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3.8.2 Spherical Polygons, Equation 3.6 #17

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steimich96 opened this issue Jan 4, 2024 · 2 comments
Open

3.8.2 Spherical Polygons, Equation 3.6 #17

steimich96 opened this issue Jan 4, 2024 · 2 comments

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@steimich96
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Formula 3.6 for calculating the area of a spherical triangle: Link

I might be misunderstanding but this formula does not make sense to me. Is this a typo? If it is correct, it would maybe help to add some context for deriving the formula (maybe in the Appendix).

Following from the code, the numerator should be dot(a, cross(b, c)).

@massile
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massile commented Jan 12, 2024

I came to the same conclusion, I think it is a typo
I created a PR with the corresponding change and explanations here

@mmp
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mmp commented Jan 25, 2024

It is a typo, thanks for reporting! I'll push an update to the online errata and the book website in a little while.

@steimich96 let me know how you want to be credited in the errata.

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