more fixes in serialization/BVH/endianness

Demos/ConcaveDemo/ConcavePhysicsDemo.cpp

@@ -201,7 +201,7 @@ void	ConcaveDemo::initPhysics()
 	void* buffer = 0;
 	int numBytes = trimeshShape->getOptimizedBvh()->calculateSerializeBufferSize();
 	buffer = btAlignedAlloc(numBytes,16);
-	bool swapEndian = true;
+	bool swapEndian = false;
 	trimeshShape->getOptimizedBvh()->serialize(buffer,numBytes,swapEndian);
 	FILE* file = fopen("bvh.bin","wb");
 	fwrite(buffer,1,numBytes,file);
@@ -225,12 +225,14 @@ void	ConcaveDemo::initPhysics()
 
 		fseek(file, 0, SEEK_SET);
 
-		void* buffer = btAlignedAlloc(size,16);
+		int buffersize = size+btOptimizedBvh::getAlignmentSerializationPadding();
+
+		void* buffer = btAlignedAlloc(buffersize,16);
 		//memset(buffer,0xcc,size);
 		int read = fread(buffer,1,size,file);
 		fclose(file);
-		bool swapEndian = true;
-		bvh = btOptimizedBvh::deSerializeInPlace(buffer,size,swapEndian);
+		bool swapEndian = false;
+		bvh = btOptimizedBvh::deSerializeInPlace(buffer,buffersize,swapEndian);
 	}
 
 	trimeshShape->setOptimizedBvh(bvh);

src/BulletCollision/CollisionShapes/btOptimizedBvh.cpp

@@ -898,10 +898,14 @@ static const unsigned BVH_ALIGNMENT_BLOCKS = 2;
 
 
 
+unsigned int btOptimizedBvh::getAlignmentSerializationPadding()
+{
+	return BVH_ALIGNMENT_BLOCKS * BVH_ALIGNMENT;
+}
 
 unsigned btOptimizedBvh::calculateSerializeBufferSize()
 {
-	unsigned baseSize = sizeof(btOptimizedBvh) + BVH_ALIGNMENT_BLOCKS * BVH_ALIGNMENT;
+	unsigned baseSize = sizeof(btOptimizedBvh) + getAlignmentSerializationPadding();
 	baseSize += sizeof(btBvhSubtreeInfo) * m_subtreeHeaderCount;
 	if (m_useQuantization)
 	{

src/BulletCollision/CollisionShapes/btOptimizedBvh.h

@@ -344,6 +344,8 @@ public:
 	///deSerializeInPlace loads and initializes a BVH from a buffer in memory 'in place'
 	static btOptimizedBvh *deSerializeInPlace(void *i_alignedDataBuffer, unsigned i_dataBufferSize, bool i_swapEndian);
 
+	static unsigned int getAlignmentSerializationPadding();
+
 	inline bool isQuantized()
 	{
 		return m_useQuantization;