3 commits

Author	SHA1	Message	Date
Clar Fon	efda7f3f9c	Simpler lint fixes: makes ci lints work but disables a lint for now (#15376) ... Takes the first two commits from #15375 and adds suggestions from this comment: https://github.com/bevyengine/bevy/pull/15375#issuecomment-2366968300 See #15375 for more reasoning/motivation. ## Rebasing (rerunning) ```rust git switch simpler-lint-fixes git reset --hard main cargo fmt --all -- --unstable-features --config normalize_comments=true,imports_granularity=Crate cargo fmt --all git add --update git commit --message "rustfmt" cargo clippy --workspace --all-targets --all-features --fix cargo fmt --all -- --unstable-features --config normalize_comments=true,imports_granularity=Crate cargo fmt --all git add --update git commit --message "clippy" git cherry-pick e6c0b94f6795222310fb812fa5c4512661fc7887 ```	2024-09-24 11:42:59 +00:00
Patrick Walton	1141e731ff	Implement alpha to coverage (A2C) support. (#12970) ... [Alpha to coverage] (A2C) replaces alpha blending with a hardware-specific multisample coverage mask when multisample antialiasing is in use. It's a simple form of [order-independent transparency] that relies on MSAA. ["Anti-aliased Alpha Test: The Esoteric Alpha To Coverage"] is a good summary of the motivation for and best practices relating to A2C. This commit implements alpha to coverage support as a new variant for `AlphaMode`. You can supply `AlphaMode::AlphaToCoverage` as the `alpha_mode` field in `StandardMaterial` to use it. When in use, the standard material shader automatically applies the texture filtering method from ["Anti-aliased Alpha Test: The Esoteric Alpha To Coverage"]. Objects with alpha-to-coverage materials are binned in the opaque pass, as they're fully order-independent. The `transparency_3d` example has been updated to feature an object with alpha to coverage. Happily, the example was already using MSAA. This is part of #2223, as far as I can tell. [Alpha to coverage]: https://en.wikipedia.org/wiki/Alpha_to_coverage [order-independent transparency]: https://en.wikipedia.org/wiki/Order-independent_transparency ["Anti-aliased Alpha Test: The Esoteric Alpha To Coverage"]: https://bgolus.medium.com/anti-aliased-alpha-test-the-esoteric-alpha-to-coverage-8b177335ae4f --- ## Changelog ### Added * The `AlphaMode` enum now supports `AlphaToCoverage`, to provide limited order-independent transparency when multisample antialiasing is in use.	2024-04-15 20:37:52 +00:00
Matty	328008f904	Move AlphaMode into bevy_render (#12012) ... # Objective - Closes #11985 ## Solution - alpha.rs has been moved from bevy_pbr into bevy_render; bevy_pbr and bevy_gltf now access `AlphaMode` through bevy_render. --- ## Migration Guide In the present implementation, external consumers of `AlphaMode` will have to access it through bevy_render rather than through bevy_pbr, changing their import from `bevy_pbr::AlphaMode` to `bevy_render::alpha::AlphaMode` (or the corresponding glob import from `bevy_pbr::prelude::*` to `bevy_render::prelude::*`). ## Uncertainties Some remaining things from this that I am uncertain about: - Here, the `app.register_type<AlphaMode>()` call has been moved from `PbrPlugin` to `RenderPlugin`; I'm not sure if this is quite right, and I was unable to find any direct relationship between `PbrPlugin` and `RenderPlugin`. - `AlphaMode` was placed in the prelude of bevy_render. I'm not certain that this is actually appropriate. - bevy_pbr does not re-export `AlphaMode`, which makes this a breaking change for external consumers. Any of these things could be easily changed; I'm just not confident that I necessarily adopted the right approach in these (known) ways since this codebase and ecosystem is quite new to me.	2024-02-21 19:34:10 +00:00

Renamed from crates/bevy_pbr/src/alpha.rs (Browse further)