MFC opengl 鼠标旋转、平移、缩放

[manji_lee]

void CDrawCubeDemoView::OnLButtonDown(UINT nFlags, CPoint point)
{
// TODO: Add your message handler code here and/or call default
m_MouseDownPoint=point;
SetCapture();
CView::OnLButtonDown(nFlags, point);
}

void CDrawCubeDemoView::OnLButtonUp(UINT nFlags, CPoint point)
{
// TODO: Add your message handler code here and/or call default
m_MouseDownPoint=CPoint(0,0);
ReleaseCapture();
CView::OnLButtonUp(nFlags, point);
}

void CDrawCubeDemoView::OnMouseMove(UINT nFlags, CPoint point)
{

// TODO: Add your message handler code here and/or call default

//if (GetCapture()==this)
if (nFlags & MK_LBUTTON == TRUE)
{
//Increment the object rotation angles
m_xAngle+=(point.y-m_MouseDownPoint.y)/3.6;
m_yAngle+=(point.x-m_MouseDownPoint.x)/3.6;
//Redraw the view
InvalidateRect(NULL,FALSE);
//Set the mouse point
m_MouseDownPoint=point;


}
}

但是上述简单的代码，旋转效果很差，难以控制，有人用跟踪球做过opengl的旋转平移吗？求大牛指导！！

[图灵狗]

可以先按照http://nehe.gamedev.net/tutorial/lessons_01__05/22004/一步步练习。

引用 楼主 manji_lee 的回复:

void CDrawCubeDemoView::OnLButtonDown(UINT nFlags, CPoint point) { // TODO: Add your message handler code here and/or call default m_MouseDownPoint=point; SetCapture(); CView::OnLButtonDown(nFlags, point); } void CDrawCubeDemoView::OnLButtonUp(UINT nFlags, CPoint point) { // TODO: Add your message handler code here and/or call default m_MouseDownPoint=CPoint(0,0); ReleaseCapture(); CView::OnLButtonUp(nFlags, point); } void CDrawCubeDemoView::OnMouseMove(UINT nFlags, CPoint point) { // TODO: Add your message handler code here and/or call default //if (GetCapture()==this) if (nFlags & MK_LBUTTON == TRUE) { //Increment the object rotation angles m_xAngle+=(point.y-m_MouseDownPoint.y)/3.6; m_yAngle+=(point.x-m_MouseDownPoint.x)/3.6; //Redraw the view InvalidateRect(NULL,FALSE); //Set the mouse point m_MouseDownPoint=point; } } 但是上述简单的代码，旋转效果很差，难以控制，有人用跟踪球做过opengl的旋转平移吗？求大牛指导！！

[ryfdizuo]

trackball或者arcball模式，看nehe最后一课。http://www.owlei.com/DancingWind/ win32下的代码可以直接移植mfc。

[就不交话费]

请问楼主最后如何实现鼠标左键平移效果的啊？

[赵4老师]

搜网络教程“学OpenGL编3D游戏”。

[manji_lee]

轨迹球 track ball

[fly_dragon_fly]

没看到你怎么使用opengl的，效果差具体是什么？ 旋转的nehe的代码可以直接拷过来用，只不过超过窗口边界得注意一下 对于平移来说，只是把鼠标点的偏移值算回到世界坐标的偏移就可以了