Hello,
Kazuhiko Kido wrote:
>>> Adding a call to dInitODE() at the top of main in the two test programs
>>> makes them work for me.
> i have already added a dInitODE at the top of main.
did you put it before the call to osgInit() ?
> For debug, i made contrib/physics and OSGBaseLib libraries on VC2008.
> I tried to add only three of the following codes in the OpenSG sample program
> run correctly before i made, and linked these debug library.
> Then duplicate the behavior.
>
> 1. #include <OSGPhysics.h>
> 2. Add "dInitODE();" at top of the main
> 3. Add "PhysicsHandlerPtr physHandler = PhysicsHandler::create();" at
> middle of the main
>
>
> following is the stack when the test application is crashed.
>
> osgInit (OSGBaseFunctions.cpp:line 303)
> returnValue &= (*osgInitFunctions)[i](); (OSGBaseFunctions.cpp:line 454)
> PhysicsBoxGeomBase::createEmpty (OSGPhysicsBoxGeomBase.inl:line 87)
> newPtr(returnValue); (OSGPhysicsBoxGeomBase.inl:line 91)
> result->onCreate(); (OSGFieldContainerImpl.inl:line 253)
> PhysicsBoxGeom::onCreate (OSGPhysicsBoxGeom.cpp:line 79)
> PhysicsBoxGeomBase::setLenghts(tmpPtr->getLenghts());
> (OSGPhysicsBoxGeom.cpp:line 83)
> dGeomBoxGetLengths(tmpPtr->id, t); (OSGPhysicsBoxGeom.cpp:line 99)
> return Vec3f(t[0], t[1], t[2]); (OSGPhysicsBoxGeom.cpp:line 100)
> <===== t[0] overflow!!(-1.#QNAN00) This is the reason of crash.
> Question:
> 1. "PhysicsBoxGeomBase::createEmpty" is called as initial function. Is it
> right? I don't use "PhysicsBoxGeomBase" in source code.
yes, for almost all OpenSG objects there is a *Base class, it is
generated from a description in the .fcd files in the OpenSG source tree
and contains all the boilerplate code.
One thing that is ensured by this code is that when osgInit runs a
prototype instance for every type is created from which all "user"
instances are cloned. The call stack you posted seems to imply that the
crash happens during the prototype creation/initialization (which is
triggered from osgInit). Since the PhysicsBoxGeom makes calls to ODE
during its prototype initialization, ODE must be initialized before
OpenSG, i.e. the call dInitODE must be before osgInit.
> 2. If this function call is valid, the reason why such a overflow occurs? and
> how to avoid this?
if t contains garbage values it seems the ODE call dGeomBoxGetLengths
did fail, I'm guessing because ODE is not initialized?
> The number of initial function (osgInitFunctions) is 6. Strangely enough,
> even if the physics library class is not used in a source code, then the
> number of initial function is still 6.
The physics library does not register an init function, so the number is
not changed.
> My developing environment is VC2008(not SP1), so i try to install VC2008 SP1
> and try again.
hm, not sure if that is a problem, but it shouldn't hurt either ;)
Cheers,
Carsten
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