RaZ - Modern & multiplatform 3D game engine | Graphics Programming | Page 1

fossil agate Dec 31, 2023, 5:16 PM

#

Better late than never, lemme introduce yet another game engine froge_yeehaw https://github.com/Razakhel/RaZ

It can be used under Windows, Linux, macOS and in a browser (see https://razakhel.github.io/RaZ/demo/). You can develop with it in C++ (17 for now, but will migrate to recent versions when they're fully finalized), its base language, but is also entirely usable with Lua scripting.

Mostly rendering-oriented, as it's the main domain I'm a big fan of, it also of course features other aspects necessary to aim being a full-fledged game engine (audio, physics, ...). I'm however very interested in any kind of real-life phenomenon simulation, so I intend to try out many of those in the future (procedural generation of many things, fluid simulation, precise physics simulation, ...). Sadly, free time is not infinite froge_sad

Feel free to follow and/or star the project, or even contribute to it! You're especially very welcome to try it out, make your own project(s) and give me your feedback; several projects (only made by myself for now) are referenced on the repo's main page to give you an idea of what's easily possible (although much more can be done). I also have a (rather small for now) YouTube playlist that I use to showcase any kind of random experiment using the engine: https://www.youtube.com/playlist?list=PLLYADJ7Ri6mURjJka9ZscOH8JBRi9lEne.
There's also a dedicated GUI editor (in C++ too, using Qt), which greatly needs improvement to be actually usable and thus can also very well be contributed to (https://github.com/Razakhel/RaZor).

See the engine's repo's README and wiki (https://github.com/Razakhel/RaZ/wiki) for all information!

GitHub

GitHub - Razakhel/RaZ: Modern & multiplatform 3D game engine

Modern & multiplatform 3D game engine. Contribute to Razakhel/RaZ development by creating an account on GitHub.

#

Features summary (see https://github.com/Razakhel/RaZ#features for a more complete list):

Custom ECS architecture
Lua scripting (using sol2)
Rendering:
- OpenGL, from 3.3 to 4.6 (picks the highest supported version)
- PBR rendering (metalness/roughness)
- Render graph with customizable render passes
- "Render processes" (predefined sets of render passes): blur methods, bloom, SSR, film grain, vignette, chromatic aberration, ...
- Tessellation & compute shaders support
Audio:
- Positional 3D audio sources & listener
- Sound effects (reverberation, echo, ...)
- Mono/stereo microphone support
Physics:
- Shape definitions (plane, sphere, AABB, ...)
- Ray/shape intersection tests
- Basic rigid body simulation
Data:
- BVH (Bounding Volume Hierarchy) acceleration structure, allowing for fast ray/scene intersection tests
- Mesh formats: glTF/GLB (using https://discord.com/channels/318590007881236480/1019965526434394173 ), OBJ, FBX, OFF
- Image formats: PNG, JPEG, BMP, HDR, TGA, GIF, PPM/PGM, PSD (using stb_image)
- Audio formats: WAV
Many utilities, including multithreading & parallelization capabilities

The engine only supports OpenGL, mostly due to browser compatibility (waiting for WebGPU?) on one side, and the architectural hassle of supporting multiple APIs on the other. I've started tinkering with Vulkan almost 2 years ago, but with no real purpose. I'd very much like to support it later, as I'm very interested in it, although this would be a long-term work that I'm not willing to put time into at the moment

upbeat ivy Dec 31, 2023, 5:24 PM

#

I have been stumbling upon this one on github every other week 🙂 because its being suggested all the time

#

and it feels like you change the name every other month or so, perhaps you did in the past hehe

upbeat ivy Dec 31, 2023, 5:24 PM

#

fossil agate Better late than never, lemme introduce yet another game engine <:froge_yeehaw:1...

fossil agate Dec 31, 2023, 5:25 PM

#

upbeat ivy I have been stumbling upon this one on github every other week 🙂 because its be...

