Function copy

physx/source/common/src/CmBitMap.h:216–222

		PxU32 size() const { return getWordCount()*32; }

		void copy(const BitMapBase& a)
		{
			extendUninitialized(a.getWordCount()<<5);
			PxMemCopy(mMap, a.mMap, a.getWordCount() * sizeof(PxU32));
			if(getWordCount() > a.getWordCount())
				PxMemSet(mMap + a.getWordCount(), 0, (getWordCount() - a.getWordCount()) * sizeof(PxU32));
		}

		PX_INLINE PxU32 count()		const
		{