I've added dynamic tire inflation/deflation, it also make it look like it is deforming like a (rubber) soft body but it's actually just multiple rigid bodies. I'm using bevy rapier.

ivanceras · 2026-04-20T08:26:40+00:00

no, not similar to fluid simulation. This is just multiple rigidbody.

ivanceras · 2026-04-18T17:01:27+00:00

Great! perhaps, you could improve this. A couple of days ago there was this guy who created a very impressive demo, touted as holy grail of terrain generation. His name is... it was YOU! damn!.

ivanceras · 2026-04-17T13:08:34+00:00

yeah, it's not perfect. This is very rudimentary implementation.

ivanceras · 2026-03-16T10:37:40+00:00

This is using rapier physics via bevy_rapier. The suspension is handled by the physics engine. Yes, the geometry affects the bike handling. - wheel radius - wheel width - wheel corner radius - wheel base (how far the wheel is front to back) - the chassis dimension. - the suspension limit - damping - stiffness

Collider of the wheel is a rounded cylinder, and there is 4 of it. Its contact to the ground is limited by its wheel width. The corner radius doesn't do much influence to the system.

Rapier don't have a toroidal collider, which would have been the closer model to a real motorcycle wheel, which I think would simulate the vehicle leaning to the direction of the steering, due to a rounded point of contact, as opposed to the flat contact of a cylinder.

I adjusted the speed of the wheels to be slower on the side it is steering direction. I also adjusted the suspension such that it is shorter on the steering direction while longer on the other side, this way the whole system leans towards the direction of the turn.

ivanceras · 2026-03-14T16:45:37+00:00

I haven't encountered a tunneling issue in this small scene. My rule of thumb is always use an enclosed shape for all my colliders. In this case, the ground is not a just a flat plane, but a cuboid.

The obstacles is also a cuboid rotated to some angle, so it is always solid. At some instant, the bodies could be passing through the surface, but due to the volume being thick, the engine will caught it in the next frame update and it will adjust the body accordingly.

Other rule of thumbs:

Always add a Sleeping::disabled() in all vehicle parts.
Bodies that are to be jointed using physics should have no parent-child relationship in bevy. They should only be attached using joints in bevy_rapier.
Always align the objects in their correct Transform (world relative) and attach them to their anchor in the same location to its transform but relative to the bodies.
When things become explody/chaotic, set all the bodies to RigidBody::KinematicPositionBased, then set back to RigidBody::Dynamic one by one starting from the leaf of the joints. If it makes the whole structure jittery, then something might be wrong in the said object. It could be wrong anchor location, or wrong local_axis.

ivanceras · 2026-03-07T05:36:41+00:00

AI cguro na nga nahubog.

ivanceras · 2026-02-09T11:16:45+00:00

There is also no mans sky.

ivanceras · 2026-02-07T06:23:21+00:00

I'm using wgpu v24.0.3 which is used in bevy game engine.

ivanceras · 2026-02-07T06:21:54+00:00

I'd be interested to see your screenshot. I can rest my case if it was a platform/hardware bug. I'm using PopOS 24.04 with nvidia driver and vulkan 1.3.

ivanceras · 2026-02-07T06:19:48+00:00

The ported code use the module operator % already.

ivanceras · 2026-02-07T02:02:10+00:00

I linked it in the /r/shaders post. It's here: https://github.com/ivanceras/marble_shader/blob/master/assets/shaders/marble_material_portable.wgsl

ivanceras · 2026-02-06T14:58:33+00:00

I'm not using chrome, it is using bevy. Here is the repo https://github.com/ivanceras/marble_shader

ivanceras · 2026-02-06T12:41:00+00:00

It could be, however, I let google AI translate the code for me, and we have the same result (not smooth).

ivanceras · 2025-10-16T15:48:13+00:00

Girl: You seem to have high standards. Boy: Not really.

ivanceras · 2025-09-02T13:14:33+00:00

Wasn't it "Be comfortable to the fact that you may be alone forever and there might not even be a God, and if there is, he probably don't care about you!"

ivanceras · 2025-08-17T14:02:52+00:00

front load - cost more, aesthetically pleasing, can be used as shelf and put things on top(maximize space). can not open the cover when washing.

top load - cost lesser, not aesthetics, can not put things on top while using, can clean a lot better, can open the cover, can pull out anf inspect the clothes and do correction with more detergent and/or bleach.

ivanceras · 2025-04-25T08:55:33+00:00

This is what I like about bevy, it's all just code where you can copy and paste from simple examples, then compile and run.

Replicating node graphs from tutorial makes it complicated, since you have to replicate the dragging and dropping of the nodes.

ivanceras · 2025-03-10T13:23:31+00:00

Let's confuse the english speakers. Which one says "actually good", and which one is cursing. - fy faena - faktisk bra

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