filament VS bevy

Also: Filament is a real-time physically-based renderer written in C++. It is mobile-first, but also multi-platform.

https://google.github.io/filament/

Also beginner here, I think you can learn other's codes to get a better understanding of the API by learning how others can abstract these concept into higher level. They're many great projects out there like Google's pbr renderer filament https://github.com/google/filament, AMD's gltf sample https://github.com/GPUOpen-LibrariesAndSDKs/glTFSample and also as many suggested, the Sascha Willems's repos https://github.com/SaschaWillems and the official sample https://github.com/KhronosGroup/Vulkan-Samples

In the Flame discussions page, there is a request for 3D, and Flame developers write that they will be happy to start working on support once when Impeller is stable on most major platforms. So what can the community do? 1) Create discussion topics, just like these posts. Or in other discussion forums. 2) Learn about Impeller, Filament, Flame, and Flutter and be willing to contribute to their development. 3) Join Flame now and try to do something or contribute. 4) Study the implementation of Flutter 3D, and try to do something together with ARCore or ARKit plugins.

Anyone know much about how this compares to Filament by Google?

https://github.com/google/filament

Have you tried Filament? https://google.github.io/filament/

I was looking through the Google Filament repo and I noticed that the classes in include/filament use a trick I haven't seen before that hide implementation details similar to PIMPL.

There are a handful of other examples out there of high-level shading languages - Cg (long deprecated), whatever Filament Material system uses (example), and various GLSL preprocessors (example).

I'm loading a texture using OpenGL enjoy this glTexImage2D( GL_TEXTURE_2D, 0, GL_RGBA, texture.width, texture.height, 0, GL_RGBA, GL_UNSIGNED_BYTE, texture.pixels.data()); The issue is that the color of the image looks different from the one I see when I open the file on the system image viewer. On the screenshot you can see the yellow on the face displayed on the system image viewer has the color #FEDE57 but the one that is displayed in the OpenGL window is #FEE262 Is there any flag or format I could use to match the same color calibration? Displaying this same image as a Vulkan texture looks fine, so I can discard there is not an issue in how I load the image data. [EDIT] In the end it seems like‏‏‎‏‏‎‏‏‎‏‏‎­the framebuffer in OpenGL doesn't gets color corrected, so you have to tell the OS to do it for you #include void prepareNativeWindow(SDL_Window *sdlWindow) { SDL_SysWMinfo wmi; SDL_VERSION(&wmi.version); SDL_GetWindowWMInfo(sdlWindow, &wmi); NSWindow *win = wmi.info.cocoa.window; [win setColorSpace:[NSColorSpace sRGBColorSpace]]; } I found this solution here https://github.com/google/filament/blob/main/libs/filamentapp/src/NativeWindowHelperCocoa.mm https://preview.redd.it/2td3rs19p4f71.jpg?width=1476&format=pjpg&auto=webp&s=454d4e554d47e3a4e11a16c938304f1125ed7622

I found this issue on github https://github.com/google/filament/pull/3190/files

I don't see WASM/WebGPU changing anything when it comes to gaming, as an industry, personally. 3d visualizations and interactive websites? Yeah definitely a nice improvement over WebGL 2, if years late.

WebGPU is pretty far behind what AAA games are using even as of 6 years ago. There's extra overhead and security in the WebGPU spec that AAA games do not want. Browsers do not lend themselves to downloading 300gb of assets.

Additionally, indie devs aren't using Steam for the technical capabilities. It's purely about marketshare. Video games are a highly saturated market. The users are all on Steam, getting their recommendations from Steam, and buying games in Steam sales. Hence all the indie developers publish to Steam. I don't see a web browser being appealing as a platform, because there's no way for developers to advertise to users.

That's also only indie games. AAA games use their own launchers, because they don't _need_ the discoverability from being on Steam. So they don't, and avoid the fees. If anything users _want_ the Steam monopoly, because they like the platform, and hate the walled garden launchers from AAA companies.

(I work on high end rendering features for the Bevy game engine https://bevyengine.org, and have extensive experience with WebGPU)

I was working through an example in the repo for the Bevy game engine recently and came across this code

That's possible. I did spend quite a bit of time tinkering with compiler flags, and followed the recommendations.

Some notes I found just now seems to agree with my results, though: https://github.com/bevyengine/bevy/issues/3978#issuecomment-...

I cannot recommend immediate mode GUI programming based on the limitations I've experienced working with egui.

egui does not support putting two widgets in the center of the screen: https://github.com/emilk/egui/issues/3211

It's really easy to get started with immediate mode, it's really easy to bust out some UI, but the second you start trying to involve dynamically resized context and responsive layouts -- abandon all hope. The fact it has to calculate everything in a single pass makes these things hard/impossible.

... that said, I'm still using it for https://ant.care/ (https://github.com/MeoMix/symbiants) because it's the best thing I've found. I'm crossing my fingers that Bevy's UI story (or Kayak https://github.com/StarArawn/kayak_ui) become significantly more fleshed out sooner rather than later. Bevy 0.13 should have lots more in this area though (https://github.com/bevyengine/bevy/discussions/9538)

I've also been enjoying building My First Game™ in Bevy using ECS. The community around Bevy really shines, but Flecs (https://github.com/SanderMertens/flecs) is arguably a more mature, open-source ECS implementation. You don't get to write in Rust, though, which makes it less cool in my book :)

I'm not very proud of the code I've written because I've found writing a game to be much more confusing than building websites + backends, but, as the author notes, it certainly feels more elegant than OOP or globals given the context.

I'm building for WASM and Bevy's parallelism isn't supported in that context (yet? https://github.com/bevyengine/bevy/issues/4078), so the performance wins are just so-so. Sharing a thread with UI rendering suuucks.

If anyone wants to browse some code or ask questions, feel free! https://github.com/MeoMix/symbiants

These days, some game engines have done pretty well at making compute shaders easy to use (such as Bevy [1] -- disclaimer, I contribute to that engine). But telling the scientific/financial/etc. community that they need to run their code inside a game engine to get a decent experience is a hard sell. It's not a great situation compared to how easy it is on NVIDIA's stack.

[1]: https://github.com/bevyengine/bevy/blob/main/examples/shader...

This is the API you need: https://github.com/bevyengine/bevy/pull/9774

Most of Nanite (at least, everything but the LOD system, I haven't tried that part, and the compute rasterizer due to lack of storage image atomics because Metal lacks them...) is implementable in WebGPU actually.

I have a PR that does a lot of the same things (meshlets, visbuffer, material depth, two pass occlusion culling) open for Bevy https://github.com/bevyengine/bevy/pull/10164 that I've been working on, which uses WebGPU.

WebGPU is actually a pretty good API imo. It's missing some advanced features like raytracing, mesh shaders, and subgroup operations (coming soon!), but it can still do a lot.

The much bigger missing feature is "bindless" support (non-uniform arrays of bound resources). BindGroup overhead (and ergonomics) is a significant downside.