eh good to know it has some visibility! 👌

#

I've never changed its name since I began the project ~6 years ago though, although I've been trying to find a better one for a couple years now

upbeat ivy Dec 31, 2023, 5:28 PM

#

ah, hmm possible that im mixing it with another one which also keeps popping up

fossil agate Dec 31, 2023, 5:46 PM

#

most likely yeah

fossil agate Jan 1, 2024, 9:49 AM

#

A few screenshots of stuff done with the engine for demonstration:

Simple earth-like atmospheric simulation, seen from space (see https://github.com/Razakhel/Atmos)
Terrain procedural generation with simple fog & sun effect, either on CPU or GPU (using tessellation shaders) (see https://github.com/Razakhel/Midgard)
Non-PBR (yet) multi-pass bloom effect, partly based on froyok's article (see the bloom demo from the engine's examples)
SSR + bloom effect, with reflections varying over the floor's roughness

#

And a few more from the "playground" YT channel (https://www.youtube.com/playlist?list=PLLYADJ7Ri6mURjJka9ZscOH8JBRi9lEne):

Particle-based 3D curl noise visualization with compute shaders, with each particle having the color of its original position in the cube (https://www.youtube.com/watch?v=v2sskcFdpDs&list=PLLYADJ7Ri6mURjJka9ZscOH8JBRi9lEne&index=1)
Multi-pass Canny filter in shaders, used for edge detection (https://en.wikipedia.org/wiki/Canny_edge_detector) (https://www.youtube.com/watch?v=q8_6n2VwOlw&list=PLLYADJ7Ri6mURjJka9ZscOH8JBRi9lEne&index=2)
Lightning VFX attempt with 1D noise compute shader, tessellation shader with isolines, and SSR & bloom effects (https://www.youtube.com/watch?v=ToC0_7dRDOE&list=PLLYADJ7Ri6mURjJka9ZscOH8JBRi9lEne&index=4)

upbeat ivy Jan 1, 2024, 10:02 AM

#

that spagnetti monster looks cool

#

the other stuff too : >

fossil agate Jan 1, 2024, 10:13 AM

#

And finally a few videos I have on progress I made in the past:

Demonstration of the BVH structure with mouse-based ray/triangle intersection picking, with an addition of a sphere on each hit and its reinsertion into the BVH
3D Perlin & Worley noises in compute shaders (not yet tileable, but will be for procedural cloud rendering in the future)
Mesh picking using the BVH in the editor
Random experiment on a ~~Noita clone~~ "physics-based" "particle" simulation, entirely in compute shaders

fossil agate Jan 1, 2024, 10:18 AM

#

upbeat ivy the other stuff too : >

thanks! Tbh if you or anyone have other cool ideas that wouldn't take days to attempt, I'd be very interested froge_yeehaw

upbeat ivy Jan 1, 2024, 10:19 AM

#

Virtual Shadow Mapping

fossil agate Jan 1, 2024, 10:21 AM

#

yeaaah shadows in general is one of the big thing I need to get onto nervous

#

I have this weird problem that if I'm not (almost) 100% sure something is either correct or architecturally ideal, I delay that stuff

upbeat ivy Jan 1, 2024, 10:22 AM

#

2024 is the year of shadows : >

fossil agate Jan 1, 2024, 10:23 AM

#

it's been very hard doing anything major over the years, and I have a lot of unfinished stuff in my stash list froge_sad

upbeat ivy Jan 1, 2024, 10:24 AM

#

move it up the list

fossil agate Jan 1, 2024, 10:25 AM

#

it's not even in that list agonyfrog

upbeat ivy Jan 1, 2024, 10:26 AM

#

https://www.youtube.com/watch?v=IdncS8lLFyc

fossil agate Jan 1, 2024, 10:29 AM

#

now I'm pumped up froge_yeehaw

fossil agate Jan 2, 2024, 7:55 PM

#

meh I believe my engine doesn't deserve the cube role froge_sad

upbeat ivy Jan 2, 2024, 7:59 PM

#

heh how come?

