character demo crashes in ubuntu

[uppzab]

Hello..

The character demo crashes in ubuntu when the character collides with a dynamic object and prints out the following message.

CharacterDemo: ./src/LinearMath/btQuaternion.h:188: btQuaternion& btQuaternion::operator/=(const btScalar&): Assertion `s != btScalar(0.0)' failed.
Aborted

This does not happen in windows. Why is it crashing and how can it be fixed? Does it have anything to do with floating point precision?

Thanks

[ZeroSigma]

Hehe, Im getting exactly the same exception except that I am using windows xp sp 3 and compiled the demo in Debug in MSVC 9. I've done a bit of a trace through the code and found that in the btCollisionDispatcher::defaultNearCallback() function btCollisionObject* colObj1's m_worldTransform is invalid, all float values are -1.#IND which causes the assertion. Further tracing upward would just cause me serious head trauma so please can anyone tell me and uppzab what is going on?

[uppzab]

Hello..

I compiled using BT_USE_DOUBLE_PRECISION, and it still crashes with the same error in linux
However in windows it does not crash using floating or double precision. I have not tried it in debug mode in windows. Will try it and see what happens.


Please someone shed some light..

[uppzab]

well i am using visual studio 2005/ version 8 and it does not crash in debug mode..!!

[ZeroSigma]

People mention in this thread they also have the same problem. http://www.bulletphysics.com/Bullet/php ... f=9&t=3007

[ZeroSigma]

Ok I think I've solved it, all you have to do is change the code on line 87 of the CharacterDemo.cpp file from

Code: Select all

m_ghostObject->setCollisionFlags (btCollisionObject::CF_CHARACTER_OBJECT);

to

Code: Select all

m_ghostObject->setCollisionFlags (btCollisionObject::CF_KINEMATIC_OBJECT);

I've compiled it and its working.

[uppzab]

thanks a lot Zero Sigma.. it works!!