So now I was able to replicate it again with a slightly different case.
I tracked it down to a problem with the ChangeContainers but I am
still not completely sure why it was happening.
The "fix" is here: http://opensg.vrsource.org/trac/changeset/600
The application I used to test it is attached (a modified 10loading.cpp
that reloads the model each frame as part of the display update and
deletes the old model). If you want the sample file we used to
replicate the problem, just let me know and I can send it.
-Allen
Allen Bierbaum wrote:
Gerrit Voss wrote:
Hi,
On Sat, 2007-03-10 at 11:53 -0600, Allen Bierbaum wrote:
I have been tracking down some bugs in an application so I am sprinkling
commitChanges() calls throughout my code. I know that sounds a bit
imprecise, but we have found it to be the best way to find some bugs in
OpenSG2 right now.
Anyway... I just ran into a bug. When I run the following code it
segfaults in the first few (2-5) iterations through the loop.
I'm at 500 iterations right now and it is still running (Linux FC6,
tie.wrl).
Could you give a few more hints what exactly your test looks like.
I can't replicate it either right now. Maybe it was phantom code. :)
I will keep trying and see if I can get some failing code to send you.
Thanks,
Allen
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// OpenSG Tutorial Example: Loading
//
// This example shows how to load a scene file using OpenSG.
// The supported formats right now are VRML97, OBJ, OFF and RAW, so just
// calling this program with a scene file as a parameter should load the scene
// file.
//
// Headers
#include <OpenSG/OSGGLUT.h>
#include <OpenSG/OSGConfig.h>
#include <OpenSG/OSGSimpleGeometry.h>
#include <OpenSG/OSGGLUTWindow.h>
#include <OpenSG/OSGSimpleSceneManager.h>
#include <OpenSG/OSGAction.h>
// New Headers
// the general scene file loading handler
#include <OpenSG/OSGSceneFileHandler.h>
#include <boost/bind.hpp>
// Activate the OpenSG namespace
OSG_USING_NAMESPACE
// The SimpleSceneManager to manage simple applications
SimpleSceneManager *mgr;
std::string gFileName;
GroupNodePtr gScene;
// forward declaration so we can have the interesting stuff upfront
int setupGLUT( int *argc, char *argv[] );
// helper class to find a named node
// names are handled as simple attachments, get the header for that
#include <OpenSG/OSGSimpleAttachments.h>
// There are two convenience functions for name access: getName() and
// setName(). For details about general attachment handling see the
// attachments tutorial
class NamedNodeFinder
{
public:
NamedNodeFinder(void) : _name(), _found() {}
NodePtr operator() (NodePtr root, std::string name)
{
_name=&name;
_found=NullFC;
TraverseEnterFunctor enter =
boost::bind(&NamedNodeFinder::check, this, _1);
traverse(root, enter);
return _found;
}
static NodePtr find(NodePtr root, std::string name)
{
NamedNodeFinder f;
return f(root,name);
}
private:
Action::ResultE check(NodePtr node)
{
if(getName(node) && *_name == getName(node))
{
_found = node;
return Action::Quit;
}
return Action::Continue;
}
NodePtr _found;
std::string *_name;
};
// Initialize GLUT & OpenSG and set up the scene
int main(int argc, char **argv)
{
// OSG init
osgInit(argc,argv);
// GLUT init
int winid = setupGLUT(&argc, argv);
// the connection between GLUT and OpenSG
GLUTWindowPtr gwin= GLUTWindow::create();
gwin->setId(winid);
gwin->init();
// load the scene
gScene = GroupNodePtr::create();
if(argc < 2)
{
FWARNING(("No file given!\n"));
FWARNING(("Supported file formats:\n"));
std::list<const char*> suffixes;
SceneFileHandler::the()->getSuffixList(suffixes);
//SceneFileHandler::the()->print();
for(std::list<const char*>::iterator it = suffixes.begin();
it != suffixes.end();
++it)
{
FWARNING(("%s\n", *it));
}
//scene = makeTorus(.5, 2, 16, 16);
NodeRefPtr model = NodeRefPtr(makeSphere(6,4));
SceneFileHandler::the()->write(model, "/var/tmp/sphere.osb");
gScene.node()->addChild(model);
}
else
{
/*
All scene file loading is handled via the SceneFileHandler.
*/
NodeRefPtr model = NodeRefPtr(SceneFileHandler::the()->read(argv[1]));
gFileName = std::string(argv[1]);
gScene.node()->addChild(model);
}
NodePtr found;
NamedNodeFinder f;
commitChanges();
// create the SimpleSceneManager helper
mgr = new SimpleSceneManager;
// tell the manager what to manage
mgr->setWindow(gwin );
mgr->setRoot (gScene.node());
// show the whole scene
mgr->showAll();
// GLUT main loop
glutMainLoop();
return 0;
}
//
// GLUT callback functions
//
// redraw the window
void display(void)
{
static int i=0;
i++;
// Load the geom again under the scene and delete the other one
std::cerr << i << ": ============================================" << std::endl;
std::cerr << " ----- sub child: -----------" << std::endl;
NodeRefPtr old_child( gScene.node()->getChild(0) );
gScene.node()->subChild(0);
//Thread::getCurrentChangeList()->dump();
std::cerr << "--------> Commit" << std::endl;
commitChanges();
std::cerr << " -------- load/add child: -----------" << std::endl;
NodeRefPtr model = NodeRefPtr(SceneFileHandler::the()->read(gFileName.c_str()));
gScene.node()->addChild(model);
//Thread::getCurrentChangeList()->dump();
std::cerr << "--------> Commit" << std::endl;
commitChanges();
mgr->idle();
mgr->redraw();
}
// react to size changes
void reshape(int w, int h)
{
mgr->resize(w, h);
glutPostRedisplay();
}
// react to mouse button presses
void mouse(int button, int state, int x, int y)
{
if (state)
mgr->mouseButtonRelease(button, x, y);
else
mgr->mouseButtonPress(button, x, y);
glutPostRedisplay();
}
// react to mouse motions with pressed buttons
void motion(int x, int y)
{
mgr->mouseMove(x, y);
glutPostRedisplay();
}
// react to keys
void keyboard(unsigned char k, int , int )
{
switch(k)
{
case 27:
{
OSG::osgExit();
exit(0);
}
break;
case 'f':
{
mgr->setNavigationMode(Navigator::FLY);
}
break;
case 't':
{
mgr->setNavigationMode(Navigator::TRACKBALL);
}
break;
}
}
// setup the GLUT library which handles the windows for us
int setupGLUT(int *argc, char *argv[])
{
glutInit(argc, argv);
glutInitDisplayMode(GLUT_RGB | GLUT_DEPTH | GLUT_DOUBLE);
int winid = glutCreateWindow("OpenSG");
glutReshapeFunc(reshape);
glutDisplayFunc(display);
glutIdleFunc(display);
glutMouseFunc(mouse);
glutMotionFunc(motion);
glutKeyboardFunc(keyboard);
return winid;
}
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