I had the same problems a time ago - try:
QApplication *qApp;
QString QString::null="";
QStringData *QString::shared_null=0;
QWidget *QApplication::main_widget = 0;
int main( int argc, char **argv )
{
QApplication a( argc, argv );
qApp = &a;
....
Dieter
Unclassified Mail
-------------------------
-----Original Message-----
From: [EMAIL PROTECTED]
[mailto:[EMAIL PROTECTED] Behalf Of benny porat
Sent: Thursday, 16 November, 2006 15:49
To: osg users
Subject: Re: [osg-users] GUI
I found this toturial
http://doc.trolltech.com/3.3/tutorial1-01.html
I try to compile it (I work with eclipse)
and I get error that I dont understand what to do
I gat error for every kine in the main:
undefind reference to 'QString::shared_null....
.
.
undefind reference to 'QApplication::QApplication(int&,char **)'
...
and so on...
I think that it something with the configure of the build?
do you know what I need to do?
thanks
NB
On 11/16/06, Robert Osfield <[EMAIL PROTECTED]> wrote:
Hi Garret,
On 11/16/06, Garrett Potts <[EMAIL PROTECTED]> wrote:
> I am not sure of other peoples experiences. The visualization system
I am
> running based on OSG is very smooth on the Qt 4.1.4 version but when I
> upgraded to 4.2 and without changing a line of code and just do a
re-compile
> the scene became very Jerky. Playing with Qt's timer interval it
became
> better but never looked into it further.
>
> Not sure if this information is useful but I am also curious if others
have
> experienced similar problems.
I haven't seen this, but it sounds like the timer has been given a
lower priority or simply implemented differently.
Using GUI timers to drive redraws isn't ideal, for solid framerates
you really need to run a separate graphics thread. For any serious
vis-sim work this is essential. For interactive apps GUI timers will
often suffice, but as you've found out you are at the mercy of the
Windowing toolkits implementation of its timers.
Robert.
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