Initial commit:

PhysX 3.4.0 Update @ 21294896
APEX 1.4.0 Update @ 21275617

[CL 21300167]

1 files changed, 261 insertions, 0 deletions

diff --git a/PhysX_3.4/Snippets/SnippetMultiThreading/SnippetMultiThreading.cpp b/PhysX_3.4/Snippets/SnippetMultiThreading/SnippetMultiThreading.cpp
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+// This code contains NVIDIA Confidential Information and is disclosed to you
+// under a form of NVIDIA software license agreement provided separately to you.
+//
+// Notice
+// NVIDIA Corporation and its licensors retain all intellectual property and
+// proprietary rights in and to this software and related documentation and
+// any modifications thereto. Any use, reproduction, disclosure, or
+// distribution of this software and related documentation without an express
+// license agreement from NVIDIA Corporation is strictly prohibited.
+//
+// ALL NVIDIA DESIGN SPECIFICATIONS, CODE ARE PROVIDED "AS IS.". NVIDIA MAKES
+// NO WARRANTIES, EXPRESSED, IMPLIED, STATUTORY, OR OTHERWISE WITH RESPECT TO
+// THE MATERIALS, AND EXPRESSLY DISCLAIMS ALL IMPLIED WARRANTIES OF NONINFRINGEMENT,
+// MERCHANTABILITY, AND FITNESS FOR A PARTICULAR PURPOSE.
+//
+// Information and code furnished is believed to be accurate and reliable.
+// However, NVIDIA Corporation assumes no responsibility for the consequences of use of such
+// information or for any infringement of patents or other rights of third parties that may
+// result from its use. No license is granted by implication or otherwise under any patent
+// or patent rights of NVIDIA Corporation. Details are subject to change without notice.
+// This code supersedes and replaces all information previously supplied.
+// NVIDIA Corporation products are not authorized for use as critical
+// components in life support devices or systems without express written approval of
+// NVIDIA Corporation.
+//
+// Copyright (c) 2008-2016 NVIDIA Corporation. All rights reserved.
+// Copyright (c) 2004-2008 AGEIA Technologies, Inc. All rights reserved.
+// Copyright (c) 2001-2004 NovodeX AG. All rights reserved.  
+
+
+// ****************************************************************************
+// This snippet shows how to coordinate threads performing asynchronous
+// work during the scene simulation. After simulate() is called, user threads 
+// are started that perform ray-casts against the scene. The call to 
+// fetchResults() is delayed until all ray-casts have completed.
+// ****************************************************************************
+
+#include <ctype.h>
+
+#include "PxPhysicsAPI.h"
+
+#include "../SnippetUtils/SnippetUtils.h"
+#include "../SnippetCommon/SnippetPrint.h"
+#include "../SnippetCommon/SnippetPVD.h"
+
+
+using namespace physx;
+
+PxDefaultAllocator		 gAllocator;
+PxDefaultErrorCallback	 gErrorCallback;
+
+PxFoundation*			 gFoundation = NULL;
+PxPhysics*				 gPhysics	= NULL;
+
+PxDefaultCpuDispatcher*	 gDispatcher = NULL;
+PxScene*				 gScene		= NULL;
+
+PxMaterial*				 gMaterial	= NULL;
+
+PxPvd*                   gPvd = NULL;
+
+struct RaycastThread
+{
+	SnippetUtils::Sync*		mWorkReadySyncHandle;
+	SnippetUtils::Thread*	mThreadHandle;
+};
+const PxU32				 gNumThreads = 1;
+RaycastThread			 gThreads[gNumThreads];
+
+SnippetUtils::Sync*		 gWorkDoneSyncHandle;
+
+const PxI32				 gRayCount = 1024;
+volatile PxI32			 gRaysAvailable;
+volatile PxI32			 gRaysCompleted;
+
+
+static PxVec3 randVec3() 
+{
+	return (PxVec3(float(rand())/RAND_MAX,
+		float(rand())/RAND_MAX, 
+		float(rand())/RAND_MAX)*2.0f - PxVec3(1.0f)).getNormalized();
+}
+
+static void threadExecute(void* data)
+{
+	RaycastThread* raycastThread = static_cast<RaycastThread*>(data);
+
+	// Perform random raycasts against the scene until stop.
+	for(;;)
+	{
+		// Wait here for the sync to be set then reset the sync
+		// to ensure that we only perform raycast work after the 
+		// sync has been set again.
+		SnippetUtils::syncWait(raycastThread->mWorkReadySyncHandle);
+		SnippetUtils::syncReset(raycastThread->mWorkReadySyncHandle);
+
+		// If the thread has been signaled to quit then exit this function.
+		if (SnippetUtils::threadQuitIsSignalled(raycastThread->mThreadHandle))
+			break;
+
+		// Perform a fixed number of random raycasts against the scene
+		// and share the work between multiple threads.
+		while (SnippetUtils::atomicDecrement(&gRaysAvailable) >= 0)
+		{