#

it does the cubes

#

ah wait you dont have the role yet

#

fixed

fossil agate Jan 2, 2024, 8:00 PM

#

no idea, there's geometry that's inside out, and I don't support vertex colors so that'd explain for some

upbeat ivy Jan 2, 2024, 8:00 PM

#

its hard to see

fossil agate Jan 2, 2024, 8:00 PM

#

wee I'm approved frogapprove

upbeat ivy Jan 2, 2024, 8:00 PM

#

the textured cubes seem right

fossil agate Jan 2, 2024, 8:00 PM

#

yup the textured ones look fine

upbeat ivy Jan 2, 2024, 8:00 PM

#

sending low quality screenshot frog_police

fossil agate Jan 2, 2024, 8:08 PM

#

that'd be better as a video nice

#

that's all of them loaded though, I don't even know if all have some geometry that's actually rendered (nevermind, the debug output for each loaded mesh looks legit)

world.addEntityWithComponent<Raz::Transform>(Raz::Vec3f(10.f, 0.f, 0.f))
  .addComponent<Raz::MeshRenderer>(Raz::MeshFormat::load("deccer-cubes-main/SM_Deccer_Cubes.glb").second);
world.addEntityWithComponent<Raz::Transform>(Raz::Vec3f(-10.f, 0.f, 0.f))
  .addComponent<Raz::MeshRenderer>(Raz::MeshFormat::load("deccer-cubes-main/SM_Deccer_Cubes_Colored.glb").second);
world.addEntityWithComponent<Raz::Transform>(Raz::Vec3f(0.f, 10.f, 0.f))
  .addComponent<Raz::MeshRenderer>(Raz::MeshFormat::load("deccer-cubes-main/SM_Deccer_Cubes_Merged_Texture_Atlas.gltf").second);
world.addEntityWithComponent<Raz::Transform>(Raz::Vec3f(0.f, -10.f, 0.f))
  .addComponent<Raz::MeshRenderer>(Raz::MeshFormat::load("deccer-cubes-main/SM_Deccer_Cubes_Textured.glb").second);
world.addEntityWithComponent<Raz::Transform>(Raz::Vec3f(10.f, 10.f, 0.f))
  .addComponent<Raz::MeshRenderer>(Raz::MeshFormat::load("deccer-cubes-main/SM_Deccer_Cubes_Textured_Complex.gltf").second);
world.addEntityWithComponent<Raz::Transform>(Raz::Vec3f(-10.f, -10.f, 0.f))
  .addComponent<Raz::MeshRenderer>(Raz::MeshFormat::load("deccer-cubes-main/SM_Deccer_Cubes_Textured_Embedded.gltf").second);
// That one is huge, gotta scale down
world.addEntityWithComponent<Raz::Transform>(Raz::Vec3f(-10.f, 10.f, 0.f), Raz::Quaternionf::identity(), Raz::Vec3f(0.01f))
  .addComponent<Raz::MeshRenderer>(Raz::MeshFormat::load("deccer-cubes-main/SM_Deccer_Cubes_With_Rotation.glb").second);

upbeat ivy Jan 2, 2024, 8:41 PM

#

oh

#

there might be a goofed up version of cubes lol

#

although

#

hang on

#

this is complex

#

minus the boundingboxes and imagine there are textures on it

#

let me try cubes with rotation, that might be the goofy version heh

#

yep 🙂

#

sorry for tricking you into thinking your engine is fucked

fossil agate Jan 2, 2024, 8:48 PM

#

haha that's reassuring!

fossil agate Jan 2, 2024, 8:49 PM

#

upbeat ivy this is complex

although I don't exactly have this on my side nervous

upbeat ivy Jan 2, 2024, 8:50 PM

#

i think only one cube is "inside out"

fossil agate Jan 2, 2024, 8:53 PM

#

upbeat ivy this is complex

well I just have this cube

#

which isn't even in the file nice (result below taken from Windows' mesh viewer)

upbeat ivy Jan 2, 2024, 8:53 PM

#

xD

#

try them standalone

#

not all models at the same time

fossil agate Jan 2, 2024, 8:54 PM

#

that's the "complex" on its own 😰

#

firing RenderDoc

upbeat ivy Jan 2, 2024, 8:55 PM

#

the windows mesh viewer shows it correctly

fossil agate Jan 2, 2024, 8:56 PM

#

mmh RenderDoc says that's just a bunch of boxes, all of them being [-100; 100]

