Hi Smilen,
On Thu, 2005-12-01 at 20:32 +0100, Smilen Dimitrov wrote:
>
> First of all, thanks for the reply !! :)
that's part of what we're here for. ;)
> Thanks for this - I tried to mess with WinDbg a little, and I managed
> to get, I
> hope, a more meaningful stack trace. I use the Call Stack window in
> WinDbg, and
> for some reason I had to enter the start directory as well whenever I
> wanted to
> open an executable.. The symbols were missing, I tried entering the paths for
> the compiled libs for both VR Juggler and OpenSG but then it still complains -
Hm, that's weird. Not sure what you need to do to make it work right, I
only use Windows if I really can't avoid it.
> though in the end, I got to the following call stack trace from when the
> example crashes:
>
> http://www.smilen.net/VolrenJuggler/DebugTrace01.txt
>
> The same text file has the call stack for the corresponding point (I guess) in
> the non crashing simple volume render example.
>
> From what I can see, when the time comes for the volume to be rendered,
> OSGSystemD!osg::DVRVolume::draw is called, and as part of that it iterates
> through OSGSystemD!osg::FieldContainerPtr::FieldContainerPtr, and when
> it comes
> to OSGSystemD!osg::FieldContainerPtrBase::FieldContainerPtrBase+0x29 it
> crashes
> (the non crashing OpenSG volume example simply continues beyond this point
> iterating through further FieldContainerPtr-s).
Looking at the code the VolRen assumes that the Camera always has a
beacon, which is not the case for a VRJuggler application. I committed a
fix, and attached a patch if you want to try it yourself, otherwise
you'll have to wait for the next dailybuild to have it.
I hope this will fix it.
Yours
Dirk
The patch:
diff -u -3 -p -r1.1 OSGDVRVolume.cpp
--- OSGDVRVolume.cpp 28 Jan 2004 01:10:23 -0000 1.1
+++ OSGDVRVolume.cpp 2 Dec 2005 18:10:11 -0000
@@ -417,10 +417,12 @@ Action::ResultE DVRVolume::draw(DrawActi
}
// sort bricks
- Vec3f eyePointWorld;
+ Vec3f eyePointWorld(0.f, 0.f, 0.f);
- eyePointWorld.setValue(
- action->getCamera()->getBeacon()->getToWorld()[3]);
+ action->getCameraToWorld().mult(eyePointWorld);
+
Matrix modelMat = action->getActNode()->getToWorld();
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