+			PxVec3 dir = randVec3();
+
+			PxRaycastBuffer buf;
+			gScene->raycast(PxVec3(0.0f), dir.getNormalized(), 1000.0f, buf, PxHitFlag::eDEFAULT);
+
+			// If this is the last raycast then signal this to the main thread.
+			if (SnippetUtils::atomicIncrement(&gRaysCompleted) == gRayCount)
+			{
+				SnippetUtils::syncSet(gWorkDoneSyncHandle);
+			}
+		}
+	}
+
+	// Quit the current thread.
+	SnippetUtils::threadQuit(raycastThread->mThreadHandle);
+}
+
+void createStack(const PxTransform& t, PxU32 size, PxReal halfExtent)
+{
+	PxShape* shape = gPhysics->createShape(PxBoxGeometry(halfExtent, halfExtent, halfExtent), *gMaterial);
+	for(PxU32 i=0; i<size;i++)
+	{
+		for(PxU32 j=0;j<size-i;j++)
+		{
+			PxTransform localTm(PxVec3(PxReal(j*2) - PxReal(size-i), PxReal(i*2+1), 0) * halfExtent);
+			PxRigidDynamic* body = gPhysics->createRigidDynamic(t.transform(localTm));
+			body->attachShape(*shape);
+			PxRigidBodyExt::updateMassAndInertia(*body, 10.0f);
+			gScene->addActor(*body);
+		}
+	}
+	shape->release();
+}
+
+void createPhysicsAndScene()
+{
+	gFoundation = PxCreateFoundation(PX_FOUNDATION_VERSION, gAllocator, gErrorCallback);
+	
+	gPvd = PxCreatePvd(*gFoundation);
+	PxPvdTransport* transport = PxDefaultPvdSocketTransportCreate(PVD_HOST, 5425, 10);
+	gPvd->connect(*transport,PxPvdInstrumentationFlag::eALL);
+
+	gPhysics = PxCreatePhysics(PX_PHYSICS_VERSION, *gFoundation, PxTolerancesScale(),true,gPvd);
+	gMaterial = gPhysics->createMaterial(0.5f, 0.5f, 0.6f);
+
+	PxSceneDesc sceneDesc(gPhysics->getTolerancesScale());
+	sceneDesc.gravity = PxVec3(0.0f, -9.81f, 0.0f);
+	
+	PxU32 numCores = SnippetUtils::getNbPhysicalCores();
+	gDispatcher = PxDefaultCpuDispatcherCreate(numCores == 0 ? 0 : numCores - 1);
+	sceneDesc.cpuDispatcher	= gDispatcher;
+	sceneDesc.filterShader	= PxDefaultSimulationFilterShader;
+	
+	gScene = gPhysics->createScene(sceneDesc);
+	
+	PxRigidStatic* groundPlane = PxCreatePlane(*gPhysics, PxPlane(0,1,0,0), *gMaterial);
+	gScene->addActor(*groundPlane);
+
+	for(PxU32 i=0;i<5;i++)
+		createStack(PxTransform(PxVec3(0,0,i*10.0f)), 10, 2.0f);
+}
+
+void createRaycastThreads()
+{
+	// Create and start threads that will perform raycasts.
+	// Create a sync for each thread so that a signal may be sent
+	// from the main thread to the raycast thread that it can start 
+	// performing raycasts.
+	for (PxU32 i=0; i < gNumThreads; ++i)
+	{
+		//Create a sync.
+		gThreads[i].mWorkReadySyncHandle = SnippetUtils::syncCreate();
+
+		//Create and start a thread.
+		gThreads[i].mThreadHandle =  SnippetUtils::threadCreate(threadExecute, &gThreads[i]);
+	}
+
+	// Create another sync so that the raycast threads can signal to the main 
+	// thread that they have finished performing their raycasts.
+	gWorkDoneSyncHandle = SnippetUtils::syncCreate();
+}
+
+void initPhysics()
+{
+	createPhysicsAndScene();
+	createRaycastThreads();
+}
+
+void stepPhysics()
+{
+	// Start simulation
+	gScene->simulate(1.0f/60.0f);
+
+	// Start ray-cast threads
+	gRaysAvailable = gRayCount;
+	gRaysCompleted = 0;
+
+	// Signal to each raycast thread that they can start performing raycasts.
+	for (PxU32 i=0; i < gNumThreads; ++i)
+	{
+		SnippetUtils::syncSet(gThreads[i].mWorkReadySyncHandle);
+	}
+
+	// Wait for raycast threads to finish.
+	SnippetUtils::syncWait(gWorkDoneSyncHandle);
+	SnippetUtils::syncReset(gWorkDoneSyncHandle);
+
+	// Fetch simulation results
+	gScene->fetchResults(true);
+}
+	
+void cleanupPhysics()
+{
+	// Signal threads to quit.
+	for (PxU32 i=0; i < gNumThreads; ++i)
+	{
+		SnippetUtils::threadSignalQuit(gThreads[i].mThreadHandle);
+		SnippetUtils::syncSet(gThreads[i].mWorkReadySyncHandle);
+	}
+
+	// Clean up raycast threads and syncs.
+	for (PxU32 i=0; i < gNumThreads; ++i)
+	{
+		SnippetUtils::threadWaitForQuit(gThreads[i].mThreadHandle);
+		SnippetUtils::threadRelease(gThreads[i].mThreadHandle);
+		SnippetUtils::syncRelease(gThreads[i].mWorkReadySyncHandle);
+	}
+
+	// Clean up the sync for the main thread.
+	SnippetUtils::syncRelease(gWorkDoneSyncHandle);
+
+	gScene->release();
+
+	gDispatcher->release();
+
+	gPhysics->release();
+	PxPvdTransport* transport = gPvd->getTransport();
+	gPvd->release();
+	transport->release();
+
+  	gFoundation->release();
+	
+	printf("SnippetMultiThreading done.\n");
+}
+
+int snippetMain(int, const char*const*)
+{
+	initPhysics();
+
+	for(PxU32 i=0; i<100; ++i)
+		stepPhysics();
+
+	cleanupPhysics();
+
+	return 0;
+}
+