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Comment by CreepGin | Hacker News Reader

Hmm maybe your friend has forsaken physics. He did not implement any physics in his engine! (not yet?) =D

He has a famous blog post somewhere teaching beginners how to do physics on 2D platformers.

Link?

It looks quite nice.

this is mostly sprite/collision well known patterns summaries. not much on physics.

This is probably the most comprehensive single written guide to how platformers are implemented. Definitely worth a read.

it has quantum physics, which can be approximated to zero based on experiments on the applicable scales :D

Right, tell that to your semiconductor based computing device.

To a first approximation, this would be something like

    vec3 pos = {0f, 0f, 0f};

which I think was the joke, you may now laugh.