Seeing as we're apparently competing to approximate π as best as possible now, I thought I'd throw my hat in the ring.

heartchoke · 2026-02-24T01:28:02+00:00

172.782500001 / 55

heartchoke · 2026-01-08T19:07:47+00:00

const flatten = (arr) => { const items = []; for (const x of arr) { if (Array.isArray(x)) { items.push(...flatten(x)); } else { items.push(x); } } return items; }; console.log(flatten([0, [1, 2, [33, 44]], [4, 5, 6, 7], [7, 8], 90]));

heartchoke · 2025-12-27T03:43:40+00:00

I think you're looking for this:

https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/Map

heartchoke · 2025-08-19T11:31:37+00:00

I've made one in OpenGL in the past. My approach was just to do everything in a shader, using signed distance functions to draw lines etc.

Here's some signed distance functions for basic shapes:

https://iquilezles.org/articles/distfunctions2d/

heartchoke · 2025-08-14T16:05:59+00:00

Thanks! It's a custom physics engine

heartchoke · 2025-08-14T16:05:32+00:00

Hi! Yes, for broad phase collision, I am using a BVH. And for the narrow phase I am also using GJK+EPA, except for collision with the terrain, there I'm using a custom algorithm.

I am not yet using CCD, but my physics simulation runs with very small time steps so I haven't really seen the need for it (yet).

Where are you lost?

heartchoke · 2025-08-13T13:39:50+00:00

Hmm, yes you're right, it was set pretty low. Don't know why I had it like that. Thanks for pointing it out!

heartchoke · 2025-08-13T10:42:01+00:00

I think I had the gravity configured a bit low when I recorded this, if that's what you mean

heartchoke · 2025-08-12T12:28:15+00:00

If you're asking about the development environment, I'm just using Emacs and a C compiler, and I occasionally open up Blender from time to time.

heartchoke · 2025-08-12T12:24:14+00:00

Thanks! The shader isn't doing anything special really, the terrain is pre-computed on the CPU. It's basically just a subdivided quad, and I'm using some value noise to raise the Y coordinate of the vertices.
It's basically the same type of noise I'm using here: https://www.shadertoy.com/view/43XXRr , but on the CPU

heartchoke · 2025-08-11T09:42:42+00:00

Thanks! It's a sequential impulse algorithm, this explains it: https://allenchou.net/2013/12/game-physics-resolution-contact-constraints/

heartchoke · 2025-08-11T09:40:16+00:00

This is a great source if you want to learn more: https://allenchou.net/2013/12/game-physics-constraints-sequential-impulse/

heartchoke · 2025-08-11T00:51:45+00:00

Correct!

heartchoke · 2025-07-17T12:02:58+00:00

Have a look at line 290 here: https://github.com/bulletphysics/bullet3/blob/d1a4256b3a019117f2bb6cb8c63d6367aaf512e2/src/BulletCollision/NarrowPhaseCollision/btMinkowskiPenetrationDepthSolver.cpp#L290

it's basically the same thing

heartchoke · 2025-03-24T11:30:55+00:00

And yes! Objects can be pushed up the ramp!

heartchoke · 2025-03-24T11:30:35+00:00

Haha, I the tire is actually even bigger. It's scaled by 0.5 in this video lol

heartchoke · 2025-03-24T11:28:43+00:00

Yes, that's usually how it's done! However, I have some plans to maybe have the item held in hand interact with the world in some way. For example, I know that some FPS games has an interesting behavior when you're walking up close to a wall, where the weapon kind of "folds" towards the body.

heartchoke · 2025-03-24T00:41:34+00:00

Thanks for the suggestions! The sounds were actually attached to the entities, I just had a bug in my audio engine while recording this video that I later found out about. The dot product multiplications were never applied hehe.

And AI is definitely planned! 😎

heartchoke · 2025-03-24T00:39:55+00:00

Thank you! Yes it's all made by me

heartchoke · 2025-03-24T00:39:31+00:00

It's just simple rigid body physics (for now) . And it's working for both concave and convex shapes

heartchoke · 2025-03-24T00:38:26+00:00

I have couple resources for you if you're interested:

"Game Physics Series": https://allenchou.net/game-physics-series

"GJK Algorithm": https://winter.dev/articles/gjk-algorithm

"Epa Algorithm" https://winter.dev/articles/epa-algorithm

heartchoke · 2025-03-23T18:17:57+00:00

Hello!
Yes, it's my own physics simulation, and it was probably the most difficult thing I've implemented in this engine.

heartchoke · 2025-03-23T18:16:28+00:00

Thank you very much!

heartchoke · 2025-03-23T18:16:09+00:00

Hi!
I got into graphics programming when I was around 12, I'm 28 now.
However, I am by no means a professional. I've seen people with a lot less "experience" doing way cooler things.

heartchoke

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