#

right, I don't use the nodes' info

#

that explains a lot

upbeat ivy Jan 2, 2024, 8:57 PM

#

😉

fossil agate Jan 2, 2024, 8:57 PM

#

I wondered if that'd be useful for common meshes, I guess it is nervous

upbeat ivy Jan 2, 2024, 8:58 PM

#

hmm but then any of the deccer cubes should haev just be "1" box at origin

fossil agate Jan 2, 2024, 9:00 PM

#

not all of them, this is merged texture atlas

#

(damn I should get on that aliasing someday too, this is awful)

upbeat ivy Jan 2, 2024, 9:00 PM

#

hmm

#

i thought this was JUST merged texture atlas

#

but geometry/node wise it should also "just" be unit cubes at origin

#

and the node world matrices take care of the rest

#

also sorry for publicly shaming you in #926896734284689428 😄

fossil agate Jan 2, 2024, 9:02 PM

#

haha no worries, that's what these cubes are made for after all!

fossil agate Jan 2, 2024, 9:02 PM

#

upbeat ivy but geometry/node wise it should also "just" be unit cubes at origin

yeah most files seem to be in that case indeed

#

I'll handle the nodes info then 👌

fossil agate Jan 3, 2024, 5:48 PM

#

well not correct yet but it's something

upbeat ivy Jan 3, 2024, 5:49 PM

#

looks like just flipperinoed axis

#

gltf exports yup

#

and there hsould be a big green cube at origin (above (in yup terms) the red one)

#

with 4? more, smaller ones around each face of it

fossil agate Jan 3, 2024, 5:50 PM

#

yeah the green cube is just extremely tiny here

#

I'm applying children the wrong way, gonna be a mess doing it the right way

upbeat ivy Jan 3, 2024, 5:50 PM

#

: )

fossil agate Jan 27, 2024, 11:06 AM

#

lil' crosspost for reference so that it's not lost, volume sphere marching through a mesh distance field: #showcase message

fossil agate Jan 27, 2024, 2:03 PM

#

and with the infamous cubes too frogapprove although the artifacts are awful here

fossil agate Jan 27, 2024, 10:25 PM

#

aaand say goodbye to the artifacts using a Fibonacci sphere froge_yeehaw

#

(looks a bit wobbly and the plane below is being eaten away, but that's the grid's definition that's too low froge_sad )

#

(oh, not for the plane, there are still some artifacts getting in the way; I assume the wobbly effect on non-axis-aligned objects is definitely due to the definition though)

#

increasing the samples to 200 (was previously 100) reduces it a lot indeed

fossil agate Mar 12, 2024, 5:46 PM

#

integration (in progress) of Tracy in the engine 👌

fossil agate Oct 13, 2024, 7:57 AM

#

after more than a year of inexplicable Lua errors which apparently have disappeared, the online demo is now up to date, including the Lua script that can be tinkered with: https://razakhel.github.io/RaZ/demo/

fossil agate Nov 2, 2024, 3:06 PM

#

and there we go, basic VR support working in side projects: https://www.youtube.com/shorts/fUf_tcOfLfQ froge_love
(sorry for the very low res though, due to the scene's dimensions I can't do much for YT to like it I guess)

YouTube

Razakhel

Atmos/RaZ - First VR render

First render of Atmos made with RaZ's initial VR support. Made with a Meta Quest 2.

Atmos: https://github.com/Razakhel/Atmos
RaZ: https://github.com/Razakhel/RaZ

▶ Play video

#RaZ - Modern & multiplatform 3D game engine