physx2.8.4 NX_CLF_HARDWARE

Gaming and Visualization Technologies APIs Physics Modeling (closed)
1

I try to use GPU accerlation,
I set "SDKDesc.flags &= ~NX_SDKF_NO_HARDWARE;" when I created my SDK and used
NxHWVersion hwCheck = gPhysicsSDK->getHWVersion();
if (hwCheck == NX_HW_VERSION_NONE)
{
cout<<"\nWarning: Unable to find a PhysX card, the cloth will be simulated in software.\n\n";
}
to check if GPU is set or not. then I create a cloth fall down because of gravity.
I set
"NxClothDesc desc;
desc.flags |= NX_CLF_VISUALIZATION ;
desc.flags |= NX_CLF_BENDING;
desc.flags |= NX_CLF_HARDWARE;"

if I don’t set "desc.flags |= NX_CLF_HARDWARE;", Everything is fine. the cloth fall down and stay on the ground, but if I set "desc.flags |= NX_CLF_HARDWARE;" it will hit ground then it rebound to very high altitude and disappear. It seems very strange, What happen in my program?

2

You might want to look at the SampleCloth to copy the HW cloth properties. Hooking up to PVD is useful to track what’s going with your cloth.

3

The HW cloth properties I find from SampleCloth are

NxPhysicsSDKDesc desc;
        desc.gpuHeapSize = 8;
	desc.meshCacheSize = 0;
	desc.flags &= ~NX_SDKF_NO_HARDWARE;
	NxSDKCreateError errorCode = NXCE_NO_ERROR;

#if !defined(NX_DISABLE_HARDWARE) && !defined(_XBOX) && !defined(__CELLOS_LV2__)
	NxHWVersion hwCheck = gPhysicsSDK->getHWVersion();
	if (hwCheck == NX_HW_VERSION_NONE) 
	{
		printf("\nWarning: Unable to find a PhysX card, the cloth will be simulated in software.\n\n");
		gHardwareSimulation = false;
	}
#endif

and set flag NX_CLF_HARDWARE when I create cloth

if (gHardwareSimulation)
	clothDesc.flags |= NX_CLF_HARDWARE;

Anything missed?