[PATCH] d3dx9: Implement D3DXComputeTangent().

[Zebediah Figura (she/her)]

On 3/2/21 1:27 AM, Matteo Bruni wrote:
> A rare occasion where I can quote myself recursively, so I'll do just
> that: https://www.winehq.org/pipermail/wine-devel/2019-April/143293.html
> 
> While it would be nice to have some nice and detailed tests along the
> lines of mesh.c:test_compute_normals(), I'll settle for the minimum
> necessary to confirm that the arguments to D3DXComputeTangentFrameEx()
> are correct (or otherwise, e.g. if that can't be tested for whatever
> reason, a small comment in the code).
> 

Yeah, sorry, I missed that somehow.

The reason (which I should probably have mentioned regardless) I didn't
write tests is that, as far as I can tell, the actual functionality of
D3DXComputeTangent() isn't implemented. I could probably address that
too, though...

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