CGAL users discussion list

[Kwok Jasper <>]

Thank you.

May I ask wich file I should look at in the directory Triangulation_2 ?
I am sorry that my qestion here may be a bit silly but since I am a beginner of CGAL. I find it very difficult to understand all of the code in every files there at once.
Therefore, may I ask which .cpp file there I may reference to know the way to display a triangulation?

In addition, may I clarify if 3D triangulation can also be displayed in QGraphicsView or QGLViewer?
If it cannot, then may I ask what may I do to display 3D triangulation then?
 
Thank you very much for your help.
 
Yours faithfully
Jasper  
 

> Date: Fri, 26 Dec 2008 18:00:36 +0100
> From:
> To:
> Subject: Re: [cgal-discuss] about using Qt4.4.3 with CGAL3.4 beta version
>
> Hi Jasper,
>
> Please have a look at CGAL-3.4/demo/Triangulation_2
>
> best,
>
> andreas
>
> Kwok Jasper wrote:
> > Thank you very much for your reply.
> >
> > May I ask if there is any example for displaying a triangulation with
> > the QGraphicsView or QGLViewer?
> > Is there any demonstration of displaying a triangulation using the above
> > two structure?
> >
> > THank you very much for your attention
> >
> >
> >
> > > Date: Fri, 26 Dec 2008 16:13:42 +0100
> > > From:
> > > To:
> > > Subject: Re: [cgal-discuss] about using Qt4.4.3 with CGAL3.4 beta version
> > >
> > > Hi Jasper,
> > >
> > > Note that for the Qt based demos we are in a transition phase
> > > as we haven't rewritten all Qt3 based demos for Qt4.
> > >
> > > When you see CGAL::Qt_widget used, it is a demo that needs Qt3
> > >
> > > The Qt4 based demos use the QGraphicsView as widget, or the
> > > QGLViewer (independent from Qt4, but based on it as well.
> > >
> > > Sorry for this confusion,
> > >
> > > andreas
> > >
> > >
> > > Kwok Jasper wrote:
> > > > Excuse me, may I ask if it is that when I use the newly released
> > CGAL3.4
> > > > beta version, I should no longer use the Qt in the way that the code I
> > > > pasted in the previous does?
> > > > If it is the case, may I ask if th ere is any example demonstrating
> > how
> > > > to use Qt4 to display a triangulation generated by the CGAL3.4 beta
> > > > version ?
> > > >
> > > > Thnak you very much
> > > >
> > > >
> > ------------------------------------------------------------------------
> > > > From:
> > > > To:
> > > > Date: Fri, 26 Dec 2008 12:44:05 +0800
> > > > Subject: [cgal-discuss] about using Qt4.4.3 with CGAL3.4 beta version
> > > >
> > > > Excuse me, may I ask something about using Qt4.4.3 with CGAL3.4 beta
> > > > version in Microsoft Visual C++ 2005?
> > > >
> > > > I have used nmake to compile the Qt4
> > > > Then, I set the following in Visual C++ 2005:
> > > >
> > > > In Tools->Options->Projects and Solutions->VC++ Directories->Include
> > > > files, I added
> > > > $(QTDIR)\include
> > > >
> > > >
> > > > In Tools->Options->Projects and Solutions->VC++ Directories->Library
> > > > files, I added
> > > > $(QTDIR)\lib
> > > >
> > > > In Tools->Options->Projects and Solutions->VC++ Directories->Source
> > > > files, I added
> > > > $(QTDIR)\src
> > > >
> > > > However, after that, when I tried to compile the following code
> > from the
> > > > CGAL web site, I still have error.
> > > > May I ask have I missed any steps in the configuration with the Qt?
> > > > Thank you very much
> > > >
> > > >
> > > > #include <CGAL/basic.h>
> > > >
> > > >
> > > > #include <iostre am>
> > > > int main(int, char*){
> > > > std::cout << "Sorry, this demo needs QT..." << std::endl; return 0;}
> > > > #include <CGAL/Cartesian.h>
> > > > #include <CGAL/Delaunay_triangulation_2.h>
> > > > #include <CGAL/IO/Qt_widget_Tr iangulation_2.h>
> > > > #include <CGAL/IO/Qt_widget.h>
> > > > #include <qapplication.h>
> > > > #include <qmainwindow.h>
> > > >
> > > > typedef CGAL::Cartesian<double> K;
> > > > typedef K::Point_2 Point_2;
> > > > typedef CGAL::Delaunay_triangulation_2<K> Delaunay;
> > > >
> > > > Delaunay dt;
> > > >
> > > > class My_window : public QMainWindow {
> > > > Q_OBJECT
> > > > public:
> > > > My_window(int x, int y)
> > > > {
> > > > widget = new CGAL::Qt_widget(this);
> > > > widget->resiz e(x,y);
> > > > widget->set_window(0, x, 0, y);
> > > >
> > > > connect(widget, SIGNAL(redraw_on_back()),
> > > > this, SLOT(redraw_win()));
> > > >
> > > > connect(widget, SIGNAL(s_mousePressEvent(QMouseEvent*)),
> > > > this, SLOT(mousePressEvent(QMouseEvent*)));
> > > >
> > > > setCentralWidget(widget);
> > > > ; };
> > > > private slots:
> > > > void redraw_win()
> > > > {
> > > > *widget << dt;
> > > > }
> > > >
> > > > void mousePressEvent(QMouseEvent *e)
> > > > {
> > > > dt.insert(Point_2(widget->x_real(e->x()), widget->y_real(e->y())));
> > > > widget->redraw();
> > > > }
> > > >
> > > > private: // private data member
> > > > CGAL::Qt_widget* widget;
> > > > };
> > > >
> > > > //moc_source_file : tutorial2.cpp
> > > > #include "tutorial2.moc"
> > > >
> > > > int main( int argc, char **argv )
> > > > {
> > > > QApplicatio n app( argc, argv );
> > > > My_window *w = new My_window(400,400);
> > > > app.setMainWidget( w);
> > > > w->show();
> > > > return app.exec();
> > > > }
> > > >
> > > >
> > ------------------------------------------------------------------------
> > > > <http://>
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> > ----------------------------------------------------------------------
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