Class BitMapBase

physx/source/common/src/CmBitMap.h:59–130

	*/
	template<class Allocator>
	class BitMapBase : public Ps::UserAllocated
	{
	//= ATTENTION! =====================================================================================
	// Changing the data layout of this class breaks the binary serialization format.  See comments for 
	// PX_BINARY_SERIAL_VERSION.  If a modification is required, please adjust the getBinaryMetaData 
	// function.  If the modification is made on a custom branch, please change PX_BINARY_SERIAL_VERSION
	// accordingly.
	//==================================================================================================

		PX_NOCOPY(BitMapBase)

	public:

		// PX_SERIALIZATION
		/* todo: explicit */ BitMapBase(const PxEMPTY) 
		{
			if(mMap)
				mWordCount |= PX_SIGN_BITMASK;
		}

		void	exportExtraData(PxSerializationContext& stream, void*)	
		{
			if(mMap && getWordCount())
			{
				stream.alignData(PX_SERIAL_ALIGN);
				stream.writeData(mMap, getWordCount()*sizeof(PxU32));
			}
		}
		void	importExtraData(PxDeserializationContext& context)
		{
			if(mMap && getWordCount())
				mMap = context.readExtraData<PxU32, PX_SERIAL_ALIGN>(getWordCount());
		}
		//~PX_SERIALIZATION

		//sschirm: function for placement new. Almost the same as importExtraData above, but lets you set word count and map after default construction
		void importData(PxU32 worldCount, PxU32* words)
		{
			PX_ASSERT(mWordCount == 0 && !mMap);
			mMap = words;
			mWordCount = worldCount | PX_SIGN_BITMASK;
		}
		
		PX_INLINE BitMapBase(Allocator& allocator) : mMap(0), mWordCount(0), mAllocator(allocator) {}

		PX_INLINE BitMapBase() : mMap(0), mWordCount(0) {}

		PX_INLINE ~BitMapBase()
		{
			if(mMap && !isInUserMemory())
				mAllocator.deallocate(mMap);
			mMap = NULL;
		}

		PX_INLINE Allocator&	getAllocator() { return mAllocator; }

		PX_INLINE void growAndSet(PxU32 index)
		{