Skip to content

N14: Diffuse GI #295

New issue

Have a question about this project? Sign up for a free GitHub account to open an issue and contact its maintainers and the community.

Sign up for GitHub

By clicking “Sign up for GitHub”, you agree to our terms of service and privacy statement. We’ll occasionally send you account related emails.

Already on GitHub? Sign in to your account

Merged
merged 5 commits into from
Oct 6, 2020
Merged

N14: Diffuse GI #295

Show file tree
Hide file tree
Changes from all commits
Commits
Show all changes
5 commits
Select commit Hold shift + click to select a range
dd41ac8
Added section on diffuse gi
miolad Oct 3, 2020
e5b3c81
Changed phrase sound a bit better
miolad Oct 3, 2020
525474a
N14: diffgl: Smaller GIF
ozkriff Oct 6, 2020
552d79b
N14: diffgi: Style & fmt tweaks
ozkriff Oct 6, 2020
bf61e81
Merge branch 'source' into n14-diff-gi
ozkriff Oct 6, 2020
File filter

Filter by extension

Filter by extension
Conversations
Failed to load comments.
Loading
Jump to
Jump to file
Failed to load files.
Loading
Diff view
Diff view
Binary file added content/posts/newsletter-014/diff-gi.gif
View file
Open in desktop
Loading
Sorry, something went wrong. Reload?
Sorry, we cannot display this file.
Sorry, this file is invalid so it cannot be displayed.
26 changes: 26 additions & 0 deletions content/posts/newsletter-014/index.md
View file
Open in desktop
Original file line number Diff line number Diff line change
Expand Up @@ -421,6 +421,32 @@ The source code [can be found here][bevy-flappy-src].
[bevy-flappy-video]: https://youtube.com/watch?v=Qjc0V58lB7A
[bevy-flappy-src]: https://github.com/TanTanDev/flappy_bevy

### [Real-Time Global Illumination in WGPU][gi-post]

[![diff-gi-gif](diff-gi.gif)][gi-post]
_Infinite light bounces in Cornell Box_

[DI2edd] shared his [real-time diffuse global illumination demo on /r/rust_gamedev][gi-post].
It's written in 100% Rust and uses WGPU for graphics, proving that the API
is an excellent choice even for advanced computer graphics applications.

The technique provides real time global illumination for static lambertian
geometry, and is the implementation of the 2017 paper ["Real-time Global
Illumination by Precomputed Local Reconstruction
from Sparse Radiance Probes"](https://arisilvennoinen.github.io/Projects/RTGI/index.html),
which proposes a spherical harmonics-based approach to solve the rendering equation
in real time.

In practice, this means that the expensive light transport calculations are performed
in a precomputation step, which relies on - among others - [embree-rs],
and [nalgebra] to produce a compressed
representation of the scene that is then used for lighting reconstruction at runtime.

[gi-post]: https://reddit.com/r/rust_gamedev/comments/ixocl2/real_time_diffuse_global_illumination
[DI2edd]: https://reddit.com/u/DI2edd
[embree-rs]: https://github.com/Twinklebear/embree-rs
[nalgebra]: https://github.com/dimforge/nalgebra

## Library & Tooling Updates

### [Thunderdome]
Expand Down