Method destroyChunk

physx/samples/samplelargeworld/ChunkLoader.cpp:788–866

just removed the actors from scene, do not release them

//just removed the actors from scene, do not release them
void BackgroundLoader::destroyChunk(ChunkID id)
{
	PxCollection *theCollection = NULL;
	bool inScene = false;
	void* memory = NULL;
	{
		shdfnd::Mutex::ScopedLock al(mCollectionLock);	
	
		CollectionIdMap::iterator it = mCollectionIdMap.find(id);
		if( it == mCollectionIdMap.end() )
			return;
		
		inScene = it->second.addToScene;
		theCollection = it->second.collection;
		memory = it->second.memory;
		mCollectionIdMap.erase(it);
	}
	

	if(inScene)
	{
		//remove objects from scene first
		PxU32 count = theCollection->getNbObjects();
		{
			PxSceneWriteLock scopedLock(mSampleLargeWorld->getActiveScene());
			for(PxU32 i = 0; i < count; i++)
			{
				PxBase *object = &theCollection->getObject(i);
				PX_ASSERT(object);
				PxType type = object->getConcreteType();
				if( type == PxConcreteType::eRIGID_STATIC || type == PxConcreteType::eRIGID_DYNAMIC )
				{
					mScene.removeActor( *static_cast<PxActor*>(object) );
				}
			}
		}
	}
	
	//serialize the objects when they are not used
	serialize(theCollection, id);
	PxCollectionExt::releaseObjects(*theCollection);
	theCollection->release();
	
	if(memory)
	{
		free(memory);
		memory = NULL;
	}
	
	//Remove the un-important actors on this chunk, freeze the important actors
	std::vector<DynamicObjects*>::iterator it = mDyncActors.begin();
	while(it != mDyncActors.end()) 
	{
		PxRigidDynamic* actor = (*it)->actor;
		PxVec3 actorPos;		
		{
			PxSceneReadLock scopedLock(mSampleLargeWorld->getActiveScene());
			actorPos = actor->getGlobalPose().p;