Picked point at wrong position

kzhsw · July 3, 2024, 5:57am

It’s something related to data alignment, gpu renders everything correctly, but VertexBuffer.GetFloatData aligns pointer instead of data.

The pr:

github.com/BabylonJS/Babylon.js

buffer: copy unaligned data in GetFloatData

BabylonJS:master ← kzhsw:patch-1

opened 05:55AM - 03 Jul 24 UTC

kzhsw

+3 -2

In `VertexBuffer.GetFloatData`, if data is not aligned to 4 bytes, the current i…mpl is to align the offset to make code work, but this would make data returned here differ from data passed to gpu, so algos depending on result of it could be wrong. This commit changes this behavior to copying the buffer on unaligned buffers or offsets. Related playground: <https://playground.babylonjs.com/#5T7E1W#8> Forum thread: <https://forum.babylonjs.com/t/picked-point-at-wrong-position/51698> Related commit: https://github.com/BabylonJS/Babylon.js/commit/9c2df86f54d7660b859eabcdb3b096c1f83800d4

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Picked point at wrong position

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