PxContactPair's contact data not available (PhysX 3.2.4) [SOLVED]

Gaming and Visualization Technologies APIs Physics Modeling (closed)
1

Hello
On contact notification, I need to have the average position of contact :

virtual void onContact(const PxContactPairHeader &  pairHeader,const PxContactPair * pairs,PxU32 nbPairs)
{
	for (PxU32 i=0;i<nbPairs;i++)
	{
		PxVec3 position=getAverageContactPosition(pairs[i]);
		//...

	}
}

PxVec3 getAverageContactPosition(const PxContactPair & pairs)
{
	PxContactPairPoint * contacts=new PxContactPairPoint[pairs.contactCount];
	pairs.extractContacts(contacts,pairs.contactCount*sizeof(PxContactPairPoint));

	PxVec3 acc=PxVec3(static_cast<PxReal>(0.0f),static_cast<PxReal>(0.0f),static_cast<PxReal>(0.0f));

	for (PxU16 i=0;i<pairs.contactCount;i++)
		acc+=contacts[i].position;

	delete [] contacts;

	return acc/pairs.contactCount;
}

…but pairs.contactCount is always 0 and pairs.contactStream is always NULL.
Why ?

2

Hi,
Are you running a CHECKED build? Are there any warnings on the error stream? And what is the value of nbPairs?
Thanks,
Mike

3

Hello Mike
Thank you for your answer
In fact this is just a stupid mistake, I forgot to raise PxPairFlag::eNOTIFY_CONTACT_POINTS in the filter shader …