Carter Anderson 963e2f08a2 Materials and MaterialPlugin (#3428) ... This adds "high level" `Material` and `SpecializedMaterial` traits, which can be used with a `MaterialPlugin<T: SpecializedMaterial>`. `MaterialPlugin` automatically registers the appropriate resources, draw functions, and queue systems. The `Material` trait is simpler, and should cover most use cases. `SpecializedMaterial` is like `Material`, but it also requires defining a "specialization key" (see #3031). `Material` has a trivial blanket impl of `SpecializedMaterial`, which allows us to use the same types + functions for both. This makes defining custom 3d materials much simpler (see the `shader_material` example diff) and ensures consistent behavior across all 3d materials (both built in and custom). I ported the built in `StandardMaterial` to `MaterialPlugin`. There is also a new `MaterialMeshBundle<T: SpecializedMaterial>`, which `PbrBundle` aliases to.		2021-12-25 21:45:43 +00:00
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shader_defs.rs	make sub_app return an &App and add sub_app_mut() -> &mut App (#3309)	2021-12-24 06:57:30 +00:00
shader_material.rs	Materials and MaterialPlugin (#3428)	2021-12-25 21:45:43 +00:00