Hi,
I am trying to make a scene with a Helicopter flying over a terrain and with
the option to change its course or stop it in real time. I have been looking
tutorial 8, and I have tried to do a modification to rotate tank instead the
two DOF nodes. Here is the code, i have GTKviewer but it is possible to do with
classic viewer.
Tuto_8.cpp
#include < osg/Group>
#include < osg/Node>
#include < osgDB/ReadFile>
#include < osgViewer/Viewer>
#include < osgSim/DOFTransform>
#include < osgSim/MultiSwitch>
#include < osgGA/TrackballManipulator>
#include "tankDataType.h"
#include "tankNodeCallback.h"
#include < gtk/gtk.h>
#include < ViewerGtk.h>
int main()
{
osg::Node* tankNode = NULL;
osg::Group* root = new osg::Group();
osgViewer::ViewerGtk viewer;
tankNode = osgDB::readNodeFile("./models/t72-tank_des.flt");
root->addChild(tankNode);
tankDataType* tankData = new tankDataType(tankNode);
tankNode->setUserData( tankData );
tankNode->setUpdateCallback(new tankNodeCallback);
osgGA::TrackballManipulator *Tman = new osgGA::TrackballManipulator();
viewer.setUpViewInWindow( 100, 100, 800, 650 );
viewer.setSceneData( root );
viewer.realize();
viewer.setCameraManipulator( Tman );
while( !viewer.done() )
{
viewer.frame();
}
}
tankDataType.cpp
#include "tankDataType.h"
tankDataType::tankDataType(osg::Node* n)
{
rotation = 0;
tank = dynamic_cast< osgSim::DOFTransform*> (n);
}
void tankDataType::updateTurretRotation()
{
rotation -= 0.01;
tank->setCurrentHPR( osg::Vec3(rotation,0,0) );
}
tankDataType.h
#ifndef _TANKDATATYPE_H_
#include < osgSim/DOFTransform>
#include < osgSim/MultiSwitch>
class tankDataType : public osg::Referenced
{
public:
tankDataType(osg::Node* n);
void updateTurretRotation();
protected:
osgSim::DOFTransform* tank;
double rotation;
};
#endif
tankNodeCallBack.h
#ifndef _TANKNODECALLBACK_H_
class tankNodeCallback : public osg::NodeCallback
{
public:
virtual void operator()(osg::Node* node, osg::NodeVisitor* nv)
{
osg::ref_ptr<tankDataType> tankData = dynamic_cast<tankDataType*>
(node->getUserData() );
if(tankData != NULL)
{
tankData->updateTurretRotation();
}
traverse(node, nv);
}
};
#endif
The code compiles but when run it gives the following error:
Program received signal SIGSEGV, Segmentation fault.
[Switching to Thread 0xb5ae2a60 (LWP 502)]
tankDataType::updateTurretRotation (this=0x962b410) at
/usr/local/include/osgSim/DOFTransform:48
48 void setCurrentHPR(const osg::Vec3& hpr) {_currentHPR = hpr;
dirtyBound(); }
Any help is welcome!!!
Thank you!
Cheers,
Felipe
------------------
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http://forum.openscenegraph.org/viewtopic.php?p=18779#18779
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