Question about mesh bounding box center discrepancy for powerplant model in ModelLoadSDKMESH.cpp

[xtmacbook]

Hello,

I have a question regarding ModelLoadSDKMESH.cpp.
When loading the powerplant model, I found a discrepancy in the computed bounding box center.

Two different implementations are being compared:

1. The bounding box calculation logic inside ModelLoadSDKMESH.cpp
2. The original SDKMesh loader used in the old DirectX 11 sample code

Both load the same powerplant model file, but the final merged scene bounding box center is different between these two code paths.

I want to figure out what could cause this difference.
Possible suspects I am checking:

• Different handling of mesh local bounding box transform
• Different AABB merging logic
• Whether mesh bounding boxes are already pre-transformed when loaded from the SDKMESH file

Could you help point out what may lead to this bounding box center mismatch?

Thanks!

[walbourn]

Is the SDKMESH legacy loader you using recalculating it, or is it using the value in the SDKMESH file itself? I suspect that model was orignally exported with an olde version of https://github.com/walbourn/contentexporter.

[xtmacbook]

the powerplant model from CascadedShadowsManager11,and use using the value in the SDKMESH file itself