Transform data minimum alignment fix

Author: kevyuu

include/nbl/asset/IAccelerationStructure.h

@@ -23,6 +23,8 @@ namespace nbl::asset
 class IAccelerationStructure : public virtual core::IReferenceCounted
 {
 	public:
+		static constexpr inline size_t TRANSFORM_DATA_MIN_ALIGNMENT = 16;
+
 		// build flags, we don't expose flags that don't make sense for certain levels
 		enum class BUILD_FLAGS : uint8_t
 		{

src/nbl/video/utilities/CAssetConverter.cpp

@@ -3024,7 +3024,7 @@ auto CAssetConverter::reserve(const SInputs& inputs) -> SReserveResult
 									uint16_t alignment = hlsl::max(0x1u<<hlsl::findLSB(geom.vertexStride),32u);
 									if (geom.hasTransform())
 									{
-										size = core::alignUp(size,alignof(float))+sizeof(hlsl::float32_t3x4);
+										size = core::alignUp(size, IAccelerationStructure::TRANSFORM_DATA_MIN_ALIGNMENT)+sizeof(hlsl::float32_t3x4);
 										alignment = hlsl::max<uint16_t>(alignof(float),alignment);
 									}
 									uint16_t indexSize = 0;
@@ -5061,7 +5061,7 @@ ISemaphore::future_t<IQueue::RESULT> CAssetConverter::convert_impl(SReserveResul
 									uint16_t alignment = hlsl::max(0x1u<<hlsl::findLSB(geom.vertexStride),32u);
 									if (geom.hasTransform())
 									{
-										size = core::alignUp(size,alignof(float))+sizeof(hlsl::float32_t3x4);
+										size = core::alignUp(size, IAccelerationStructure::TRANSFORM_DATA_MIN_ALIGNMENT)+sizeof(hlsl::float32_t3x4);
 										alignment = hlsl::max<uint16_t>(alignof(float),alignment);
 									}
 									uint16_t indexSize = 0u;
@@ -5265,7 +5265,7 @@ ISemaphore::future_t<IQueue::RESULT> CAssetConverter::convert_impl(SReserveResul
 									}
 									if (geom.hasTransform())
 									{
-										offset = core::alignUp(offset,alignof(float));
+										offset = core::alignUp(offset, IAccelerationStructure::TRANSFORM_DATA_MIN_ALIGNMENT);
 										outGeom.transform = {.offset=offset,.buffer=smart_refctd_ptr<const IGPUBuffer>(scratchBuffer)};
 										memcpyCallback.data = &geom.transform;
 										if (!streamDataToScratch(offset,sizeof(geom.transform),memcpyCallback))