What is the theory behind this "triangle-box overlap test"?

Jiang Ye @Jiang_Ye5

11 November 2016 0 1K Report

In the paper (see the link)

Tomas Akenine-Moller (2001): Fast 3D Triangle-Box Overlap Testing.

What is the theory behind the "9 tests" part? (i.e. equation 1~3)

https://fileadmin.cs.lth.se/cs/Personal/Tomas_Akenine-Moller/pubs/tribox.pdf

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