Hi Vincent,
2008/4/30 Vincent Bourdier <[EMAIL PROTECTED]>:
> Hi all,
> Trying for hours to create a new geode, I'am having a bug I can't fix
>
> Doing
>
> > _root->addChild(createSun(config->Sunpath));
> >
> the program crashes
>
> This is the code of "createSun"
>
> osg::Geode* createSun(std::string texturePath)
> > {
> > int nb_edge = 30;
> > float radius = SUN_RADIUS/UNIT_METER/SUN_DIVIDER;
> > osg::Vec3 center = osg::Vec3(SUN_CENTER);
> > center.normalize();
> > center *= SUN_DISTANCE/UNIT_METER/SUN_DIVIDER;
> >
> > osg::ref_ptr<osg::Billboard> billboard = new osg::Billboard();
>
> problem is here, you create a pointer in a osg::ref_ptr,
it will be unref and deleted when you exit of the current scope (osg::Geode*
createSun(std::string texturePath) scope)
so you return a deleted pointer, and .... ARggg crach
>
> > osg::Geometry* geometry = new osg::Geometry();
> >
> >
> > osg::Vec3Array* vertices = new osg::Vec3Array();
> > osg::Vec3Array* normals = new osg::Vec3Array();
> > osg::Vec4Array* colors = new osg::Vec4Array();
> >
> > //1st point is the center of the triangle fan
> > vertices->push_back(osg::Vec3(0,0,0));
> >
> > for(int i=1; i<nb_edge; ++i)
> > {
> > vertices->push_back(osg::Vec3( radius *
> > cos(osg::DegreesToRadians(i/(float)(nb_edge/360.0f))),
> > radius *
> > sin(osg::DegreesToRadians(i/(float)(nb_edge/360.0f))),
> > .0f ));
> > }
> >
> > geometry->setVertexArray(vertices);
> >
> > normals->push_back(osg::Vec3(0,0,1));
> > geometry->setNormalArray(normals);
> > geometry->setNormalBinding(osg::Geometry::BIND_OVERALL);
> >
> > colors->push_back(osg::Vec4(1,1,0,1));
> > geometry->setColorArray(colors);
> > geometry->setColorBinding(osg::Geometry::BIND_OVERALL);
> >
> > osg::DrawElementsUShort* primitive = new
> > osg::DrawElementsUShort(osg::PrimitiveSet::TRIANGLE_FAN);
> > primitive->push_back(0);
> > for(int i=1; i<nb_edge; ++i)
> > primitive->push_back(i);
> >
> > geometry->addPrimitiveSet(primitive);
> >
> > billboard->addDrawable(geometry,center);
> > billboard->setMode(osg::Billboard::POINT_ROT_EYE);
> > center.normalize();
> > billboard->setNormal(-center);
> >
> > return billboard.get();
> >
> > }
>
>
>
> On crash it return the error:
>
> Exception non gérée à 0x10028b41 (osg25-osgd.dll) dans 3DEM.exe :
> > 0xC0000005: Violation d'accès lors de la lecture de l'emplacement 0xfeeefeee
> >
>
> Do you see any mistake ?
>
> Thanks a lot
>
> Regards,
> Vincent.
>
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>
>
Cheer
David Callu
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