17. Speeding up the separating axis test using inscribed spheres (box2d.org)

The separating axis test (SAT) works well for computing contact manifolds. Unlike GJK, it is robust when shapes are very close together and it works when shapes are overlapped. Box3D uses SAT for computing the contact manifolds between convex hulls (polytopes). I like using SAT because I can get all the contact points at once and it doesn't need a fallback algorithm for overlap like GJK does. So I don't need to waste time calling GJK only to have it fail and then drop to a fallback algorithm like EPA or SAT.

18. Show HN: The Zoomist – looking and listening to ordinary things more closely (www.youtube.com)

The Zoomist reveals the hidden world of everyday things through macro photography, microscope footage, extreme close-ups, ASMR, close-up sound recordings, and immersive ambient sound.

Look closer. Listen closer.

Explore ordinary objects from perspectives you rarely get to see or hear.

From microscopic details and extreme macro views to satisfying sounds and immersive environments, each video reveals structures, movements, textures, and sounds that normally go unnoticed.

See familiar things differently. Change your attention, and you change your perspective.

The Zoomist
Closer to Everything.

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