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Let's say, hypothetically, that I have a random mesh from the Internet that was modeled by an incompetent jackwagon of an artist, which has consistent face normals, but inconsistent triangle winding. Is there any easy-peasy way to go "Oh, this triangle is wound CW/CCW"?
And in the event that my flatmate is reading this: It's the original artist that was the incompetent jackwagon, you're awesome. Thank you for correcting the normals so it at least renders with correct lighting if I disable culling.
calculate the cross product of (V2-V1) and (V3-V1), and figure if it aligns with the normal or is opposed to it (dunno which one would be correct)
Not a horrible idea. Since my flatmate corrected the normals on the mesh at least, it should be possible to determine whether the cross product agrees or disagrees with the normal.
Off the top of my head... Compare the sign of dot_product(cross_product(edge1, edge2), normal) to the normal. Pick any two edges. Same sign = CW Different sign = CCW
Yep, that sounds like a solid plan. Thanks!
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