Show HN: I made a portals physics engine to prove my point

By nick-keller · 2026-11-03 · 5 points · 4 comments

I assume everyone has seen the supposedly portal "paradox" where a blue portal comes smashing down on a cube and people argue if it shoots out the orange portal or not. Well, I built a simulation with a set of scenarios to look at, each introducing a new concept, slowly building…

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