1.15f;
if(rQuads<=-360.0f)
{
rQuads+=360.0f;
}
HWNDhWnd=this->GetSafeHwnd();
HDChDC=::GetDC(hWnd);
SwapBuffers(hDC);
returnTRUE;//EverythingWentOK
}

这下旋转的效果是有的，但由于是强制其重绘，所以画面刷新不过来，即使我用了双缓冲，画面还是闪烁得很。这个问题困惑了我一晚上，到底应该怎么弄呢？